TITLE:   GCN CIRCULAR
NUMBER:  28824
SUBJECT: Fermi GRB 201104A: Global MASTER-Net observations report 
DATE:    20/11/04 00:15:27 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@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),

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-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) started inspect of the Fermi GRB 201104A ( Fermi GBM team, GCN 28823) errorbox 80 sec after trigger time at 2020-11-04 00:02:17 UT, with upper limit up to  17.8 mag. Observations started at twilight.  The observations began at zenith distance = 59 deg. The sun  altitude  is -13.0 deg. 

The galactic latitude b = -38 deg., longitude l = 287 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1475503

We obtain a following upper limits.  

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

      90 | 2020-11-04 00:02:17 |         MASTER-OAFA | (03h 58m 14.15s , -74d 30m 15.1s) |   C |    20 | 17.4 |        
     130 | 2020-11-04 00:02:56 |         MASTER-OAFA | (03h 58m 07.55s , -74d 31m 15.8s) |   C |    20 | 17.3 |        
     174 | 2020-11-04 00:03:35 |         MASTER-OAFA | (03h 58m 15.37s , -74d 30m 56.0s) |   C |    30 | 17.4 |        
     228 | 2020-11-04 00:04:25 |         MASTER-OAFA | (03h 58m 11.98s , -74d 29m 19.8s) |   C |    40 | 17.6 |        
     293 | 2020-11-04 00:05:24 |         MASTER-OAFA | (03h 58m 12.40s , -74d 30m 55.2s) |   C |    50 | 17.8 |        
Filter C is a clear (unfiltred) band. 


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