GCN Circular 33724
Subject
Fermi trigger No 704837952: Global MASTER-Net observations report
Date
2023-05-04T17:30:39Z (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 GRB230503.85 (trigger No 704837952,04h 23m 57.60s , -48d 44m 24.0s, R=2.88) errorbox 73600 sec after notice time and 73631 sec after trigger time at 2023-05-04 16:46:19 UT, with upper limit up to 17.5 mag. Observations started at twilight. The observations began at zenith distance = 54 deg. The sun altitude is -10.6 deg.
The galactic latitude b = -44 deg., longitude l = 256 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2214503
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
73662 | 2023-05-04 16:46:19 | MASTER-SAAO | (04h 14m 58.23s , -50d 05m 51.4s) | C | 60 | 16.7 |
73752 | 2023-05-04 16:47:49 | MASTER-SAAO | (04h 27m 20.37s , -50d 06m 43.4s) | C | 60 | 17.3 |
73832 | 2023-05-04 16:49:09 | MASTER-SAAO | (04h 28m 04.69s , -48d 11m 00.6s) | C | 60 | 17.4 |
73923 | 2023-05-04 16:50:40 | MASTER-SAAO | (04h 40m 05.99s , -48d 12m 15.7s) | C | 60 | 17.5 |
74002 | 2023-05-04 16:51:59 | MASTER-SAAO | (04h 05m 09.10s , -48d 11m 42.3s) | C | 60 | 17.3 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.