[vsnet-grb-info 21823] IceCube-190221A: MASTER Global Robotic Net optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23922
SUBJECT: IceCube-190221A: MASTER Global Robotic Net optical observation
DATE:    19/02/21 20:50:22 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, D.Vlasenko, V.Vladimirov, D.Zimnukhov,
A.Kuznetsov, P.Balanutsa, V.Senik, A. Chasovnikov, V.Topolev, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department),

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

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

O. Gress, N.M. Budnev, O.Ershova, Yu.Ishmuhametova (Applied Physics Institute,Irkutsk State University),

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

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

D. Buckley (South African Astronomical Observatory),

A. Tlatov,  D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),


MASTER-OAFA robotic telescope (Global 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 the  IC190221A  (The IceCube Collaboration  GCN 23918)
17 sec after notice time (47 sec after trigger time) at 2019-02-21 08:26:26 UT.

The 5-sigma upper limit ~19 mag (180s exposition), we have 9 expositions.
Also we have 4 images of the part of IC error-box in time ntervall 
2019-02-21 08:01:49-08:14:20UT (11 minutes befor neutrino alert)
during Fermi trigger inspection .

The full analysys of ICECUBE error-box (RA: 268.81 [-1.8,+1.2], Dec: -17.04 [-0.5,+1.3] ) will be continued.

The error box center galactic latitude b = 3.5 deg., longitude l = 11.7deg.
The observations started when error-box altitude was 33deg.
The sun  altitude  is -23.0 deg.
The moon (96 % bright part) was 43 deg. above the horizon. The distance between  moon and  object was 91

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