Folatelli, Gaston, Phillips, M. M., Burns, Christopher R., Contreras, Carlos, Hamuy, Mario, Freedman, W. L., ...
We present the analysis of the first set of low-redshift Type Ia supernovae (SNe Ia) by the Carnegie Supernova Project. Well-sampled, high-precision optical (ugriBV) and near-infrared (NIR; YJHKs)...
Contreras, Carlos, Hamuy, Mario, Phillips, M. M., Folatelli, Gaston, Suntzeff, Nicholas B., Persson, S. E., ...
The Carnegie Supernova Project (CSP) is a five-year survey being carried out at the Las Campanas Observatory to obtain high-quality light curves of ~100 low-redshift Type Ia supernovae in a...
Krisciunas, Kevin, Marion, G. H., Suntzeff, Nicholas B., Blanc, Guillaume, Bufano, Filomena, Candia, Pablo, ...
We obtained optical photometry of SN 2003gs on 49 nights, from 2 to 494 days after T(B_max). We also obtained near-IR photometry on 21 nights. SN 2003gs was the first fast declining Type Ia SN that...
SN 2003bg: The First Type IIb Hypernova (2009)
Hamuy, Mario, Deng, Jinsong, Mazzali, Paolo A., Morrell, Nidia I., Phillips, Mark M., Roth, Miguel, ...
Optical and near-infrared photometry and optical spectroscopy are reported for SN 2003bg, starting a few days after explosion and extending for a period of more than 300 days. Our early-time spectra...
The He-rich core-collapse supernova 2007Y: observations from x-ray to radio wavelengths (2009)
Stritzinger, Maximilian, Mazzali, P., Phillips, Mark M., Immler, Stefan, Soderberg, Alicia, Sollerman, Jesper, ...
A detailed study spanning approximately a year has been conducted on the Type Ib supernova (SN) 2007Y. Imaging was obtained from X-ray to radio wavelengths, and a comprehensive set of multi-band...
The He-rich core-collapse supernova 2007Y: Observations from X-ray to Radio Wavelengths (2009)
Stritzinger, Maximilian, Mazzali, Paolo, Phillips, Mark M., Immler, Stefan, Soderberg, Alicia, Sollerman, Jesper, ...
A detailed study spanning approximately a year has been conducted on the Type Ib supernova 2007Y. Imaging was obtained from X-ray to radio wavelengths, and a comprehensive set of multi-band...
The He-rich core-collapse supernova 2007Y: observations from X-ray to radio wavelengths (2009)
Stritzinger, Maximilian, Mazzali, Paolo, Phillips, Mark M., Immler, Stefan, Soderberg, Alicia, Sollerman, Jesper, ...
Supernova 2003bg: the first type IIb hypernova (2009)
Hamuy, Mario, Deng, Jinsong, Mazzali, Paolo A., Morrell, Nidia I., Phillips, Mark M., Roth, Miguel, ...
Krisciunas, Kevin, Hamuy, Mario, Suntzeff, Nicholas B., Espinoza, Juan, Gonzalez, David, Gonzalez, Luis, ...
We present infrared photometry of SN 1999em, plus optical photometry, infrared photometry, and optical spectroscopy of SN 2003hn. Both objects were Type II-P supernovae. The V-[RIJHK] color curves of...
Late-Time HST Photometry of SN 1994I: Hints of Positron Annihilation Energy Deposition (2008)
Clocchiatti, Alejandro, Wheeler, J. Craig, Kirshner, Robert P., Branch, David, Challis, Peter, Chevalier, Roger A., ...
We present multicolor Hubble Space Telescope (HST) WFPC2 broadband observations of the Type Ic SN 1994I obtained approximately 280 days after maximum light. We measure the brightness of the SN and,...
Improved cosmological constraints from new, old, and combined supernova data sets (2008)
Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., ...
We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This...
Improved cosmological constraints from new, old, and combined supernova data sets (2008)
Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., ...
We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This...
Wang, Xiaofeng, Li, Weidong, Filippenko, Alexei V., Krisciunas, Kevin, Suntzeff, Nicholas B., Li, Junzheng, ...
We present extensive optical (UBVRI), near-infrared (JK) light curves and optical spectroscopy of the Type Ia supernova (SN) 2006X in the nearby galaxy NGC 4321 (M100). Our observations suggest that...
