[vsnet-grb-info 25375] Fermi GRB 200402A: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27475
SUBJECT: Fermi GRB 200402A: Global MASTER-Net observations report 
DATE:    20/04/02 11:30:07 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, 
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov,  D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),

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

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

R. Rebolo, M. Serra 
(The Instituto de Astrofisica de Canarias),

D. Buckley 
(South African Astronomical Observatory),

O.A. Gres, N.M. Budnev, O.Ershova 
(Irkutsk State University, API),

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

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




MASTER-Amur robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 200402A ( Fermi GBM team, GCN 27472) errorbox  5729 sec after notice time and 5754 sec after trigger time at 2020-04-02 11:15:32 UT, with upper limit up to  17.0 mag. Observations started at twilight.  The observations began at zenith distance = 55 deg. The sun  altitude  is -11.9 deg. 

The galactic latitude b = -12 deg., longitude l = 151 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1328194

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    5785 | 2020-04-02 11:15:32 |         MASTER-Amur | (02h 52m 11.07s , +43d 55m 08.3s) |   C |    60 | 15.8 |        
    5864 | 2020-04-02 11:16:52 |         MASTER-Amur | (02h 46m 41.32s , +41d 54m 04.5s) |   C |    60 | 15.8 |        
    5944 | 2020-04-02 11:18:11 |         MASTER-Amur | (02h 58m 14.77s , +45d 54m 24.0s) |   C |    60 | 16.1 |        
    6105 | 2020-04-02 11:20:53 |         MASTER-Amur | (02h 52m 05.11s , +43d 55m 55.5s) |   C |    60 | 16.7 |        
    6185 | 2020-04-02 11:22:12 |         MASTER-Amur | (03h 03m 17.29s , +43d 54m 57.2s) |   C |    60 | 17.0 |        
    6264 | 2020-04-02 11:23:32 |         MASTER-Amur | (02h 46m 34.49s , +41d 53m 50.0s) |   C |    60 | 16.6 |        
    6344 | 2020-04-02 11:24:51 |         MASTER-Amur | (02h 57m 26.77s , +41d 54m 01.6s) |   C |    60 | 16.9 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.