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GCN Circular 34374

Subject
Fermi trigger No 713136868: Global MASTER-Net observations report
Date
2023-08-08T19:31:18Z (2 years 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 GRB230807.90 (trigger No 713136868,11h 30m 19.92s , +20d 55m 58.8s, R=34.98) errorbox  804 sec after notice time and 835 sec after trigger time at 2023-08-07 21:48:19 UT, with upper limit up to  17.8 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -29.6 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB230807.90 errorbox  4784 sec after notice time and 4815 sec after trigger time at 2023-08-07 22:54:39 UT, with upper limit up to  16.6 mag. Observations started at twilight.  The observations began at zenith distance = 69 deg. The sun  altitude  is -11.3 deg. 

The galactic latitude b = 71 deg., longitude l = 229 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2251406

We obtain a following upper limits.  

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

     926 | 2023-08-07 21:48:19 |      MASTER-Tavrida | (13h 04m 15.18s , +46d 38m 55.0s) |   C |   180 | 17.8 |        
    4905 | 2023-08-07 22:54:39 |         MASTER-OAFA | (14h 02m 46.57s , +35d 27m 44.2s) |   C |   180 | 16.3 |        
    5127 | 2023-08-07 22:58:20 |         MASTER-OAFA | (13h 53m 01.26s , +35d 27m 54.2s) |   C |   180 | 15.1 |        
    5349 | 2023-08-07 23:02:02 |         MASTER-OAFA | (12h 35m 45.79s , +03d 10m 07.7s) |   C |   180 | 16.6 |        
    7760 | 2023-08-07 23:42:13 |         MASTER-OAFA | (12h 12m 55.17s , -02d 26m 15.0s) |   C |   180 | 13.0 |        
    8605 | 2023-08-07 23:56:19 |         MASTER-OAFA | (12h 27m 24.53s , -00d 31m 40.8s) |   C |   180 | 13.0 |        
    8818 | 2023-08-07 23:59:51 |         MASTER-OAFA | (12h 06m 17.94s , -04d 20m 47.4s) |   C |   180 | 12.9 |        
    9030 | 2023-08-08 00:03:23 |         MASTER-OAFA | (12h 14m 25.83s , -04d 20m 33.3s) |   C |   180 | 13.2 |        
Filter C is a clear (unfiltred) band. 


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