GCN Circular 28915
Subject
GRB 201116A: OSN Afterglow Candidate
Date
2020-11-17T04:36:25Z (4 years ago)
From
Alexander Kann at IAA-CSIC <kann@iaa.es>
A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), D. A. Kann, M. Blazek,
C. C. Thoene, J. F. Agui Fernandez (all HETH/IAA-CSIC), and A. Sota
(IAA-CSIC) report:
We observed the location of the Swift XRT source #3 found in tiled Swift
observations (Evans, GCN #28906), potentially the (X-ray) afterglow of
Fermi GBM/LAT GRB 201116A (Fermi GBM Team, GCN #28897; Kunzweiler et
al., GCN #28898; Axelsson et al., GCN #28907) with the 1.5m telescope of
the Observatorio Sierra Nevada, in Granada, Spain. We obtained 15 x 180
s images in Rc, beginning 2020-11-17 03:24:46.56 UT, 1.1076 days after
the GRB.
We detect a faint source in the Rc-band stack at (J2000)
RA = 09:57:17.94
Dec. = +00:16:34.1
with Rc = 23.18 +/ 0.18 mag (AB), as measured against multiple SDSS
comparison stars.
This source is not visible in SDSS or PanSTARRS imaging, suggesting it
is the GRB afterglow. We cannot determine evidence for fading, however.
We wish to congratulate the SpaceX Crew-1 astronauts for their
successful arrival at the ISS.