GCN Circular 33330
Subject
GRB 230216A: AKO Upper Limit
Date
2023-02-16T17:17:11Z (a year ago)
From
Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>
Mohammad Odeh of Al-Khatim Observatory (AKO) operated by the International
Astronomical Center, in Abu Dhabi, UAE.
As a follow up for the GRB 230216A detected by Swift (GCN 33328), we
observed the field of the GRB with our 0.35m f/7.7 robotic telescope. The
observation was done on 16 February 2023 from 16:39:17 to 16:51:39 (UT), 1.8
hours after the GRB trigger. We obtained multiple 180-sec exposures in Ic
filter. We did not detect any afterglow within XRT localization. Though, the
star USNO-B1 0819-0175793 lies within the XRT error box, which might hide a
possible afterglow. This is consistent with the report of (Gendre et al.,
GCN 33329).
The following upper limit was calculated using Atlas catalogue as a
reference:
----------------------------------------------------------------------------
-
JD (mid), T_mid-T0(hrs), Exposure (sec), Filter, Lim_mag
----------------------------------------------------------------------------
-
2459992.199329, 1.8, 3 x 180 (stacked), Ic, > 19.3
----------------------------------------------------------------------------
-
These magnitudes are not corrected for galactic extinction.