GCN Circular 21113
Subject
GRB 170519A: iTelescope T11 optical observations
Date
2017-05-19T15:42:57Z (8 years ago)
From
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <veli-pekka.hentunen@kassiopeia.net>
Veli-Pekka Hentunen and Markku Nissinen (Taurus Hill Observatory (A95),
Varkaus, Finland) report:
We have detected GRB 170519A optical afterglow at iTelescope observatory
T11 (Mayhill, New Mexico) using 0.51-m/6.8 Planewave CDK telescope and
FLI ProLine PL11002M CCD camera. The observations were started at
2017-05-19 05:25:24 (UT). Eleven unfiltered images and seven photometric
R filter images with 120 sec exposure time were taken.
The optical afterglow was detected at the position RA 10:53:42.46
and DEC +25:22:27.4.
The following magnitudes were obtained from the observations using
NOMAD1 1153-0183949 (R = 12.650) as a comparison star:
Tmid(s)+T0 Filter Exp. time Mag Mag err.
1119 unfiltered 3x120 15.52CR 0.03
1452 unfiltered 2x120 15.63CR 0.03
1906 R 3x120 15.98R 0.10
2324 R 2x120 16.08R 0.11
2806 unfiltered 4x120 16.07CR 0.05
3327 unfiltered 2x120 16.17CR 0.05
3795 R 2x120 16.50R 0.16
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