[vsnet-grb-info 19483] GRB 170604A: AbAO optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Jun 6 00:49:07 JST 2017
TITLE: GCN CIRCULAR
NUMBER: 21203
SUBJECT: GRB 170604A: AbAO optical observations
DATE: 17/06/05 15:48:31 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at iki.rssi.ru>
E. Mazaeva (IKI), R. Inasaridze (AbAO), A. Pozanenko (IKI), A. Volnova
(IKI), V. Ayvazian (AbAO), O. Kvaratskhelia (AbAO), G. Inasaridze
(AbAO), I. Molotov (KIAM), report on behalf of larger GRB follow-up
collaboration:
We observed the field of the Swift GRB 170604A (Page et al., GCN 21191)
with AS-32 (0.7m) telescope of Abastumani Observatory starting on
June, 04 (UT) 23:52:07. We obtained several unfiltered images of the
field. Within enhanced XRT error circle (Page et al., GCN 21196) we
detected the afterglow (Izzo et al, GCN 21192; Izzo et al, GCN 21197;
Schady, , GCN 21200). Preliminary photometry of the afterglow is following
Date UT start t-T0 Filter Exp. OT Err UpLim (3 sigma)
(mid, days) (s)
2017-06-04 23:52:07 0.19950 CR 5*60 19.13 0.18 21.0
2017-06-05 00:00:50 0.20675 CR 7*60 19.23 0.16 21.1
2017-06-05 00:13:02 0.21885 CR 13*60 19.30 0.22 20.6
Photometry is based on nearby USNO-B1.0 stars (R2 magnitudes)
USNO-B.1_id R2
0746-0830331 14.71
0746-0830367 14.76
0746-0830438 15.14
0746-0830455 14.77
0747-0821123 14.60
05.06.2017 18:43, Alexei Pozanenko пишет:
> E. Mazaeva (IKI), R. Inasaridze (AbAO), A. Pozanenko (IKI), A. Volnova
> (IKI), V. Ayvazian (AbAO), O. Kvaratskhelia (AbAO), G. Inasaridze
> (AbAO), I. Molotov (KIAM), report on behalf of larger GRB follow-up
> collaboration:
>
> We observed the field of the Swift GRB 170604A (Page et al., GCN
> 21191) with AS-32 (0.7m) telescope of Abastumani Observatory starting
> on June, 04 (UT) 23:52:07. We obtained several unfiltered images of the
> field. Within enhanced XRT error circle (Page et al., GCN 21196) we
> detected the afterglow (Izzo et al, GCN 21192; Izzo et al, GCN 21197).
> Preliminary photometry of the afterglow is following
>
> Date UT start t-T0 Filter Exp. OT Err UpLim (3 sigma)
> (mid, days) (s)
>
> 2017-06-04 23:52:07 0.19950 CR 5*60 19.13 0.18 21.0
> 2017-06-05 00:00:50 0.20675 CR 7*60 19.23 0.16 21.1
> 2017-06-05 00:13:02 0.21885 CR 13*60 19.30 0.22 20.6
>
> Photometry is based on nearby USNO-B1.0 stars (R2 magnitudes)
> USNO-B.1_id R2
> 0746-0830331 14.71
> 0746-0830367 14.76
> 0746-0830438 15.14
> 0746-0830455 14.77
> 0747-0821123 14.60
>
>
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