TITLE:   GCN CIRCULAR
NUMBER:  34395
SUBJECT: GRB 230812B: KAIT Optical Afterglow Candidate
DATE:    23/08/13 05:26:37 GMT
FROM:    Weikang Zheng at UC Berkeley <weikang@berkeley.edu>

WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on

behalf of the KAIT GRB team:



The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at

Lick Observatory, responded to GRB 230812B (The Fermi GBM team,

GCN 34386) starting at Aug. 13, 04:42:53 UT. We detected an uncataloged

optical afterglow candidate not shown in SDSS archive at position

of (error ~0.5"):


RA:  16:36:31.52  (J2000)

Dec: +47:51:32.24 (J2000)


This position is about 7.4 arcsec to the improved Swift/XRT

localization (Page et al., GCN 34393), which is slightly outside its

estimate 3.7 arcseconds error radius.  We measure the target is

~18.7 in out clear band image at ~9.75 hours after burst. We can

not estimate the variability at this time, further observations

are encouraged.