Bhattacharya, D., Sreekumar, P., Mukherjee, R.
The origin of the extragalactic gamma-ray background (EGRB) is still an open question, even after nearly forty years of its discovery. The emission could originate from either truly diffuse processes...
The GENIE Neutrino Monte Carlo Generator (2009)
Andreopoulos, C., Bell, A., Bhattacharya, D., Cavanna, F., Dobson, J., Dytman, S., ...
GENIE is a new neutrino event generator for the experimental neutrino physics community. The goal of the project is to develop a `canonical' neutrino interaction physics Monte Carlo whose validity...
Multi-wavelength observations of afterglow of GRB 080319B and the modeling constraints (2009)
Pandey, S. B., Castro-Tirado, A. J., Jelínek, M., Kamble, Atish P., Gorosabel, J., Postigo, A. De Ugarte, ...
We present observations of the afterglow of GRB 080319B at optical, mm and radio frequencies from a few hours to 67 days after the burst. Present observations along with other published...
Sudden stratospheric warmings seen in MINOS deep underground muon data (2009)
Osprey, S., Barnett, J., Smith, J., Adamson, P., Andreopoulos, C., Arms, K. E., ...
The rate of high energy cosmic ray muons as measured underground is shown to be strongly correlated with upper-air temperatures during short-term atmospheric (10-day) events. The effects are seen by...
Kukreti, Himani, Dash, Paban, Parida, Manmohan, Chaudhary, Artee, Saxena, Parag, Rautela, RS, ...
Abstract Background Dengue virus type 1 (DENV-1) have been mostly circulating silently with dominant serotypes DENV-2 and DENV-3 in India. However recent times have marked an increase in DENV-1...
Genomic Footprints of a Cryptic Plastid Endosymbiosis in Diatoms (2009)
Moustafa, A, Beszeri, B, Maier, UG, Bowler, C, Valentin, K, Bhattacharya, D
Spark Plasma Sintering of BiFeO3 (2009)
Mazumder, R, Chakravarty, D, Bhattacharya, D, Sen, A
Dense BiFeO3 ceramics were prepared by a novel spark plasma sintering (SPS) technique. The sintering was conducted at temperatures ranging from 675 to 750 °C under 70 MPa pressure. A bulk density...
Adamson, P., Andreopoulos, C., Arms, K. E., Armstrong, R., Auty, D. J., Ayres, D. S., ...
We report the first detailed comparisons of the rates and spectra of neutral-current neutrino interactions at two widely separated locations. A depletion in the rate at the far site would indicate...
Gamma-ray luminosity function of Gamma-ray bright AGNs (2008)
Bhattacharya, D., Sreekumar, P., Mukherjee, R.
Detection of Gamma-ray emission from a class of active galactic nuclei (viz blazars), has been one of the important findings from the Compton Gamma Ray Observatory (CGRO). However, their Gamma-ray...
Measurement of neutrino oscillations with the MINOS detectors in the NuMI beam (2008)
Adamson, P., Andreopoulos, C., Arms, K. E., Armstrong, R., Auty, D. J., Ayres, D. S., ...
This Letter reports new results from the MINOS experiment based on a two-year exposure to muon neutrinos from the Fermilab NuMI beam. Our data are consistent with quantum-mechanical oscillations of...
Chikungunya fever: A re-emerging viral infection (2008)
Chhabra, M., Mittal, V., Bhattacharya, D., Rana, U.V.S., Lal, S.
Chikungunya (CHIK) fever is a re-emerging viral disease characterized by abrupt onset of fever with severe arthralgia followed by constitutional symptoms and rash lasting for 1-7 days. The disease is...
Hard electron energy distribution in the relativistic shocks of gamma-ray burst afterglows (2008)
Particle acceleration in relativistic shocks is not a very well understood subject. Owing to that difficulty, radiation spectra from relativistic shocks, such as those in gamma-ray burst (GRB)...
Optical Observations of GRB 050401 Afterglow : A case for Double Jet Model (2008)
Kamble, Atish, Misra, Kuntal, Bhattacharya, D., Sagar, Ram
The afterglow of GRB 050401 presents several novel and interesting features : [1] An initially faster decay in optical band than in X-rays. [2] A break in the X-ray light curve after $\sim$ 0.06 day...
Hard electron energy distribution in the relativistic shocks of gamma-ray burst afterglows (2008)
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Hard Electron Energy Distribution in the Relativistic Shocks of GRB Afterglows (2008)
Particle acceleration in relativistic shocks is not a very well understood subject. Owing to that difficulty, radiation spectra from relativistic shocks, such as those in GRB afterglows, have been...
Detailed study of the GRB 030329 radio afterglow deep into the non-relativistic phase (2008)
Horst, AJ Van Der, Kamble, A, Resmi, L, Wijers, RAMJ, Bhattacharya, D, Scheers, B, ...
Context. We explore the physics behind one of the brightest radio afterglows ever, GRB 030329, at late times when the jet is non-relativistic. Aims. We determine the physical parameters of the blast...
Detailed study of the GRB 030329 radio afterglow deep into the non-relativistic phase (2008)
Van Der Horst, A.J., Kamble, Atish, Resmi, L., Bhattacharya, D., Scheers, B., ...
Open Access
Detailed study of the GRB 030329 radio afterglow deep into the non-relativistic phase (2008)
Horst, AJ Van Der, Kamble, A, Resmi, L, Wijers, RAMJ, Bhattacharya, D, Scheers, B, ...
Context. We explore the physics behind one of the brightest radio afterglows ever, GRB 030329, at late times when the jet is non-relativistic. Aims. We determine the physical parameters of the blast...
Hard electron energy distribution in the relativistic shocks of gamma-ray burst afterglows (2008)
Particle acceleration in relativistic shocks is not a very well understood subject. Owing to that difficulty, radiation spectra from relativistic shocks, such as those in gamma-ray burst (GRB)...
Detailed study of the GRB 030329 radio afterglow deep into the non-relativistic phase (2008)
Kamble, A., Resmi, L., Bhattacharya, D., Scheers, B., ...
Context. We explore the physics behind one of the brightest radio afterglows ever, GRB 030329, at late times when the jet is non-relativistic. Aims. We determine the physical parameters of the blast...
Estimating Starburst Supernova Rates Using OSSE Observations of M82 and NGC 253 (2007)
Bhattacharya The Kurfess, D. Bhattacharya, J. D. Kurfess, D. D. Clayton, N. Gehrels, W. N. Johnson, ...
We have used the OSSE observations of the starburst galaxies NGC 253 and M82 to obtain upper limits to the Type Ia and Ib supernova rates in these galaxies. Monte Carlo simulations of randomly...
Evidence for Extended High Energy (2007)
Fl-Ray Emission, T. R. Jaffe, D. Bhattacharya, D. D. Dixon, A. D. Zych
We present an image reconstruction of the region around the Rosette Nebula and Monoceros SNR using high energy (? 100 MeV) fl-ray data from the Energetic Gamma Ray Experiment Telescope (EGRET). The...
