{
  "bibcode": "2020GCN.26911....1P",
  "body": "Margarita Pereyra (UNAM), Nat Butler (ASU), Alan M. Watson (UNAM),\n Eleonora Troja (GSFC/UMD),  Diego Gonzalez (UNAM), Alexander Kutyrev\n(GSFC/UMD), William H. Lee (UNAM), and Tanner Wolfram (ASU), Simone\nDichiara (GSFC/UMD) report:\n\nWe observed the field of GRB 200125B detected by Fermi Gamma-ray Burst\nMonitor (Fermi GBM Team, GCN Circ. 26879, Veres et al., GCN Circ. 26893),\nwith the DDOTI/OAN wide-field imager at the Observatorio Astron��mico\nNacional on Sierra San Pedro M��rtir (http://ddoti.astroscu.unam.mx) from\n2020-01-26 02:18 to 2020-01-26 06:53 UTC (5.58 to 10.16 hours after the\nevent).\n\nWe observed a region of 6.8 degrees in RA by 10.2 degrees in declination\ncentered on the GBM Final Position 00:29:47 +64:41:22 J2000. This region\ncontains about 70 square degrees. We obtained about 3.1 hrs total exposure\nacross the region.\n\nWe calibrated our images against the APASS catalog. Our 10-sigma limiting\nmagnitude is w = 20.04 for a 2.0 degrees radius error region centered at\nthe GBM Final Position. Comparing to the USNO-B1 and PAN-STARRS DR1\ncatalogs we do not detect any uncataloged source with significant fading or\nrising to our 10-sigma limit.\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nM��rtir.\n-- \n*Dr. Margarita Pereyra *\n\n*FFTF, Schlumberger Foundation Alumnae*\n----------------------------------------------------------------------------------------------------------------\n\n*Catedr��tico Conacyt*\n\n*Instituto de Astronom��a de la UNAM,*\n\n*Km. 107 Carretera Tijua**na-Ensenada, *\n\n*Ensenada Baja California, M��xico. C.P. 22860*\n\nOficina: 405\n\nSkype: margarita-pereyra",
  "circularId": 26911,
  "createdOn": 1580191463000,
  "email": "mpereyra@astro.unam.mx",
  "subject": "GRB 200125B: DDOTI/OAN  optical observations report",
  "submitter": "Emma Margarita Pereyra Talamantes at IA-UNAM Ensenada  <mpereyra@astro.unam.mx>",
  "eventId": "GRB 200125B"
}