Type II-P Supernovae from the SDSS-II Supernova Survey and the Standardized Candle Method (2009)
D'Andrea, Chris B., Sako, Masao, Dilday, Benjamin, Frieman, Joshua A., Holtzman, Jon, Kessler, Richard, ...
We apply the Standardized Candle Method (SCM) for Type II Plateau supernovae (SNe II-P), which relates the velocity of the ejecta of a SN to its luminosity during the plateau, to 15 SNe II-P...
Kessler, Richard, Becker, Andrew, Cinabro, David, Vanderplas, Jake, Frieman, Joshua A., Marriner, John, ...
We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital Sky Survey-II...
The Sloan Digital Sky Survey-II: Photometry and Supernova Ia Light Curves from the 2005 data (2009)
Holtzman, Jon A., Marriner, John, Kessler, Richard, Sako, Masao, Dilday, Ben, Frieman, Joshua A., ...
We present ugriz light curves for 146 spectroscopically confirmed or spectroscopically probable Type Ia supernovae from the 2005 season of the SDSS-II Supernova survey. The light curves have been...
SNANA: A Public Software Package for Supernova Analysis (2009)
Kessler, Richard, Bernstein, Joseph P., Cinabro, David, Dilday, Benjamin, Frieman, Joshua A., Jha, Saurabh, ...
We describe a general analysis package for supernova (SN) light curves, called SNANA, that contains a simulation, light curve fitter, and cosmology fitter. The software is designed with the primary...
CfA3: 185 Type Ia Supernova Light Curves from the CfA (2009)
Hicken, Malcolm, Challis, Peter, Jha, Saurabh, Kirshner, Robert P., Matheson, Tom, Modjaz, Maryam, ...
We present multi-band photometry of 185 type-Ia supernovae (SN Ia), with over 11500 observations. These were acquired between 2001 and 2008 at the F. L. Whipple Observatory of the Harvard-Smithsonian...
Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves (2009)
Hicken, Malcolm, Wood-Vasey, W. Michael, Blondin, Stephane, Challis, Peter, Jha, Saurabh, Kelly, Patrick L., ...
We combine the CfA3 supernova Type Ia (SN Ia) sample with samples from the literature to calculate improved constraints on the dark energy equation of state parameter, w. The CfA3 sample is added to...
Dilday, Benjamin, Kessler, Richard, Frieman, Joshua, Holtzman, Jon, Marriner, John, Miknaitis, Gajus, ...
Also archived in: arXiv:0801.3297 v3 Jul 21 2008
Two more candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Survey (2008)
Anderson, Scott, Becker, Andrew, Haggard, Daryl, Prieto, Jose Luis, Knapp, Gillian, Sako, Masao, ...
Also archived in: arXiv:0802.2240 v1 Feb 15 2008
First-Year spectroscopy for the SDSS-II Supernova Survey (2008)
Zheng, Chen, Romani, Roger, Sako, Masao, Marriner, John, Bassett, Bruce, Becker, Andrew, ...
Also archived in: arXiv:0802.3220 v1 Feb 21 2008
First-Year Spectroscopy for the SDSS-II Supernova Survey (2008)
Zheng, Chen, Romani, Roger W., Sako, Masao, Marriner, John, Bassett, Bruce, Becker, Andrew, ...
This paper presents spectroscopy of supernovae discovered in the first season of the Sloan Digital Sky Survey-II Supernova Survey. This program searches for and measures multi-band light curves of...
The Sloan Digital Sky Survey-II Supernova Survey: search Algorithm and follow-up observations (2008)
Sako, Masao, Bassett, Bruce, Becker, Andrew, Cinabro, David, DeJongh, Fritz, Depoy, Darren, ...
Also archived in: arXiv:0708.2750 v2 Oct 19 2007
The Sloan Digital Sky Survey-II Supernova Survey: technical summary (2008)
Frieman, Joshua, Bassett, Bruce, Becker, Andrew, Choi, Changsu, Cinabro, David, DeJongh, Fritz, ...
Also archived in: arXiv:0708.2749 v1 Aug 21 2007
The sloan digital sky survey-II supernova survey: technical summary (2008)
Frieman, Joshua A., Bassett, Bruce, Becker, Andrew, Choi, Changsu, Cinabro, David, DeJongh, Fritz, ...
First-year spectroscopy for the sloan digital sky survey - II. Supernova survey (2008)
Zheng, Chen, Romani, Roger W., Sako, Masao, Marriner, John, Bassett, Bruce, Becker, Andrew, ...
Saurabh Jha, Peter M. Garnavich, Robert P. Kirshner, Peter Challis, Alicia M. Soderberg, Lucas M. Macri, ...