The dark nature of GRB 051022 and its host galaxy (2007)
Castro-Tirado, A. J, Bremer, M, McBreen, S, Gorosabel, J, Guziy, S, Fakthullin, T. A, ...
Aims.We present multiwavelength (X-ray/optical/near-infrared/millimetre) observations of GRB 051022 between 2.5 h and ~1.15 yr after the event. It is the most intense gamma-ray burst (~10-4 erg cm-2)...
The dark nature of GRB 051022 and its host galaxy (2007)
Castro-Tirado, A.J., Bremer, M., McBreen, S., Kamble, A.P., Bhattacharya, D.
Open Access.
Type IIP supernova SN 2004et: a multiwavelength study in X-ray, optical and radio (2007)
Misra, Kuntal, Pooley, Dave, Chandra, Poonam, Bhattacharya, D., Ray, Alak K., Sagar, Ram, ...
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Type IIP Supernova SN 2004et: A Multi-Wavelength Study in X-Ray, Optical and Radio (2007)
Misra, Kuntal, Pooley, Dave, Chandra, Poonam, Bhattacharya, D., Ray, Alak K., Sagar, Ram, ...
We present X-ray, broad band optical and low frequency radio observations of the bright type IIP supernova SN 2004et. The \cxo observed the supernova at three epochs, and the optical coverage spans a...
Detailed study of the GRB 030329 radio afterglow deep into the non-relativistic phase (2007)
Van Der Horst, A. J., Kamble, A., Resmi, L., Bhattacharya, D., Scheers, B., ...
We explore the physics behind one of the brightest radio afterglows ever, GRB 030329, at late times when the jet is non-relativistic. We determine the physical parameters of the blast wave and its...
GRB 030329: 3 years of radio afterglow monitoring (2007)
Van Der Horst, A. J., Kamble, A., Resmi, L., Bhattacharya, D., Rol, E., ...
Radio observations of gamma-ray burst (GRB) afterglows are essential for our understanding of the physics of relativistic blast waves, as they enable us to follow the evolution of GRB explosions much...
GRB 030329: three years of radio afterglow monitoring (2007)
Van Der Horst, A. J., Kamble, A., Resmi, L., Bhattacharya, D., Rol, E., ...
Radio observations of gamma-ray burst (GRB) afterglows are essential for our understanding of the physics of relativistic blast waves, as they enable us to follow the evolution of GRB explosions much...
Adamson, P., Alexopoulos, T., J. Alner, G., Anderson, K., Andreopoulos, C., ...
The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the...
Charge-Separated Atmospheric Neutrino-Induced Muons in the MINOS Far Detector (2007)
Adamson, P., Andreopoulos, C., E. Arms, K., Armstrong, R., J. Auty, D., Avvakumov, S., ...
We found 140 neutrino-induced muons in 854.24 live days in the MINOS far detector. We looked for evidence of neutrino disappearance in this data set by computing the ratio of the number of low...
G. Michael, D., Adamson, P., Alexopoulos, T., J. Alner, G., Anderson, K., ...
This letter reports results from the MINOS experiment based on its initial exposure to neutrinos from the Fermilab NuMI beam. The rate and energy spectra of charged current muon neutrino interactions...
Adamson, P., Andreopoulos, C., E. Arms, K., Armstrong, R., J. Auty, D., Avvakumov, S., ...
The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the...
Optical observations of GRB 060124 afterglow: a case for an injection break (2007)
Misra, K, Bhattacharya, D, Sahu, D. K, Ram Sagar, Anupama, G. C, Castro-Tirado, A. J, ...
Aims.We present broad band optical afterglow observations of a long duration GRB 060124 using the 1.04-m Sampurnanand Telescope at ARIES, Nainital and the 2.01-m HCT at IAO, Hanle, including the...
Optical observations of GRB 060124 afterglow: A case for an injection break (2007)
Misra, K., Bhattacharya, D., Sahu, D.K., Sagar, R., Anupama, G.C., Castro-Tirado, A.J., ...
Open Access.
De Ugarte, Postigo A., Fatkhullin, T.A., Bhattacharya, D., Kamble, Atish P.
Open Access.
GRB 030329: 3 years of radio afterglow monitoring (2007)
Van Der Horst, A.J., Kamble, Atish, Resmi, L., Bhattacharya, D., Rol, E., ...
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
Optical observations of GRB 060124 afterglow: A case for an injection break (2007)
Misra, Kuntal, Bhattacharya, D., Sahu, D. K., Sagar, Ram, Anupama, G. C., Castro-Tirado, A. J., ...
We present broad band optical afterglow observations of a long duration GRB 060124 using the 1.04-m Sampurnanand Telescope at ARIES, Nainital and the 2.01-m HCT at IAO, Hanle, including the earliest...
Optical observations of GRB 060124 afterglow: a case for an injection break (2007)
Misra, Kuntal, Bhattacharya, D., Sahu, D.K., Sagar, R., Anupama, G.C., Castro-Tirado, A.J., ...
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
The dark nature of GRB 051022 and its host galaxy (2007)
Castro-Tirado, A. J., Bremer, M., McBreen, S., Gorosabel, J., Guziy, S., Fakthullin, T. A., ...
Postigo, A De Ugarte, Fatkhullin, T. A., Johannesson, G., Gorosabel, J., Sokolov, V. V., Castro-Tirado, A. J., ...
Aims. Understand the shape and implications of the multiband light curve of GRB 050408, an X-ray rich (XRR) burst. Methods. We present a multiband optical light curve, covering the time from the...
A consistent description of neutron stars with quark cores (2006)
Soni, Vikram, Bhattacharya, D.
This item consists of 2 files: Author's postprint version (Open Access) and Published version (Restricted Access)
The celestial mechanics of Newton (2006)
Newton's law of universal gravitation laid the physical foundation of celestial mechanics. This article reviews the steps towards the law of gravitation, and highlights some applications to celestial...
GRB 030329: Three years of radio afterglow monitoring (2006)
Van Der Horst, AJ, Kamble, A, Wijer, RAMJ, Resmi, L, Bhattacharya, D, Rol, E, ...
Radio observations of Gamma-Ray Burst (GRB) afterglows are essential for our understanding of the physics of relativistic blast waves, as they enable us to follow the evolution of GRB explosions much...
Decortication in chronic pleural empyema (2006)
Rai, SP, Kaul, SK, Tripathi, RK, Bhattacharya, D, Kashyap, M
Misra, K, Resmi, L, Pandey, S. B, Bhattacharya, D, Sagar, R
We present the CCD Cousins R band photometric observations of the afterglow of GRB 041006. The multiband afterglow evolution is modelled using an underlying `hard' electron energy spectrum with a p1...
Misra, Kuntal, Resmi, L., Pandey, S. B., Bhattacharya, D., Sagar, R.
