GCN Circular 19561
Subject
GRB 160623A: Mondy optical observations
Date
2016-06-24T11:59:19Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Pozanenko (IKI), E. Mazaeva (IKI), P. Minaev (IKI), E. Klunko
(ISTP), A. Volnova (IKI), I. Korobtsev (ISTP), report on behalf of
larger GRB follow-up collaboration:
We observed the field of the bright hard GRB 160623A initially reported
by GBM and LAT (Vianello et al., GCN 19553; Mailyan et al., GCN 19555)
and also observed by Konus-Wind (Frederiks et al., GCN 19554) and
SPI-ACS/INTEGRAL with AZT-33IK telescope of Sayan observatory (Mondy)
starting on June, 23 (UT) 18:21:25. We obtained several images in
R-filter under good weather conditions and FWHM of about 1.6 arcsec. At
the edge of XRT error circle (Mingo et al., GCN 19558) we detect a
source which is not presented in USNO-B1.0 and not visible in POSS2
(any filter). Coordinates of the source are (J2000) 21:01:11.57
+42:13:15.8 with uncertainty of 0.7 arcsec. Preliminary photometry is
following
t-T0 Filter Exp. OT(?) Err
(mid, days) (s)
0.56330 R 20*60 19.94 0.07
0.57720 R 20*60 19.94 0.07
0.59112 R 20*60 20.32 0.13
Photometry is based on nearby USNO-B1.0 star
USNO-B.1_id R2
1322-0479855 15.22
Despite a hint of some decaying of the source it is unclear whether
source is an afterglow of GRB 160623A.
A finding chart can be found in
http://grb.rssi.ru/GRB160623A/GRB160623A_160623_Mondy.png
A light curve of SPI-ACS/INTEGRAL can be found in
http://grb.rssi.ru/GRB160623A/GRB160623A_spi-acs.png
