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GCN Circular 36782

Subject
Fermi trigger No 741251380: Global MASTER-Net observations report
Date
2024-06-28T20:30:34Z (15 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 GRB240628.30 (trigger No 741251380,06h 59m 12.00s , +49d 25m 01.2s, R=34.82) errorbox  44676 sec after notice time and 44697 sec after trigger time at 2024-06-28 19:34:32 UT, with upper limit up to  16.4 mag. Observations started at twilight.  The observations began at zenith distance = 82 deg. The sun  altitude  is -16.3 deg. 

The galactic latitude b = 22 deg., longitude l = 168 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2510977

We obtain a following upper limits.  

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

   44722 | 2024-06-28 19:34:32 |      MASTER-Tavrida | (05h 35m 04.87s , +53d 00m 21.9s) |   C |    50 | 15.9 |        
   44722 | 2024-06-28 19:34:32 |      MASTER-Tavrida | (05h 34m 50.06s , +53d 04m 47.1s) |   C |    50 | 16.4 |        
   44824 | 2024-06-28 19:36:04 |      MASTER-Tavrida | (05h 35m 27.54s , +52d 46m 34.5s) |   C |    70 | 16.4 |        
   44824 | 2024-06-28 19:36:04 |      MASTER-Tavrida | (05h 35m 39.20s , +52d 42m 53.9s) |   C |    70 | 16.0 |        
   44946 | 2024-06-28 19:37:56 |      MASTER-Tavrida | (05h 35m 01.43s , +53d 00m 58.8s) |   C |    90 | 15.9 |        
   44946 | 2024-06-28 19:37:56 |      MASTER-Tavrida | (05h 34m 44.65s , +53d 05m 28.1s) |   C |    90 | 16.3 |        
Filter C is a clear (unfiltred) band. 


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


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