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GCN Circular 36426

Subject
Fermi trigger No 737111207: Global MASTER-Net observations report
Date
2024-05-11T17:31:09Z (2 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-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB240511.38 (trigger No 737111207,02h 49m 38.40s , -66d 09m 36.0s, R=1) errorbox  27704 sec after notice time and 27738 sec after trigger time at 2024-05-11 16:49:00 UT, with upper limit up to  18.7 mag. Observations started at twilight.  The observations began at zenith distance = 65 deg. The sun  altitude  is -12.3 deg. 

The galactic latitude b = -47 deg., longitude l = 286 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2451776

We obtain a following upper limits.  

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

   27768 | 2024-05-11 16:49:00 |         MASTER-SAAO | (02h 49m 35.33s , -65d 12m 16.8s) |   C |    60 | 17.8 |        
   27768 | 2024-05-11 16:49:00 |         MASTER-SAAO | (02h 53m 58.47s , -65d 25m 16.5s) |   C |    60 | 17.8 |        
   27848 | 2024-05-11 16:50:20 |         MASTER-SAAO | (03h 08m 44.76s , -65d 11m 05.5s) |   C |    60 | 18.0 |        
   27848 | 2024-05-11 16:50:20 |         MASTER-SAAO | (03h 13m 08.20s , -65d 24m 04.8s) |   C |    60 | 18.0 |        
   28698 | 2024-05-11 17:04:30 |         MASTER-SAAO | (02h 49m 46.02s , -65d 11m 07.5s) |   C |    60 | 18.5 |        
   28698 | 2024-05-11 17:04:30 |         MASTER-SAAO | (02h 54m 08.88s , -65d 24m 09.6s) |   C |    60 | 18.7 |        
   28778 | 2024-05-11 17:05:50 |         MASTER-SAAO | (03h 08m 46.32s , -65d 11m 46.6s) |   C |    60 | 18.6 |        
   28778 | 2024-05-11 17:05:50 |         MASTER-SAAO | (03h 13m 09.75s , -65d 24m 48.1s) |   C |    60 | 18.6 |        
   28858 | 2024-05-11 17:07:10 |         MASTER-SAAO | (02h 24m 04.18s , -67d 06m 12.4s) |   C |    60 | 18.4 |        
   28858 | 2024-05-11 17:07:10 |         MASTER-SAAO | (02h 28m 47.50s , -67d 19m 16.7s) |   C |    60 | 18.4 |        
   28937 | 2024-05-11 17:08:29 |         MASTER-SAAO | (02h 44m 33.61s , -67d 06m 55.5s) |   C |    60 | 18.5 |        
   28937 | 2024-05-11 17:08:29 |         MASTER-SAAO | (02h 49m 17.51s , -67d 19m 58.7s) |   C |    60 | 18.5 |        
   29097 | 2024-05-11 17:11:09 |         MASTER-SAAO | (02h 32m 30.81s , -65d 12m 41.6s) |   C |    60 | 18.4 |        
   29097 | 2024-05-11 17:11:09 |         MASTER-SAAO | (02h 36m 54.57s , -65d 25m 45.9s) |   C |    60 | 18.5 |        
   29177 | 2024-05-11 17:12:29 |         MASTER-SAAO | (02h 42m 17.01s , -63d 31m 05.1s) |   C |    60 | 18.5 |        
   29256 | 2024-05-11 17:13:48 |         MASTER-SAAO | (02h 56m 01.80s , -63d 16m 47.5s) |   C |    60 | 18.4 |        
   29256 | 2024-05-11 17:13:48 |         MASTER-SAAO | (03h 00m 08.05s , -63d 29m 50.7s) |   C |    60 | 18.6 |        
   29337 | 2024-05-11 17:15:09 |         MASTER-SAAO | (03h 03m 06.55s , -67d 06m 35.8s) |   C |    60 | 18.5 |        
   29337 | 2024-05-11 17:15:09 |         MASTER-SAAO | (03h 07m 51.95s , -67d 19m 38.3s) |   C |    60 | 18.6 |        
   29576 | 2024-05-11 17:19:08 |         MASTER-SAAO | (02h 59m 02.88s , -68d 58m 36.7s) |   C |    60 | 18.5 |        
   29655 | 2024-05-11 17:20:27 |         MASTER-SAAO | (02h 49m 42.96s , -65d 11m 44.8s) |   C |    60 | 18.4 |        
   29655 | 2024-05-11 17:20:27 |         MASTER-SAAO | (02h 54m 07.18s , -65d 24m 48.5s) |   C |    60 | 18.5 |        
   29735 | 2024-05-11 17:21:47 |         MASTER-SAAO | (03h 08m 50.53s , -65d 10m 28.5s) |   C |    60 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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


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