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GCN Circular 34277

Subject
Fermi trigger No 712143685: Global MASTER-Net observations report
Date
2023-07-27T23:16:06Z (10 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, D. Vlasenko, 
G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin
(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. Gres, N.M. Budnev
(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),

A. Gabovich, V.Yurkov 
(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 GRB230727.40 (trigger No 712143685,08h 45m 55.92s , +67d 25m 58.8s, R=35.95) errorbox  46132 sec after notice time and 46164 sec after trigger time at 2023-07-27 22:30:45 UT, with upper limit up to  17.9 mag. The observations began at zenith distance = 83 deg. The sun  altitude  is -26.1 deg. 

The galactic latitude b = 36 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=2245798

We obtain a following upper limits.  

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

   46255 | 2023-07-27 22:30:45 |      MASTER-Tavrida | (12h 21m 30.58s , +42d 33m 27.5s) |   C |   180 | 15.0 |        
   46444 | 2023-07-27 22:33:54 |      MASTER-Tavrida | (12h 21m 35.57s , +42d 34m 12.3s) |   C |   180 | 15.5 |        
   46632 | 2023-07-27 22:37:02 |      MASTER-Tavrida | (12h 21m 29.13s , +42d 34m 57.1s) |   C |   180 | 15.3 |        
   46836 | 2023-07-27 22:40:26 |      MASTER-Tavrida | (07h 12m 38.43s , +71d 49m 39.5s) |   C |   180 | 14.2 |        
   47032 | 2023-07-27 22:43:42 |      MASTER-Tavrida | (08h 44m 07.94s , +76d 40m 35.0s) |   C |   180 | 17.6 |        
   47225 | 2023-07-27 22:46:55 |      MASTER-Tavrida | (08h 50m 09.42s , +74d 46m 02.6s) |   C |   180 | 17.6 |        
   48071 | 2023-07-27 23:01:01 |      MASTER-Tavrida | (08h 52m 20.39s , +76d 39m 48.2s) |   C |   180 | 17.9 |        
Filter C is a clear (unfiltred) band. 


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


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