TITLE:   GCN CIRCULAR
NUMBER:  35191
SUBJECT: Fermi  trigger No 722653947: Global MASTER-Net observations report
DATE:    23/11/26 13:31:35 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-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB231126.05 (trigger No 722653947,18h 29m 40.80s , +25d 34m 48.0s, R=6.74) errorbox  37703 sec after notice time and 37741 sec after trigger time at 2023-11-26 11:41:24 UT, with upper limit up to  12.7 mag. The observations began at zenith distance = 57 deg. The sun  altitude  is -23.5 deg. 

The galactic latitude b = 15 deg., longitude l = 54 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2316021

We obtain a following upper limits.  

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

   37772 | 2023-11-26 11:41:24 |        MASTER-Tunka | (18h 03m 07.38s , +29d 52m 10.9s) |   C |    60 | 12.7 |  Coadd 
   37888 | 2023-11-26 11:43:21 |        MASTER-Tunka | (18h 16m 30.96s , +26d 04m 44.1s) |   C |    60 | 12.4 |  Coadd 
   37898 | 2023-11-26 11:43:30 |        MASTER-Tunka | (18h 33m 26.18s , +26d 36m 37.1s) |   C |    60 | 12.3 |        
   38169 | 2023-11-26 11:48:01 |        MASTER-Tunka | (18h 33m 03.05s , +24d 08m 22.3s) |   C |    60 | 12.3 |  Coadd 
   38284 | 2023-11-26 11:49:57 |        MASTER-Tunka | (18h 20m 41.96s , +29d 52m 08.5s) |   C |    60 | 12.1 |  Coadd 
Filter C is a clear (unfiltred) band. 


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