GCN Circular 28273
Subject
GRB 200819A: Optical Observations from HCT
Event
Date
2020-08-20T16:13:01Z (6 years ago)
From
Anirban Dutta at Indian Inst. of Astrophysics <anirban.dutta@iiap.res.in>
Anirban Dutta(IIA, Bengaluru), Brajesh Kumar(ARIES, Nainital), Avinash
Singh, G. C.
Anupama, D. K. Sahu and Pramod Kumar (IIA, Bengaluru)
We observed the field of GRB 200819A (Dichiara et
al., GCN #28263; Evans et al., GCN #28265) with the Himalaya Faint
Object
Spectrograph and Camera (HFOSC) mounted on the 2-m Himalayan Chandra
Telescope (IAO, Hanle, India). Multiple frames (each 300 sec) of the GRB
field in Bessell R and I bands were obtained with an average airmass of
1.3
and a seeing of 2''. Preliminary PSF photometry on the stacked
images was performed and calibrated against USNO-B1 catalogue. We do
not
detect any OT within the enhanced XRT position (Belkin et al., GCN
#28266; Jelinek et al., GCN #28267).
The estimated limiting magnitude is as under -
Date | UT (mean) | Filter | Exp time x no. of
frames | Upper limit (mag)
2020-08-19 19:16:23 R 300 sec x 4
21.5
2020-08-19 19:32:37 I 300 sec X 4
20.3
We thank the staff at IAO and CREST for helping with the observations.