Optical Sky Brightness at Cerro Tololo Inter-American Observatory from 1992 to 2006 (2007)
Krisciunas, Kevin, Semler, Dylan R., Richards, Joseph, Schwarz, Hugo E., Suntzeff, Nicholas B., Vera, Sergio, ...
We present optical UBVRI sky brightness measures from 1992 through 2006. The data are based on CCD imagery obtained with the CTIO 0.9-m, 1.3-m, and 1.5-m telescopes. The B- and V-band data are in...
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
Photometric Calibration of the DES (2006)
Tucker, Douglas L., Annis, James T., Lin, Huan, Kent, Stephen, Stoughton, Chris, Peoples, John, ...
The Dark Energy Survey (DES) is a 5000 sq deg griz imaging survey to be conducted using a proposed 3 sq deg (2.2deg-diameter) wide-field mosaic camera on the CTIO Blanco 4m telescope. The primary...
Report of the Dark Energy Task Force (2006)
Albrecht, Andreas, Bernstein, Gary, Cahn, Robert, Freedman, Wendy L., Hewitt, Jacqueline, Hu, Wayne, ...
Dark energy appears to be the dominant component of the physical Universe, yet there is no persuasive theoretical explanation for its existence or magnitude. The acceleration of the Universe is,...
Krisciunas, Kevin, Garnavich, Peter M., Stanishev, Vallery, Suntzeff, Nicholas B., Prieto, Jose Luis, Espinoza, Juan, ...
We present optical (UBVRI) and near-infrared (YJHK) photometry of the normal Type Ia supernova 2004S. We also present eight optical spectra and one near-IR spectrum of SN 2004S. The light curves and...
Lightcurves of Type Ia Supernovae from Near the Time of Explosion (2006)
Garg, Arti, Stubbs, Christopher W., Challis, Peter, Wood-Vasey, W. Michael, Blondin, Stephane, Huber, Mark E., ...
We present a set of 11 type Ia supernova (SN Ia) lightcurves with dense, pre-maximum sampling. These supernovae (SNe), in galaxies behind the Large Magellanic Cloud (LMC), were discovered by the...
SN 2005bf: A Possible Transition Event Between Type Ib/c Supernovae and Gamma Ray Bursts (2006)
Folatelli, Gaston, Contreras, Carlos, Phillips, M. M., Woosley, S. E., Blinnikov, Sergei, Morrell, Nidia, ...
We present u'g'r'i'BV photometry and optical spectroscopy of the Type Ib/Ic SN 2005bf covering the first ~100 days following discovery. The u'g'BV light curves displayed a double-peaked morphology,...
Sn 2005bf: A possible transition event between type Ib/c supernovae and gamma-ray bursts (2006)
Folatelli, Gastón, Contreras, Carlos, Phillips, M. M., Woosley, S. E., Blinnikov, Sergei, Morrell, Nidia, ...
We present u'g'r'i'BV photometry and optical spectroscopy of the Type Ib/Ic SN 2005bf covering the first similar to 100 days following discovery. The u'g'BV light curves displayed an unprecedented...
A New Method to Calibrate the Magnitudes of Type Ia Supernovae at Maximum Light (2006)
Prieto, Jose Luis, Rest, Armin, Suntzeff, Nicholas B.
We present a new empirical method for fitting multicolor light curves of Type Ia supernovae. Our method combines elements from two widely used techniques in the literature: the delta_m15 template...
Optical and Near-Infrared Observations of the Peculiar Type Ia Supernova 1999ac (2006)
Phillips, Mark M., Krisciunas, Kevin, Suntzeff, Nicholas B., Abraham, R. G., Beckett, M. G., Bonati, M., ...
We present 39 nights of optical photometry, 34 nights of infrared photometry, and 4 nights of optical spectroscopy of the Type Ia SN 1999ac. This supernova was discovered two weeks before maximum...
SN 1987A After 18 Years: Mid-Infrared GEMINI and SPITZER Observations of the Remnant (2006)
Bouchet, Patrice, Dwek, Eli, Danziger, I. John, Arendt, Richard G., Park, Sangwook, ...
