GCN Circular 6579
Subject
GRB 070616 : WIDGET simultaneous optical observations
Date
2007-06-26T08:03:05Z (17 years ago)
From
Makoto Tashiro at Saitama U/Swift <tashiro@phy.saitama-u.ac.jp>
N. Kodaka, K. Onda, Y. Urata, W. Iwakiri, T. Sugasahara, M. Tashiro
(Saitama-U), M. Kuwahara (TUS/RIKEN), T. Tamagawa (RIKEN) F. Usui
(ISAS/JAXA) report:
"We observed the error region of GRB 070616 (Swift/BAT trigger #282445;
Starling et al., GCN 6542; Sakamoto et al., GCN circ 6543; Starling et
al., GCN Report 66.2) with the very wide-field camera WIDGET located at
Kiso, Japan. The WIDGET monitored the region with repeat of unfiltered
5-second exposures between 27 seconds before and 136 seconds after the
burst.
We did not find any optical emission from the afterglow position
(Fatkhullin et al. GCN 6547). The 1-sigma limiting magnitude of
each frame derived by the Tycho-2 catalog was around V=11.8 magnitudes."
This message may be cited.