Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 19775

GRB 160804A: ISON/UAFO optical observations
2016-08-05T15:40:06Z (8 years ago)
Alexei Pozanenko at IKI, Moscow <>
E. Mazaeva (IKI),  E. Chornaya (UAFO, ISON), A. Matkin (UAFO), I. 
Molotov (KIAM), A. Pozanenko (IKI) report on behalf of  larger GRB 
follow-up collaboration:

We observed the field of GRB 160804A  (Marshall et al., GCN 19761)  with 
SANTEL-650 (0.65m)  telescope  of UAFO/ISON-Ussuriysk observatory. We 
obtained several unfiltered images  starting on  August 04 (UT) 
12:03:56.  We clearly detected  optical source reported by Breeveld et 
al. (GCN 19764), Tyurina et al. (GCN 19768), Malesani et al. (GCN 
19770), Moskvitin et al. (GCN 19771), Xu et al. (GCN #19773) and Bolmer 
et al. (GCN 19774). Preliminary photometry of a combined image is following

Date       UT start   t-T0   Filter   Exp.  OT     Err.  UL
                       (mid, days)     (s)

2016-08-04 12:03:56 0.46189  CR      60*120 19.90  0.27  21.6

Photometry is based on nearby SDSS DR9 stars
SDSS-DR9_id    R(Lupton)
J144642.43+100147.7    18.068
J144642.15+100017.4    17.644
J144638.04+095917.6    17.971
J144635.67+095910.6    18.378
J144619.22+095958.1    16.677
J144616.60+100018.4    16.575
J144614.88+100001.4    16.544
Looking for U.S. government information and services? Visit