We present the CCD Cousins R band photometric observations of the afterglow of GRB 041006. The multiband afterglow evolution is modelled using an underlying `hard' electron energy spectrum with a...
Optical afterglow observations of GRB 021004 and GRB 030226 (2005)
Pandey, S.B., Sagar, R., Bhattacharya, D.
Paper presented at the AIP conference held at Torun, Poland, during 20-24 June 2005. Ed. by Tomasz Bulik et al.
Optical afterglow observations of GRB 021004 and GRB 030226 (2005)
Pandey, S.B., Sagar, R., Bhattacharya, D.
Open Access. Paper presented at the AIP conference on "Astrophysical sources of high energy particles and radiation" edited by T. Bulik et al.
Resmi, L., Ishwara-Chandra, C.H., Castro-Tirado, A.J., Bhattacharya, D.
We present radio, millimeter and optical observations of the afterglow of GRB 030329. UBVR_CIC photometry is presented for a period of 3 h to 34 days after the burst. Radio monitoring at 1280 MHz has...
Resmi, L, Chandra, Ishwara CH, Tirado, Castro AJ, Bhattacharya, D, Rao, AP, Bremer, M, ...
We present radio, millimeter and optical observations of the afterglow of GRB 030329. $UBVR_CI_C$ photometry is presented for a period of 3 h to 34 days after the burst. Radio monitoring at 1280 MHz...
Resmi, L., Ishwara-Chandra, C. H., Castro-Tirado, A. J., Bhattacharya, D., Rao, A. P., Bremer, M., ...
We present radio, millimeter and optical observations of the afterglow of GRB030329. UBVR_{C}I_{C} photometry is presented for a period of 3 hours to 34 days after the burst. Radio monitoring at 1280...
Multiband optical photometry and bolometric light curve of the Type Ia supernova 2004S (2005)
Misra, Kuntal, Kamble, Atish P., Bhattacharya, D., Sagar, R.
Restricted Access. An open access version is available at arXiv.org.(one of the alternative locations)
Multiband Optical Photometry and Bolometric Light Curve of the Type Ia Supernova 2004S (2005)
Misra, Kuntal, Kamble, Atish P., Bhattacharya, D., Sagar, Ram
We present $\rm BVR_{c}I_{c}$ broad band CCD photometry of the Type Ia supernova SN 2004S, which appeared in the galaxy MCG-05-16-021, obtained during 2004 February 12 to March 22. Multiband and...
Resmi, L, Chandra, Ishwara CH, Tirado, Castro AJ, Bhattacharya, D, Rao, AP, Bremer, M, ...
We present radio, millimeter and optical observations of the afterglow of GRB 030329. $UBVR_CI_C$ photometry is presented for a period of 3 h to 34 days after the burst. Radio monitoring at 1280 MHz...
Adamson, P., Alexopoulos, T., J. Alner, G., Anderson, K., Andreopoulos, C., ...
The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the...
Adamson, P., Alexopoulos, T., J. Alner, G., Anderson, K., Andreopoulos, C., ...
The complete 5.4 kton MINOS far detector has been taking data since the beginning of August 2003 at a depth of 2070 meters water-equivalent in the Soudan mine, Minnesota. This paper presents the...
Misra, Kuntal, Resmi, L., Pandey, S.B., Bhattacharya, D., Sagar, R.
We present the CCD Cousins R band photometric observations of the afterglow of GRB 041006. The multiband afterglow evolution is modelled using an underlying `hard' electron energy spectrum with a...
Magnetic Barkhausen emission to evaluate fatigue damage in a low carbon structural steel (2005)
Sagar, S., Parida, N., Das, S., Dobmann, G., Bhattacharya, D.
The various stages of fatigue damage in low carbon structural steel have been characterized using magnetic Barkhausen emission (MBE) signal analysis technique during high cycle fatiguing. The...
Magnetic characterization of cold rolled and aged AISI 304 stainless steel (2005)
Sagar, S., Ravi Kumar, B., Dobmann, G., Bhattacharya, D.
Magnetic easy axis predicted by the orientation distribution of the maximum amplitude of magnetic Barkhausen emission (MBE), which is obtained by magnetization in radial directions from the center of...
Synthesis and sintering characteristics of Y–Ba–Cu-oxide superconductors (2004)
Pathak, L C, Mishra, Suman K, Bhattacharya, D, Chopra, K L
Y–Ba–Cu-Oxide (YBCO) powder were prepared by three different techniques and the isothermal sintering characteristics of the synthesized powder were systematically investigated using a...
New window on strange quark matter as the ground state of strongly interacting matter (2004)
Soni, Vikram, Bhattacharya, D.
If strange quark matter is the true ground state of matter, it must have lower energy than nuclear matter. Simultaneously, two-flavor quark matter must have higher energy than nuclear matter, for...
Early optical and millimeter observations of GRB 030226 afterglow (2004)
Pandey, S.B., Sagar, R., Anupama, G.C., Bhattacharya, D., Sahu, D.K., Castro-Tirado, A.J., ...
The CCD magnitudes in Johnson UBV and Cousins RI photometric passbands for the afterglow of the long duration GRB 030226 are presented. Upper limits of a few mJy to millimeter wave emission at the...
Prototype TIGRE compton gamma-ray balloon-borne telescope (2004)
Bhattacharya, D, O'Neill, T J, Akyuz, A, Samimi, J, Zych, A D
A prototype balloon-borne telescope is being constructed for gamma-ray observations in the MeV energy range. The Tracking and Imaging Gamma-Ray Experiment (TIGRE) uses multi-layers of thin silicon...
Synthesis and sintering characteristics of Y–Ba–Cu-oxide superconductors (2004)
Pathak, L C, Mishra, S K, Bhattacharya, D, Chopra, K L
Y–Ba–Cu-Oxide (YBCO) powder were prepared by three different techniques and the isothermal sintering characteristics of the synthesized powder were systematically investigated using a...
Early optical and millimeter observations of GRB 030226 afterglow (2004)
Pandey, S. B, Sagar, R, Anupama, G. C, Bhattacharya, D, Sahu, D. K, Castro-Tirado, A. J, ...
The CCD magnitudes in Johnson UBV and Cousins RI photometric passbands for the afterglow of the long duration GRB 030226 are presented. Upper limits of a few mJy to millimeter wave emission at the...
Early optical and millimeter observations of GRB 030226 afterglow (2003)
Pandey, S. B., Sagar, R., Anupama, G. C., Bhattacharya, D., Sahu, D. K., Castro-Tirado, A. J., ...
The CCD magnitudes in Johnson $UBV$ and Cousins $RI$ photometric passbands for the afterglow of the long duration GRB 030226 are presented. Upper limits of a few mJy to millimeter wave emission at...
Optical observations of the bright long duration peculiar GRB 021004 afterglow (2003)
Pandey, SB, Sahu, DK, Resmi, L, Sagar, R, Anupama, GC, Bhattacharya, D, ...
