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GCN Circular 36803

Subject
Fermi GRB 240702A: Global MASTER-Net observations report
Date
2024-07-02T21:30:44Z (10 days 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 GRB 240702A ( Fermi GBM team, GCN 36802) errorbox  95 sec after notice time and 127 sec after trigger time at 2024-07-02 21:16:58 UT, with upper limit up to  19.6 mag. The observations began at zenith distance = 61 deg. The sun  altitude  is -22.7 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240702A errorbox  229 sec after notice time and 261 sec after trigger time at 2024-07-02 21:19:12 UT, with upper limit up to  18.6 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -69.4 deg. 

The galactic latitude b = -34 deg., longitude l = 77 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2517761

We obtain a following upper limits.  

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

     143 | 2024-07-02 21:16:58 |      MASTER-Tavrida | (22h 17m 36.31s , +10d 29m 35.2s) |   C |    30 | 17.3 |        
     143 | 2024-07-02 21:16:58 |      MASTER-Tavrida | (22h 17m 30.89s , +10d 34m 15.8s) |   C |    30 | 16.6 |        
     186 | 2024-07-02 21:17:41 |      MASTER-Tavrida | (22h 17m 42.39s , +10d 28m 32.8s) |   C |    30 | 17.3 |        
     186 | 2024-07-02 21:17:42 |      MASTER-Tavrida | (22h 17m 37.01s , +10d 33m 13.7s) |   C |    30 | 16.7 |        
     232 | 2024-07-02 21:18:22 |      MASTER-Tavrida | (22h 17m 35.53s , +10d 27m 30.5s) |   C |    40 | 17.4 |        
     232 | 2024-07-02 21:18:23 |      MASTER-Tavrida | (22h 17m 30.18s , +10d 32m 11.2s) |   C |    40 | 17.0 |        
     292 | 2024-07-02 21:19:12 |         MASTER-SAAO | (22h 14m 58.07s , +04d 53m 32.0s) |   C |    60 | 17.5 |        
     289 | 2024-07-02 21:19:14 |      MASTER-Tavrida | (22h 17m 40.91s , +10d 27m 30.2s) |   C |    50 | 17.4 |        
     289 | 2024-07-02 21:19:14 |      MASTER-Tavrida | (22h 17m 35.58s , +10d 32m 11.1s) |   C |    50 | 17.0 |        
     360 | 2024-07-02 21:20:15 |      MASTER-Tavrida | (22h 17m 38.36s , +10d 28m 57.5s) |   C |    70 | 17.7 |        
     360 | 2024-07-02 21:20:15 |      MASTER-Tavrida | (22h 17m 33.08s , +10d 33m 38.0s) |   C |    70 | 17.1 |        
     371 | 2024-07-02 21:20:31 |         MASTER-SAAO | (22h 25m 25.30s , +01d 05m 23.1s) |   C |    60 | 18.4 |        
     504 | 2024-07-02 21:21:44 |      MASTER-Tavrida | (22h 27m 15.40s , +34d 44m 40.1s) |   C |   180 | 19.6 |        
     504 | 2024-07-02 21:21:44 |      MASTER-Tavrida | (22h 27m 10.97s , +34d 49m 11.3s) |   C |   180 | 19.5 |        
     450 | 2024-07-02 21:21:51 |         MASTER-SAAO | (22h 22m 56.02s , +04d 52m 39.8s) |   C |    60 | 17.6 |        
     530 | 2024-07-02 21:23:10 |         MASTER-SAAO | (22h 33m 18.91s , +01d 05m 39.9s) |   C |    60 | 18.6 |        
Filter C is a clear (unfiltred) band. 


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


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