GCN Circular 21001
Subject
GRB 170317A: SAO RAS optical observations
Date
2017-04-07T20:23:42Z (7 years ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
A. Moskvitin (SAO RAS), E. Mazaeva (IKI), A. Pozanenko (IKI),
A. Volnova (IKI), on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 170317A (LaPorte et al. GCN 20885)
with the SAO RAS telescope Zeiss-1000 + CCD photometer on March, 17
(18:12:00--19:58:03 UT). We obtained several images in Rc band.
The optical afterglow (LaPorte et al., GCN 20885;
Mazaeva et al., GCN 20886; Xin et al., GCN 20888;
Mao et al., GCN 20889; Kuroda et al., GCN 20899) is detected
in a stacked frame. Preliminary photometry is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2017-03-17 18:12:00 0.38823 Rc 15*300 22.3 0.3 22.6
Photometry is based on nearby USNO-B1.0 stars
previously used in GCN 20886.