We present optical and near-infrared photometry and spectroscopy of the Type Ia SN 1998bu in the Leo I Group galaxy M96 (NGC 3368). The data set consists of 356 photometric measurements and 29...
mpahre=cfa.harvard.edu, mgarcia=cfa.harvard.edu, aszentgyorgyi=cfa.harvard.edu AND (2007)
Peter M. Garnavich, Saurabh Jha, Michael A. Pahre, Krzysztof Z. Stanek, Robert P. Kirshner, Michael R. Garcia, ...
We present near-infrared and optical observations of the afterglow to the gamma-ray burst 991216 obtained with the Fred L. Whipple Observatory 1.2 m telescope and the University of Hawaii 2.2 m...
High-resolution spectroscopic follow-up of OGLE planetary (2007)
Transit Candidates In, Maciej Konacki, Guillermo Torres, Dimitar D. Sasselov, Saurabh Jha
We report the results of our campaign to follow-up spectroscopically several candidate extrasolar transiting planets from the OGLE-III survey in the direction of the Galactic center, announced in...
New Data and Improved Parameters for the Transiting Planet OGLE-TR-56b (2007)
Guillermo Torres, Maciej Konacki, Dimitar D. Sasselov, Saurabh Jha
We report new spectroscopic observations of the recently discovered transiting planet OGLE-TR-56b with the Keck/HIRES instrument. Our radial velocity measurements with errors of 100 m s 1 show clear...
The peculiar SN 2005hk: Do some type Ia supernovae explode as deflagrations? (2007)
Phillips, M. M., Li, Weidong, Frieman, Joshua A., Blinnikov, S. I., DePoy, Darren, Prieto, José L., ...
The peculiar SN 2005hk: Do some type ia supernovae explode as deflagrations? (2007)
Phillips, M. M., Li, Weidong, Frieman, Joshua A., Blinnikov, S. I., DePoy, Darren, Prietro, Jose L., ...
Publicación ISI
The peculiar SN 2005hk: Do some type ia supernovae explode as deflagrations? (2007)
Phillips, M. M., Li, Weidong, Frieman, Joshua A., Blinnikov, S. I., DePoy, Darren, Prietro, Jose L., ...
Publicación ISI
Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2 (2006)
Jha, Saurabh, Riess, Adam G., Kirshner, Robert P.
We present an updated version of the Multicolor Light Curve Shape method to measure distances to type Ia supernovae (SN Ia), incorporating new procedures for K-correction and extinction corrections....
The Velocity Field of the Local Universe from Measurements of Type Ia Supernovae (2006)
Haugboelle, Troels, Hannestad, Steen, Thomsen, Bjarne, Fynbo, Johan, Sollerman, Jesper, Jha, Saurabh
We present a measurement of the velocity flow of the local universe relative to the CMB rest frame, based on the Jha, Riess & Kirshner (2007) sample of 133 low redshift type Ia supernovae. At a depth...
Riess, Adam G., Strolger, Louis-Gregory, Casertano, Stefano, Ferguson, Henry C., Mobasher, Bahram, Gold, Ben, ...
We have discovered 21 new Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to trace the history of cosmic expansion over the last 10 billion years. These objects,...
Spectropolarimetry of the Peculiar Type Ia SN 2005hk (2006)
Chornock, Ryan, Filippenko, Alexei V., Branch, David, Foley, Ryan J., Jha, Saurabh, Li, Weidong
We present Keck spectropolarimetry of the unusual type Ia supernova (SN Ia) 2005hk several days before maximum light. An analysis of the high signal-to-noise-ratio total-flux spectrum shows the...
Late-Time Spectroscopy of SN 2002cx: The Prototype of a New Subclass of Type Ia Supernovae (2006)
Jha, Saurabh, Branch, David, Chornock, Ryan, Foley, Ryan J., Li, Weidong, Swift, Brandon J., ...
We present Keck optical spectra of SN 2002cx, the most peculiar known Type Ia supernova (SN Ia), taken 227 and 277 days past maximum light. Astonishingly, the spectra are not dominated by the...
Using Line Profiles to Test the Fraternity of Type Ia Supernovae at High and Low Redshifts (2006)
Blondin, Stéphane, Dessart, Luc, Leibundgut, Bruno, Branch, David, Höflich, Peter, Tonry, John L., ...
Using archival data of low-redshift (z < 0.01; Center for Astrophysics and SUSPECT databases) Type Ia supernovae (SNe Ia) and recent observations of high-redshift (0.16 < z < 0.64) SNe Ia, we study...
