TITLE:   GCN CIRCULAR
NUMBER:  35585
SUBJECT: Fermi GRB 240119A: Global MASTER-Net observations report
DATE:    24/01/20 00:46:03 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, V.Senik,  D. Vlasenko,
G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij
(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. Gress, N.M. Budnev, O.Ershova
(Irkutsk State University, API),

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez
(INAOE, Guillermo Haro Astrophysics Observatory),

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

V. Yurkov, A. Gabovich
(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 GRB 240119A ( "The Fermi GBM team, GCN 35583) errorbox  24476 sec after notice time and 24484 sec after trigger time at 2024-01-20 00:17:12 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 52 deg. The sun  altitude  is -33.6 deg. 

The galactic latitude b = -22 deg., longitude l = 299 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2360174

We obtain a following upper limits.  

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

   24514 | 2024-01-20 00:17:12 |         MASTER-SAAO | (10h 07m 17.25s , -84d 10m 49.7s) |   C |    60 | 19.6 |        
   24514 | 2024-01-20 00:17:12 |         MASTER-SAAO | (10h 25m 18.35s , -84d 23m 42.8s) |   C |    60 | 19.5 |        
   24594 | 2024-01-20 00:18:31 |         MASTER-SAAO | (09h 30m 35.62s , -82d 17m 59.7s) |   C |    60 | 19.7 |        
   24594 | 2024-01-20 00:18:31 |         MASTER-SAAO | (09h 44m 15.29s , -82d 30m 47.6s) |   C |    60 | 19.5 |        
   24674 | 2024-01-20 00:19:51 |         MASTER-SAAO | (11h 24m 48.94s , -82d 18m 00.4s) |   C |    60 | 19.8 |        
   24674 | 2024-01-20 00:19:51 |         MASTER-SAAO | (11h 38m 19.63s , -82d 31m 09.3s) |   C |    60 | 19.6 |        
   24753 | 2024-01-20 00:21:10 |         MASTER-SAAO | (11h 21m 22.33s , -86d 04m 09.3s) |   C |    60 | 19.6 |        
   24753 | 2024-01-20 00:21:10 |         MASTER-SAAO | (11h 48m 01.32s , -86d 17m 30.3s) |   C |    60 | 19.6 |        
Filter C is a clear (unfiltred) band. 


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