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 28000

GRB 200613A: CrAO optical observations
2020-06-20T11:51:17Z (4 years ago)
Alexei Pozanenko at IKI, Moscow <>
S. Belkin (IKI), A. Pozanenko (IKI),�� V. Rumyantsev (CrAO),�� A. Volnova 
(IKI), E. Mazaeva (IKI) report on behalf of larger GRB follow-up 

We observed the�� GRB 200613A (Fermi GBM team, GCN 27926; Bissaldi et 
al., GCN 27930; Ohno et al., GCN 27931; Yamaoka Ohno et al., GCN 27964)�� 
with ZTSH 2.6m telescope of CrAO observatory starting on 2020-06-19 (UT) 
18:58:23.�� The optical afterglow (e.g., Kann et al., GCN 27935; 
Pozanenko et al., GCN 27937; Izzo et al., GCN 27939; Zhu et al., GCN 
27943; Marshall, GCN 27944; Liu et al., GCN 27949; Belkin et al., GCN 
27958) is detected in a stacked image. Preliminary photometry of the 
afterglow is following

Date������������ UT start�� t-T0������ Filter Exp.���� OT������ Err. UL
 �������������������������������������� (mid, days)�������� (s)
2020-06-19 18:58:23�� 6.58142 R���������� 29*120 21.06 0.09 23.6

The photometry is based on nearby SDSS star
SDSS-DR12_id���������� R(Lupton)
J101207.75+454443.4 17.877

A light curve of the afterglow of�� GRB 200613A can be found in
Looking for U.S. government information and services? Visit