Using Line Profiles to Test the Fraternity of Type Ia Supernovae at High and Low Redshifts (2006)
Blondin, Stéphane, Dessart, Luc, Leibundgut, Bruno, Branch, David, Höflich, Peter, Tonry, John L., ...
Using archival data of low-redshift (z < 0.01; Center for Astrophysics and SUSPECT databases) Type Ia supernovae (SNe Ia) and recent observations of high-redshift (0.16 < z < 0.64) SNe Ia, we study...
Clocchiatti, Alejandro, Schmidt, Brian P., Filippenko, Alexei V., Challis, Peter, Coil, Alison L., Covarrubias, R., ...
We present observations of the Type I Supernovae (SNe) 1999M, 1999N, 1999Q, 1999S, and 1999U, at redshiftz z ≈ 0.5. They were discovered in early 1999 with the 4.0 m Blanco telescope at Cerro...
Clocchiatti, Alejandro, Schmidt, Brian P., Filippenko, Alexei V., Challis, Peter, Coil, Alison L., Covarrubias, R., ...
We present observations of the Type I Supernovae (SNe) 1999M, 1999N, 1999Q, 1999S, and 1999U, at redshiftz z ≈ 0.5. They were discovered in early 1999 with the 4.0 m Blanco telescope at Cerro...
Supernova Cosmology and the ESSENCE project (2005)
Sollerman, Jesper, Aguilera, Claudio, Becker, Andy, Blondin, Stephane, Challis, Pete, Clocchiatti, Alejandro, ...
The proper usage of Type Ia supernovae (SNe Ia) as distance indicators has revolutionized cosmology, and added a new dominant component to the energy density of the Universe, dark energy. Following...
UBVRI Light Curves of 44 Type Ia Supernovae (2005)
Jha, Saurabh, Kirshner, Robert P., Challis, Peter, Garnavich, Peter M., Matheson, Thomas
We present UBVRI photometry of 44 type-Ia supernovae (SN Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the Harvard-Smithsonian...
Li, Weidong, Van Dyk, Schuyler D., Filippenko, Alexei V., Cuillandre, Jean-Charles, Jha, Saurabh, Bloom, Joshua S., ...
The stars that end their lives as supernovae (SNe) have been directly observed in only a handful of cases, due mainly to the extreme difficulty in identifying them in images obtained prior to the SN...
The Calibration of the Swift/UVOT Optical Observations: A Recipe for Photometry (2005)
Li, Weidong, Jha, Saurabh, Filippenko, Alexei V., Bloom, Joshua S., Pooley, David, Foley, Ryan J., ...
Swift/UVOT has the capability to provide critical insight into the physics of the early afterglows of gamma-ray bursts (GRBs). But without precise calibration of the UVOT to standard photometric...
Riess, Adam G., Li, Weidong, Stetson, Peter B., Filippenko, Alexei V., Jha, Saurabh, Kirshner, Robert P., ...
We report observations of two nearby Type Ia supernovae (SNe Ia) for which observations of Cepheid variables in the host galaxies have been obtained with the Hubble Space Telescope: SN 1994ae in NGC...
A transiting extrasolar giant planet around the star OGLE-TR-10 (2004)
Konacki, Maciej, Torres, Guillermo, Sasselov, Dimitar D., Jha, Saurabh
We report a transiting extrasolar giant planet around the star OGLE-TR-10 (orbital period = 3.1 days), which was uncovered as a candidate by the OGLE team in their photometric survey towards the...
Testing blend scenarios for extrasolar transiting planet candidates. II. -- OGLE-TR-56 (2004)
Torres, Guillermo, Konacki, Maciej, Sasselov, Dimitar D., Jha, Saurabh
We re-examine the photometric and spectroscopic evidence available for the star OGLE-TR-56, recently discovered to harbor a giant planet presenting transits and orbiting with a period of 1.21 days....
Fransson, Claes, Challis, Peter M., Chevalier, Roger A., Filippenko, Alexei V., Kirshner, Robert P., Kozma, Cecilia, ...
Ground-based and Hubble Space Telescope observations are presented for SN 1993J and SN 1998S. SN 1998S shows strong, relatively narrow circumstellar emission lines of N III-V and C III-IV, as well as...
Torres, Guillermo, Konacki, Maciej, Sasselov, Dimitar D., Jha, Saurabh
We report high-resolution spectroscopic follow-up observations of the faint transiting planet candidate OGLE-TR-33 (V = 14.7), located in the direction of the Galactic center. Small changes in the...
Torres, Guillermo, Konacki, Maciej, Sasselov, Dimitar D., Jha, Saurabh
In early 2003 our team announced the discovery of the second extrasolar transiting planet, around the faint star OGLE-TR-56 (V = 16.6), based on the detection of small changes in the radial velocity...
