Skip to main content
New Swift-BAT/GUANO and IceCube Notice Types Available! See news and announcements

GCN Circular 13411

GRB 120703A: NOT optical observation
2012-07-04T07:56:33Z (12 years ago)
Dong Xu at Weizmann Inst <>
D. Xu (WIS), D. Malesani, J. P. U. Fynbo (DARK/NBI), N. R. Tanvir (U.
Leicester), K. Karhunen (U. Turku) report on behalf of a larger

We observed the field of GRB 120703A (Zhang et al., GCN 13408) using
the 2.5m Nordic Optical Telescope (NOT) equipped with StanCam.
Observations started at 04:02:42 UT on 2012-07-04 (i.e., 10.62 hr
after the BAT trigger) and 6x300s R-band frames were obtained.

An optical source was marginally detected in the stacked image at coordinates

RA (J2000)  = 22:37:25.61
Dec (J2000) = -29:43:23.7

with an uncertainty of ~0.5 arcsec radius, being consistent, but
slightly offset, with the UVOT position. The source had R~21.7
calibrated against nearby USNO star.
Looking for U.S. government information and services? Visit