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GCN Circular 8461

SGR 0501+4516: optical observations in August
2008-11-02T13:48:28Z (15 years ago)
Alexei Pozanenko at IKI, Moscow <>
V. Rumyantsev,  S. Artemenko (CrAO), A. Pozanenko (IKI), A. J. Castro-Tirado
(IAA-CSIC Granada),  report on behalf of larger GRB follow-up collaboration:

We observed the field of   SGR 0501+4516 (Holland et al. GCN 8112, Barthelmy
et al. GCN 8113), in I band on August   26-28 with Shajn telescope of  CrAO.
The observation epochs are 2008-08-26T23:17:51 -- 2008-08-27T00:05:51 and
2008-08-27T23:27:32 -- 2008-08-28T00:31:32. We do not detect NIR/optical
counterpart of SGR 0501+4516 (Tanvir et al, GCN 8126, Rea et al, GCN 8159,
Fatkhullin et al, GCN 8160) in the first epoch, while in the second epoch
(Aug. 27.9993) one may suggest a presence of counterpart. Upper limits of
combined images are following:

Mean epoch,   Exposure, UL (3sigma)

Aug. 26.9874  60x34     22.8
Aug. 27.9993  60x60     23.6
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