Back
GCN Circular 23850

Subject
GRB 190203A: MASTER OT detection
Date
2019-02-03T23:55:04Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, D.Vlasenko, V.Vladimirov, 
D.Zimnukhov, A.Kuznetsov, P.Balanutsa, A. Chasovnikov, D.Kuvshinov (Lomonosov 
Moscow State University, SAI, Physics Department),

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

D. Buckley (South African Astronomical Observatory),

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

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

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

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)

MASTER-Amur robotic telescope (Global MASTER-Net http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, v.2010, 30L)
was pointed to Swift GRB190203B  (Lien et al. GCN23845Not found
 
 
, Ttrig=2019-02-03 15:44:08 UT)
19 sec after notice time (63 sec after trigger time) at 2019-02-03 15:45:11 UT.

On our first (10s exposure)  set we  found 1 optical transient within SWIFT error-box:

T-Tmid      Date      Time       Exp,s       Ra                Dec           Mag
---------|---------------------|-------|-----------------|-----------------|-------
       68   2019-02-03 15:45:11      10  (01h 30m 23.25s , +55d 43m 20.59s)    15.28

There is fast decay on the light curve.

The 5-sigma upper limit on the first 10s exposition was 16.3mag


The galactic latitude b = -6 deg., longitude l = 129 deg.
The observations started on zenit distance = 61 deg.
The sun  altitude  was -56.2 deg

The message may be cited.