GCN Circular 26911
Subject
GRB 200125B: DDOTI/OAN optical observations report
Date
2020-01-28T06:04:23Z (5 years ago)
From
Emma Margarita Pereyra Talamantes at IA-UNAM Ensenada <mpereyra@astro.unam.mx>
Margarita Pereyra (UNAM), Nat Butler (ASU), Alan M. Watson (UNAM),
Eleonora Troja (GSFC/UMD), Diego Gonzalez (UNAM), Alexander Kutyrev
(GSFC/UMD), William H. Lee (UNAM), and Tanner Wolfram (ASU), Simone
Dichiara (GSFC/UMD) report:
We observed the field of GRB 200125B detected by Fermi Gamma-ray Burst
Monitor (Fermi GBM Team, GCN Circ. 26879, Veres et al., GCN Circ. 26893),
with the DDOTI/OAN wide-field imager at the Observatorio Astron��mico
Nacional on Sierra San Pedro M��rtir (http://ddoti.astroscu.unam.mx) from
2020-01-26 02:18 to 2020-01-26 06:53 UTC (5.58 to 10.16 hours after the
event).
We observed a region of 6.8 degrees in RA by 10.2 degrees in declination
centered on the GBM Final Position 00:29:47 +64:41:22 J2000. This region
contains about 70 square degrees. We obtained about 3.1 hrs total exposure
across the region.
We calibrated our images against the APASS catalog. Our 10-sigma limiting
magnitude is w = 20.04 for a 2.0 degrees radius error region centered at
the GBM Final Position. Comparing to the USNO-B1 and PAN-STARRS DR1
catalogs we do not detect any uncataloged source with significant fading or
rising to our 10-sigma limit.
We thank the staff of the Observatorio Astron��mico Nacional in San Pedro
M��rtir.
--
*Dr. Margarita Pereyra *
*FFTF, Schlumberger Foundation Alumnae*
----------------------------------------------------------------------------------------------------------------
*Catedr��tico Conacyt*
*Instituto de Astronom��a de la UNAM,*
*Km. 107 Carretera Tijua**na-Ensenada, *
*Ensenada Baja California, M��xico. C.P. 22860*
Oficina: 405
Skype: margarita-pereyra