CfA3: 185 TYPE Ia SUPERNOVA LIGHT CURVES FROM THE CfA
Author
Hicken, Malcolm
Challis, Peter
Jha, Saurabh
Kirshner, Robert P.
Matheson, Tom
Modjaz, Maryam
Rest, Armin
Michael Wood-Vasey, W.
Bakos, Gaspar
Barton, Elizabeth J.
Berlind, Perry
Bragg, Ann
Briceño, Cesar
Brown, Warren R.
Caldwell, Nelson
Calkins, Mike
Cho, Richard
Ciupik, Larry
Contreras, Maria
Dendy, Kristi-Concannon
Dosaj, Anil
Durham, Nick
Eriksen, Kris
Esquerdo, Gil
Everett, Mark
Falco, Emilio
Fernandez, Jose
Gaba, Alejandro
Garnavich, Peter
Graves, Genevieve
Green, Paul
Groner, Ted
Hergenrother, Carl
Holman, Matthew J.
Hradecky, Vit
Huchra, John
Hutchison, Bob
Jerius, Diab
Jordan, Andres
Kilgard, Roy
Krauss, Miriam
Luhman, Kevin
Macri, Lucas
Marrone, Daniel
McDowell, Jonathan
McIntosh, Daniel
McNamara, Brian
Megeath, Tom
Mochejska, Barbara
Munoz, Diego
Muzerolle, James
Naranjo, Orlando
Narayan, Gautham
Pahre, Michael
Peters, Wayne
Peterson, Dawn
Rines, Ken
Ripman, Ben
Roussanova, Anna
Schild, Rudolph
Sicilia-Aguilar, Aurora
Sokoloski, Jennifer
Smalley, Kyle
Smith, Andy
Spahr, Tim
Stanek, K. Z.
Barmby, Pauline
Blondin, Stéphane
Stubbs, Christopher W.
Szentgyorgyi, Andrew
Torres, Manuel A. P.
Vaz, Amili
Vikhlinin, Alexey
Wang, Zhong
Westover, Mike
Woods, Deborah
Zhao, Ping
Published Version
https://doi.org/10.1088/0004-637X/700/1/331Metadata
Show full item recordCitation
Hicken, Malcolm, Peter Challis, Saurabh Jha, Robert P. Kirshner, Tom Matheson, Maryam Modjaz, Armin Rest, et al. 2009. “CfA3: 185 TYPE Ia SUPERNOVA LIGHT CURVES FROM THE CfA.” The Astrophysical Journal 700 (1): 331–57. https://doi.org/10.1088/0004-637x/700/1/331.Abstract
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 less than or similar to 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 less than or similar to 0.02 mag in BV RIr'i' and less than or similar to 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 BV RIr'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.Terms of Use
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