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GCN Circular 15957

Subject
GRB 140311A: Recalibration of photometry of OT detected with Kottamia 188cm telescope
Date
2014-03-12T01:06:41Z (10 years ago)
From
Michitoshi Yoshida at HASC,Hiroshima U <yoshidam@hiroshima-u.ac.jp>
M. Yoshida, R. Itoh, Y. Moritani (HASC, Hiroshima Univ.),
G. B. Ali, A. Essam, A. Takey, and G. Hamed (NRIAG, Egypt)

We performed recalibration of the photometry of the OT of GRB 140311A
(Racusin et al. GCN 15944), and found that the R-band magnitude we
previously reported (Yoshida et al. GCN 15954) is about 1 magnitude
fainter than the newly calibrated value. The recalibration result is
as follows:

 MID-UT    T-EXP[sec]  R[mag]  err[mag]
----------------------------------------
 23:19:29  1800.0      20.9    +- 0.3
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