3 Preliminary results

The number of correlations found (24 SN and 29 GRBs - in five cases there are two GRBs consistent with particular SNe) is consistent with the assumption of unrelated samples (both statistical as well as systematic errors of GRBs taken into account; for more details on the statistical procedures see Hudec et al. 1999). Moreover, we have considered the possible correlations with GRBs of SN 1990aj and SN 1993R (Patat & Piemonte 1998), based on their spectra similar to SN 1998bw. The SN 1993R is included in the list of positive correlations and may be related to GRB 930524; although this correlation is rather weak due to the large error box of this GRB. For the SN 1990aj, no positional GRB catalogues are available.

3.1 Examples of correlations found

The full results and their discussion will be published elsewhere (Hudec et al. 1999). In the following we list a few most promising correlations.

  

Figure 1: Angular distribution of historical supernovae in galactic coordinates

3.1.1 SN 1998B

The supernova reached $\sim$18.5 mag at the time of detection (Jan. 1, 1998). Spectrum SNIa 3-4 weeks after maximum, z=0.045, possibly related to GRB 971218.

3.1.2 SN 1996bx

$R \sim 19.2$ at the time of detection (Nov. 18, 1996), SN Ia 3-4 weeks after maximum, z=0.058, possibly related to GRB 961029.

3.1.3 SN 1995bc

$\sim$18.5 mag at the time of the detection (Dec. 1, 1995), spectrum SN II, z=0.048, possibly related to GRB 951107.

3.1.4 SN 1991aa

$\sim$16 mag at the time of the detection (May 7, 1991), spectrum SN Ib, possibly related to GRB 910423.

3.1.5 SN 1992Q

$\sim$18.5 mag at the time of the detection (April 7, 1992), blue object, possibly related to GRB 920321.