The CCD magnitudes in Johnson $B,V$ and Cousins $R$ and $I$ photometric passbands are determined for the bright long duration GRB 021004 afterglow from 2002 October 4 to 16 starting $\sim$ 3 hours...
The optical afterglow of the not so dark GRB 021211 (2003)
Pandey, S.B., Anupama, G.C., Sagar, R., Bhattacharya, D., Castro-Tirado, A.J., Sahu, D.K., ...
We determine Johnson B,V and Cousins R,I photometric CCD magnitudes for the afterglow of GRB 021211 during the first night after the GRB trigger. The afterglow was very faint and would have been...
Optical afterglow of the not so dark GRB 021211 (2003)
Pandey, S. B., Anupama, G. C., Sagar, R., Bhattacharya, D., Castro-Tirado, A. J., Sahu, D. K., ...
We determine Johnson $B,V$ and Cousins $R,I$ photometric CCD magnitudes for the afterglow of GRB 021211 during the first night after the GRB trigger. The afterglow was very faint and would have been...
SN 2002ap, the hypernova of class Ic (2003)
Pandey, S. B., Sahu, D. K., Anupama, G. C., Bhattacharya, D., Sagar, Ram
The supernova SN 2002ap was discovered in the outer regions of the nearby spiral M74 on January 29.4 UT. Early photometric and spectroscopic observations indicate the supernova belongs to the class...
A flattening in the optical light curve of SN 2002ap (2003)
Pandey, S.B., Anupama, G.C., Sagar, R., Bhattacharya, D., Sahu, D.K., Pandey, J.C.
Restricted Access. An open access version is available at NASA ADS (alternative location).
A dynamic sky simulation for the scanning sky monitor on ASTROSAT (2003)
Mishra, Sushila Devi, Bhattacharya, D.
Presented at the 22nd meeting of the Astronomical Society of India, Thiruvananthapuram, 2003.
Image reconstruction for a continuously rotating coded mask camera (2003)
Ravi Shankar, B.T., Bhattacharya, D.
Presented at the 22nd meeting of the Astronomical Society of India, Thiruvananthapuram, 2003.
Evolution of an afterglow with a hard electron spectrum (2003)
Diffusive shock acceleration theory suggests that the ``universal'' energy spectrum of electrons with a power-law index p approximately equal to 2.3, commonly used to model GRB afterglows, cannot...
Optical observations of the bright long duration peculiar GRB 021004 afterglow (2003)
Pandey, SB, Sahu, DK, Resmi, L, Sagar, R, Anupama, GC, Bhattacharya, D, ...
The CCD magnitudes in Johnson $B,V$ and Cousins $R$ and $I$ photometric passbands are determined for the bright long duration GRB 021004 afterglow from 2002 October 4 to 16 starting $\sim$ 3 hours...
Optical observations of the bright long duration peculiar GRB 021004 afterglow (2003)
Pandey, S.B., Sahu, D.K., Resmi, L., Sagar, R., Anupama, G.C., Bhattacharya, D., ...
The CCD magnitudes in Johnson $B,V$ and Cousins $R$ and $I$ photometric passbands are determined for the bright long duration GRB 021004 afterglow from 2002 October 4 to 16 starting $\sim$ 3 hours...
SN 2002ap, the hypernova of class Ic (2003)
Pandey, S.B., Sahu, D.K., Anupama, G.C., Bhattacharya, D., Sagar, R.
The supernova SN 2002ap was discovered in the outer regions of the nearby spiral M74 on January 29.4 UT. Early photometric and spectroscopic observations indicate the supernova belongs to the class...
Energy and radiation spectrum of electrons in ultra-relativistic shocks of GRB afterglows (2003)
We consider particle acceleration near ultra relativistic shocks (shock p 1) and the distribution of accelerated particles in the shock downstream. We suggest that the electron energy spectrum will...
A Flattening in the Optical Light Curve of SN 2002ap (2003)
Pandey, S. B, Anupama, G. C, Sagar, R, Bhattacharya, D, Sahu, D. K, Pandey, J. C
The optical afterglow of the not so dark GRB 021211 (2003)
Pandey, S. B, Anupama, G. C, Sagar, R, Bhattacharya, D, Castro-Tirado, A. J, Sahu, D. K, ...
We determine Johnson B,V and Cousins R,I photometric CCD magnitudes for the afterglow of GRB 021211 during the first night after the GRB trigger. The afterglow was very faint and would have been...
Payload data processing (2003)
Restricted Access. Sponsered by Aeronautical Society of India.
SN 2002ap, the Hypernova of Class Ic (2003)
Pandey, S. B, Sahu, D. K, Anupama, G. C, Bhattacharya, D, Sagar, R
The supernova SN 2002ap was discovered in the outer regions of the nearby spiral M74 on January 29.4 UT. Early photometric and spectroscopic observations indicate the supernova belongs to the class...
Energy and Radiation Spectrum of Electrons in Ultra-relativistic Shocks of GRB Afterglows (2003)
We consider particle acceleration near ultra relativistic shocks (shock p 1) and the distribution of accelerated particles in the shock downstream. We suggest that the electron energy spectrum will...
Optical observations of the bright long duration peculiar GRB 021004 afterglow (2002)
Pandey, S. B., Sahu, D. K., Resmi, L., Sagar, R., Anupama, G. C., Bhattacharya, D., ...
The CCD magnitudes in Johnson $B,V$ and Cousins $R$ and $I$ photometric passbands are determined for the bright long duration GRB 021004 afterglow from 2002 October 4 to 16 starting $\sim$ 3 hours...
A flattening in the Optical Light Curve of SN 2002ap (2002)
Pandey, S. B., Anupama, G. C., Sagar, R., Bhattacharya, D., Sahu, D. K., Pandey, J. C.
We present the $UBVR_cI_c$ broad band optical photometry of the Type Ic supernova SN 2002ap obtained during 2002 February 06 -- March 23 in the early decline phases and also later on 2002 15 August....
Imaging with the Scanning Sky Monitor on ASTROSAT (2002)
Bhattacharya, D, Shankar, B. T. R
This paper describes the status of the development of software for coded mask imaging with the Scanning Sky Monitor aboard the proposed Indian multi wavelength astronomy satellite ASTROSAT.
The STACEE-32 Ground Based Gamma-ray Detector (2002)
Bhattacharya, D., Boone, L. M., Chantell, M. C., Conner, Z., Covault, C. E., ...
We describe the design and performance of the Solar Tower Atmospheric Cherenkov Effect Experiment detector in its initial configuration (STACEE-32). STACEE is a new ground-based gamma ray detector...
Evolution of neutron star magnetic fields (2002)
This paper reviews the current status of the theoretical models of the evolution of the magnetic fields of neutron stars other than magnetars. It appears that the magnetic fields of neutron stars...
Imaging with the scanning sky monitor on ASTROSAT (2002)
Bhattacharya, D., Ravi Shankar, B.T.