We present high resolution 11.7 and 18.3um mid-IR images of SN 1987A obtained on day 6526 with T-ReCS attached to the Gemini telescope. The 11.7um flux has increased significantly since our last...
The Carnegie Supernova Project: The low-redshift survey (2006)
Hamuy, Mario, Folatelli, Gastón, Morrell, Nidia I., Phillips, Mark M., Suntzeff, Nicholas B., Persson, S. E., ...
Supernovae are essential to understanding the chemical evolution of the universe. Type Ia supernovae also provide the most powerful observational tool currently available for studying the expansion...
SN 2005bf: a possible transition event between type Ib/c supernovae and gamma-ray bursts (2006)
Folatelli, Gastón, Contreras, Carlos, Phillips, M. M., Woosley, S. E., Blinnikov, Sergei, Morrell, Nidia, ...
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...
Optical and near-infrared observations of the peculiar Type la supernova 1999ac (2006)
Phillips, Mark M., Krisciunas, Kevin, Suntzeff, Nicholas B., Abraham, R. G., Beckett, M. G., Bonati, Marco, ...
We present 39 nights of optical photometry, 34 nights of IR photometry, and 4 nights of optical spectroscopy of the Type la supernova 1999ac. This supernova was discovered 2 weeks before maximum...
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...
Optical and near-infrared observations of the peculiar Type la supernova 1999ac (2006)
Phillips, Mark M., Krisciunas, Kevin, Suntzeff, Nicholas B., Abraham, R. G., Beckett, M. G., Bonati, Marco, ...
We present 39 nights of optical photometry, 34 nights of IR photometry, and 4 nights of optical spectroscopy of the Type la supernova 1999ac. This supernova was discovered 2 weeks before maximum...
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...
Bizyaev, Dmitry, Smith, Verne V., Arenas, Jose, Geisler, Doug, Majewski, Steven R., Patterson, Richard J., ...
We present results from a campaign of multiple epoch echelle spectroscopy of relatively faint (V = 9.5-13.5 mag) red giants observed as potential astrometric grid stars for the Space Interferometry...
The Carnegie Supernova Project: The Low-Redshift Survey (2005)
Hamuy, Mario, Folatelli, Gastón, Morrell, Nidia I., Phillips, Mark M., Suntzeff, Nicholas B., Persson, S. E., ...
Supernovae are essential to understanding the chemical evolution of the Universe. Type Ia supernovae also provide the most powerful observational tool currently available for studying the expansion...
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...
SN 2005bf: A Possible Transition Event Between Type Ib/c Supernovae and Gamma Ray Bursts (2005)
Folatelli, Gaston, Contreras, Carlos, Phillips, M. M., Woosley, S. E., Blinnikov, Sergei, Morrell, Nidia, ...
We present u'g'r'i'BV photometry and optical spectroscopy of the Type Ib/Ic SN 2005bf covering the first ~100 days following discovery. The u'g'BV light curves displayed a double-peaked morphology,...
NOAO Fundamental Plane Survey -- II. Age and Metallicity along the Red Sequence (2005)
Nelan, Jenica E., Smith, Russell J., Hudson, Michael J., Wegner, Gary A., Lucey, John R., Moore, Stephen A. W., ...
We present spectroscopic linestrength data for 4097 red-sequence galaxies in 93 low-redshift galaxy clusters, and use these to investigate variations in average stellar populations as a function of...
An Atlas of Spectrophotometric Landolt Standard Stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa, ...
We present CCD observations of 102 Landolt standard stars obtained with the R-C spectrograph on the CTIO 1.5 m telescope. Using stellar atmosphere models we have extended the flux points to our six...
SN 2005bf: A Possible Transition Event Between Type Ib/c Supernovae and Gamma Ray Bursts (2005)
Folatelli, Gaston, Contreras, Carlos, Phillips, M. M., Woosley, S. E., Blinnikov, Sergei, Morrell, Nidia, ...
We present u'g'r'i'BV photometry and optical spectroscopy of the Type Ib/Ic SN 2005bf covering the first ~100 days following discovery. The u'g'BV light curves displayed a double-peaked morphology,...
SN 2005bf: A Possible Transition Event Between Type Ib/c Supernovae and Gamma Ray Bursts (2005)
Folatelli, Gaston, Contreras, Carlos, Phillips, M. M., Woosley, S. E., Blinnikov, Sergei, Morrell, Nidia, ...
