Physics
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ncimc..28..549s&link_type=abstract
Il Nuovo Cimento C, vol. 28, Issue 4, p.549
Physics
Scientific paper
We find that although the absolute magnitude of the optical afterglow (OA) of GRB011121 in the late phase ( t - T 0 > 10 days) is approximately consistent with that of the SN 1998bw-type supernova SN 2001ke, previously found by Garnavich P. M. et al. (ApJ, 582 (2003) 924), a good match of their colors occurs only for t - T 0 = 13-23 days in the observer frame of GRB011121. We are able to constrain the possible SN in the OA of GRB010222 to be of the peculiar SN 1998bw or SN 2002ap type, but not of SNe classified as Type Ic in the database of Poznanski D. et al. (PASP, 114 (2002) 833). Neither colors nor absolute magnitude of the OA of GRB970508 in the late phase are consistent with those of any of the above-mentioned (sub)types of SN. These results imply that the bumps in the late phase of the OAs can be caused by several mechanisms. Color indices thus appear to be a powerful tool in the analysis of these phenomena, even for archival data of OAs.
Hudec Rene
Pizzichini Graziella
Simon Veronica
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