[vsnet-grb-info 13431] GRB 130603B: RATIR Optical and NIR Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14764
SUBJECT: GRB 130603B: RATIR Optical and NIR Observations
DATE:    13/06/04 17:49:36 GMT
FROM:    Eleonora Troja at GSFC  <eleonora.troja at nasa.gov>

Eleonora Troja (GSFC), 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 (UCSC), 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 130603B (Melandri, et al., GCN 14735) with the
Reionization and Transients Infrared Camera (RATIR;www.ratir.org 
<http://www.ratir.org>) on the
1.5m Harold Johnson Telescope at the Observatorio Astronómico Nacional on
Sierra San Pedro Mártir from 2013/06 4.16 to 2013/06 4.27 UTC (12.01
to 14.78 hours after the BAT trigger), obtaining a total of 1.93 hours
exposure in the r' and i' bands and 0.81 hours exposure in the Z,
Y, J, and H bands.

At the location of the optical afterglow (Levan et al., GCN 14742),
in comparison with SDSS DR8 and 2MASS, we obtain the following detections:

    r'    20.78 +/- 0.03
    i'    20.52 +/- 0.03
    Z    20.20 +/- 0.05
    Y    19.94 +/- 0.05
    J     19.97 +/- 0.06
    H    19.55 +/- 0.06

These magnitudes are in the AB system and not corrected for Galactic
extinction in the direction of the GRB.
Photometry was performed adopting a large aperture which includes both the
afterglow and its host galaxy.

We thank the staff of the Observatorio Astronómico Nacional in San Pedro
Mártir.