Cfa4: Light Curves for 94 Type Ia Supernovae
CfA4: Light Curves for 94 Type Ia Supernovae Malcolm Hicken1, Peter Challis1, Robert P. Kirshner1, Armin Rest2, Claire E. Cramer3, W. Michael Wood-Vasey4, Gaspar Bakos1,5, Perry Berlind1, Warren R. Brown1, Nelson Caldwell1, Mike Calkins1, Thayne Currie6, Kathy de Kleer7, Gil Esquerdo8, Mark Everett8, Emilio Falco1, Jose Fernandez1, Andrew S. Friedman1, Ted Groner1, Joel Hartman1,5, Matthew J. Holman1, Robert Hutchins1, Sonia Keys1, David Kipping1, Dave Latham1, George H. Marion1, Gautham Narayan1, Michael Pahre1, Andras Pal1, Wayne Peters1, Gopakumar Perumpilly9, Ben Ripman1, Brigitta Sipocz1, Andrew Szentgyorgyi1, Sumin Tang1, Manuel A. P. Torres1, Amali Vaz10, Scott Wolk1, Andreas Zezas1 ABSTRACT We present multi-band optical photometry of 94 spectroscopically-confirmed Type Ia supernovae (SN Ia) in the redshift range 0.0055 to 0.073, obtained be- tween 2006 and 2011. There are a total of 5522 light curve points. We show that our natural system SN photometry has a precision of . 0.03 mag in BVr’i’, . 0.06 mag in u′, and . 0.07 mag in U for points brighter than 17.5 mag and estimate that it has a systematic uncertainty of 0.014, 0.010, 0.012, 0.014, 0.046, and 0.073 mag in BVr’i’u’U, respectively. Comparisons of our standard system photometry with published SN Ia light curves and comparison stars reveal mean agreement across samples in the range of ∼0.00-0.03 mag. We discuss the recent mea- surements of our telescope-plus-detector throughput by direct monochromatic illumination by Cramer et al. (in prep.). This technique measures the
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