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 13031

GRB 120308A : LOAO optical observation
2012-03-10T15:26:15Z (12 years ago)
Minsung Jang at Seoul National U <>
Jang, M., Im, M. (SNU), & Urata, Y. (NCU)

We observed GRB 120308A (Baumgartner et al., GCN 13017)
in R, I-bands with a 1 m telescope at Mt. Lemmon, Arizona, U.S.
The obsevation started at 10:51:23 2012-03-08 UT, ~ 4.6 hours
after the burst alert.

We alternatively took 6 frames for each filter with the exposure time, 300s.
We found a optical afterglow candidate in the stacked I image
with a preliminary magnitude, I ~ 18.7 +/- 0.12 mag
at mid-point time, 17274 sec after the burst alert
on the enhanced XRT position (Evans et al., GCN13023).
However, no afterglow candidate was found in the stacked R image.

We thank the LOAO operator, J. Yoon for this observation.
Looking for U.S. government information and services? Visit