TITLE:   GCN CIRCULAR
NUMBER:  33514
SUBJECT: Fermi  trigger No 701313046: Global MASTER-Net observations report 
DATE:    23/03/24 18:30:23 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 GRB230324.05 (trigger No 701313046,09h 27m 40.80s , -48d 41m 24.0s, R=14.28) errorbox  58358 sec after notice time and 58390 sec after trigger time at 2023-03-24 17:23:51 UT, with upper limit up to  17.6 mag. Observations started at twilight.  The observations began at zenith distance = 29 deg. The sun  altitude  is -8.9 deg. 

The galactic latitude b =  2 deg., longitude l = 272 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2205657

We obtain a following upper limits.  

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

   58420 | 2023-03-24 17:23:51 |         MASTER-SAAO | (09h 07m 12.72s , -44d 25m 53.9s) |   C |    60 | 16.8 |        
   58420 | 2023-03-24 17:23:51 |         MASTER-SAAO | (09h 08m 23.97s , -44d 25m 18.3s) |   C |    60 | 16.4 |        
   58511 | 2023-03-24 17:25:21 |         MASTER-SAAO | (09h 18m 31.11s , -44d 25m 19.5s) |   C |    60 | 17.0 |        
   58511 | 2023-03-24 17:25:21 |         MASTER-SAAO | (09h 19m 42.36s , -44d 24m 39.8s) |   C |    60 | 16.7 |        
   58737 | 2023-03-24 17:29:08 |         MASTER-SAAO | (09h 04m 01.60s , -46d 19m 44.5s) |   C |    60 | 17.4 |        
   58737 | 2023-03-24 17:29:08 |         MASTER-SAAO | (09h 05m 15.17s , -46d 19m 20.3s) |   C |    60 | 17.3 |        
   58827 | 2023-03-24 17:30:38 |         MASTER-SAAO | (09h 15m 38.22s , -46d 17m 50.8s) |   C |    60 | 17.6 |        
   58827 | 2023-03-24 17:30:38 |         MASTER-SAAO | (09h 16m 51.67s , -46d 17m 24.7s) |   C |    60 | 17.4 |        
   58907 | 2023-03-24 17:31:58 |         MASTER-SAAO | (09h 10m 50.56s , -42d 29m 48.4s) |   C |    60 | 17.6 |        
   58907 | 2023-03-24 17:31:58 |         MASTER-SAAO | (09h 11m 59.51s , -42d 29m 06.9s) |   C |    60 | 17.5 |        
   58998 | 2023-03-24 17:33:28 |         MASTER-SAAO | (09h 21m 46.14s , -42d 30m 40.3s) |   C |    60 | 17.6 |        
   58998 | 2023-03-24 17:33:29 |         MASTER-SAAO | (09h 22m 55.08s , -42d 29m 56.1s) |   C |    60 | 17.5 |        
Filter C is a clear (unfiltred) band. 


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