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GCN Circular 35260

Subject
Fermi trigger No 723412808: Global MASTER-Net observations report
Date
2023-12-04T22:31:40Z (6 months 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-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB231204.83 (trigger No 723412808,21h 37m 36.00s , +54d 39m 00.0s, R=2.37) errorbox  5494 sec after notice time and 5549 sec after trigger time at 2023-12-04 21:32:33 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 63 deg. The sun  altitude  is -68.3 deg. 

The galactic latitude b =  2 deg., longitude l = 98 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2323877

We obtain a following upper limits.  

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

    5580 | 2023-12-04 21:32:33 |      MASTER-Tavrida | (21h 42m 27.77s , +54d 06m 27.0s) |   C |    60 | 17.2 |        
    5653 | 2023-12-04 21:33:47 |      MASTER-Tavrida | (21h 24m 29.27s , +56d 00m 43.8s) |   C |    60 | 17.6 |        
    5726 | 2023-12-04 21:35:00 |      MASTER-Tavrida | (21h 35m 22.00s , +52d 12m 46.6s) |   C |    60 | 17.0 |        
    5800 | 2023-12-04 21:36:14 |      MASTER-Tavrida | (21h 16m 25.39s , +54d 04m 55.9s) |   C |    60 | 17.5 |        
    5874 | 2023-12-04 21:37:27 |      MASTER-Tavrida | (21h 51m 42.12s , +56d 00m 22.6s) |   C |    60 | 17.3 |        
    5947 | 2023-12-04 21:38:41 |      MASTER-Tavrida | (21h 34m 46.41s , +57d 54m 44.1s) |   C |    60 | 17.6 |        
    6107 | 2023-12-04 21:41:20 |      MASTER-Tavrida | (22h 00m 12.96s , +52d 10m 29.1s) |   C |    60 | 17.1 |        
    6886 | 2023-12-04 21:54:20 |      MASTER-Tavrida | (21h 42m 28.76s , +54d 05m 02.3s) |   C |    60 | 17.2 |        
    6959 | 2023-12-04 21:55:32 |      MASTER-Tavrida | (21h 56m 12.96s , +54d 06m 09.2s) |   C |    60 | 17.1 |        
    7032 | 2023-12-04 21:56:45 |      MASTER-Tavrida | (21h 24m 25.90s , +55d 59m 42.1s) |   C |    60 | 17.5 |        
    7104 | 2023-12-04 21:57:58 |      MASTER-Tavrida | (21h 38m 46.30s , +56d 00m 30.0s) |   C |    60 | 17.5 |        
    7177 | 2023-12-04 21:59:10 |      MASTER-Tavrida | (21h 35m 29.28s , +52d 11m 26.0s) |   C |    60 | 17.2 |        
    7250 | 2023-12-04 22:00:23 |      MASTER-Tavrida | (21h 48m 29.09s , +52d 10m 17.8s) |   C |    60 | 17.1 |        
    7335 | 2023-12-04 22:01:48 |      MASTER-Tavrida | (21h 16m 32.81s , +54d 04m 52.1s) |   C |    60 | 17.6 |        
    7407 | 2023-12-04 22:03:01 |      MASTER-Tavrida | (21h 30m 11.34s , +54d 05m 59.8s) |   C |    60 | 17.7 |        
    7481 | 2023-12-04 22:04:14 |      MASTER-Tavrida | (21h 51m 44.06s , +55d 58m 41.0s) |   C |    60 | 17.4 |        
    7554 | 2023-12-04 22:05:27 |      MASTER-Tavrida | (22h 06m 07.71s , +55d 59m 60.0s) |   C |    60 | 17.4 |        
    7628 | 2023-12-04 22:06:41 |      MASTER-Tavrida | (21h 34m 42.78s , +57d 53m 22.9s) |   C |    60 | 17.6 |        
    7700 | 2023-12-04 22:07:54 |      MASTER-Tavrida | (21h 49m 48.64s , +57d 54m 14.5s) |   C |    60 | 17.7 |        
    7848 | 2023-12-04 22:10:21 |      MASTER-Tavrida | (21h 23m 37.18s , +52d 10m 23.0s) |   C |    60 | 17.7 |        
    7921 | 2023-12-04 22:11:35 |      MASTER-Tavrida | (22h 00m 22.18s , +52d 10m 13.8s) |   C |    60 | 17.0 |        
    8431 | 2023-12-04 22:20:04 |      MASTER-Tavrida | (21h 21m 10.19s , +57d 52m 23.8s) |   C |    60 | 17.7 |        
Filter C is a clear (unfiltred) band. 


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