TITLE: GCN CIRCULAR NUMBER: 38469 SUBJECT: GRB 241206A: DDOTI Upper Limit on the Afterglow DATE: 24/12/08 16:02:20 GMT FROM: Rosa L. Becerra at Tor Vergata, Roma rosa.becerra@roma2.infn.it
Rosa L. Becerra (Tor Vergata, Roma), Alan M. Watson (UNAM), Eleonora Troja (Tor Vergata, Roma), Camila Angulo Valdez (UNAM), Nat Butler (ASU), Simone Dichiara (Penn State University), Tsvetelina Dimitrova (ASU), Alexander Kutyrev (GSFC/UMD), William H. Lee (UNAM), Océlotl López (UNAM), and Margarita Pereyra (UNAM) report:
We observed the field of the GRB 241206A detected by Fermi/GBM (Fermi GBM Team, GCN 38447) and Swift/BAT-GUANO (DeLaunay et al., GCN 38453) with the DDOTI/OAN wide-field imager at the Observatorio Astronómico Nacional on Sierra San Pedro Mártir (http://ddoti.astroscu.unam.mx) on 2024-12-08 from 09:51 to 13:14 UTC (45.7 to 49.2 hrs after the event), obtaining a total of 1.7 hours of exposure in the w filter down to a 10-sigma limiting magnitude of w = 20.5.
Comparing our observations to the USNO-B1 and PanSTARRS PS1 DR2 catalogues, we detect no uncatalogued sources within the observed field to our 10-sigma limit within the error radius reported by Fermi/GBM (Fermi GBM Team, GCN 38447).
We thank the DDOTI technical team and the staff of the Observatorio Astronómico Nacional.
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