Presented at the 21st meeting of the Astronomical Society of India, Pune, 2002.
Sagar, S., Ravi Kumar, B., Kopp, M., Altpeter, I., Dobmann, G., Bhattacharya, D.
AISI 304 is the most widely used alloy in the industry of the austenitic group. It is non magnetic, has excellent corrosion resistance, unusually good formability and also the formation of...
General relativistic spectra from accretion disks around rapidly rotating neutron stars (2002)
Bhattacharyya, S., Bhattacharya, D., Misra, R., Thampan, A.V.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations). The Physics of Cataclysmic Variables and Related Objects, ASP Conference Proceedings, Vol. 261....
Optical follow-up of GRB afterglows from UPSO, Naini Tal (2001)
Pandey, S.B., Sagar, R., Mohan, V., Pandey, A.K., Bhattacharya, D., Castro-Tirado, A.J.
Successful optical photometric observations of five GRB afterglows namely GRB 990123, GRB 991208, GRB 991216, GRB 000301c and GRB 000926 have been carried out from State Observatory Naini Tal till...
Bhattacharyya, Sudip, Bhattacharya, D., Thampan, Arun V.
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Bhattacharyya, S, Bhattacharya, D, Thampan, A V
We present computed spectra, as seen by a distant observer, from the accretion disc around a rapidly rotating neutron star. Our calculations are carried out in a fully general relativistic framework,...
Flat spectrum gamma ray burst afterglows (2001)
Temporal behaviour of GRB afterglow light curve is derived for the case where the electron energy distribution is relatively hard, with the power-law index p lying between 1.0 and 2.0. It is shown...
Sagar, R., Stalin, C.S., Bhattacharya, D., Pandey, S.B., Mohan, V., Castro-Tirado, A.J., ...
We report photometric observations of the optical afterglow of GRB 010222 in V, R and I passbands carried out between 22-27 February 2001 at Nainital. We determine the CCD Johnson BV and Cousins RI...
Sagar, R., Stalin, C. S., Bhattacharya, D., Pandey, S. B., Mohan, V., Castro-Tirado, A. J., ...
We report photometric observations of the optical afterglow of GRB010222 in V,R and I passbands carried out at UPSO, Naini Tal between 22-27 Feb 2001. We determine CCD Johnson BV and Cousins RI...
GRB 000926 and its optical afterglow: Another possible evidence for non-isotropic emission (2001)
Sagar, R., Pandey, S.B., Mohan, V., Bhattacharya, D., Castro-Tirado, A.J.
The CCD Johnson BV and Cousins RI photomertric magnitudes are determined for 20 stars in the field of GRB 000926. They are used to calibrate the present R as well as published BVRI photometric...
Effect of sintering atmosphere on the weak-link behaviour of YBCO superconductors (2001)
Pathak, L C, Mishra, S K, Das, S K, Bhattacharya, D, Chopra, K L
Weak-link behaviour of YBa2Cu3Ox (1 2 3) superconductors sintered in different atmospheres are studied by measuring the variation of critical current densities (Jc) near the superconducting...
GRB 000926 and its optical afterglow : Another possible evidence for non-isotropic emission (2001)
Sagar, R, Pandey, S. B, Mohan, V, Bhattacharya, D, Castro-Tirado, A. J
The CCD Johnson BV and Cousins RI photomertric magnitudes are determined for 20 stars in the field of GRB 000926. They are used to calibrate the present R as well as published BVRI photometric...
Sagar, R, Stalin, C. S, Bhattacharya, D, Pandey, S. B, Mohan, V, Castro-Tirado, A. J, ...
We report photometric observations of the optical afterglow of GRB 010222 in V, R and I passbands carried out between 22-27 February 2001 at Nainital. We determine the CCD Johnson BV and Cousins RI...
Flat Spectrum Gamma Ray Burst Afterglows (2001)
Temporal behaviour of GRB afterglow light curve is derived for the case where the electron energy distribution is relatively hard, with the power-law index p lying between 1.0 and 2.0. It is shown...
Optical follow-up of GRB afterglows from UPSO, Naini Tal (2001)
Pandey, S. B, Sagar, R, Mohan, V, Pandey, A. K, Bhattacharya, D, Castro-Tirado, A. J
Successful optical photometric observations of five GRB afterglows namely GRB 990123, GRB 991208, GRB 991216, GRB 000301c and GRB 000926 have been carried out from State Observatory Naini Tal till...
Improved analysis of COMPTEL solar neutron data, with application to the 15 June 1991 flare (2001)
Toner, M.P., Ryan, J.M., MacKinnon, A.L., Bhattacharya, D., Macpherson, K.P., McConnell, M.L., ...
Direct solar flare neutrons are a valuable diagnostic of high- energy ion acceleration in these events, and COMPTEL improves over all previous cosmic neutron detectors in its capacity for neutron...
Portegies Zwart, S.F., Bhattacharya, D., Kaper, L.
The recent finding by Chevalier & Ilovaisky (1998) from Hipparcos observations that OB-supergiant X-ray binaries have relatively large runaway velocities (mean peculiar tangential velocity avvt = 42...
Performance of the STACEE Atmospheric Cherenkov Telescope (2000)
Bhattacharya, D., Boone, L. M., Chantell, M. C., Conner, Z., Covault, C. E., ...
The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is located at the National Solar Thermal Test Facility of Sandia National Laboratories in Albuquerque, New Mexico, USA. The field of...
GRB 000926 and its optical afterglow: Another evidence for non-isotropic emission (2000)
Sagar, R., Pandey, S. B., Mohan, V., Bhattacharya, D., Castro-Tirado, A. J.
CCD Johnsons BV and Cousins RI photometric magnitudes are determined for 20 stars in the field of GRB 000926. Using them as calibrators, B and R band light curves are constructed of the afterglow...
Oser, STACEE Collaboration: S., Bhattacharya, D., Boone, L. M., Chantell, M. C., Conner, Z., Covault, C. E., ...
The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a new ground-based atmospheric Cherenkov telescope for gamma-ray astronomy. STACEE uses the large mirror area of a solar heliostat...
Mitra, D., Konar, S., Bhattacharya, D., Hoensbroech, A.V., Seiradakis, J.H., Wielebinski, R.
Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations. ulsar Astronomy - 2000 and Beyond, ASP Conference Series, Vol. 202; Proceedings of the 177th...
Mitra, D., Konar, S., Bhattacharya, D., Hoensbroech, A. V., Seiradakis, J. H., Wielebinski, R.
The evolution of the multipolar structure of the magnetic field of isolated neutron stars is studied assuming the currents to be confined to the crust. Lower orders ($\le 25$) of multipole are seen...
Magnetic field evolution of accreting neutron stars - III (1999)
Konar, Sushan, Bhattacharya, D.
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Evolution of the multipolar magnetic field in isolated neutron stars (1999)
Mitra, D., Konar, Sushan, Bhattacharya, D.
