[vsnet-grb-info 26287] GRB200907A: GROWTH-India optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28387
SUBJECT: GRB200907A: GROWTH-India optical upper limit
DATE:    20/09/07 22:25:42 GMT
FROM:    Harsh Kumar at Indian Inst of Tech,Bombay  <harshkosli13 at gmail.com>

H. Kumar (IITB), P. Dorje (IIA), V. Bhalerao(IITB), G. C. Anupama(IIA), S.
Barway(IIA), report on behalf of the GROWTH-India collaboration:

We observed GRB200907A reported by Swift-BAT (A.P. Beardmore et al., GCN
#28384, P.A. Evans et al., GCN #28385) with 0.7m GROWTH-India telescope.
The field was observed in the SDSS r filter starting at
2020-09-07T20:59:05.36 UT i.e. ~2.1 hrs after the event detection by
Swift-BAT. We didn’t find any new source in stacked image of 7*500 sec
exposure, within an uncertainty region of 2.2 arcsec around RA(J2000) =
05:56:06.93, Dec(J2000)= +06:54:22.8 (GCN 28385) up to r > 20.83 mag
(5-sigma)(Calibrated against PanSTARRs PS1 data release, Flewelling et al.,
2018)


The GROWTH India Telescope (GIT) is a 70-cm telescope with a 0.7-degree
field of view, set up by the Indian Institute of Astrophysics and the
Indian Institute of Technology Bombay with support from the Indo-US Science
and Technology Forum (IUSSTF) and the Science and Engineering Research
Board (SERB) of the Department of Science and Technology (DST), Government

of India (https://sites.google.com/view/growthindia/). It is located at the
Indian Astronomical Observatory (Hanle), operated by the Indian Institute
of Astrophysics (IIA).