Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 22892

Subject
GRB 180703A: LCO Sutherland possible optical candidate
Date
2018-07-04T13:26:02Z (6 years ago)
From
Renato Martone at Universita' di Ferrara <mrtrnt@unife.it>
C. Guidorzi, R. Martone (U. Ferrara), S. Kobayashi (LJMU), C.G. Mundell (U. Bath), A. Gomboc (U. Nova Gorica), I.A. Steele (LJMU), A. Cucchiara, D. Morris (U. of Virgin Islands) on behalf of a large collaboration report:

One of the LCO 1-m units at Sutherland Observatory (South Africa) began observing Fermi-LAT GRB 180703A (Racusin et al. GCN 22883) on July 04, 02:34 UT (5.5 hours after the GRB trigger time) with the SDSS i' filter. On the border of the Swift-XRT error circle of source S1 (Gibson et al. GCN 22891) we marginally detect an object at the following position:

RA(J2000)=  00:25:52.35
DEC(J2000)= -67:10:43.4

with an error radius of ~1" and a magnitude of i'=20.6 +- 0.3 at a mid time of 5.65 hours post GRB, as calibrated against nearby USNOB-UCAC4 stars.
Looking for U.S. government information and services? Visit USA.gov