GCN Circular 11742
Subject
GRB 110213A: optical observations in Mondy
Date
2011-02-16T19:00:13Z (13 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (SAI MSU), A. Pozanenko (IKI), I. Korobtsev (ISTP), E. Klunko
(ISTP) on behalf of larger GRB follow up collaboration report:
We observed the Swift GRB 110213A (D'Elia et al., GCN 11705) with AZT-33IK
telescope of Sayan observatory (Mondy) between Feb.13 (UT) 11:23 - 13:21
(Korobtsev et al., GCN 11713) and Feb. 15 (UT) 11:55 - 12:55. We took
several series in both epochs in R filter. The optical afterglow (D'Elia et
al., GCN 11705, Cenko GCN 11706, Rujopakarn et al., GCN 1707) is clearly
visible on single 60 s exposure images on Feb. 13, and afterglow is visible
in a stacked image on Feb. 15. During our observations within 2 hours on
Feb. 13 (0.2555 - 0.3316 days after burst) the brightness of the afterglow
was not changing within error bars of about 0.06m. One can suggest that we
observed a plateau phase or a broad peak of the afterglow light curve. The
afterglow is still bright (R ~ 20.45) at 2.297 days after burst.
The photometry based on the USNO-B1.0 star 1392-0070724 (J2000) RA=02 51
53.41, Dec= +49 16 02.9, assuming R=16.83:
T0+ Filter, Exposure, OT mag.,
(mid, d) (s)
0.2555 R 4x60 17.61 +/- 0.06
0.3260 R 4x60 17.76 +/- 0.07
2.2973 R 3600 20.45 +/- 0.12
The photometry above is still preliminary.
[GCN OPS NOTE(30apr11): Per author's request, Elunko was changed to Klunko.]