GCN Circular 11173
Subject
GRB 100901A: THO optical observations
Date
2010-09-02T08:55:23Z (14 years ago)
From
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <veli-pekka.hentunen@kassiopeia.net>
Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill
Observatory, Varkaus, Finland) report:
Taurus Hill Observatory (A95, Varkaus, Finland) C-14 telescope and SBIG
ST-8XME CCD camera were used to detect GRB 100901A optical afterglow.
The observations were started at 2010-09-01 21:08:30 (UT) and stopped at
2010-09-02 01:11:13 (UT). A number of unfiltered and BVR observations with
varying exposure times were made. The afterglow was detected at following
position RA 1 49 03.45 and DEC +22 45 30.5 consistent those given by Immler
s. et al. (GCN 11159) and Guidorzi C. et al. (GCN 11160) to within positional
errors.
The following magnitudes were obtained from the observations using USNO-B1.0
1127-0027231 (R = 15.37 and B = 16.38)) as the comparison:
+T0 (hour) Filter Exp (sec) Mag Mag err Limit
7.606 unfiltered 2x120 17.1 0.1 18.4
7.678 unfiltered 2x120 17.2 0.2 18.5
10.607 unfiltered 3x300 17.3 0.1 19.6
11.141 Rc 3x300 17.4 0.1 20.0
11.228 B 3x300 18.1 0.2 19.1
A jpg color image of the 4x300sec observations is available at the
following URL:
http://cutenews.kassiopeia.net/data/upimages/GRB100901A_LRGB_web_nuoli.jpg