The evolution of the multipolar structure of the magnetic field of isolated neutron stars is studied assuming the currents to be confined to the crust. We find that, except for multipoles of very...
Galama, T.J., Briggs, M.S., Bhattacharya, D., Et Al.
Restricted Access.
Spectral Energy Distributions and Light Curves of GRB 990123 and its Afterglow (1999)
Galama, T. J., Briggs, M. S., Vreeswijk, P. M., Rol, E., Band, D., ...
Gamma-ray bursts (GRBs) are thought to result from the interaction of an extremely relativistic outflow interacting with a small amount of material surrounding the site of the explosion....
Magnetic field evolution of accreting neutron stars - II (1999)
Konar, Sushan, Bhattacharya, D.
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Optical follow up of the GRB 990123 source from UPSO, Nainital (1999)
Sagar, R., Pandey, A. K., Mohan, V., Yadav, R. K. S., Bhattacharya, D., ...
The CCD magnitudes in Johnson $BV$ and Cousins $R$ photometric passbands are determined for the optical transient of GRB 990123. These observations have been taken approximately 12 hours after...
Thampan, Arun V., Bhattacharya, D., Datta, Bhaskar
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Thampan, A. V, Bhattacharya, D, Datta, B
Kilohertz quasi-periodic oscillations (QPOs) in low-mass X-ray binaries (LMXBs) may represent the orbital frequencies of the innermost Keplerian orbits around accreting neutron stars. Attempts have...
Applications of radio pulsar population synthesis (1999)
Verbunt, F., Hartman, J.W., Bhattacharya, D., Nelemans, G.A.
Improved population synthesis of single radio pulsars with B>= 1011 G confirms that the time scale on which the magnetic field of neutron stars decays is 30 Myr or more. Our simulations suggest that...
Kar, A K, Dhar, A, Ray, S K, Mathur, B K, Bhattacharya, D, Chopra, K L
Thin films of La0.67Ca0.33MnO3 have been deposited at room temperature on LaAlO3(100) substrates by dc magnetron sputtering. The as-deposited films are amorphous and become polycrystalline on...
Optical follow up of the GRB 990123 sources from UPSO, Naini Tal (1999)
Sagar, R., Pandey, A.K., Mohan, V., Yadav, R.K.S., Bhattacharya, D., ...
The CCD magnitudes in Johnson $BV$ and Cousins R photometric passbands are determined for the optical transient of GRB 990123. These observations have been taken approximately 12 hours after trigger...
Applications of radio pulsar population synthesis (1999)
Verbunt, F., Hartman, J.W., Bhattacharya, D., Nelemans, G.
Restricted Access. Pulsar Timing, General Relativity and the Internal Structure of Neutron Stars, Eds. Z. Arzoumanian, F. Van der Hooft, and E. P. J. van den Heuvel. Published by Koninklijke...
Models for the evolution of neutron star magnetic fields (1999)
Restricted Access. Pulsar Timing, General Relativity and the Internal Structure of Neutron Stars, Eds. Z. Arzoumanian, F. Van der Hooft, and E. P. J. van den Heuvel. Published by Koninklijke...
Optical follow up of the GRB 990123 sources from UPSO, Naini Tal (1999)
Sagar, R, Pandey, A. K, Mohan, V, Yadav, R. K. S, Bhattacharya, D, ...
The CCD magnitudes in Johnson $BV$ and Cousins $R$ photometric passbands are determined for the optical transient of GRB 990123. These observations have been taken approximately 12 hours after...
Magnetic and Microstructural Properties of YBa2Cu3O7-x-Ag Composite. (1998)
Sen, D., Bhattacharya, D., Ghatak, S. K., Chopra, K. L.
This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, composite materials, mmc materials and material types:, ag...
Excess Electrical Conductivity and Thermoelectric Power of (YBa2Cu(3.05)O(x))Ag(n) Pellets. (1998)
Dey, T. K., Radha, K., Barik, H. K., Bhattacharya, D., Chopra, K. L.
Subsurface Heating Effects During Pulsed Laser Evaporation of Materials. (1998)
Singh, Rajiv K., Bhattacharya, D., Narayan, J.
The thermal effects of targets evaporated by nanosecond laser pulses have been theoretically and experimentally investigated. Calculations of the subsurface temperatures were higher than the surface...
Thampan, A. V., Bhattacharya, D., Datta, B.
Kilohertz quasi-periodic oscillations (QPOs) in low-mass X-ray binaries (LMXBs) may represent the orbital frequencies of the innermost Keplerian orbits around accreting neutron stars. Attempts have...
Kinematics of low-mass x-ray binaries and millisecond pulsars (1998)
Ramachandran, R., Bhattacharya, D.
Restricted Access.
Detection of radio emission from pulsars: A pulsar observation primer (1998)
Restricted Access.
Hard X-ray Emission from Cassiopeia A SNR (1997)
Leising, M. D., Hartmann, D. H., Kurfess, J. D., Blanco, P., Bhattacharya, D.
We report the results of extracting the hard X-ray continuum spectrum of Cas A SNR from RXTE/PCA Target of Opportunity (TOO) observations and CGRO/OSSE observations. The data can rule out the single...
Kinematics of low-mass X-ray binaries and millisecond pulsars (1997)
Ramachandran, R., Bhattacharya, D.
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A study of the evolution of radio pulsars through improved population synthesis (1997)
Hartman, J.W., Bhattacharya, D., Wijers, R., Verbunt, F.
We simulate the birth and evolution of radio pulsars throughout the Galaxy and their observation in a region around the Sun, using recently derived models for the velocity distribution of neutron...
Modelling the variance of dispersion measures of radio pulsars. (1997)
Nelemans, G., Hartman, J.W., Verbunt, F., Bhattacharya, D.
On the basis of a highly simplified model for small scale structure in the electron density distribution in the Galaxy, we argue that the spread of expectation values for the dispersion measure at...
Magnetic field evolution of accreting neutron stars (1997)
Konar, Sushan, Bhattacharya, D.
Sorry, the full text of this article is not available here. Please click on the alternative location to access it.
A study of the evolution of radio pulsars through improved population synthesis (1997)
Hartman, J.W., Bhattacharya, D., Verbunt, F.
We simulate the birth and evolution of radio pulsars throughout the Galaxy and their observation in a region around the Sun, using recently derived models for the velocity distribution of neutron...
Modelling the variance of dispersion measures of radio pulsars (1997)
Nelemans, G., Hartman, J.W., Verbunt, F., Bhattacharya, D.
On the basis of a highly simplified model for small scale structure in the electron density distribution in the Galaxy, we argue that the spread of expectation values for the dispersion measure at...
Ohmic decay of magnetic flux expelled from neutron star interiors (1996)
Bhattacharya, D., Datta, Bhaskar
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Detection of atmospheric cherenkov radiation using solar heliostat mirrors (1996)
Ong, R.A., Bhattacharya, D., Covault, C.E., Dixon, D.D., Gregorich, D.T., Hanna, D.S., ...
