# Type Ia supernova rate at $z \sim 0.1$

Abstract : We present the EROS nearby supernova ($z \sim 0.02 - 0.2$) search and the analysis of the first year of data (1997). A total of 80 square degrees were surveyed. Eight supernov{æ} were detected, four of which were spectroscopically identified as type Ia supernov{æ}. The search efficiency was determined with a Monte-Carlo simulation taking into account the efficiencies for both supernova detection and host galaxy identification. Assuming that for a given galaxy the supernova rate is proportional to the galactic luminosity, we compute a type Ia supernova explosion rate of: ${\cal R} = 0.44 {}_{-0.21}^{+0.35} {}_{-0.07}^{+0.13} h^2: / 10^{10} \lbsun / 100 {\rm yrs}$ at an average redshift of $\sim 0.1$ where the errors are respectively statistical and systematic (type misidentification included).
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00018511
Contributor : Hélène Kerec Connect in order to contact the contributor
Submitted on : Thursday, March 1, 2001 - 3:00:12 PM
Last modification on : Wednesday, November 17, 2021 - 4:22:24 PM

### Citation

D P. Hardin, C. Afonso, C. Alard, J N. Albert, A. Amadon, et al.. Type Ia supernova rate at $z \sim 0.1$. Astronomy and Astrophysics - A&A, EDP Sciences, 2000, 362, pp.419-425. ⟨in2p3-00018511⟩

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