TITLE: GCN CIRCULAR NUMBER: 42257 SUBJECT: GRB 251014A: DDOTI Upper Limit DATE: 25/10/14 13:52:43 GMT FROM: Rosa Leticia Becerra Godínez at Tor Vergata, Roma rbecerra@astro.unam.mx
Rosa L. Becerra (U Roma), Alan M. Watson (UNAM), Camila Angulo Valdez (UNAM), Sahil Atri (U Roma), Nat Butler (ASU), Simone Dichiara (Penn State University), Tsvetelina Dimitrova (ASU), Alexander Kutyrev (GSFC/UMD), William H. Lee (UNAM), Océlotl López (UNAM), Margarita Pereyra (UNAM) and Eleonora Troja (U Roma) report:
We observed the field of GRB 251014A detected by Fermi/GBM (Fermi GBM Team, GCN Circ. 42237) and Swift (Ambrosi et al., GCN Circ. 42238) with the DDOTI/OAN wide-field imager at the Observatorio Astronómico Nacional on Sierra San Pedro Mártir (http://ddoti.astroscu.unam.mx) on the night of 2025-10-14 UTC.
DDOTI observed the Swift/BAT position (Ambrosi et al., GCN Circ. 42238) from 09:12 UTC to 12:27 UTC (from T+8.7 h to T+ 11.9 h after the trigger), obtaining a total exposure of 70 minutes, alternating with other scientific programs.
Comparing our observations to the USNO-B1 and Pan-STARRS PS1 DR2 catalogues, we detect no uncatalogued fading sources within the observed field down to a 5-sigma limiting AB magnitude of:
w >20.3
This value is consistent with the reported by the SAO RAS collaboration (Moskvitin et al. GCN Circ. 42250) and is not corrected for the Galactic extinction.
We thank the staff of the Observatorio Astronómico Nacional on the Sierra of San Pedro Mártir.
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