TITLE: GCN CIRCULAR NUMBER: 33388 SUBJECT: Fermi trigger No 699294715: Global MASTER-Net observations report DATE: 23/03/01 13:15:10 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 GRB230228.69 (trigger No 699294715,17h 57m 43.92s , -15d 45m 00.0s, R=3.42) errorbox 28985 sec after notice time and 29017 sec after trigger time at 2023-03-01 00:35:27 UT, with upper limit up to 18.8 mag. The observations began at zenith distance = 73 deg. The sun altitude is -43.0 deg.

The galactic latitude b = 4 deg., longitude l = 13 deg.

Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2201693

We obtain a following upper limits.

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

29047 | 2023-03-01 00:35:27 | MASTER-SAAO | (17h 48m 26.88s , -16d 01m 12.6s) | C | 60 | 17.4 | 29047 | 2023-03-01 00:35:27 | MASTER-SAAO | (17h 49m 20.77s , -16d 01m 29.8s) | C | 60 | 17.0 | 29417 | 2023-03-01 00:41:37 | MASTER-SAAO | (17h 56m 42.58s , -15d 59m 46.5s) | C | 60 | 17.6 | 29417 | 2023-03-01 00:41:38 | MASTER-SAAO | (17h 57m 36.40s , -16d 00m 04.4s) | C | 60 | 17.0 | 29497 | 2023-03-01 00:42:57 | MASTER-SAAO | (17h 54m 41.75s , -14d 05m 59.5s) | C | 60 | 17.8 | 29497 | 2023-03-01 00:42:57 | MASTER-SAAO | (17h 55m 35.07s , -14d 06m 17.1s) | C | 60 | 17.3 | 29588 | 2023-03-01 00:44:28 | MASTER-SAAO | (18h 02m 49.84s , -14d 06m 55.2s) | C | 60 | 18.1 | 29588 | 2023-03-01 00:44:28 | MASTER-SAAO | (18h 03m 43.10s , -14d 07m 12.4s) | C | 60 | 17.0 | 29668 | 2023-03-01 00:45:48 | MASTER-SAAO | (17h 59m 13.37s , -17d 54m 45.7s) | C | 60 | 17.8 | 29668 | 2023-03-01 00:45:48 | MASTER-SAAO | (18h 00m 07.77s , -17d 55m 03.3s) | C | 60 | 17.3 | 29758 | 2023-03-01 00:47:18 | MASTER-SAAO | (18h 07m 32.32s , -17d 55m 58.7s) | C | 60 | 18.0 | 29758 | 2023-03-01 00:47:18 | MASTER-SAAO | (18h 08m 26.67s , -17d 56m 15.9s) | C | 60 | 17.2 | 30021 | 2023-03-01 00:51:41 | MASTER-SAAO | (17h 48m 22.60s , -16d 01m 08.3s) | C | 60 | 17.5 | 30021 | 2023-03-01 00:51:41 | MASTER-SAAO | (17h 49m 16.71s , -16d 01m 25.0s) | C | 60 | 17.3 | 30101 | 2023-03-01 00:53:01 | MASTER-SAAO | (17h 44m 03.88s , -17d 54m 45.7s) | C | 60 | 17.2 | 30101 | 2023-03-01 00:53:01 | MASTER-SAAO | (17h 43m 09.07s , -17d 54m 29.4s) | C | 60 | 17.4 | 30191 | 2023-03-01 00:54:31 | MASTER-SAAO | (17h 52m 27.51s , -17d 53m 58.4s) | C | 60 | 17.3 | 30191 | 2023-03-01 00:54:31 | MASTER-SAAO | (17h 51m 32.76s , -17d 53m 41.9s) | C | 60 | 17.5 | 30271 | 2023-03-01 00:55:51 | MASTER-SAAO | (18h 05m 02.58s , -16d 02m 18.4s) | C | 60 | 17.4 | 30271 | 2023-03-01 00:55:51 | MASTER-SAAO | (18h 04m 08.62s , -16d 02m 01.2s) | C | 60 | 17.8 | 30362 | 2023-03-01 00:57:22 | MASTER-SAAO | (18h 13m 28.35s , -16d 02m 02.6s) | C | 60 | 17.0 | 30362 | 2023-03-01 00:57:22 | MASTER-SAAO | (18h 12m 34.45s , -16d 01m 45.0s) | C | 60 | 17.7 | 30441 | 2023-03-01 00:58:41 | MASTER-SAAO | (17h 57m 36.16s , -16d 00m 12.6s) | C | 60 | 17.4 | 30441 | 2023-03-01 00:58:41 | MASTER-SAAO | (17h 56m 42.02s , -15d 59m 55.4s) | C | 60 | 17.5 | 30532 | 2023-03-01 01:00:12 | MASTER-SAAO | (17h 54m 37.51s , -14d 07m 38.1s) | C | 60 | 17.8 | 30532 | 2023-03-01 01:00:12 | MASTER-SAAO | (17h 55m 31.22s , -14d 07m 55.2s) | C | 60 | 17.6 | 30614 | 2023-03-01 01:01:34 | MASTER-SAAO | (18h 03m 48.99s , -14d 06m 36.0s) | C | 60 | 17.9 | 30614 | 2023-03-01 01:01:34 | MASTER-SAAO | (18h 02m 55.35s , -14d 06m 18.7s) | C | 60 | 18.2 | 30694 | 2023-03-01 01:02:54 | MASTER-SAAO | (18h 00m 02.30s , -17d 55m 13.3s) | C | 60 | 17.5 | 30694 | 2023-03-01 01:02:54 | MASTER-SAAO | (17h 59m 07.34s , -17d 54m 56.4s) | C | 60 | 17.8 | 30785 | 2023-03-01 01:04:25 | MASTER-SAAO | (18h 07m 31.40s , -17d 54m 08.5s) | C | 60 | 18.2 | 30785 | 2023-03-01 01:04:25 | MASTER-SAAO | (18h 08m 26.32s , -17d 54m 25.4s) | C | 60 | 17.8 | 30865 | 2023-03-01 01:05:45 | MASTER-SAAO | (17h 39m 48.62s , -14d 07m 49.2s) | C | 60 | 17.3 | 30865 | 2023-03-01 01:05:45 | MASTER-SAAO | (17h 38m 54.38s , -14d 07m 33.3s) | C | 60 | 17.4 | 30955 | 2023-03-01 01:07:15 | MASTER-SAAO | (17h 47m 13.60s , -14d 07m 17.5s) | C | 60 | 17.8 | 30955 | 2023-03-01 01:07:15 | MASTER-SAAO | (17h 48m 07.85s , -14d 07m 33.3s) | C | 60 | 17.7 | 31035 | 2023-03-01 01:08:35 | MASTER-SAAO | (17h 49m 16.19s , -16d 00m 32.4s) | C | 60 | 17.4 | 31035 | 2023-03-01 01:08:35 | MASTER-SAAO | (17h 48m 21.32s , -16d 00m 17.0s) | C | 60 | 17.5 | 31126 | 2023-03-01 01:10:06 | MASTER-SAAO | (17h 43m 10.18s , -17d 55m 11.3s) | C | 60 | 17.3 | 31126 | 2023-03-01 01:10:06 | MASTER-SAAO | (17h 44m 05.86s , -17d 55m 26.2s) | C | 60 | 17.3 | 31206 | 2023-03-01 01:11:26 | MASTER-SAAO | (17h 51m 38.59s , -17d 54m 12.3s) | C | 60 | 17.4 | 31206 | 2023-03-01 01:11:26 | MASTER-SAAO | (17h 52m 34.23s , -17d 54m 27.4s) | C | 60 | 17.4 | 31298 | 2023-03-01 01:12:58 | MASTER-SAAO | (18h 04m 08.46s , -16d 01m 13.0s) | C | 60 | 17.7 | 31298 | 2023-03-01 01:12:58 | MASTER-SAAO | (18h 05m 03.32s , -16d 01m 28.8s) | C | 60 | 17.6 | 31388 | 2023-03-01 01:14:28 | MASTER-SAAO | (18h 12m 27.88s , -16d 00m 24.7s) | C | 60 | 17.7 | 31388 | 2023-03-01 01:14:28 | MASTER-SAAO | (18h 13m 22.63s , -16d 00m 41.4s) | C | 60 | 17.5 | 31468 | 2023-03-01 01:15:48 | MASTER-SAAO | (17h 56m 44.34s , -16d 01m 03.1s) | C | 60 | 17.4 | 31468 | 2023-03-01 01:15:48 | MASTER-SAAO | (17h 57m 39.33s , -16d 01m 19.5s) | C | 60 | 17.4 | 31559 | 2023-03-01 01:17:19 | MASTER-SAAO | (17h 54m 34.07s , -14d 08m 02.2s) | C | 60 | 17.3 | 31559 | 2023-03-01 01:17:19 | MASTER-SAAO | (17h 55m 28.57s , -14d 08m 18.7s) | C | 60 | 17.3 | 31639 | 2023-03-01 01:18:39 | MASTER-SAAO | (18h 02m 54.88s , -14d 08m 09.4s) | C | 60 | 18.0 | 31639 | 2023-03-01 01:18:39 | MASTER-SAAO | (18h 03m 49.29s , -14d 08m 26.2s) | C | 60 | 18.0 | 31729 | 2023-03-01 01:20:09 | MASTER-SAAO | (17h 59m 08.59s , -17d 54m 23.8s) | C | 60 | 17.6 | 31729 | 2023-03-01 01:20:09 | MASTER-SAAO | (18h 00m 04.28s , -17d 54m 40.1s) | C | 60 | 17.7 | 31809 | 2023-03-01 01:21:29 | MASTER-SAAO | (18h 07m 33.07s , -17d 56m 12.2s) | C | 60 | 18.2 | 31809 | 2023-03-01 01:21:29 | MASTER-SAAO | (18h 08m 28.64s , -17d 56m 29.0s) | C | 60 | 18.0 | 31901 | 2023-03-01 01:23:01 | MASTER-SAAO | (17h 38m 58.94s , -14d 05m 55.0s) | C | 60 | 17.4 | 31901 | 2023-03-01 01:23:01 | MASTER-SAAO | (17h 39m 53.70s , -14d 06m 11.4s) | C | 60 | 17.5 | 31992 | 2023-03-01 01:24:32 | MASTER-SAAO | (17h 47m 06.33s , -14d 06m 56.0s) | C | 60 | 17.8 | 31992 | 2023-03-01 01:24:32 | MASTER-SAAO | (17h 48m 01.01s , -14d 07m 12.8s) | C | 60 | 17.8 | 32072 | 2023-03-01 01:25:52 | MASTER-SAAO | (17h 43m 07.31s , -17d 53m 49.0s) | C | 60 | 17.3 | 32072 | 2023-03-01 01:25:52 | MASTER-SAAO | (17h 44m 03.25s , -17d 54m 05.2s) | C | 60 | 17.4 | 32163 | 2023-03-01 01:27:23 | MASTER-SAAO | (17h 51m 36.15s , -17d 55m 02.8s) | C | 60 | 17.4 | 32163 | 2023-03-01 01:27:23 | MASTER-SAAO | (17h 52m 31.96s , -17d 55m 19.4s) | C | 60 | 17.6 | 32242 | 2023-03-01 01:28:42 | MASTER-SAAO | (18h 04m 06.52s , -16d 02m 22.8s) | C | 60 | 17.7 | 32242 | 2023-03-01 01:28:42 | MASTER-SAAO | (18h 