TITLE:   GCN CIRCULAR
NUMBER:  37351
SUBJECT: Fermi  trigger No 746684112: Global MASTER-Net observations report
DATE:    24/08/30 12:30:57 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

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-Amur robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB240830.18 (trigger No 746684112,20h 57m 16.80s , +65d 06m 36.0s, R=50) errorbox  25893 sec after notice time and 25925 sec after trigger time at 2024-08-30 11:27:13 UT, with upper limit up to  16.6 mag. Observations started at twilight.  The observations began at zenith distance = 41 deg. The sun  altitude  is -11.0 deg. 

The galactic latitude b = 13 deg., longitude l = 102 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2581388

We obtain a following upper limits.  

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

   25956 | 2024-08-30 11:27:13 |         MASTER-Amur | (13h 51m 38.47s , +56d 11m 37.4s) |   C |    60 | 15.7 |        
   25956 | 2024-08-30 11:27:13 |         MASTER-Amur | (13h 38m 12.84s , +55d 45m 03.2s) |   C |    60 | 15.5 |        
   26129 | 2024-08-30 11:30:06 |         MASTER-Amur | (00h 46m 55.28s , +77d 13m 08.0s) |   C |    60 | 16.6 |        
   26129 | 2024-08-30 11:30:06 |         MASTER-Amur | (01h 18m 59.38s , +77d 38m 40.8s) |   C |    60 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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