GCN Circular 27481
Subject
GRB 200325B: Mondy continued observations
Date
2020-04-03T08:42:32Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), M. Eselevich
(ISTP), E. Mazaeva (IKI), A. Volnova (IKI) report on behalf of IKI-GRB-FuN:
We continued observations of the MASTER OT J111012.51+274912.8
(Lipunov et al., GCN 27446) which is now is confirmed afterglow
(Pozanenko et al., GCN 27452; Strausbaugh et al., GCN 27456; Klose et
al., GCN 27464; D'Ai et al., GCN 27471) of the Fermi GRB 200325B
(Fermi GBM team, GCN 27441) with AZT-33IK 1.5-m telescope of Sayan
observatory (Mondy).
Preliminary photometry of the OT is following.
Date UT start t-T0 Filter Exp. OT Err UL(3sigma)
(mid, days) (s)
2020-03-30 15:07:22 5.03063 R 30*120 22.40 0.20 22.7
2020-03-31 17:09:44 6.11561 R 30*120 22.45 0.17 22.8
2020-04-01 16:40:59 7.10254 R 40*120 n/d n/d 22.6
the photometry is based on nearby SDSS-DR12 stars
RA DEC R(Lupton transformations)
167.569191 27.848262 16.015
167.513655 27.832992 16.930
167.510507 27.850424 15.261
A light curve of the GRB 200325B afterglow based on our observations
(Belkin et al., GCNs 27455, 27465, 27467, 27468) can be found at
http://grb.rssi.ru/GRB200325B/GRB200325B_lc.png