05m 01.52s , -16d 02m 39.8s) | C | 60 | 17.8 | 32333 | 2023-03-01 01:30:13 | MASTER-SAAO | (18h 12m 31.70s , -16d 02m 18.7s) | C | 60 | 17.5 | 32333 | 2023-03-01 01:30:13 | MASTER-SAAO | (18h 13m 26.61s , -16d 02m 36.0s) | C | 60 | 17.5 | 32413 | 2023-03-01 01:31:33 | MASTER-SAAO | (17h 46m 21.52s , -12d 13m 41.1s) | C | 60 | 18.3 | 32413 | 2023-03-01 01:31:33 | MASTER-SAAO | (17h 47m 15.75s , -12d 13m 58.1s) | C | 60 | 18.4 | 32504 | 2023-03-01 01:33:04 | MASTER-SAAO | (17h 54m 35.90s , -12d 12m 24.4s) | C | 60 | 18.0 | 32504 | 2023-03-01 01:33:04 | MASTER-SAAO | (17h 55m 30.02s , -12d 12m 41.3s) | C | 60 | 18.0 | 32596 | 2023-03-01 01:34:36 | MASTER-SAAO | (17h 55m 07.83s , -19d 48m 10.0s) | C | 60 | 17.9 | 32596 | 2023-03-01 01:34:36 | MASTER-SAAO | (17h 56m 04.34s , -19d 48m 26.4s) | C | 60 | 18.2 | 32675 | 2023-03-01 01:35:55 | MASTER-SAAO | (18h 03m 44.61s , -19d 49m 24.3s) | C | 60 | 18.5 | 32675 | 2023-03-01 01:35:55 | MASTER-SAAO | (18h 04m 41.05s , -19d 49m 41.1s) | C | 60 | 18.7 | 32766 | 2023-03-01 01:37:26 | MASTER-SAAO | (18h 11m 24.45s , -19d 50m 31.6s) | C | 60 | 18.3 | 32766 | 2023-03-01 01:37:26 | MASTER-SAAO | (18h 12m 20.80s , -19d 50m 48.9s) | C | 60 | 18.3 | 32939 | 2023-03-01 01:40:19 | MASTER-SAAO | (17h 38m 53.75s , -14d 07m 35.9s) | C | 60 | 17.7 | 32939 | 2023-03-01 01:40:19 | MASTER-SAAO | (17h 39m 48.66s , -14d 07m 52.8s) | C | 60 | 17.9 | 33018 | 2023-03-01 01:41:38 | MASTER-SAAO | (17h 47m 12.46s , -14d 06m 20.8s) | C | 60 | 17.9 | 33018 | 2023-03-01 01:41:38 | MASTER-SAAO | (17h 48m 07.28s , -14d 06m 37.8s) | C | 60 | 17.9 | 33110 | 2023-03-01 01:43:10 | MASTER-SAAO | (18h 01m 51.29s , -12d 12m 29.0s) | C | 60 | 18.0 | 33110 | 2023-03-01 01:43:10 | MASTER-SAAO | (18h 02m 45.44s , -12d 12m 46.6s) | C | 60 | 18.2 | 33201 | 2023-03-01 01:44:41 | MASTER-SAAO | (18h 11m 03.70s , -12d 13m 59.8s) | C | 60 | 18.5 | 33201 | 2023-03-01 01:44:41 | MASTER-SAAO | (18h 10m 09.62s , -12d 13m 41.8s) | C | 60 | 18.4 | 33372 | 2023-03-01 01:47:32 | MASTER-SAAO | (17h 40m 49.28s , -15d 59m 57.3s) | C | 60 | 17.5 | 33372 | 2023-03-01 01:47:32 | MASTER-SAAO | (17h 41m 44.90s , -16d 00m 13.3s) | C | 60 | 17.6 | 33451 | 2023-03-01 01:48:51 | MASTER-SAAO | (17h 46m 19.96s , -12d 14m 00.8s) | C | 60 | 18.3 | 33451 | 2023-03-01 01:48:51 | MASTER-SAAO | (17h 47m 14.47s , -12d 14m 