GCN Circular 40510
Subject
GRB 250502A: Tautenburg observations
Event
Date
2025-05-21T14:09:26Z (2 months ago)
From
Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>
Via
email
K. Kritik, L. Berthel, T. Ranganathan, J. Kahl, S. Schmidl (all FSU Jena),
M. Hartmann, B. Stecklum, S. Klose (all Tautenburg) report:
We observed the field of GRB 250502A (Wang et. al., GCN 40313) with
the 1.3m Schmidt telescope using the prime focus CCD
camera. Observations started on May 2, 2025, at 22:18:13 UT, about
13.5 hrs after the SVOM trigger, at a mean airmass of 2.2.
The optical transient first reported by Rakotondrainibe et. al. (GCN
40315) was clearly detected. Based on 40 min of exposure, at a midtime
of 22:38 UT, we measure a preliminary r-band magnitude (AB) of 20.88
+/- 0.20 mag, calibrated against Pan-STARRS DR1. We apologize for the
late submission of this circular.