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GCN Circular 35973

Subject
Fermi GRB 240320A: Global MASTER-Net observations report
Date
2024-03-21T17:46:02Z (a month 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 240320A ( Fermi GBM team, GCN 35967Not found
 
 
) errorbox  69145 sec after notice time and 69181 sec after trigger time at 2024-03-21 12:42:48 UT, with upper limit up to  18.2 mag. Observations started at twilight.  The observations began at zenith distance = 15 deg. The sun  altitude  is -13.5 deg. 

MASTER-Amur robotic telescope  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 240320A errorbox  80725 sec after notice time and 80760 sec after trigger time at 2024-03-21 15:55:48 UT, with upper limit up to  17.3 mag. The observations began at zenith distance = 30 deg. The sun  altitude  is -39.4 deg. 

The galactic latitude b = 45 deg., longitude l = 148 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2403375

We obtain a following upper limits.  

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

   69211 | 2024-03-21 12:42:48 |        MASTER-Tunka | (09h 10m 24.61s , +52d 39m 34.5s) |   C |    60 | 14.4 |        
   69335 | 2024-03-21 12:44:52 |        MASTER-Tunka | (09h 11m 55.93s , +50d 44m 36.9s) |   C |    60 | 14.3 |  Coadd 
   69600 | 2024-03-21 12:49:17 |        MASTER-Tunka | (08h 45m 24.19s , +52d 40m 17.4s) |   C |    60 | 15.9 |  Coadd 
   69698 | 2024-03-21 12:50:55 |        MASTER-Tunka | (09h 09m 31.06s , +54d 32m 15.0s) |   C |    60 | 16.5 |  Coadd 
   69797 | 2024-03-21 12:52:34 |        MASTER-Tunka | (08h 45m 26.41s , +52d 40m 09.6s) |   C |    60 | 16.9 |  Coadd 
   70044 | 2024-03-21 12:56:41 |        MASTER-Tunka | (09h 35m 38.76s , +54d 33m 26.0s) |   C |    60 | 16.1 |  Coadd 
   70162 | 2024-03-21 12:58:40 |        MASTER-Tunka | (08h 43m 21.21s , +54d 33m 41.9s) |   C |    60 | 15.6 |  Coadd 
   70282 | 2024-03-21 13:00:39 |        MASTER-Tunka | (09h 35m 39.14s , +54d 31m 37.8s) |   C |    60 | 14.8 |  Coadd 
   71463 | 2024-03-21 13:20:20 |        MASTER-Tunka | (09h 13m 48.63s , +48d 52m 15.6s) |   C |    60 | 13.9 |  Coadd 
   71922 | 2024-03-21 13:28:19 |        MASTER-Tunka | (08h 35m 26.53s , +60d 30m 49.8s) |   C |    20 | 18.2 |        
   72059 | 2024-03-21 13:30:16 |        MASTER-Tunka | (08h 49m 27.90s , +60d 06m 51.9s) |   C |    60 | 12.8 |  Coadd 
   72144 | 2024-03-21 13:31:41 |        MASTER-Tunka | (09h 12m 34.32s , +60d 05m 50.6s) |   C |    60 | 17.6 |  Coadd 
   72230 | 2024-03-21 13:33:07 |        MASTER-Tunka | (08h 44m 16.89s , +59d 00m 23.4s) |   C |    60 | 14.7 |  Coadd 
   72313 | 2024-03-21 13:34:30 |        MASTER-Tunka | (08h 49m 20.66s , +58d 52m 02.7s) |   C |    60 | 12.9 |  Coadd 
   80766 | 2024-03-21 15:55:48 |         MASTER-Amur | (09h 02m 06.67s , +67d 36m 52.7s) |   C |    10 | 15.8 |        
   80766 | 2024-03-21 15:55:48 |         MASTER-Amur | (09h 01m 59.37s , +67d 58m 27.7s) |   C |    10 | 16.1 |        
   80805 | 2024-03-21 15:56:27 |         MASTER-Amur | (09h 02m 06.57s , +67d 35m 07.2s) |   C |    10 | 15.8 |        
