Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 27605

GRB 200412B: continued Terskol optical observations
2020-04-19T13:50:32Z (4 years ago)
Alexei Pozanenko at IKI, Moscow <>
S. Belkin (IKI), A. Pozanenko (IKI), A.V. Shein (INASAN), I.A. Izvekova 
(ICAMER NASU), E. Mazaeva (IKI), A. Volnova  (IKI) report on behalf of 

We observed the field of GRB 200412B (Fermi GBM team, GCN 27547; Mailyan
et al., GCN 27558; see also Burgess et al., GCN 27548; Longo et al., GCN
27557; Page et al., GCN 27561; Gupta et al., GCN 27563; Zheng et al., 
GCN 27565)  with Zeiss-2000 of Mt.Terskol observatory.  We  marginally 
detected  the afterglow of GRB 200412B  (Lipunov et al., GCNs 27555, 
27556; see also e.g. Kumar et al., GCN 27564; Belkin et al., GCN 27566, 
Stecklum et al., GCN 27567, Moskvitin GCN 27570; Xin  et al., GCN 
27571).  Preliminary photometry of the afterglow is following.

Date       UT start  t-T0       Filter  OT Err. UL   Observatory
                     (mid, days)
2020-04-18 19:52:22 6.47687 43*120 R 23.6 0.3 23.6 Terskol Z-2000

The photometry is based on nearby USNO-B1.0 stars.
The update light curve can be found at
Looking for U.S. government information and services? Visit