GCN Circular 34260
Subject
IceCube Alert 230725.90: Global MASTER-Net observations report
Date
2023-07-25T21:39:34Z (2 years 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the IceCube Alert 230725.90 (trigger No 21103478,21h 41m 22.66s , +11d 53m 08.5s, R=0.8107) errorbox 6 sec after notice time and 54 sec after trigger time at 2023-07-25 21:31:45 UT, with upper limit up to 15.7 mag. The observations began at zenith distance = 35 deg. The sun altitude is -27.3 deg.
MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) was pointed to the IceCube Alert 230725.90 errorbox 33 sec after notice time and 82 sec after trigger time at 2023-07-25 21:32:13 UT, with upper limit up to 17.3 mag. The observations began at zenith distance = 57 deg. The sun altitude is -69.5 deg.
The galactic latitude b = -30 deg., longitude l = 67 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2245005
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
60 | 2023-07-25 21:31:45 | MASTER-Kislovodsk | (21h 40m 44.87s , +11d 43m 10.3s) | P| | 10 | 14.6 |
92 | 2023-07-25 21:32:13 | MASTER-SAAO | (21h 41m 27.72s , +11d 41m 44.4s) | P/ | 20 | 16.1 |
92 | 2023-07-25 21:32:13 | MASTER-SAAO | (21h 40m 26.73s , +11d 41m 02.0s) | C | 20 | 17.1 |
96 | 2023-07-25 21:32:16 | MASTER-Kislovodsk | (21h 40m 49.83s , +11d 42m 07.4s) | P| | 20 | 15.7 |
143 | 2023-07-25 21:33:04 | MASTER-SAAO | (21h 41m 26.96s , +11d 40m 09.5s) | P/ | 20 | 16.1 |
143 | 2023-07-25 21:33:04 | MASTER-SAAO | (21h 40m 25.93s , +11d 39m 25.6s) | C | 20 | 17.1 |
146 | 2023-07-25 21:33:07 | MASTER-Kislovodsk | (21h 40m 44.77s , +11d 41m 04.2s) | P| | 20 | 15.4 |
188 | 2023-07-25 21:33:43 | MASTER-SAAO | (21h 41m 29.39s , +11d 41m 43.6s) | P/ | 30 | 15.7 |
188 | 2023-07-25 21:33:43 | MASTER-SAAO | (21h 40m 28.32s , +11d 40m 59.4s) | C | 30 | 16.6 |
193 | 2023-07-25 21:33:48 | MASTER-Kislovodsk | (21h 40m 50.90s , +11d 41m 26.6s) | P| | 30 | 15.0 |
242 | 2023-07-25 21:34:33 | MASTER-SAAO | (21h 41m 22.72s , +11d 40m 52.9s) | P/ | 40 | 16.3 |
243 | 2023-07-25 21:34:33 | MASTER-SAAO | (21h 40m 21.57s , +11d 40m 07.9s) | C | 40 | 17.3 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.