TITLE: GCN CIRCULAR NUMBER: 42240 SUBJECT: GRB 20251013C: SLKT optical afterglow photometry DATE: 25/10/14 02:43:16 GMT FROM: Peter Garnavich at U of Notre Dame <pgarnavi@nd.edu> P. Garnavich (University of Notre Dame) reports: The Sarah L. Krizmanich Telescope (SLKT) obtained unfiltered observations of the SVOM/ECLAIRs source GRB 251013C (Rakotondrainibe et al., GCN 42222). Imaging was centered at 2025 October 14.002 (UT) which was 6.4 hours after the GRB trigger. Exposures totaled 320s and the afterglow was clearly detected. Compared to the nearby star at 23:03:20.64 -00:10:13.8 (2000) with a SDSS magnitude of r=14.40 mag, the afterglow had a brightness of r=17.48+/-0.06 mag. View this GCN Circular online at https://gcn.nasa.gov/circulars/42240. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...