17.2s) | C | 60 | 18.4 | 33542 | 2023-03-01 01:50:22 | MASTER-SAAO | (17h 54m 34.71s , -12d 12m 34.3s) | C | 60 | 18.1 | 33542 | 2023-03-01 01:50:22 | MASTER-SAAO | (17h 55m 29.13s , -12d 12m 50.8s) | C | 60 | 18.3 | 33622 | 2023-03-01 01:51:42 | MASTER-SAAO | (17h 55m 07.22s , -19d 49m 20.1s) | C | 60 | 17.9 | 33622 | 2023-03-01 01:51:42 | MASTER-SAAO | (17h 56m 04.07s , -19d 49m 36.4s) | C | 60 | 18.3 | 33713 | 2023-03-01 01:53:13 | MASTER-SAAO | (18h 03m 37.48s , -19d 48m 35.0s) | C | 60 | 18.4 | 33713 | 2023-03-01 01:53:13 | MASTER-SAAO | (18h 04m 34.27s , -19d 48m 51.4s) | C | 60 | 18.7 | 33803 | 2023-03-01 01:54:43 | MASTER-SAAO | (18h 12m 18.71s , -19d 50m 03.9s) | C | 60 | 18.4 | 33803 | 2023-03-01 01:54:43 | MASTER-SAAO | (18h 11m 21.99s , -19d 49m 47.2s) | C | 60 | 18.3 | 34053 | 2023-03-01 01:58:53 | MASTER-SAAO | (17h 47m 30.44s , -19d 49m 52.9s) | C | 60 | 17.7 | 34053 | 2023-03-01 01:58:53 | MASTER-SAAO | (17h 48m 27.47s , -19d 50m 09.2s) | C | 60 | 17.9 | 34144 | 2023-03-01 02:00:24 | MASTER-SAAO | (18h 01m 56.99s , -12d 12m 42.1s) | C | 60 | 18.0 | 34144 | 2023-03-01 02:00:24 | MASTER-SAAO | (18h 02m 51.45s , -12d 12m 59.1s) | C | 60 | 18.3 | 34225 | 2023-03-01 02:01:45 | MASTER-SAAO | (18h 10m 02.74s , -12d 13m 51.4s) | C | 60 | 18.4 | 34225 | 2023-03-01 02:01:45 | MASTER-SAAO | (18h 10m 57.11s , -12d 14m 08.8s) | C | 60 | 18.8 | 34406 | 2023-03-01 02:04:46 | MASTER-SAAO | (17h 41m 46.86s , -16d 01m 18.3s) | C | 60 | 17.6 | 34406 | 2023-03-01 02:04:46 | MASTER-SAAO | (17h 40m 51.05s , -16d 01m 01.9s) | C | 60 | 17.5 | 34486 | 2023-03-01 02:06:06 | MASTER-SAAO | (17h 47m 10.02s , -12d 14m 30.7s) | C | 60 | 18.4 | 34486 | 2023-03-01 02:06:06 | MASTER-SAAO | (17h 46m 15.25s , -12d 14m 14.4s) | C | 60 | 18.3 | 34577 | 2023-03-01 02:07:37 | MASTER-SAAO | (17h 55m 28.62s , -12d 14m 43.1s) | C | 60 | 18.4 | 34577 | 2023-03-01 02:07:37 | MASTER-SAAO | (17h 54m 33.90s , -12d 14m 26.6s) | C | 60 | 18.1 | 34656 | 2023-03-01 02:08:56 | MASTER-SAAO | (17h 56m 05.97s , -19d 49m 03.5s) | C | 60 | 18.3 | 34656 | 2023-03-01 02:08:56 | MASTER-SAAO | (17h 55m 08.78s , -19d 48m 47.4s) | C | 60 | 17.9 | 34747 | 2023-03-01 02:10:27 | MASTER-SAAO | (18h 04m 36.19s , -19d 50m 46.9s) | C | 60 | 18.8 | Filter C is a clear (unfiltred) band.

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