We present u'g'r'i'BV photometry and optical spectroscopy of the Type Ib/Ic SN 2005bf covering the first ~100 days following discovery. The u'g'BV light curves displayed a double-peaked morphology,...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa, ...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
Krisciunas, Kevin, Suntzeff, Nicholas B., Phillips, Mark M., Candia, Pablo, Prieto, Jose Luis, Antezana, R., ...
We present optical and/or infrared photometry of the Type Ia supernovae SN 1991T, SN 1991bg, SN 1999ek, SN 2001bt, SN 2001cn, SN 2001cz, and SN 2002bo. All but one of these supernovae have decline...
Cavallo, Robert M., Suntzeff, Nicholas B., Pilachowski, Catherine A.
Aluminum and other metal abundances were determined in 21 red giants in the globular clusters NGC 6752 and M80 as part of a larger study to determine whether the aluminum distribution on the red...
Hubble Diagrams of Type Ia Supernovae in the Near Infrared (2003)
Krisciunas, Kevin, Phillips, Mark M., Suntzeff, Nicholas B.
From observations of 7 Type Ia supernovae obtained during the last four years at the Las Campanas and Cerro Tololo Inter-American Observatories, along with previous published data for 9 supernovae,...
Krisciunas, Kevin, Phillips, Mark M., Suntzeff, Nicholas B., Persson, S. E., Hamuy, Mario, Antezana, Roberto, ...
We present near infrared photometry of the Type Ia supernova 1999ee; also, optical and infrared photometry of the Type Ia SNe 2000bh, 2000ca, and 2001ba. For SNe 1999ee and 2000bh we present the...
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...
Evidence for an asymptotic giant branch star in the progenitor system of a type Ia supernova (2003)
Hamuy, Mario, Phillips, M. M., Suntzeff, Nicholas B., Maza, Jose, Gonzalez, L. E., Roth, Miguel, ...
A type Ia supernova (SN Ia), one of the two main classes of exploding stars, is recognized by the absence of hydrogen and the presence of elements such as silicon and sulphur in its spectra. These...
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...
Optical Light Curves of Supernovae (2003)
Leibundgut, Bruno, Suntzeff, Nicholas B.
Photometry is the most easily acquired information about supernovae. The light curves constructed from regular imaging provide signatures not only for the energy input, the radiation escape, the...
Parent Stars of Extrasolar Planets VII: New Abundance Analyses of 30 Systems (2003)
Laws, Chris, Gonzalez, Guillermo, Walker, Kyle M., Tyagi, Sudhi, Dodsworth, Jeremy, Snider, Keely, ...
The results of new spectroscopic analyses of 30 stars with giant planet and/or brown dwarf companions are presented. Values for Teff and [Fe/H] are used in conjunction with Hipparcos data and Padova...
Bolometric Light Curves of Supernovae (2002)
The thermalized energy from the radioactive decays of 56Ni and 57Ni and their daughter nuclides power the light curves of supernovae near maximum light. The bolometric light curve gives us a...
Optical and Infrared Photometry of the Unusual Type Ia Supernova 2000cx (2002)
Candia, P., Krisciunas, K., Suntzeff, Nicholas B., Gonzalez, D., Espinoza, J., Leiton, R., ...
We present optical and infrared photometry of the unusual Type Ia supernova 2000cx. With the data of Li et al. (2001) and Jha (2002), this comprises the largest dataset ever assembled for a Type Ia...
Evidence for Core Collapse in the Type Ib/c SN 1999ex (2002)
Hamuy, Mario, Stritzinger, Maximilian, Phillips, M. M., Suntzeff, Nicholas B., Maza, Jose, Pinto, Philip A.
We present optical and infrared spectra of SN 1999ex that reveal a clear example of an intermediate Type Ib/c case. This suggests a continuous spectroscopic sequence between Type Ib and Type Ic...
Optical and Infrared Photometry of the Nearby Type Ia Supernova 2001el (2002)
Krisciunas, Kevin, Suntzeff, Nicholas B., Candia, Pablo, Arenas, Jose, Espinoza, Juan, Gonzalez, David, ...
