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GCN Circular 15326

Subject
Fermi403206457: Weihai optical upper limit
Date
2013-10-13T05:42:47Z (11 years ago)
From
Dong Xu at DARK/NBI <dong.dark@gmail.com>
D. Xu (DARK/NBI), C.-M. Zhang, C. Cao, S.-M. Hu (SDU) report:

We observed the location of the candidate optical afterglow
(iPTF13dsw; Kasliwal et al., GCN 15324) of the Fermi-GBM trigger
403206457 with the 1m telescope located in Weihai, Shandong, China. We
obtained 5x600s R-band frames at a mean time of 2013-10-12 18:01:29 UT
(i.e., 24.23 hr after the Fermi-GBM trigger) under some clouds.

No optical source is detected at the iPTF location in the stacked
image down to a limiting magnitude of R > ~20.0 mag, calibrated with
the nearby SDSS field.
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