TITLE:   GCN CIRCULAR
NUMBER:  38216
SUBJECT: GRB 241113A: KAIT optical observations
DATE:    24/11/14 09:14:38 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 241113A detected by Swift

(Siegel et al., GCN 38194) starting at 08:03:11 UT, 898s after

the bust under cloudy conditions. Observations were performed

in the clear (roughly R) filter, and a set of 20s, 40s and 60s

exposure images were obtained. The optical afterglow (Siegel

et al., GCN 38194; Francile et al., GCN 38195; Ferrer et al.,

GCN 38197; Izzo et al., GCN 38201; Ferro et al., GCN 38206;

Breeveld et al., GCN 38207) was barely detected in individual

image due to cloudy weather. However, the optical afterglow

was detected in the coadd images. We measure the following

magnitude calibrated to PS1 catalog:


tmid-t0(s) exp    mag      err

961        5x20s  17.9 +/- 0.2

1119       5x20s  18.1 +/- 0.2

1419       9x40s  18.5 +/- 0.3

2293       16x60s 19.0 +/- 0.3