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GCN Circular 11352

Subject
GRB 101008A: optical observations
Date
2010-10-18T10:06:08Z (14 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
V. Rumyantsev (CrAO),  A. Pozanenko (IKI)  report on behalf of larger GRB
follow-up collaboration:

We observed  the field  of the Swift GRB 101008A (Baumgartner et al., GCN
11318) with ZTE telescope of SAI MSU observatory on Oct. 12 (UT) 18:57 -
20:42. We clearly detect objects S1 and S3 (Moskvitin  et al., GCN 11324) in
coordinates (J2000) RA=21 55 29.91, Dec=+37 03 56.6 and RA=21 55 29.85,
Dec=+37 04 05.0, correspondingly. We do not detect the object  S2
(Moskvitin  et al., GCN 11324; Nardini et al., GCN 11326). The photometry is
based on the same USNO star as Moskvitin et al.

Source,  T0+,     Filter,   Exposure,    mag.,        Upper Limit (3 sigma)
             (mid, d)              (s)

S1        4.1297    R       97x60           21.0 +/- 0.1      22.4
S2        4.1297    R       97x60           21.6 +/- 0.2      22.4

Since we do not detect the afterglow candidate S2 up to R=22.4 we can
confirm the GRB 101008A afterglow detection.
The finding chart can be found at
http://grb.rssi.ru/GRB101008A/GRB101008a_101012_ZTE.gif
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