[vsnet-grb-info 14643] GRB 140311A: Recalibration of photometry of OT detected with Kottamia 188cm telescope

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15957
SUBJECT: GRB 140311A: Recalibration of photometry of OT detected with Kottamia 188cm telescope
DATE:    14/03/12 01:06:41 GMT
FROM:    Michitoshi Yoshida at HASC,Hiroshima U  <yoshidam at 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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