A transiting extrasolar giant planet around the star OGLE-TR-113 (2004)
Konacki, Maciej, Torres, Guillermo, Sasselov, Dimitar D., Pietrzynski, Grzegorz, Udalski, Andrzej, Jha, Saurabh, ...
We report the independent discovery of a new extrasolar transiting planet around OGLE-TR-113, a candidate star from the Optical Gravitational Lensing Experiment. Small radial-velocity variations have...
Riess, Adam G., Strolger, Louis-Gregory, Tonry, John, Casertano, Stefano, Ferguson, Henry C., Mobasher, Bahram, ...
We have discovered 16 Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to provide the first conclusive evidence for cosmic deceleration that preceded the current...
23 High Redshift Supernovae from the IfA Deep Survey: Doubling the SN Sample at z>0.7 (2003)
Barris, Brian J., Tonry, John, Blondin, Stephane, Challis, Peter, Chornock, Ryan, Clocchiatti, Alejandro, ...
We present photometric and spectroscopic observations of 23 high redshift supernovae spanning a range of z=0.34-1.03, 9 of which are unambiguously classified as Type Ia. These supernovae were...
Imaging and Demography of the Host Galaxies of High-Redshift Type Ia Supernovae (2003)
Williams, Benjamin F., Hogan, Craig J., Barris, Brian, Candia, Pablo, Challis, Peter, Clocchiatti, Alejandro, ...
We present the results of a study of the host galaxies of high redshift Type Ia supernovae (SNe Ia). We provide a catalog of 18 hosts of SNe Ia observed with the Hubble Space Telescope (HST) by the...
New Data and Improved Parameters for the Transiting Planet OGLE-TR-56b (2003)
Torres, Guillermo, Konacki, Maciej, Sasselov, Dimitar D., Jha, Saurabh
We report new spectroscopic observations of the recently discovered transiting planet OGLE-TR-56b with the Keck/HIRES instrument. Our radial velocity measurements with errors of ~100 m/s show clear...
Konacki, Maciej, Torres, Guillermo, Sasselov, Dimitar D., Jha, Saurabh
We report the results of our campaign to follow-up spectroscopically several candidate extrasolar transiting planets from the OGLE-III survey in the direction of the Galactic center, announced in...
Li, Weidong, Filippenko, Alexei V., Chornock, Ryan, Jha, Saurabh
We present the technical details of the gamma-ray burst (GRB) alert system of the Katzman Automatic Imaging Telescope (KAIT) at Lick Observatory, and the successful observations of the GRB 020813...
Cosmological Results from High-z Supernovae (2003)
Tonry, John L., Schmidt, Brian P., Barris, Brian, Candia, Pablo, Challis, Peter, Clocchiatti, Alejandro, ...
The High-z Supernova Search Team has discovered and observed 8 new supernovae in the redshift interval z=0.3-1.2. These independent observations, confirm the result of Riess et al. (1998a) and...
The Early Light Curve of the Optical Afterglow of GRB 021211 (2003)
Li, Weidong, Filippenko, Alexei V., Chornock, Ryan, Jha, Saurabh
The Katzman Automatic Imaging Telescope (KAIT) at Lick Observatory observed GRB 021211 starting 105 s after the burst, among the earliest observations of an optical afterglow to date. Our...
SN 2002cx: The Most Peculiar Known Type Ia Supernova (2003)
Li, Weidong, Filippenko, Alexei V., Chornock, Ryan, Berger, Edo, Berlind, Perry, Calkins, Michael L., ...
We present photometric and spectroscopic observations of supernova (SN) 2002cx, which reveal it to be unique among all observed type Ia supernovae (SNe Ia). SN 2002cx exhibits a SN 1991T-like...
Leonard, Douglas C., Filippenko, Alexei V., Li, Weidong, Matheson, Thomas, Kirshner, Robert P., Chornock, Ryan, ...
We present optical spectra and photometry sampling the first six months after discovery of supernova (SN) 1999gi in NGC 3184. SN 1999gi is shown to be a Type II-plateau event with a photometric...
The Optical Afterglow of GRB 011211 (2002)
Holland, Stephen T., Soszynski, I., Gladders, Michael D., Barrientos, L. F., Berlind, P., Bersier, David, ...
We present early-time optical photometry and spectroscopy of the optical afterglow of the gamma-ray burst GRB 011211. The spectrum of the optical afterglow contains several narrow metal lines which...
