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GCN Circular 34580

Subject
Fermi trigger No 714809315: Global MASTER-Net observations report
Date
2023-08-27T20:30:43Z (8 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 GRB230827.26 (trigger No 714809315,19h 57m 16.80s , +56d 28m 12.0s, R=2.17) errorbox  43424 sec after notice time and 43457 sec after trigger time at 2023-08-27 18:12:48 UT, with upper limit up to  18.8 mag. The observations began at zenith distance = 16 deg. The sun  altitude  is -17.8 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB230827.26 errorbox  51151 sec after notice time and 51184 sec after trigger time at 2023-08-27 20:21:35 UT, with upper limit up to  17.4 mag. The observations began at zenith distance = 22 deg. The sun  altitude  is -35.7 deg. 

The galactic latitude b = 14 deg., longitude l = 90 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2261201

We obtain a following upper limits.  

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

   43548 | 2023-08-27 18:12:48 |      MASTER-Tavrida | (19h 46m 06.01s , +57d 21m 28.8s) |   C |   180 | 18.8 |        
   51214 | 2023-08-27 20:21:35 |   MASTER-Kislovodsk | (19h 48m 46.64s , +57d 14m 17.4s) |   C |    60 | 17.4 |        
   51214 | 2023-08-27 20:21:35 |   MASTER-Kislovodsk | (19h 48m 21.11s , +57d 37m 43.3s) |   C |    60 | 14.8 |        
   51295 | 2023-08-27 20:22:55 |   MASTER-Kislovodsk | (19h 48m 46.58s , +57d 12m 34.0s) |   C |    60 | 17.0 |        
   51295 | 2023-08-27 20:22:55 |   MASTER-Kislovodsk | (19h 48m 19.15s , +57d 35m 59.8s) |   C |    60 | 16.3 |        
Filter C is a clear (unfiltred) band. 


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


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