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GCN Circular 33486

Subject
Fermi trigger No 700976129: Global MASTER-Net observations report
Date
2023-03-20T04:30:19Z (a year ago)
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 GRB230320.15 (trigger No 700976129,18h 11m 00.00s , -46d 29m 24.0s, R=9.79) errorbox  244 sec after notice time and 276 sec after trigger time at 2023-03-20 03:40:00 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 22 deg. The sun  altitude  is -13.8 deg. 

The galactic latitude b = -13 deg., longitude l = 347 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2205183

We obtain a following upper limits.  

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

     306 | 2023-03-20 03:40:00 |         MASTER-SAAO | (18h 13m 00.27s , -46d 25m 27.9s) |   C |    60 | 18.4 |        
     307 | 2023-03-20 03:40:00 |         MASTER-SAAO | (18h 14m 17.41s , -46d 25m 10.9s) |   C |    60 | 18.0 |        
     397 | 2023-03-20 03:41:31 |         MASTER-SAAO | (18h 24m 39.43s , -46d 24m 13.2s) |   C |    60 | 18.4 |        
     397 | 2023-03-20 03:41:31 |         MASTER-SAAO | (18h 25m 56.52s , -46d 23m 56.3s) |   C |    60 | 18.1 |        
     477 | 2023-03-20 03:42:51 |         MASTER-SAAO | (18h 07m 20.38s , -48d 17m 13.2s) |   C |    60 | 18.4 |        
     477 | 2023-03-20 03:42:51 |         MASTER-SAAO | (18h 08m 40.17s , -48d 16m 57.3s) |   C |    60 | 18.0 |        
     568 | 2023-03-20 03:44:21 |         MASTER-SAAO | (18h 19m 27.11s , -48d 18m 46.5s) |   C |    60 | 18.3 |        
     568 | 2023-03-20 03:44:21 |         MASTER-SAAO | (18h 20m 46.93s , -48d 18m 30.7s) |   C |    60 | 18.0 |        
     658 | 2023-03-20 03:45:52 |         MASTER-SAAO | (17h 51m 01.39s , -46d 24m 20.6s) |   C |    60 | 17.6 |        
     658 | 2023-03-20 03:45:52 |         MASTER-SAAO | (17h 52m 18.37s , -46d 24m 05.0s) |   C |    60 | 17.3 |        
     738 | 2023-03-20 03:47:11 |         MASTER-SAAO | (18h 02m 33.85s , -46d 23m 14.9s) |   C |    60 | 17.9 |        
     738 | 2023-03-20 03:47:11 |         MASTER-SAAO | (18h 03m 50.82s , -46d 22m 59.4s) |   C |    60 | 17.5 |        
     817 | 2023-03-20 03:48:31 |         MASTER-SAAO | (17h 59m 24.39s , -44d 28m 56.3s) |   C |    60 | 17.1 |        
     817 | 2023-03-20 03:48:31 |         MASTER-SAAO | (17h 58m 09.97s , -44d 29m 12.7s) |   C |    60 | 17.5 |        
     909 | 2023-03-20 03:50:03 |         MASTER-SAAO | (18h 10m 30.52s , -44d 29m 57.5s) |   C |    60 | 17.4 |        
     909 | 2023-03-20 03:50:03 |         MASTER-SAAO | (18h 09m 16.08s , -44d 30m 14.6s) |   C |    60 | 17.8 |        
Filter C is a clear (unfiltred) band. 


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