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GCN Circular 17383

Subject

GRB 150203A: RATIR Optical and NIR Observations

Date

2015-02-03T06:42:32Z (10 years ago)

Edited On

2024-11-07T19:41:51Z (4 months ago)

From

Nat Butler at Az State U <natbutler@asu.edu>

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>

Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William
H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), 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), and
Harvey Moseley (GSFC) report:

We observed the field of GRB 150203A (Ukwatta, et al., GCN 17377Loading...
 
 ) 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 2015/02 3.19 to 2015/02 3.26 UTC (0.50 to 2.14
hours after the BAT trigger), obtaining a total of 1.28 hours exposure in
the r, i, and z bands.

We find no uncatalogued sources within the Swift-XRT error circle (Evans,
et al., GCN 17378Loading...
 
 ).  In comparison with USNO-B1 and 2MASS, we obtain the
following upper limits (3-sigma):

  r > 23.1
  i > 23.3
  z > 20.1

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.