GCN Circular 21162
Subject
GRB 170519A: ISON/Multa optical observations
Date
2017-05-29T18:41:18Z (7 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Krylov (KIAM), Yu. Krylova (KIAM), S. Schmalz
(KIAM), A. Volnova (IKI), A. Pozanenko (IKI) report on behalf of larger
GRB follow-up collaboration:
We observed the field of GRB 170519A (Ukwatta et al., GCN 21106) with
22cm SSS-220 telescope of ISON/Multa observatory(* starting on May 19
(UT) 16:02:54. We took 120 unfiltered frames with 60 s exposure. The
optical transient (Ukwatta et al., GCN 21106; Izzo, et al., GCN 21108)
is clearly detected in a combined image.
Preliminary photometry of the combined image is following
Date UT start t-T0 Filter Exp. OT err UL
(mid, days) (s) (3sigma)
2017-05-19 16:02:54 0.53936 CR 120*60 18.92 0.28 19.0
The photometry is based on nearby SDSS stars:
SDSS-DR9_id R(Lupton)
J105316.02+252545.1 16.75
J105332.97+252127.3 16.22
J105336.13+251707.2 15.46
J105322.03+251651.0 15.91
J105339.27+251620.6 16.66
J105338.87+252621.2 16.00
*) The ISON/Multa observatory is located in Altai, N 50d 10��� 07��� E 85d
57��� 25���. The SSS-220 telescope (22 cm, f/2.3) is equipped with CCD
camera ML 11002.