The Stockholm VIMOS Supernova survey - first results

by Dr Jens Melinder (Stockholm University)

Friday 3 Oct 2008, 10:30 → 12:00 Europe/Stockholm

FA32

The aim of the Stockholm VIMOS Supernova Survey is to find and characterize supernovae in the redshift range ~0.1 to ~1.2 and to derive accurate supernova rate densities for this redshift range. A preliminary analysis show that we have 14 prime SN candidates and an additional 23 less secure detections in one of our search fields. A sample of R+I light curves for prime candidates will be presented. ' I will also discuss some results from testing of our supernova search pipeline on simulated data. The main result of this study is that the detection pipeline can be used to detect faint supernovae in deep imaging data, and that the detection efficiency as well as photometric accuracy can be estimated. However, we have found that there are some problems with the image subtraction. For all tested parameters and data epochs we find that there is a small systematic flux offset remaining at the positions of galaxies in the subtracted frames. We find that the systematic offset can be corrected for by doing detailed simulations of the full SN detection method.

[Note room!]