The Luminosity of SN 1999by in NGC 2841 and the Nature of `Peculiar' Type Ia Supernovae (2001)
Garnavich, Peter M., Bonanos, Alceste Z., Krisciunas, Kevin, Jha, Saurabh, Kirshner, Robert P., Schlegel, Eric M., ...
We present UBVRIJHK photometry and optical spectroscopy of the so-called 'peculiar' Type Ia supernova 1999by in NGC 2841. The observations began one week before visual maximum light which is...
The Redshift of the Optical Transient Associated with GRB 010222 (2001)
Jha, Saurabh, Pahre, Michael A., Garnavich, Peter M., Calkins, Michael L., Kilgard, Roy E., Matheson, Thomas, ...
The gamma-ray burst (GRB) 010222 is the brightest GRB detected to date by the BeppoSAX satellite. Prompt identification of the associated optical transient (OT) allowed for spectroscopy with the...
Testing Cosmic Acceleration with Type Ia Supernovae (2001)
We discuss recent evidence for an accelerating Universe from measurements of type Ia supernovae at high redshift, and describe tests of various systematic effects such as extinction and evolution...
Optical Spectra of Type Ia Supernovae at z=0.46 and z=1.2 (2000)
Coil, Alison L., Matheson, Thomas, Filippenko, Alexei V., Leonard, Douglas C., Tonry, John, Riess, Adam G., ...
We present optical spectra, obtained with the Keck 10-m telescope, of two high-redshift type Ia supernovae (SNe Ia) discovered by the High-z Supernova Search Team: SN 1999ff at z=0.455 and SN 1999fv...
Multicolor Observations of a Planetary Transit of HD 209458 (2000)
Jha, Saurabh, Charbonneau, David, Garnavich, Peter M., Sullivan, Denis J., Sullivan, Tiri, Brown, Timothy M., ...
We present B, V, R, I and Z-band photometric observations of HD 209458 during the transit by its planetary companion on UT 1999 November 15 with the University of Hawaii 0.6m and 2.2m telescopes and...
Jha, Saurabh, Torres, Guillermo, Stefanik, Robert P., Latham, David W., Mazeh, Tsevi
The triple-lined spectroscopic triple system HD 109648 has one of the shortest periods known for the outer orbit in a late-type triple, 120.5 days, and the ratio between the periods of the outer and...
Riess, Adam G., Filippenko, Alexei V., Liu, Michael C., Challis, Peter, Clocchiatti, Alejandro, Diercks, Alan, ...
We have measured the rest-frame B,V, and I-band light curves of a high-redshift type Ia supernova (SN Ia), SN 1999Q (z=0.46), using HST and ground-based near-infrared detectors. A goal of this study...
An Upper Limit on the Reflected Light from the Planet Orbiting the Star tau Bootis (1999)
Charbonneau, David, Noyes, Robert W., Korzennik, Sylvain G., Nisenson, Peter, Jha, Saurabh, Vogt, Steven S., ...
The planet orbiting tau Boo at a separation of 0.046 AU could produce a reflected light flux as bright as 1e-4 relative to that of the star. A spectrum of the system will contain a reflected light...
BVRI Light Curves for 22 Type Ia Supernovae (1998)
Riess, Adam G., Kirshner, Robert P., Schmidt, Brian P., Jha, Saurabh, Challis, Peter, Garnavich, Peter M., ...
We present 1210 Johnson/Cousins B,V,R, and I photometric observations of 22 recent type Ia supernovae (SNe Ia): SN 1993ac, SN 1993ae, SN 1994M, SN 1994S, SN 1994T, SN 1994Q, SN 1994ae, SN 1995D, SN...
Spectral Line Distortions in the Presence of a Close-In Planet (1998)
Charbonneau, David, Jha, Saurabh, Noyes, Robert W.
We discuss the interpretation of distortions to stellar spectral lines with particular attention to line bisectors in the presence of an orbiting planetary companion. We present a simple model...
Riess, Adam G., Filippenko, Alexei V., Challis, Peter, Clocchiattia, Alejandro, Diercks, Alan, Garnavich, Peter M., ...
We present observations of 10 type Ia supernovae (SNe Ia) between 0.16 < z < 0.62. With previous data from our High-Z Supernova Search Team, this expanded set of 16 high-redshift supernovae and 34...
HD109648 :--hints of orbital evolution in a hierarchical triple system? /--Saurabh Jha. (1996)
Thesis (B.A.)--Harvard University, 1996.
Jha, Saurabh, Calvert, John W., Duranski, Mark R., Ramachandran, Arun, Lefer, David J.
Hydrogen sulfide (H2S) is an endogenously produced gaseous signaling molecule with diverse physiological activity. The potential protective effects of H2S have not been evaluated in the liver. The...