TITLE:   GCN CIRCULAR
NUMBER:  31109
SUBJECT: Fermi  trigger No 659413798: Global MASTER-Net observations report 
DATE:    21/11/24 03:15:08 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, 
D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, 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
(Irkutsk State University, API),

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

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


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB211124.10 (trigger No 659413798,06h 19m 52.01s , -61d 25m 59.9s, R=5.9833) errorbox  12 sec after notice time and 32 sec after trigger time at 2021-11-24 02:30:26 UT, with upper limit up to  17.9 mag. Observations started at twilight.  The observations began at zenith distance = 38 deg. The sun  altitude  is -11.3 deg. 

The galactic latitude b = -27 deg., longitude l = 271 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1794963

We obtain a following upper limits.  

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

      38 | 2021-11-24 02:30:26 |         MASTER-SAAO | (05h 31m 48.12s , -61d 29m 54.4s) |   C |    10 | 16.9 |        
      58 | 2021-11-24 02:30:26 |         MASTER-SAAO | (05h 31m 48.12s , -61d 29m 54.5s) |   C |    50 | 17.1 |  Coadd 
      67 | 2021-11-24 02:30:55 |         MASTER-SAAO | (05h 32m 18.78s , -61d 30m 54.2s) |   C |    10 | 14.5 |        
     102 | 2021-11-24 02:31:25 |         MASTER-SAAO | (05h 31m 48.52s , -61d 31m 53.9s) |   C |    20 | 16.7 |        
     141 | 2021-11-24 02:32:04 |         MASTER-SAAO | (05h 31m 54.48s , -61d 31m 35.6s) |   C |    20 | 16.0 |        
     186 | 2021-11-24 02:32:44 |         MASTER-SAAO | (05h 31m 52.67s , -61d 30m 01.2s) |   C |    30 | 17.2 |        
     246 | 2021-11-24 02:32:44 |         MASTER-SAAO | (05h 31m 52.67s , -61d 30m 01.2s) |   C |   150 | 17.9 |  Coadd 
     305 | 2021-11-24 02:34:33 |         MASTER-SAAO | (05h 31m 55.88s , -61d 29m 55.4s) |   C |    50 | 17.4 |        
     385 | 2021-11-24 02:35:43 |         MASTER-SAAO | (05h 31m 51.14s , -61d 30m 48.8s) |   C |    70 | 17.4 |        
     491 | 2021-11-24 02:37:34 |         MASTER-SAAO | (05h 25m 59.62s , -61d 34m 49.5s) |   C |    60 | 17.2 |        
     823 | 2021-11-24 02:43:06 |         MASTER-SAAO | (05h 42m 39.61s , -61d 35m 28.9s) |   C |    60 | 14.3 |        
     903 | 2021-11-24 02:44:26 |         MASTER-SAAO | (05h 34m 34.19s , -59d 40m 37.4s) |   C |    60 | 13.7 |        
Filter C is a clear (unfiltred) band. 


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