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

GCN Circular 14426

GRB 130420B: Weihai optical upper limit
2013-04-20T22:06:40Z (11 years ago)
Dong Xu at DARK/NBI <>
Dong Xu (DARK/NBI), Chen Cao, Shaoming Hu, Dayong Ren (SDU) report:

We observed the field of GRB 130420B (Oates et al., GCN 14411) using
the 1m telescope located in Weihai, Shandong Province, China. We
obtained 12x300s I-band frames with a mean time of 2.973 hr after the
BAT trigger.

No optical source is detected within the enhanced XRT error circle
(Page et al., GCN 14421) in the stacked image, down to a limiting
magnitude of I>21.2 mag.
Looking for U.S. government information and services? Visit