The type Ia supernova rate at {ital z}{approximately}0.4

Journal Article · Sun Dec 01 00:00:00 EST 1996 · Astrophysical Journal

DOI:https://doi.org/10.1086/178150· OSTI ID:495852

Pain, R ^[1]; Hook, I M ^[1]; Deustua, S; Gabi, S ^[1]; Goldhaber, G ^[1]; Groom, D; Kim, A G; Kim, M Y; Lee, J C ^[1]; Pennypacker, C R ^[1]; Perlmutter, S ^[1]; Small, I A ^[1]; Goobar, A ^[2]; Ellis, R S; McMahon, R G ^[3]; Glazebrook, K ^[4]; Boyle, B J; Bunclark, P S; Carter, D; Irwin, M J ^[5]

---

1. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
2. Universitet Stockholms, S-106 91 Stockholm (Sweden)
3. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (England)
4. Anglo-Australian Observatory, P.O. Box 296, Epping, NSW 2121 (Australia)
5. Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ (England)

We present the first measurement of the rate of Type Ia supernovae at high redshift. The result is derived by using a large subset of data from the Supernova Cosmology Project. Three supernovae were discovered in a surveyed area of 1.7 deg{sup 2}. The survey spanned a {approximately}3 week baseline and used images with 3 {sigma} limiting magnitudes of {ital R}{approximately}23. We present our methods for estimating the numbers of galaxies and the number of solar luminosities to which the survey is sensitive, as well as the supernova detection efficiency, which is used to determine the control time, the effective time for which the survey is sensitive to a Type Ia event. We derive a rest-frame Type Ia supernova (SN) rate at {ital z}{approximately}0.4 of 0.82{sub {minus}0.37{minus}0.25}{sup +0.54+0.37} {ital h}{sup 2} SNu (1 SNu=1 SN per century per 10{sup 10} {ital L}{sub {ital B}{circle_dot}}), where the first uncertainty is statistical and the second includes systematic effects. For the purposes of observers, we also determine the rate of SNe, per sky area surveyed, to be 34.4{sub {minus}16.2}{sup +23.9} SNe yr{sup {minus}1} deg{sup {minus}2} for SN magnitudes in the range 21.3{lt}{ital R}{lt}22.3. {copyright} {ital 1996 The American Astronomical Society.}

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 495852
• Journal Information: Astrophysical Journal, Vol. 473, Issue 1; Other Information: PBD: Dec 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
SUPERNOVAE
RED SHIFT
GALAXY CLUSTERS
LUMINOSITY
GALACTIC EVOLUTION