We present well sampled optical (UBVRI) and infrared (JHK) light curves of the nearby (~18.0 Mpc) Type Ia supernova SN 2001el, from 11 days before to 142 days after the time of B-band maximum. The...
Carbon Isotopic Abundances in the Red Giants of Omega Centauri (NGC5139) (2002)
Smith, Verne V., Terndrup, Donald M., Suntzeff, Nicholas B.
Carbon-12 and carbon-13 abundances are measured in eleven red-giant members of the globular cluster Omega Centauri via observations of first-overtone CO bands near 2.3 microns. The mean value for the...
Van Der Marel, Roeland P., Alves, David R., Hardy, Eduardo, Suntzeff, Nicholas B.
We derive general expressions for the LMC velocity field which we fit to kinematical data for 1041 carbon stars. We demonstrate that all previous studies of LMC kinematics have made unnecessary...
Optical and Infrared Spectroscopy of SN 1999ee and SN 1999ex (2002)
Hamuy, Mario, Maza, Jose, Pinto, Philip A., Phillips, M. M., Suntzeff, Nicholas B., Blum, R. D., ...
We report optical and infrared spectroscopic observations of the Type Ia SN 1999ee and the Type Ib/c SN 1999ex, both of which were hosted by the galaxy IC 5179. For SN 1999ee we obtained a continuous...
Pun, Chun S. J., Michael, Eli, Zhekov, Svetozar A., McCray, Richard, Garnavich, Peter M., Challis, Peter M., ...
We report and interpret HST/STIS long-slit observations of the optical and ultraviolet (1150 - 10270 Angstrom) emission-line spectra of the rapidly brightening Spot 1 on the equatorial ring of SN...
Krisciunas, Kevin, Phillips, Mark M., Stubbs, Christopher, Rest, Armin, Miknaitis, Gajus, Riess, Adam G., ...
We present BVRI photometry of the Type Ia supernovae 1999da, 1999dk, 1999gp, 2000bk, and 2000ce, plus infrared photometry of three of these. These objects exhibit the full range of decline rates of...
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...
HST Spectroscopy of Spot 1 on the Circumstellar Ring of SN 1987A (2000)
Michael, Eli, McCray, Richard, Pun, C. S. J., Garnavich, Peter, Challis, Peter, Kirshner, Robert P., ...
We present ultraviolet and optical spectra of the first bright spot (PA = 29 degrees) on Supernova 1987A's equatorial circumstellar ring taken with the Space Telescope Imaging Spectrograph. We...
A Search for Environmental Effects on Type Ia Supernovae (2000)
Hamuy, Mario, Trager, S. C., Pinto, Philip A., Phillips, M. M., Schommer, R. A., Ivanov, Valentin, ...
We use integrated colors and B and V absolute magnitudes of Type Ia supernova (SN) host galaxies in order to search for environmental effects on the SN optical properties. With the new sample of 44...
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...
The Observations of Type Ia Supernovae (2000)
The past ten years have seen a tremendous increase in the number of Type Ia supernovae discovered and in the quality of the basic data presented. The cosmological results based on distances to Type...
The Luminous Type Ic SN 1992ar at z=0.145 (1999)
Clocchiatti, Alejandro, Phillips, Mark M., Suntzeff, Nicholas B., DellaValle, Massimo, Cappellaro, Enrico, Turatto, Massimo, ...
We present spectroscopic and photometric observations of SN1992ar, the more distant SN in the Calan/Tololo Survey. We compare its spectrum with those of nearby Type Ia and Ic SNe and conclude that...
Ivans, Inese I., Sneden, Christopher, Kraft, Robert P., Suntzeff, Nicholas B., Smith, Verne V., Langer, G. Edward, ...
We present a chemical composition analysis of 36 giants in the nearby mildy metal-poor ( = -1.18) "CN-bimodal" globular cluster M4. Confronted with a cluster that has large and variable interstellar...
Suntzeff, Nicholas B., Phillips, M. M., Covarrubias, R., Navarrete, M., Perez, J. J., Guerra, A., ...
We present the UBVRI light curves of the Type Ia supernova SN 1998bu which appeared in the nearby galaxy M96 (NGC 3368). M96 is a spiral galaxy in the Leo I group which has a Cepheid-based distance....
Suntzeff, Nicholas B., Walker, Alistair R., Smith, Verne V., Kraft, Robert P., Klemola, Arnold, Stetson, Peter B.
