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The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations?
M. M. Phillips, W. Li, J. A. Frieman +41
We present extensive u'g'r'i'BVRIYJHKs photometry and optical spectroscopy of SN 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002…
Report of the Dark Energy Task Force
Andreas Albrecht, Gary Bernstein, Robert Cahn +10
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 th…
The Type Ia supernova 2004S, a clone of SN 2001el, and the optimal photometric bands for extinction estimation
Kevin Krisciunas, Peter M. Garnavich, Vallery Stanishev +9
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. Th…
Preliminary Results from Detector-Based Throughput Calibration of the CTIO Mosaic Imager and Blanco Telescope Using a Tunable Laser
Christopher W. Stubbs, Sara K. Slater, Yorke J. Brown +7
We describe the scientific motivation for achieving photometric precision and accuracy below the 1% level, and we present a calibration philosophy based on using calibrated detecto…
Lightcurves of Type Ia Supernovae from Near the Time of Explosion
Arti Garg, Christopher W. Stubbs, Peter Challis +18
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 dis…
A New Method to Calibrate the Magnitudes of Type Ia Supernovae at Maximum Light
Jose Luis Prieto, Armin Rest, Nicholas B. Suntzeff
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 del…