{
  "body": "B. Schneider (LAM), D. B. Malesani (DAWN/NBI and Radboud), D. Xu (NAOC), S. Bijavara Seshashayana (NOT and Malmo Univ.) report on behalf of a larger collaboration:\n\nWe observed the field of GRB 251103A (Hu et al., GCN 42534) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC imager. Observations started on 2025-11-03 at 05:25:50 UT (39.5 min after trigger) and consisted of 2x300 s in the SDSS r band.\n\nWithin the ECLAIRs error circle, we detect a new source which is not seen in Pan-STARRS archival imaging of this field. Its coordinates are:\n\nRA(J2000) = 09:47:21.41\nDec(J2000) = +16:07:21.8\n\nwith an estimated error of 0.3\". Calibrated against nearby objects from Pan-STARRS, we measure AB magnitudes (not corrected for Galactic extinction):\n\nr = 17.07 +/- 0.03\n\nFurther observations are ongoing.",
  "bibcode": "2025GCN.42535....1S",
  "submitter": "Benjamin Schneider at MIT <bschn@mit.edu>",
  "subject": "GRB 251103A: NOT optical afterglow candidate",
  "createdOn": 1762149432234,
  "editedOn": 1762187023340,
  "submittedHow": "web",
  "editedBy": "Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Benjamin Schneider at MIT <bschn@mit.edu>",
  "format": "text/plain",
  "eventId": "GRB 251103A",
  "version": 2,
  "circularId": 42535
}