[vsnet-grb-info 21168] GRB 180924A: MASTER inspection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23267
SUBJECT: GRB 180924A: MASTER inspection
DATE:    18/09/25 09:29:21 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at 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. 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-OAFA robotic telescope (MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)
located in Argentina (OAFA observatory of San Juan National University)
was pointed to Swift  GRB 180924A (Ukwatta  et al. GCN 23261, Evans et al. GCN 23262, Stamatikos et al. GCN 23264, Melandri et al. GCN 23266)
57128 sec after notice time and 57128 sec after trigger time at 2018-09-25 07:14:30 UT.

There is no new astrophysical sources detected brighter then 19.3m (unfiltered)
inside Swift XRT error-box (03h 16m 47.87s -58d 31' 57.3", r=1.7arcsec Evans et al. GCN 23262)

The message may be cited.

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The galacitc latitude b =  -49.7 deg.
The observations made on zenit distance = 27 deg.
The moon (99.8 % bright part) was 40 deg. above the horizon. The distance 
between  moon and  object is 66
The sun  altitude  was -35.5 deg.