Gamma ray bursts and supernovae: searches for positional and time coincidences and correlations in observed parameters

Details Gamma ray bursts and supernovae: searches for positional and time coincidences and correlations in observed parameters Gamma ray bursts and supernovae: searches for positional and time coincidences and correlations in observed parameters

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.459..387h&link_type=abstract

In: Exploring the gamma-ray universe. Proceedings of the Fourth INTEGRAL Workshop, 4-8 September 2000, Alicante, Spain. Editor:

Computer Science

Databases

2

Gamma-Ray Bursts, Supernovae

Scientific paper

The possible supernovae-GRBs correlations have been intensively debated from various aspects recently. We present results of cross-correlations (including recently detected triggers) of SNe and GRBs databases to look for any kind of possible correlations in time and position. Since the physical picture is not yet clear, and since there have been very different theoretical predictions for the time lags between SNe and GRBs, we have searched for possible correlations for all known SNe occurring both before and after GRBs events, with different time windows. We show that these analyses are heavily affected by the positional inaccuracy of GRBs positions. We have also analysed possible correlations of various physical and observational parameters such as GRB time durations, GRB fluxes, SN magnitudes, SN redshifts, etc. Although promising temporal and positional coincidences have been found in few cases, we are unable to provide any kind of direct observational evidence that the two phenomena are physically related. We have also studied whether there may be unrecognized optical afterglows (of GRBs) among detected SNe. No positive case has been revealed, but these results are affected by lack of suitable optical data for faint SNe.

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