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GCN Circular 18173

Subject

GRB 150819A: RATIR Optical Observations

Date

2015-08-19T14:08:37Z (9 years ago)

Edited On

2024-11-07T19:41:22Z (2 months ago)

From

Alan M. Watson at Instituto de Astronomia UNAM <alan@astro.unam.mx>

Edited By

Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>

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), 
José A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM), 
Carlos Román-Zúñiga (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 18163Loading...
 
 ) with the 
Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 
1.5m Harold Johnson Telescope at the Observatorio Astronómico Nacional on 
Sierra San Pedro Mártir 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 
18165Loading...
 
 ), 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 Astronómico Nacional in San Pedro 
Mártir.