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Title:
CfA3: 185 Type Ia Supernova Light Curves from the CfA
Authors:
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
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ; Department of Physics, Harvard University, Cambridge, MA 02138, USA ; ), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AC(Department of Physics and Astronomy, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, USA ), AD(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AE(National Optical Astronomy Observatory, NOAO Gemini Science Center, 950 North, Cherry Avenue, Tucson, AZ 85719, USA ), AF(Astronomy Department, UC Berkeley, Campbell Hall, Berkeley, CA 94720, USA ), AG(Department of Physics, Harvard University, Cambridge, MA 02138, USA ), AH(Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA ), AI(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AJ(Department of Physics and Astronomy, University of California, 2158 Frederick Reines Hall, Irvine, CA 92697, USA ), AK(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AL(Physics Department, Marietta College, 215 Firth Street, Marietta, OH 45750, USA ), AM(Centro de Investigaciones de Astronomia (CIDA), Apdo Postal 264 VE, Merida 5101-A, Bolivarian Republic of Venezuela ), AN(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AO(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AP(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AQ(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AR(Adler Planetarium & Astronomy Museum, 1300 S. Lake Shore Drive, Chicago, IL 60605, USA ), AS(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AT(Department of Physics and Astronomy, University of North Carolina at Chapel Hill, NC 27599-3255, USA ), AU(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AV(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), AW(The University of Arizona, Tucson, AZ 85721, USA ), AX(Planetary Science Institute, 1700 E. Fort Lowell Road, Tucson, AZ 85719, USA ), AY(Planetary Science Institute, 1700 E. Fort Lowell Road, Tucson, AZ 85719, USA ), AZ(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BB(Department of Physics and Astronomy, University of North Carolina at Chapel Hill, NC 27599-3255, USA ), BC(University of Notre Dame, 25 Nieuwland Science Hall, Notre Dame, IN 46556-5670, USA ), BD(University of California, Astronomy & Astrophysics, 201 Interdisciplinary Sciences Building (ISB), Santa Cruz, CA 95064, USA ), BE(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BF(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BG(The University of Arizona, Tucson, AZ 85721, USA ), BH(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BI(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BJ(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BK(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BL(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BM(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BN(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BO(Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA ), BP(Department of Astronomy and Astrophysics, 525 Davey Lab, The Pennsylvania State University, University Park, PA 16802, USA ), BQ(George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics, Texas A&M University, 4242 TAMU, College Station, TX 77843-4242, USA ), BR(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BS(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BT(Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA ), BU(Department of Physics & Astronomy, University of Waterloo, 200 University Avenue, West Waterloo, Ontario N2L 3G1, Canada ), BV(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BW(Copernicus Astronomical Center in Warsaw, Poland Bartycka 18, 00-716 Warszawa, Poland ), BX(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), BY(The University of Arizona, Tucson, AZ 85721, USA ), BZ(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CC(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CD(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CE(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CF(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CG(Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA ), CH(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CI(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CJ(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CK(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CL(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CM(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CN(OSU Department of Astronomy, McPherson Laboratory 140 W 18th Avenue, Columbus, OH 43210, USA ), CO(Department of Physics & Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada ), CP(European Southern Observatory, D-85748 Garching, Germany), CQ(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ; Department of Physics, Harvard University, Cambridge, MA 02138, USA ), CR(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CS(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CT(Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA ), CU(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CV(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CW(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CX(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA ), CY(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA )
Publication:
The Astrophysical Journal, Volume 700, Issue 1, pp. 331-357 (2009). (ApJ Homepage)
Publication Date:
07/2009
Origin:
IOP
ApJ Keywords:
supernovae: general
DOI:
10.1088/0004-637X/700/1/331
Bibliographic Code:
2009ApJ...700..331H

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 lsim 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 lsim0.02 mag in BVRIr'i' and lsim0.04 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.
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