TITLE:   GCN CIRCULAR
NUMBER:  34371
SUBJECT: Fermi  trigger No 713205976: Global MASTER-Net observations report
DATE:    23/08/08 17:15:48 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, 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-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 GRB230808.70 (trigger No 713205976,13h 38m 48.00s , -22d 12m 36.0s, R=2.42) errorbox  557 sec after notice time and 589 sec after trigger time at 2023-08-08 16:56:01 UT, with upper limit up to  18.6 mag. Observations started at twilight.  The observations began at zenith distance = 25 deg. The sun  altitude  is -10.9 deg. 

The galactic latitude b = 39 deg., longitude l = 318 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2251814

We obtain a following upper limits.  

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

     620 | 2023-08-08 16:56:01 |         MASTER-SAAO | (13h 38m 29.74s , -22d 07m 36.0s) |   C |    60 | 17.3 |        
     680 | 2023-08-08 16:56:01 |         MASTER-SAAO | (13h 38m 29.73s , -22d 07m 35.9s) |   C |   180 | 18.1 |  Coadd 
     620 | 2023-08-08 16:56:01 |         MASTER-SAAO | (13h 37m 33.96s , -22d 09m 24.9s) |   C |    60 | 17.8 |        
     680 | 2023-08-08 16:56:01 |         MASTER-SAAO | (13h 37m 33.96s , -22d 09m 24.9s) |   C |   180 | 18.6 |  Coadd 
     711 | 2023-08-08 16:57:32 |         MASTER-SAAO | (13h 38m 35.47s , -22d 07m 06.0s) |   C |    60 | 17.4 |        
     711 | 2023-08-08 16:57:32 |         MASTER-SAAO | (13h 37m 39.62s , -22d 08m 54.2s) |   C |    60 | 17.9 |        
     802 | 2023-08-08 16:59:03 |         MASTER-SAAO | (13h 38m 32.66s , -22d 05m 36.2s) |   C |    60 | 17.5 |        
     802 | 2023-08-08 16:59:03 |         MASTER-SAAO | (13h 37m 36.76s , -22d 07m 24.4s) |   C |    60 | 18.1 |        
     881 | 2023-08-08 17:00:22 |         MASTER-SAAO | (13h 38m 32.64s , -22d 07m 26.9s) |   C |    60 | 17.8 |        
     881 | 2023-08-08 17:00:22 |         MASTER-SAAO | (13h 37m 36.69s , -22d 09m 14.8s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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