   80805 | 2024-03-21 15:56:27 |         MASTER-Amur | (09h 01m 59.52s , +67d 56m 43.7s) |   C |    10 | 16.0 |        
   80834 | 2024-03-21 15:56:56 |         MASTER-Amur | (08h 41m 37.71s , +67d 35m 50.6s) |   C |    10 | 15.8 |        
   80834 | 2024-03-21 15:56:56 |         MASTER-Amur | (08h 41m 31.44s , +67d 57m 26.9s) |   C |    10 | 16.0 |        
   80864 | 2024-03-21 15:57:26 |         MASTER-Amur | (08h 41m 32.86s , +67d 34m 59.8s) |   C |    10 | 15.7 |        
   80864 | 2024-03-21 15:57:26 |         MASTER-Amur | (08h 41m 26.59s , +67d 56m 42.7s) |   C |    10 | 15.9 |        
   80893 | 2024-03-21 15:57:55 |         MASTER-Amur | (08h 41m 33.39s , +67d 35m 44.6s) |   C |    10 | 15.8 |        
   80893 | 2024-03-21 15:57:55 |         MASTER-Amur | (08h 41m 27.16s , +67d 57m 27.9s) |   C |    10 | 15.9 |        
   80923 | 2024-03-21 15:58:25 |         MASTER-Amur | (08h 41m 39.41s , +67d 34m 30.6s) |   C |    10 | 15.8 |        
   80923 | 2024-03-21 15:58:25 |         MASTER-Amur | (08h 41m 33.20s , +67d 56m 14.3s) |   C |    10 | 16.1 |        
   80963 | 2024-03-21 15:58:55 |         MASTER-Amur | (08h 41m 33.61s , +67d 33m 14.3s) |   C |    30 | 16.3 |        
   80963 | 2024-03-21 15:58:55 |         MASTER-Amur | (08h 41m 27.54s , +67d 54m 59.0s) |   C |    30 | 16.6 |        
   81013 | 2024-03-21 15:59:45 |         MASTER-Amur | (08h 41m 40.23s , +67d 35m 41.2s) |   C |    30 | 15.4 |        
   81013 | 2024-03-21 15:59:45 |         MASTER-Amur | (08h 41m 34.15s , +67d 57m 26.4s) |   C |    30 | 15.7 |        
   81062 | 2024-03-21 16:00:34 |         MASTER-Amur | (08h 41m 37.02s , +67d 36m 44.4s) |   C |    30 | 15.8 |        
   81062 | 2024-03-21 16:00:34 |         MASTER-Amur | (08h 41m 30.97s , +67d 58m 30.1s) |   C |    30 | 16.3 |        
   81127 | 2024-03-21 16:01:24 |         MASTER-Amur | (08h 41m 37.50s , +67d 34m 57.2s) |   C |    60 | 15.5 |        
   81127 | 2024-03-21 16:01:24 |         MASTER-Amur | (08h 41m 31.42s , +67d 56m 43.6s) |   C |    60 | 16.0 |        
   81207 | 2024-03-21 16:02:44 |         MASTER-Amur | (08h 41m 42.72s , +67d 35m 45.5s) |   C |    60 | 15.5 |        
   81207 | 2024-03-21 16:02:44 |         MASTER-Amur | (08h 41m 36.68s , +67d 57m 33.0s) |   C |    60 | 16.0 |        
   81287 | 2024-03-21 16:04:05 |         MASTER-Amur | (08h 41m 37.54s , +67d 34m 19.1s) |   C |    60 | 15.5 |        
   81287 | 2024-03-21 16:04:05 |         MASTER-Amur | (08h 41m 32.01s , +67d 56m 06.4s) |   C |    60 | 15.8 |        
   82177 | 2024-03-21 16:18:54 |         MASTER-Amur | (08h 41m 37.32s , +67d 59m 35.7s) |   C |    60 | 17.3 |        
   82177 | 2024-03-21 16:18:54 |         MASTER-Amur | (08h 41m 47.95s , +67d 37m 53.7s) |   C |    60 | 16.6 |        
   82257 | 2024-03-21 16:20:14 |         MASTER-Amur | (08h 41m 43.13s , +67d 58m 37.2s) |   C |    60 | 17.2 |        
   82257 | 2024-03-21 16:20:14 |         MASTER-Amur | (08h 41m 53.19s , +67d 36m 50.6s) |   C |    60 | 16.6 |        
Filter C is a clear (unfiltred) band. 


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