The rate of supernovae. I - The data base, the recipe and the uncertainties

Details The rate of supernovae. I - The data base, the recipe and the uncertainties The rate of supernovae. I - The data base, the recipe and the uncertainties

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...268..472c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 268, no. 2, p. 472-482.

Astronomy and Astrophysics

Astrophysics

51

Galactic Structure, Supernova Remnants, Supernovae, Charge Coupled Devices, Light Curve, Stellar Luminosity, Stellar Magnitude

Scientific paper

Because the determination of SN rates is vulnerable to the small number statistics of homogeneous samples, the data bases of two independent SN searches were merged in order to build up the largest data base ever used for SN rate determinations. Using a software specially developed for the analysis of these materials, the individual control times were estimated for each galaxy and in turn the SN rates for samples of galaxies extracted from different catalogs were estimated. The uncertainties in the input parameters were quantitatively estimated by several tests. It is found that the assumption of the limiting discovery magnitude is crucial. Contrary to previous belief, it is shown that the dispersion of the absolute SN magnitude at maximum is not particularly important for the SN rates determined from the samples, whereas uncertainties about the shape of the light curve are more serious. The rate of SNe was computed for four galaxy samples extracted from different catalogs. It is shown that the SNe rate reflects the differences among the galaxy parameters reported by different catalogs.

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