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GRB 230204B: MASTER early OT detectionстатья
- Авторы: Lipunov V., Buckley D.A.H, Chasovnikov A., Kechin Ya, Kuznetsov A., Tiurina N., Gress O., Gorbovskoy E., Antipov G., Balanutsa P., Zhirkov K., Vlasenko D., Senik V., Kuvshinov D., Topolev V., Tselik Yu, Cheryasov D., Gorbunov I., Francile C., Podesta R., Podesta F., Rebolo R., Serra M., Carrasco L., Valdes J.R., Chavushyan V., Patino Alvarez V.M., Martinez J., Corella A., Rodriguez L.H., Budnev N.M., Tlatov A., Dormidontov D., Gabovich A., Yurkov V.
- Журнал: GCN circular
- Том: 33301
- Год издания: 2023
- Первая страница: 1
- Аннотация: MASTER OT J131034.94-214304.8 early detection of MAXI GRB 230204B optical counterpart (Swain et al. GCN 33269, Smartt et al. GCN 33278, Saccardi et al. GCN 33281, Ror et al. GCN 33284, Siegel et al. GCN 33292, Strausbaugh et al. GCN 33293) MASTER-SAAO robotic telescope (Global MASTER-Net http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, v.2010, 30L) located in South African Astronomical Observatory, started inspect of the MAXI GRB230204.91 (trigger 979708795, 13h10m14.88s, -22d02m13.2s, R=1deg, Serino et al. GCN 33265; Kennea et al. GCN 33267, Waratkar et al. GCN 33268, Casentini et al. GCN 33272, Dafcikova et al. GCN 33273, D’Elia et al. GCN 33285, Poolakkil et al. GCN 33288) errorbox 85 sec after notice time (1075 sec after trigger time) at 2023-02-04 22:06:06 UT with upper limit to 19.4m ( unfiltered ) . Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2196693 The observations began at zenith distance = 63 deg. The sun altitude: -40.5 deg., the distance to Moon (alt=12 deg.) was 89 deg., the Moon phase 0.99). The galactic latitude b = 40 deg., longitude l = 309 deg. MASTER-SAAO auto-detection system ( Lipunov et al., 2010 ) detected OT source at (RA, Dec) = 13h 10m 34.94s -21d 43m 04.8s at 2023-02-04.92090 UT. The OT unfiltered magnitude at first image is 12.9m (mlim=17.6). Automatic light curve decay has pecularity. We have reference image on 2020-04-24.82001 UT with unfiltered mlim=20.6m. We observed this field also in very wide field cameras (MASTER-VWFC). The reduction will be continued.
- Добавил в систему: Липунов Владимир Михайлович