Detection of atmospheric cherenkov radiation using solar heliostat mirrors (1996)
Ong, R.A., Bhattacharya, D., Covault, C.E., Dixon, D.D., Gregorich, D.T., Hanna, D.S., ...
The origin of millisecond pulsars (1996)
Open Access. Pulsars: problems and progressAstronomical Society of the Pacific Conference Series, Vol. 105; Proceedings of the 160th colloquium of the International Astronomical Union held in Sydney;...
The case for no field decay from improved pulsar population studies (1996)
Hartman, J.W., Verbunt, F., Bhattacharya, D., Wijers, H.
Open Access. Pulsars: problems and progressAstronomical Society of the Pacific Conference Series, Vol. 105; Proceedings of the 160th colloquium of the International Astronomical Union held in Sydney;...
The evolution of the magnetic fields of neutron stars (1995)
Diamond jubilee symposium on pulsars,14-17 March 1994, RRI, Bangalore.
A numerical survey of neutron star crustal density profiles (1995)
Datta, Bhaskar, Thampan, Arun V., Bhattacharya, D.
An accurate numerical survey of the density profiles corresponding to the crusts of neutron stars for representative equation of state models is presented. This will find application in calculations...
Evolution of the magnetic fields of neutron stars in low-mass binary systems (1995)
Miri, M. Jahan, Bhattacharya, D.
Proceedings of the 6th Asian-Pacific regional meeting of the IAU, Pune,1993,Ed. V K Kapahi et al. Indian Academy of Sciences,Bangalore, 1995.
Evolution of the magnetic field of an accreting neutron star (1995)
Konar, Sushan, Bhattacharya, D., Urpin, Vadim
Proceedings of the 6th Asian Pacific regional meeting on astronomy of the IAU,Pune, 1993.
Magnetic evolution of neutron stars in wide low-mass binary systems (1994)
Jahan Miri, M., Bhattacharya, D.
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Magnetic evolution of neutron stars in wide low-mass binary systems (1994)
Miri, Jahan M, Bhattacharya, D
The low magnetic field strengths $(\sim 10^8 G)$ of millisecond pulsars could be due either to their progenitor neutron stars being born with such low fields or to a decay of their field strength in...
Magnetic evolution of neutron stars in wide low-mass binary systems (1994)
Miri, Jahan M, Bhattacharya, D
The low magnetic field strengths $(\sim 10^8 G)$ of millisecond pulsars could be due either to their progenitor neutron stars being born with such low fields or to a decay of their field strength in...
Tracking and imaging gamma ray experiment (TIGRE) for 1 to 100 MeV gamma ray astronomy (1994)
Alpar, A., Bhattacharya, D., Buccheri, R., Dotson, K., Forrest, D., Johnson, W. N., ...
Models for the formation of binary and millisecond pulsars (1994)
Open Access. Compact stars in binaries, proceedings from IAU symposium 165 held 15 through 19 August 1994, as part of the 22nd General Assembly of the IAU in The Hague, the Netherlands. Eds. J. van...
A case for no decay of the magnetic fields of isolated radio pulsars (1993)
Verbunt, F., Bhattacharya, D., Hartman, J.M.
Restricted Access.
Accreting white dwarf models for CAL 83, CAL 87 and other ultrasoft X-ray sources in the LMC (1992)
Bhattacharya, D., Nomoto, K., Rappaport, S.A.
The study demonstrates that the ultrasoft X-ray emission observed in the three strong LMC X-ray sources CAL 83, CAL 87, and RXJ 0527.8-6954 can be explained by steady nuclear burning of hydrogen...
On the decay of the magnetic fields of single radio pulsars (1992)
Bhattacharya, D., Hartman, J.W., Verbunt, F.
We investigate the statistical evidence for the decay of the magnetic field of single radio pulsars. We perform population syntheses for different assumed values for the time scale of field decay...
On the decay of the magnetic fields of single radio pulsars (1992)
Bhattacharya, D., Hartman, J.W., Verbunt, F.
We investigate the statistical evidence for the decay of the magnetic field of single radio pulsars. We perform population syntheses for different assumed values for the time scale of field decay...
The evolution of the magnetic fields of neutron stars (1992)
Restricted Access. Magnetospheric Structure and Emission Mechanics of Radio Pulsars, Proceedings of IAU Colloq. 128, held in Lagow, Poland, 17-22 June 1990. Edited by T. H. Hankins, J. M. Rankin, and...
From low-mass X-ray binaries to binary and millisecond pulsars (1992)
Restricted Access.
Formation and evolution of binary and millisecond radio pulsars (1991)
Restricted Access.
Gamma rays from millisecond pulsars. (1991)
Bhattacharya, D., Srinivasan, G.
The contribution of millisecond pulsars to the diffuse gamma-ray background of the Galaxy is estimated, and it is shown that a significant fraction of the Galactic background may originate from them....
Radio pulsars and the scale height of ionized hydrogen (1991)
Some recently advanced models for the decay of the magnetic fields of neutron stars imply that functioning radio pulsars should be present at distances z in excess of 1 kpc from the galactic plane,...
The evolution of neutron star magnetic fields (1991)
Bhattacharya, D., Srinivasan, G.
Restricted Access.
A novel mechanism for the decay of neutron star magnetic fields (1990)
Srinivasan, G., Bhattacharya, D., Muslimov, A.G., Tsygan, A.J.
If the generally accepted picture that the neutrons and protons in the core of a neutron star will be in a (vortex) superfluid state is correct, then the Onsager-Feynman vortices in the neutron...
On the morphology of supernova remnants with pulsars. (1990)
One of the intriguing aspects of supernova remnants is their morphology. While the majority of them look like hollow shells, a few, called plerions, are centrally filled like the Crab nebula, and...
Anantharamaiah, K.R., Payne, H.E., Bhattacharya, D.
Restricted Access. Radio Recombination Lines: 25 Years of Investigation, Proceedings of IAU Colloq. 125, held in Puschino, USSR, September 11-16, 1989. Edited by M. A. Gordon and R. L. Sorochenko....
Thermal field growth in neutron stars - An alternative to injection (1990)
Restricted Access.
On the lifetime of low mass x-ray binaries (1989)
Srinivasan, G., Bhattacharya, D.
It is argued that the measured mass of the binary millisecond pulsar PSR 0021-72A provides a strong evidence that a rapidly spinning neutron star may drastically curtail the X-ray lifetime of a...
On the implications of the submillisecond pulsar in Supernova 1987A (1989)
Bhattacharya, D., Srinivasan, G.
We discuss the implications of the ultra rapid rotation rate of 1968 Hz of the newly discovered pulsar in supernova 1987A, as well as the sinusoidal modulation of the frequency. It is argued that all...
