TITLE: GCN CIRCULAR NUMBER: 40510 SUBJECT: GRB 250502A: Tautenburg observations DATE: 25/05/21 14:09:26 GMT FROM: Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de> 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. View this GCN Circular online at https://gcn.nasa.gov/circulars/40510. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...