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GCN Circular 38017

Subject
Fermi trigger No 752083996: Global MASTER-Net observations report
Date
2024-10-31T18:30:26Z (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-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 GRB241031.68 (trigger No 752083996,17h 36m 16.80s , -01d 51m 36.0s, R=10.07) errorbox  6170 sec after notice time and 6206 sec after trigger time at 2024-10-31 17:56:38 UT, with upper limit up to  17.1 mag. Observations started at twilight.  The observations began at zenith distance = 71 deg. The sun  altitude  is -11.4 deg. 

The galactic latitude b = 15 deg., longitude l = 23 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2654939

We obtain a following upper limits.  

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

    6237 | 2024-10-31 17:56:38 |         MASTER-SAAO | (17h 32m 32.69s , +01d 09m 33.5s) |   C |    60 | 14.4 |        
    6316 | 2024-10-31 17:57:57 |         MASTER-SAAO | (17h 27m 15.51s , -04d 31m 39.6s) |   C |    60 | 13.8 |        
    6396 | 2024-10-31 17:59:17 |         MASTER-SAAO | (17h 35m 19.75s , -04d 33m 11.5s) |   C |    60 | 15.3 |        
    6475 | 2024-10-31 18:00:36 |         MASTER-SAAO | (17h 42m 30.19s , -04d 34m 22.3s) |   C |    60 | 15.0 |        
    6556 | 2024-10-31 18:01:57 |         MASTER-SAAO | (17h 50m 26.74s , -04d 33m 36.1s) |   C |    60 | 15.4 |        
    6635 | 2024-10-31 18:03:16 |         MASTER-SAAO | (17h 39m 44.26s , +01d 09m 24.6s) |   C |    60 | 14.2 |        
    6714 | 2024-10-31 18:04:35 |         MASTER-SAAO | (17h 47m 34.54s , +01d 08m 10.6s) |   C |    60 | 14.4 |        
    6794 | 2024-10-31 18:05:55 |         MASTER-SAAO | (17h 30m 40.01s , -06d 26m 40.3s) |   C |    60 | 15.3 |        
    6873 | 2024-10-31 18:07:14 |         MASTER-SAAO | (17h 38m 32.30s , -06d 28m 10.4s) |   C |    60 | 16.4 |        
    7032 | 2024-10-31 18:09:53 |         MASTER-SAAO | (17h 34m 05.13s , +03d 02m 28.8s) |   C |    60 | 12.5 |        
    7111 | 2024-10-31 18:11:13 |         MASTER-SAAO | (17h 41m 10.08s , +03d 02m 53.0s) |   C |    60 | 13.2 |        
    7191 | 2024-10-31 18:12:32 |         MASTER-SAAO | (17h 49m 03.68s , +03d 03m 22.2s) |   C |    60 | 13.8 |        
    7270 | 2024-10-31 18:13:51 |         MASTER-SAAO | (17h 54m 32.80s , -00d 47m 01.2s) |   C |    60 | 15.8 |        
    7350 | 2024-10-31 18:15:11 |         MASTER-SAAO | (18h 02m 36.13s , -00d 47m 24.8s) |   C |    60 | 16.4 |        
    7429 | 2024-10-31 18:16:30 |         MASTER-SAAO | (17h 24m 40.53s , -00d 42m 55.0s) |   C |    60 | 16.4 |        
    7508 | 2024-10-31 18:17:50 |         MASTER-SAAO | (17h 32m 33.05s , -00d 45m 13.5s) |   C |    60 | 16.8 |        
    7588 | 2024-10-31 18:19:09 |         MASTER-SAAO | (17h 25m 37.59s , -02d 36m 55.7s) |   C |    60 | 16.1 |        
    7667 | 2024-10-31 18:20:28 |         MASTER-SAAO | (17h 33m 24.99s , -02d 38m 19.5s) |   C |    60 | 16.6 |        
    7747 | 2024-10-31 18:21:48 |         MASTER-SAAO | (17h 39m 39.44s , -00d 43m 41.3s) |   C |    60 | 16.6 |        
    7826 | 2024-10-31 18:23:07 |         MASTER-SAAO | (17h 47m 38.56s , -00d 45m 12.4s) |   C |    60 | 16.9 |        
    7905 | 2024-10-31 18:24:26 |         MASTER-SAAO | (17h 40m 34.97s , -02d 39m 41.4s) |   C |    60 | 17.1 |        
Filter C is a clear (unfiltred) band. 


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