We present both low and high-dispersion abundance analyses of giants drawn from the zero proper motion sample near NGC 121. For the sample of 35 stars, the mean metallicity of the SMC field near NGC...
Schmidt, Brian P., Suntzeff, Nicholas B., Phillips, M. M., Schommer, Robert A., Clocchiatti, Alejandro, Kirshner, Robert P., ...
The High-Z Supernova Search is an international collaboration to discover and monitor type Ia supernovae (SN Ia) at $z > 0.2$ with the aim of measuring cosmic deceleration and global curvature. Our...
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...
Optical Light Curves of the Type Ia Supernovae 1990N and 1991T (1997)
Lira, P., Suntzeff, Nicholas B., Phillips, M. M., Hamuy, Mario, Maza, Jose, Schommer, R. A., ...
We present UBVRI light curves for the bright Type Ia supernovae SN 1990N in NGC 4639 and SN 1991T in NGC 4527 based on photometry gathered in the course of the Calan/Tololo supernova program. Both...
The Ten-Year Photometric Evolution of SN 1987A (1997)
Ten years of photometric observations of SN 1987A are reviewed. The optical and near-infrared colors are now declining at less than 1 magnitude per 1000 days, which is consistent with both the...
The Absolute Luminosities of the Calan/Tololo Type Ia Supernovae (1996)
Hamuy, Mario, Phillips, M. M., Schommer, Robert A., Suntzeff, Nicholas B., Maza, José, Avilés, R.
We examine the absolute luminosities of 29 SNe Ia in the Calan/Tololo survey. We confirm a relation between the peak luminosity of the SNe and the decline rate as measured by the light curve, as...
The Hubble Diagram of the Calan/Tololo Type Ia Supernovae and the value of Ho (1996)
Hamuy, Mario, Phillips, M. M., Suntzeff, Nicholas B., Schommer, Robert A., Maza, José, Avilés, R.
The Calan/Tololo supernova survey has discovered ~30 Type Ia supernovae out to z~0.1. Using BVI data for these objects and nearby SNe Ia, we have shown that there exists a significant dispersion in...
The Morphology of Type Ia Supernovae Light Curves (1996)
Hamuy, Mario, Phillips, M. M., Suntzeff, Nicholas B., Schommer, Robert A., Maza, José, Smith, R. C., ...
We present a family of six BVI template light curves for SNe Ia for days -5 and +80, based on high-quality data gathered at CTIO. These templates display a wide range of light curve morphologies,...
BVRI Light Curves for 29 Type Ia Supernovae (1996)
Hamuy, Mario, Phillips, M. M., Suntzeff, Nicholas B., Schommer, Robert A., Maza, José
BVRI light curves are presented for 27 Type Ia supernovae discovered during the course of the Calan/Tololo Survey and for two other SNe Ia observed during the same period. Estimates of the maximum...
Kinman, T. D., Pier, Jeffrey R., Suntzeff, Nicholas B., Harmer, D. L., Valdes, F., Hanson, Robert B., ...
The radial velocity dispersion of 67 RR Lyrae variable and blue horizontal branch (BHB) stars that are more than 4 kpc above the galactic plane at the North Galactic Pole is 110 km/sec and shows no...
The Abundance Spread Among Giants and Subgiants in the Globular Cluster Omega Centauri (1996)
Suntzeff, Nicholas B., Kraft, Robert P.
We present spectroscopic abundances and radial velocities for giant stars in the Galactic globular cluster omega Centauri based on the CaII infrared triplet. Two samples of stars were observed: 234...
The CTIO Prime Focus CCD: System Characteristics from 1982-1988 (1996)
Suntzeff, Nicholas B., Walker, Alistair R.
The CTIO Prime Focus CCD instrument with an RCA CCD was in operation at the CTIO 4-m telescope for six years between 1982-1988. A large body of literature has been published based on CCD images taken...
Eastman, Ronald G., Phillips, Mark M., Suntzeff, Nicholas B., Hamuy, Mario, Maza, Jose, ...
We have used observations gathered at CTIO to measure distances by the Expanding Photosphere Method (EPM) to 5 Type II supernovae. These supernovae lie at redshifts from cz = 1100 km/s to z = 5500...