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GCN Circular 35039

Subject
Fermi GRB 231115A: Global MASTER-Net observations report
Date
2023-11-15T17:30:44Z (4 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-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 GRB 231115A ( Fermi GBM team, GCN 35035) errorbox  4601 sec after notice time and 4635 sec after trigger time at 2023-11-15 16:53:37 UT, with upper limit up to  18.8 mag. The observations began at zenith distance = 47 deg. The sun  altitude  is -57.5 deg. 

The galactic latitude b = 34 deg., longitude l = 141 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2306520

We obtain a following upper limits.  

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

    4726 | 2023-11-15 16:53:37 |        MASTER-Tunka | (09h 52m 05.00s , +66d 57m 09.9s) |   C |   180 | 14.1 |        
    4726 | 2023-11-15 16:53:37 |        MASTER-Tunka | (09h 53m 24.26s , +67d 39m 25.7s) |   C |   180 | 18.8 |        
    4890 | 2023-11-15 16:57:06 |        MASTER-Tunka | (09h 52m 11.37s , +66d 56m 35.9s) |   C |    90 | 15.5 |        
    4890 | 2023-11-15 16:57:06 |        MASTER-Tunka | (09h 53m 31.95s , +67d 38m 26.3s) |   C |    90 | 18.1 |        
    5007 | 2023-11-15 16:59:02 |        MASTER-Tunka | (09h 52m 07.51s , +66d 55m 13.1s) |   C |    90 | 13.3 |        
    5007 | 2023-11-15 16:59:03 |        MASTER-Tunka | (09h 53m 26.66s , +67d 37m 26.5s) |   C |    90 | 18.0 |        
    5124 | 2023-11-15 17:01:00 |        MASTER-Tunka | (09h 52m 12.62s , +66d 55m 43.4s) |   C |    90 | 15.3 |        
    5124 | 2023-11-15 17:01:00 |        MASTER-Tunka | (09h 53m 33.01s , +67d 37m 31.8s) |   C |    90 | 18.0 |        
    5242 | 2023-11-15 17:02:58 |        MASTER-Tunka | (09h 52m 11.14s , +66d 57m 23.6s) |   C |    90 | 15.4 |        
    5242 | 2023-11-15 17:02:58 |        MASTER-Tunka | (09h 53m 31.53s , +67d 39m 11.8s) |   C |    90 | 17.9 |        
    5356 | 2023-11-15 17:04:52 |        MASTER-Tunka | (09h 53m 32.24s , +67d 37m 28.1s) |   C |    90 | 17.6 |        
    5475 | 2023-11-15 17:06:50 |        MASTER-Tunka | (09h 52m 15.59s , +66d 57m 34.6s) |   C |    90 | 15.3 |        
    5475 | 2023-11-15 17:06:51 |        MASTER-Tunka | (09h 53m 35.65s , +67d 39m 20.1s) |   C |    90 | 17.6 |        
    5593 | 2023-11-15 17:08:49 |        MASTER-Tunka | (09h 52m 10.80s , +66d 56m 43.7s) |   C |    90 | 15.1 |        
    5593 | 2023-11-15 17:08:49 |        MASTER-Tunka | (09h 53m 30.64s , +67d 38m 28.1s) |   C |    90 | 17.7 |        
    5710 | 2023-11-15 17:10:46 |        MASTER-Tunka | (09h 52m 11.18s , +66d 57m 44.6s) |   C |    90 | 15.0 |        
    5710 | 2023-11-15 17:10:46 |        MASTER-Tunka | (09h 53m 30.87s , +67d 39m 28.0s) |   C |    90 | 17.6 |        
Filter C is a clear (unfiltred) band. 


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


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