[vsnet-grb-info 16503] GRB 150413A: CrAO optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Apr 29 04:48:02 JST 2015
TITLE: GCN CIRCULAR
NUMBER: 17784
SUBJECT: GRB 150413A: CrAO optical observations
DATE: 15/04/28 19:47:55 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at iki.rssi.ru>
V. Rumyantsev (CrAO), K. Antoniuk (CrAO), E. Mazaeva (IKI), A.
Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the GRB 150413A (Markwardt et al., GCN 17688)
with AZT-11 telescope of CrAO observatory starting on Apr. 13 (UT)
17:39:02. Several images were take in R-filter. The afterglow (Ivanov
et al., GCN 17689) is clearly detected in all single images of 180 s
exposure. Preliminary photometry is following
Date, UT start, OT, OT_err
2015-04-13 17 40 32.11 16.56 0.12
2015-04-13 17 43 36.17 16.97 0.30
2015-04-13 17 46 40.21 16.48 0.07
2015-04-13 17 49 44.26 16.73 0.11
2015-04-13 17 52 48.30 16.48 0.15
2015-04-13 17 55 52.37 16.62 0.13
2015-04-13 17 58 56.41 16.74 0.09
2015-04-13 18 02 00.58 16.63 0.13
2015-04-13 18 05 04.68 16.78 0.10
2015-04-13 18 08 08.76 16.77 0.09
2015-04-13 18 11 12.83 16.63 0.07
2015-04-13 18 14 16.87 16.74 0.06
2015-04-13 18 17 20.95 16.74 0.04
2015-04-13 18 20 25.30 16.76 0.06
2015-04-13 18 23 29.10 16.77 0.10
2015-04-13 18 26 33.15 16.90 0.08
2015-04-13 18 29 37.20 16.74 0.07
2015-04-13 18 32 41.25 16.71 0.05
2015-04-13 18 35 45.30 16.78 0.04
2015-04-13 18 38 49.36 16.77 0.03
2015-04-13 18 44 31.44 16.88 0.03
2015-04-13 18 47 35.48 16.81 0.03
2015-04-13 18 50 39.57 16.87 0.03
2015-04-13 18 53 43.66 16.92 0.03
2015-04-13 18 56 47.73 16.98 0.03
2015-04-13 18 59 51.90 17.02 0.03
2015-04-13 19 02 55.98 16.95 0.04
2015-04-13 19 06 00.64 16.94 0.04
2015-04-13 19 09 04.22 17.08 0.07
2015-04-13 19 12 08.35 17.05 0.06
The photometry is based on nearby USNO-B1.0 1618-0098185 (Xu et al.,
GCN 17693) assuming R=15.59.
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