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GCN Circular 23341

Subject

GRB 181013A: AbAO optical upper limit

Date

2018-10-15T18:04:31Z (6 years ago)

From

Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>

E. Mazaeva (IKI),  S. Belkin (IKI),  A. Pozanenko (IKI), R. Inasaridze 
(AbAO), V. Ayvazian  (AbAO),  O. Kvaratskhelia (AbAO), G. Kapanadze (AbAO), 
A. Volnova  (IKI),  I. Molotov (KIAM) report on behalf of larger GRB 
follow-up collaboration:

We observed the field of the Swift GRB 181013A (D'Avanzoet al., GCN 23332Not found
 
 
) 
with AS-32 (0.7m) telescope of Abastumani Observatory starting on  Oct. 13 
(UT) 15:23:15 .   We do not detect any object within  XRT position (Osborne 
et al., GCN 23334Not found
 
 
). Preliminary  photometry of the field is following:

Date              UT start     t-T0            Filter Exp.   OT    Err. UL
                                        (mid, days)         (s)

2018-10-13 15:23:15    0.54312    R      58*60  n/d   n/d  21.0

The photometry is based on nearby SDSS-DR12 stars
SDSS-DR12_id R(Lupton)
J135025.82+400818.8 16.99
J135102.99+401021.5 16.36
J135015.70+400244.5 13.69
J135009.92+400351.8 13.87
J135009.71+400308.0 14.87