Variable Sodium Absorption in a Low-extinction Type Ia Supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Recent observations have revealed that some Type Ia supernovae exhibit narrow, time-variable Na I D absorption features. The origin of the absorbing material is controversial, but it may suggest the...
Variable Sodium Absorption in a Low-Extinction Type Ia Supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Recent observations have revealed that some Type Ia supernovae exhibit narrow, time-variable Na I D absorption features. The origin of the absorbing material is controversial, but it may suggest the...
Type II Supernovae as Probes of Cosmology (2009)
Poznanski, Dovi, Baron, Eddie, Blondin, Stephane, Bloom, Joshua S., D'Andrea, Christopher B., Della Valle, Massimo, ...
- Constraining the cosmological parameters and understanding Dark Energy have tremendous implications for the nature of the Universe and its physical laws. - The pervasive limit of systematic...
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...
Variable sodium absorption in a low-extinction type Ia supernova (2009)
Simon, Joshua D., Gal-Yam, Avishay, Gnat, Orly, Quimby, Robert M., Ganeshalingam, Mohan, Silverman, Jeffrey M., ...
Type Ia Supernovae are Good Standard Candles in the Near Infrared: Evidence from PAIRITEL (2007)
Wood-Vasey, W. Michael, Friedman, Andrew S., Bloom, Joshua S., Hicken, Malcolm, Modjaz, Maryam, Kirshner, Robert P., ...
We have obtained 1087 NIR (JHKs) measurements of 21 SNe Ia using PAIRITEL, nearly doubling the number of well-sampled NIR SN Ia light curves. These data strengthen the evidence that SNe Ia are...
Dessart, Luc, Blondin, Stephane, Brown, Peter J., Hicken, Malcolm, Hillier, D. John, Holland, Stephen T., ...
We analyze the Type II Plateau supernovae (SN II-P) 2005cs and 2006bp with the non-LTE model atmosphere code CMFGEN. We fit 13 spectra in the first month for SN 2005cs and 18 for SN 2006bp. {\sl...
Stubbs, Christopher W., High, F. William, George, Matthew R., DeRose, Kimberly L., Blondin, Stephane, Tonry, John L., ...
Motivated by the recognition that variation in the optical transmission of the atmosphere is probably the main limitation to the precision of ground-based CCD measurements of celestial fluxes, we...
Early Ultraviolet, Optical and X-Ray Observations of the Type IIP SN 2005cs in M51 with Swift (2006)
Brown, Peter J., Dessart, Luc, Holland, Stephen T., Immler, Stefan, Landsman, Wayne, Blondin, Stephane, ...
We report early photospheric-phase observations of the Type IIP Supernova (SN) 2005cs obtained by Swift's Ultraviolet-Optical and X-Ray Telescopes. Observations started within two days of discovery...
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...
Optical Spectra of Thermonuclear Supernovae in the Local and Distant Universe (2005)
This thesis is devoted to the study of optical spectra of thermonuclear supernovae, known as ``Type Ia'' supernovae (SN Ia). These violent stellar explosions, visible across a large fraction of the...
Optical Spectra of Thermonuclear Supernovae in the Local and Distant Universe (2005)
This thesis is devoted to the study of optical spectra of thermonuclear supernovae, known as ``Type Ia'' supernovae (SN Ia). These violent stellar explosions, visible across a large fraction of the...
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...
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...