Supernova 1987A - A review (1988)
Supernova 1987A, the first supernova since the time of Kepler to reach naked-eye visibility, was discovered on February 24, 1987, in the Large Magellanic Cloud. This has naturally been of great...
Supernova 1987A - A review (1988)
Supernova 1987A, the first supernova since the time of Kepler to reach naked-eye visibility, was discovered on February 24, 1987, in the Large Magellanic Cloud. This has naturally been of great...
Evolution of the morphology of supernova remnants with pulsars (1988)
Srinivasan, G., Bhattacharya, D.
Restricted Access.
The progenitors of pulsars (1987)
Srinivasan, G., Bhattacharya, D.
Open Access. The origin and evolution of neutron stars; Proceedings of the IAU Symposium, Nanjing, People's Republic of China, May 26-30, 1986 (A88-28476 10-90). Dordrecht, D. Reidel Publishing Co.,...
On the association between supernova remnants and pulsars (1987)
Bhattacharya, D., Srinivasan, G.
Restricted Access.
Ionized Gas towards Galactic Centre-Constraints from Low-Frequency Recombination Lines (1986)
Anantharamaiah, KR, Bhattacharya, D
Observations of the H272α recombination line towards the galactic centre show features near VLSR= 0, -50 and + 36 kms-1 . We have combined the parameters of these features with the available -166...
On the implication of the recently discovered 5 millisecond binary pulsar PSR 1855+09 (1986)
Bhattacharya, D., Srinivasan, G.
We argue that the extraordinary fact that all three known millisecond pulsars are very close to the galactic plane implies that there must be ~100 potentially observable millisecond pulsars within ~...
Ionized gas towards the Galactic centre - constraints from low-frequency recombination lines (1986)
Anantharamaiah, K.R., Bhattacharya, D.
Observations of the H272 alpha recombination line towards the Galactic center show features near V(LSR) = 0, -50 and +36 km/s. The parameters of these features are combined with the available H166...
Has the Crab Pulsar magnetic field grown after its birth? (1985)
Bhattacharya, D., Shukre, C.S.
The evolution of rotation period and spindown age of a pulsar whose surface magnetic field undergoes a phase of growth were investigated. Application of these results to the Crab pulsar strongly...
On the nature of the supernova remnant O540-69.3 in the large magellanic cloud (1985)
Bhattacharya, D., Srinivasan, G.
Open Access.
Has the Crab Pulsar Magnetic-Field Grown After its Birth (1985)
We investigate the evolution of rotation period and spindown age of a pulsar whose surface magnetic field undergoes a phase of growth. Application of these results to the Crab pulsar strongly...
On the nature of the Supernova Remnant 0540-69.3 in the large Magellanic cloud (1984)
Srinivasan, G., Bhattacharya, D.
The implications of the recently discovered x-ray pulsar within the SNR 054069.3 in the Large Magellanic Cloud is investigated. It is suggested that the SNR is a.shell-plerion combination.
On the supernova remnants produced by pulsars. (1984)
Srinivasan, G., Bhattacharya, D., Dwarakanath, K.S.
It is concluded that pulsar-driven supernova remnants (SNRs) are extremely rare objects. Indeed, an analysis of the known sample of plerions suggests a very low birthrate (about 1 in 240 years)....
Improved analysis of COMPTEL solar neutron data, with application to the 15 June 1991 flare
Toner, M.P., Ryan, J.M., MacKinnon, A.L., Bhattacharya, D., Macpherson, K.P., McConnell, M.L., ...
Direct solar flare neutrons are a valuable diagnostic of high- energy ion acceleration in these events, and COMPTEL improves over all previous cosmic neutron detectors in its capacity for neutron...
Bhattacharya, D, Surek, B, Rüsing, M, Damberger, S, Melkonian, M
Group I introns are found in organellar genomes, in the genomes of eubacteria and phages, and in nuclear-encoded rRNAs. The origin and distribution of nuclear-encoded rRNA group I introns are not...
Bhattacharya, D, Dhar, T K, Ali, E
A microtiter plate-based enzyme immunoassay has been developed for phaseolinone, a phytotoxin isolated from the culture filtrate of the plant-pathogenic fungus Macrophomina phaseolina (Tassi) Goid....
Ahern, C A, Bhattacharya, D, Mortenson, L, Coronado, R
We conducted a deletion analysis of two regions identified in the II-III loop of alpha(1S), residues 671-690, which were shown to bind to ryanodine receptor type 1 (RyR1) and stimulate RyR1 channels...
Bhattacharya, D, Surek, B, Rüsing, M, Damberger, S, Melkonian, M
Group I introns are found in organellar genomes, in the genomes of eubacteria and phages, and in nuclear-encoded rRNAs. The origin and distribution of nuclear-encoded rRNA group I introns are not...
Bhattacharya, D, Dhar, T K, Ali, E
A microtiter plate-based enzyme immunoassay has been developed for phaseolinone, a phytotoxin isolated from the culture filtrate of the plant-pathogenic fungus Macrophomina phaseolina (Tassi) Goid....
Ahern, C A, Bhattacharya, D, Mortenson, L, Coronado, R
We conducted a deletion analysis of two regions identified in the II-III loop of alpha(1S), residues 671-690, which were shown to bind to ryanodine receptor type 1 (RyR1) and stimulate RyR1 channels...
Improved analysis of COMPTEL solar neutron data, with application to the 15 June 1991 flare
Toner, M.P., Ryan, J.M., MacKinnon, A.L., Bhattacharya, D., Macpherson, K.P., McConnell, M.L., ...
Direct solar flare neutrons are a valuable diagnostic of high- energy ion acceleration in these events, and COMPTEL improves over all previous cosmic neutron detectors in its capacity for neutron...
Leech Bite: A Rare Gynecologic Emergency
Saha, P.K., Roy, S., Bhattacharya, D., Mukherjee, P., Naskar, T., Bhuiya, A.
Vaginal bleeding as the result of a leech bite is a rare occurrence. We report 2 cases of vaginal bleeding in young girls that resulted from a leech bite and required treatment. Clinical presentation...
On constrained estimation problems in time-use surveys
Samaniego, F.J., Vestrup, E.M., Bhattacharya, D.
In the context of "stylized" time-use surveys, constrained estimation problems are common, a simple illustration being the constraint that the hours reported for a mutually exclusive and exhaustive...
Process modelling and industrial energy use in developing countries--The steel industry in India
Anandalingam, G., Bhattacharya, D.
A process model is used to study energy use and conservation in the steel industry in India. Production is modelled by a set of inter-connected process activities, each of which defines unique...
Kukreti, Himani, Dash, Paban Kumar, Parida, Manmohan, Chaudhary, Artee, Saxena, Parag, Rautela, RS, ...
Bhattacharya, D., Redkar, A., Mittra, I., Sutaria, U., MacRae, K. D.
Although cancer of the cervix is traditionally considered not to be responsive to steroid hormones, an in vitro study has reported that the addition of oestrogen increased cellular proliferation in a...