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Berkeley Supernova Ia Program - I. Observations, data reduction and spectroscopic sample of 582 low-redshift Type Ia supernovae

J. M. SilvermanDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAR. J. FoleyHarvard-Smithsonian Center for Astrophysics; 60 Garden Street; Cambridge; MA; 02138; USAA. V. FilippenkoDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAM. GaneshalingamDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAAaron J. BarthDepartment of Physics and Astronomy; 4129 Frederick Reines Hall; University of California; Irvine; CA; 92697; USAR. ChornockHarvard-Smithsonian Center for Astrophysics; 60 Garden Street; Cambridge; MA; 02138; USAC. V. GriffithDepartment of Astronomy and Astrophysics The Pennsylvania State University University Park PA 16802 USAJason KongDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USANicholas LeeInstitute for Astronomy; University of Hawaii; 2680 Woodlawn Drive; Honolulu; HI; 96822; USADouglas C. LeonardDepartment of Astronomy; San Diego State University; San Diego; CA; 92182-1221; USAT. MathesonNational Optical Astronomy Observatory; 950 North Cherry Avenue; Tucson; AZ; 85719-4933; USAEmily G. MillerUniversity of Pennsylvania; 3451 Walnut Street; Philadelphia; PA; 19104; USAT. N. SteeleDepartment of Computer Science, Kutztown University of Pennsylvania, Kutztown, PA 19530, USAB. BarrisInstitute for Astronomy; University of Hawaii; 2680 Woodlawn Drive; Honolulu; HI; 96822; USAJ. S. BloomDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAB. E. CobbDepartment of Physics; The George Washington University; Washington; DC; 20052; USAAlison L. CoilDepartment of Physics; University of California; San Diego, 9500 Gilman Drive; La Jolla; CA; 92093; USALouis‐Benoit DesrochesDepartment of Astronomy, University of California, Berkeley, CA 94720‐3411, USAE. L. GatesUniversity of California Observatories/Lick Observatory; PO Box 85; Mount Hamilton; CA; 95140; USALuis C. HoThe Observatories of the Carnegie Institution for Science; 813 Santa Barbara Street; Pasadena; CA; 91101; USASaurabh W. JhaDepartment of Physics and Astronomy; Rutgers the State University of New Jersey; 136 Frelinghuysen Road; Piscataway; NJ; 08854; USAM. T. KandrashoffDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAWeidong LiDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAKaisey S. MandelHarvard-Smithsonian Center for Astrophysics; 60 Garden Street; Cambridge; MA; 02138; USAM. ModjazCenter for Cosmology and Particle Physics New York University 4 Washington Place New York NY 10003 USAM. MooreDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAR. MostardiDepartment of Physics and Astronomy, University of California, Los Angeles, CA 90095, USAM. PapenkovaDepartment of Physics and Astronomy; East Los Angeles College; Monterey Park; CA; 91754; USASung ParkDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAD. A. PerleyDepartment of Astronomy, University of California, Berkeley, CA 94720-3411, USAD. PoznanskiSchool of Physics and Astronomy, Tel-Aviv University, Tel Aviv 69978, IsraelC. ReuterDepartment of Astronomy, University of California, Berkeley, CA 94720-3411, USAJ. ScalaDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAFranklin J. D. SerdukeDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USAJoseph C. ShieldsDepartment of Physics and Astronomy; Ohio University; Athens; OH; 45701; USABrandon SwiftSteward Observatory; University of Arizona; 933 North Cherry Avenue; Tucson; AZ; 85721-0065; USAJ. TonryInstitute for Astronomy; University of Hawaii; 2680 Woodlawn Drive; Honolulu; HI; 96822; USASchuyler D. Van DykSpitzer Science Center; California Institute of Technology; 1200 East California Boulevard; Pasadena; CA; 91125; USAXiaofeng WangDepartment of Physics and Tsinghua Center for Astrophysics; Tsinghua University; Beijing; 100084; ChinaD. S. WongDepartment of Astronomy; University of California; Berkeley; CA; 94720-3411; USA

2012en

ABI

Annotatsiya

In this first paper in a series, we present 1298 low-redshift (z ≲ 0.2) optical spectra of 582 Type Ia supernovae (SNe Ia) observed from 1989 to 2008 as part of the Berkeley Supernova Ia Program (BSNIP). 584 spectra of 199 SNe Ia have well-calibrated light curves with measured distance moduli, and many of the spectra have been corrected for host-galaxy contamination. Most of the data were obtained using the Kast double spectrograph mounted on the Shane 3 m telescope at Lick Observatory and have a typical wavelength range of 3300-10400 Å, roughly twice as wide as spectra from most previously published data sets. We present our observing and reduction procedures, and we describe the resulting SN Database, which will be an online, public, searchable data base containing all of our fully reduced spectra and companion photometry. In addition, we discuss our spectral classification scheme (using the SuperNova IDentification code, snid; Blondin & Tonry), utilizing our newly constructed set of snid spectral templates. These templates allow us to accurately classify our entire data set, and by doing so we are able to reclassify a handful of objects as bona fide SNe Ia and a few other objects as members of some of the peculiar SN Ia subtypes. In fact, our data set includes spectra of nearly 90 spectroscopically peculiar SNe Ia. We also present spectroscopic host-galaxy redshifts of some SNe Ia where these values were previously unknown. The sheer size of the BSNIP data set and the consistency of our observation and reduction methods make this sample unique among all other published SN Ia data sets and complementary in many ways to the large, low-redshift SN Ia spectra presented by Matheson et al. and Blondin et al. In other BSNIP papers in this series, we use these data to examine the relationships between spectroscopic characteristics and various observables such as photometric and host-galaxy properties. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.

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DOI: 10.1111/j.1365-2966.2012.21270.x

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