TITLE: GCN CIRCULAR NUMBER: 15015 SUBJECT: GRB 130722A: Faulkes Telescope South optical candidate DATE: 13/07/22 10:07:51 GMT FROM: Andrea Melandri at Liverpool John Moores U A. Melandri (INAF/OAB), C. Guidorzi (U. Ferrara), J. Japelj (U. Ljubljana), D. Kopac (U. Ljubljana), C.G. Mundell (LJMU) and A. Gomboc (U. Ljubljana) report: The 2-m Faulkes Telescope South automatically began observing GRB 130722A (Troja et al. GCN Circ. 15013) on July 22 2013 at 08:21:29 UT (~130 s after the burst trigger). We find a fading object at coordinates RA(2000.0)= 17:22:36.47 Dec(2000.0)= -02:58:21.6 (error 1.3") with the following magnitudes Mid time from Total Exp Filter Magnitude trigger (min) (s) -------------------------------------------------------------- 12.37 1x30 R 18.0 +- 0.1 18.07 1x60 R 18.3 +- 0.1 -------------------------------------------------------------- Magnitudes are calibrated against nearby USNO-B1 stars, performing aperture photometry of the proposed optical counterpart above together with the nearby object located at RA(2000.0)=17:22:36.54, Dec(2000.0)=-02:58:22.1. The latter might be related to the OT, has a distance of 1.2" from the candidate and a catalogued magnitude of R2=19.7. It looks extended and might be the host galaxy of GRB 130722A.