[vsnet-grb-info 9915] GRB 101024A: GRAS06 optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11373
SUBJECT: GRB 101024A: GRAS06 optical observations
DATE:    10/10/24 14:59:45 GMT
FROM:    Veli-Pekka Hentunen at Taurus Hill Obs,A95  <veli-pekka.hentunen at kassiopeia.net>

Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill
Observatory, Varkaus, Finland) report:

GRAS06 (Global-Rent-a-Scope, Moorook, Australia) RCOS-16 telescope 
and SBIG STL-1001E CCD camera were used to detect GRB 101024A 
optical afterglow. The observations were started at 2010-10-24 11:58:06 (UT) 
and stopped at 2010-10-24 12:30:00 (UT). Three unfiltered observations
with 600s exposure times were made. The afterglow was detected at
following position RA 04 26 01.43 and DEC -77 15 55.9 consistent those
given by Evans P.A. et al. (GCN 11370) to within positional errors.

The following magnitudes were obtained from the observations using 
NOMAD1 0127-0023968 (V = 16.94) as the comparison:

Tmid(s) + T0    Filter            Exp (sec)    Mag      Mag err   Limit
1416                unfiltered       600            19.2      0.4          21.0
2074                unfiltered       600            20.8      0.8          21.0
2730                unfiltered       600          >21.0                     21.0

A jpg image of the 600sec observations is available at the following
URL: http://cutenews.kassiopeia.net/data/upimages/GRB101024A.png