GCN Circular 18173
Subject
GRB 150819A: RATIR Optical Observations
Date
2015-08-19T14:08:37Z (9 years ago)
From
Alan M. Watson at Instituto de Astronomia UNAM <alan@astro.unam.mx>
Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC), William
H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (UCB), J. Xavier
Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC),
Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC),
Jos� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes�s Gonz�lez (UNAM),
Carlos Rom�n-Z��iga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC),
John Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:
We observed the field of GRB 150819A (Ukwatta et al., GCN 18163) with the
Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the
1.5m Harold Johnson Telescope at the Observatorio Astron�mico Nacional on
Sierra San Pedro M�rtir from 2015/08 19.33 to 2015/08 19.48 UTC (7.08 to
10.60 hours after the BAT trigger), obtaining a total of 2.80 hours
exposure in the r and i bands.
For a source within the enhanced Swift-XRT error circle (Evans et al., GCN
18165), in comparison with the USNO-B1 and 2MASS catalogs, we obtain the
following upper limits (3-sigma):
r > 23.60
i > 23.91
These magnitudes are in the AB system and are not corrected for Galactic
extinction in the direction of the GRB.
We thank the staff of the Observatorio Astron�mico Nacional in San Pedro
M�rtir.