TITLE:   GCN CIRCULAR
NUMBER:  27158
SUBJECT: Fermi  trigger No 603949983: Global MASTER-Net observations report 
DATE:    20/02/21 04:00:31 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),

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-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 GRB200221.16 (trigger No 603949983,10h 28m 24.00s , +33d 09m 00.0s, R=4.81) errorbox  28 sec after notice time and 34 sec after trigger time at 2020-02-21 03:53:32 UT, with upper limit up to  13.9 mag. The observations began at zenith distance = 66 deg. The sun  altitude  is -46.1 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB200221.16 errorbox  40 sec after notice time and 46 sec after trigger time at 2020-02-21 03:53:44 UT, with upper limit up to  16.8 mag. The observations began at zenith distance = 31 deg. The sun  altitude  is -49.4 deg. 

The galactic latitude b = 59 deg., longitude l = 194 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1293900

We obtain a following upper limits.  

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

      39 | 2020-02-21 03:53:32 |         MASTER-OAFA | (10h 27m 30.29s , +33d 14m 49.8s) |   C |    10 | 13.9 |        
      51 | 2020-02-21 03:53:44 |          MASTER-IAC | (10h 27m 15.98s , +33d 15m 15.6s) |  P| |    10 | 16.7 |        
      51 | 2020-02-21 03:53:44 |          MASTER-IAC | (10h 26m 28.29s , +33d 18m 53.9s) |  P- |    10 | 16.5 |        
     128 | 2020-02-21 03:55:01 |          MASTER-IAC | (10h 27m 12.17s , +33d 15m 11.9s) |  P| |    10 | 16.8 |        
     128 | 2020-02-21 03:55:01 |          MASTER-IAC | (10h 26m 24.56s , +33d 18m 50.5s) |  P- |    10 | 16.7 |        
Filter C is a clear (unfiltred) band. 


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