GCN Circular 4842
Subject
GRB060218/SN 2006aj: optical observation
Event
Date
2006-02-28T10:44:29Z (20 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Pavlenko, Yu. Efimov, A. Shlyapnikov, V.Rumyantsev (CrAO), A.Pozanenko
(IKI) on behalf of a larger collaboration report:
We observed GRB 060218/SN 2006aj (Cusumano et al. GCN 4775) with CrAO Shajn
2.6m telescope on Feb. 23. A series of BVRI 30 s exposures were taken
starting (UT) 19:27.
Using SDSS pre-burst observations (Cool et al. GCN 4777) we estimate
brightness of the optical afterglow + SN in R:
Mid time, exp., R mag
(UT) (s)
Feb.23 19:32 8x30 s 17.40 +/- 0.01
Feb.23 19:58 8x30 s 17.41 +/- 0.01
The values is compatible with the brightening rate ~0.2 per day between Feb.
20 and Feb. 23 reported earlier (Ovaldsen et al, GCN 4818, Pavlenko et al,
GCN 4838).