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GCN Circular 34971

Subject
Fermi trigger No 721204446: Global MASTER-Net observations report
Date
2023-11-09T17:16:48Z (a year ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
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 GRB231109.27 (trigger No 721204446,11h 32m 09.60s , +50d 39m 36.0s, R=6.78) errorbox  33843 sec after notice time and 33877 sec after trigger time at 2023-11-09 15:58:38 UT, with upper limit up to  18.4 mag. The observations began at zenith distance = 68 deg. The sun  altitude  is -54.3 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB231109.27 errorbox  35379 sec after notice time and 35412 sec after trigger time at 2023-11-09 16:24:14 UT, with upper limit up to  17.9 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -21.9 deg. 

The galactic latitude b = 63 deg., longitude l = 150 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2298669

We obtain a following upper limits.  

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

   33907 | 2023-11-09 15:58:38 |        MASTER-Tunka | (10h 38m 55.16s , +51d 51m 44.7s) |   C |    60 | 18.2 |        
   34066 | 2023-11-09 16:01:17 |        MASTER-Tunka | (10h 38m 55.81s , +51d 51m 48.2s) |   C |    60 | 18.4 |        
   35443 | 2023-11-09 16:24:14 |      MASTER-Tavrida | (11h 08m 52.02s , +55d 12m 05.7s) |   C |    60 | 17.6 |        
   35540 | 2023-11-09 16:25:51 |      MASTER-Tavrida | (10h 50m 51.36s , +53d 36m 40.8s) |   C |    60 | 16.3 |        
   35615 | 2023-11-09 16:27:06 |      MASTER-Tavrida | (11h 36m 09.37s , +51d 42m 26.6s) |   C |    60 | 15.9 |        
   35803 | 2023-11-09 16:30:13 |      MASTER-Tavrida | (11h 24m 08.13s , +55d 31m 37.8s) |   C |    60 | 16.8 |        
   35876 | 2023-11-09 16:31:27 |      MASTER-Tavrida | (11h 43m 06.90s , +53d 36m 29.6s) |   C |    60 | 16.5 |        
   36142 | 2023-11-09 16:35:53 |      MASTER-Tavrida | (11h 54m 36.65s , +49d 48m 33.5s) |   C |    60 | 16.4 |        
   36296 | 2023-11-09 16:38:27 |      MASTER-Tavrida | (11h 32m 48.13s , +57d 24m 58.9s) |   C |    60 | 17.1 |        
   36791 | 2023-11-09 16:46:42 |      MASTER-Tavrida | (11h 08m 50.56s , +55d 13m 25.7s) |   C |    60 | 17.9 |        
   36886 | 2023-11-09 16:48:17 |      MASTER-Tavrida | (11h 30m 48.16s , +53d 37m 36.5s) |   C |    60 | 16.8 |        
   36980 | 2023-11-09 16:49:51 |      MASTER-Tavrida | (10h 56m 33.35s , +55d 12m 14.3s) |   C |    60 | 17.7 |        
   37075 | 2023-11-09 16:51:26 |      MASTER-Tavrida | (11h 49m 22.79s , +51d 42m 31.3s) |   C |    60 | 15.0 |        
   37262 | 2023-11-09 16:54:33 |      MASTER-Tavrida | (11h 11m 07.09s , +55d 32m 03.0s) |   C |    60 | 15.7 |        
   37356 | 2023-11-09 16:56:07 |      MASTER-Tavrida | (11h 15m 33.97s , +57d 07m 41.2s) |   C |    60 | 17.7 |        
   37451 | 2023-11-09 16:57:42 |      MASTER-Tavrida | (11h 38m 37.33s , +55d 31m 50.7s) |   C |    60 | 16.6 |        
   37545 | 2023-11-09 16:59:15 |      MASTER-Tavrida | (11h 34m 57.05s , +55d 11m 31.0s) |   C |    60 | 16.3 |        
   37639 | 2023-11-09 17:00:50 |      MASTER-Tavrida | (11h 56m 57.45s , +53d 36m 47.0s) |   C |    60 | 16.1 |        
   37832 | 2023-11-09 17:04:03 |      MASTER-Tavrida | (11h 19m 11.43s , +57d 25m 42.8s) |   C |    60 | 14.5 |        
Filter C is a clear (unfiltred) band. 


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