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GCN Circular 23176

Subject
GRB 180824A: MASTER inspection IPN short GRB error box
Date
2018-08-26T07:28:28Z (6 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, D. Vlasenko, N.Tiurina,
V.Kornilov, A.Kuznetsov, V.Chazov, I.  Gorbunov,
D.Zimnukhov, D.Kuvshinov, P.Balanutsa, V.Vladimirov,
Lomonosov Moscow State University,SAI

A. Tlatov, V.Senik, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory

D.Svinkin (Ioffe Institute, Sankt Petersburg)

D. Buckley,
South African Astronomical Observatory (SAAO)

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias (IAC)

R. Podesta, F. Podesta, C. Lopez, C.Francile
Observatorio Astronomico Felix Aguilar (OAFA)

H.Levato,
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

O. Gres, N.M.Budnev , Yu.Ishmuhametova
Irkutsk State University (ISU)

A. Gabovich, V. Yurkov, Yu. Sergienko
Blagoveschensk Educational State University (BSPU)


MASTER-Kislovodsk  robotic telescope (MASTER-Net: 
http://observ.pereplet.ru) 
located in Kislovodsk Solar Station of the Pulkovo Observatory  was 
starting survey on the IPN 
GRB180824A error-box (Svinkin et al., GCN #23174)  274 sec after 
notice time and 35665 sec after trigger time at 2018-08-24 19:59:44 UT.
The 5-sigma upper limit on our first (180s exposure)  set is about 18.9 
mag .

The galacitc latitude b =  0 deg.

The observations made on zenit distance = 36 deg.The moon (97 % bright 
part) is 29 deg. above the horizon. The distance between  moon and  object 
is 87
The sun  altitude  is -32.9 deg.
The object can be observed till sunrise at 2018-08-25 02:23:27

There are several bright galaxy (d < 100 Mpc) in IPN error box:

    Galaxy name         |        center         | b_mag  |  dist
-----------------------+-----------------------+--------+---------
  PGC089890             | (15.7675d , 54.0347d) | 14.178 | 88.7359
  2MASS00061177+5916507 | (1.54907d , 59.2808d) | 14.559 | 81.8258
  2MASS00095357+5859451 | (2.47322d , 58.9959d) | 14.733 | 32.3946
  2MASS00035040+5929552 | (0.96001d , 59.4987d) | 15.373 | 14.6266

The MASTER-Kislovodsk cover map is available at
http://www.pereplet.ru/lipunov/images/master_MAP_GRB180824A.jpg

There is no OT detetcted.

The message may be cited.