CfA3: 185 TYPE Ia SUPERNOVA LIGHT CURVES FROM THE CfA
Creators: name: Everett, Mark
name: Smalley, Kyle
name: Jerius, Diab
name: Marrone, Daniel
name: Roussanova, Anna
name: Naranjo, Orlando
name: Torres, Manuel A.P.
name: Blondin, Stéphane
name: Barton, Elizabeth J.
name: Berlind, Perry
name: Muzerolle, James
name: Hicken, Malcolm
name: Zhao, Ping
name: Brown, Warren R.
name: Rest, Armin
name: Fernandez, Jose
name: Cho, Richard
name: Macri, Lucas
name: Jha, Saurabh
name: Sicilia-Aguilar, Aurora
name: Peterson, Dawn
name: Matheson, Tom
name: Schild, Rudolph
name: Hutchison, Bob
name: Caldwell, Nelson
name: Holman, Matthew J.
name: Briceño, Cesar
name: Ciupik, Larry
name: Kilgard, Roy
name: Wang, Zhong
name: Vikhlinin, Alexey
name: Huchra, John
name: Garnavich, Peter
name: Westover, Mike
name: Modjaz, Maryam
name: McIntosh, Daniel
name: Graves, Genevieve
name: Barmby, Pauline
name: Esquerdo, Gil
name: Woods, Deborah
name: Hradecky, Vit
name: Hergenrother, Carl
name: Jordan, Andres
name: Eriksen, Kris
name: Krauss, Miriam
name: Narayan, Gautham
name: Vaz, Amili
name: Dendy, Kristi Concannon
name: Dosaj, Anil
name: Challis, Peter
name: Luhman, Kevin
name: Stubbs, Christopher W.
name: McNamara, Brian
name: Falco, Emilio
name: Smith, Andy
name: Spahr, Tim
name: Bragg, Ann
name: McDowell, Jonathan
name: Ripman, Ben
name: Durham, Nick
name: Megeath, Tom
name: Calkins, Mike
name: Contreras, Maria
name: Sokoloski, Jennifer
name: Stanek, K. Z.
name: Kirshner, Robert P.
name: Groner, Ted
name: Munoz, Diego
name: Bakos, Gaspar
name: Pahre, Michael
name: Mochejska, Barbara
name: Wood-Vasey, W. Michael
name: Szentgyorgyi, Andrew
name: Peters, Wayne
name: Rines, Ken
name: Gaba, Alejandro
name: Green, Paul
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2009

description: We present multiband photometry of 185 type-Ia supernovae (SNe Ia), with over 11,500 observations. These were acquired between 2001 and 2008 at the F. L. Whipple Observatory of the Harvard-Smithsonian Center for Astrophysics (CfA). This sample contains the largest number of homogeneously observed and reduced nearby SNe Ia (z 0.08) published to date. It more than doubles the nearby sample, bringing SN Ia cosmology to the point where systematic uncertainties dominate. Our natural system photometry has a precision of 0.02 mag in BVRIr'i' and 0.04 mag in U for points brighter than 17.5 mag. We also estimate a systematic uncertainty of 0.03 mag in our SN Ia standard system BVRIr'i' photometry and 0.07 mag for U. Comparisons of our standard system photometry with published SN Ia light curves and comparison stars, where available for the same SN, reveal agreement at the level of a few hundredths mag in most cases. We find that 1991bg-like SNe Ia are sufficiently distinct from other SNe Ia in their color and light-curve-shape/luminosity relation that they should be treated separately in light-curve/distance fitter training samples. The CfA3 sample will contribute to the development of better light-curve/distance fitters, particularly in the few dozen cases where near-infrared photometry has been obtained and, together, can help disentangle host-galaxy reddening from intrinsic supernova color, reducing the systematic uncertainty in SN Ia distances due to dust.