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LIGO/Virgo S190425z: MASTER explanation of the nature of an optical flash detected by a Swift as a short flare on a fast-moving WISE brownстатья
- Авторы: Lipunov V., Tyurina N., Gorbovskoy E., Kornilov V., Vlasenko D., Vladimirov V., Zimnukhov D.
- Журнал: GRB Coordinates Network, Circular Service
- Том: 24326
- Номер: 1
- Год издания: 2019
- Аннотация: Global MASTER-Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) started inspect of the LIGO/Virgo S190425z errorbox (Singer et al. GCN 24168) 3133 sec after trigger time at 2019-04-25 09:10:18 UT (Lipunov et al. GCN 24167). MASTER-IAC observed Swift OT (Breeveld et al., GCN 24296) at 2019-04-26 01:45:59 with mlim=20.0, and at 2019-04-26 01:57:23 with mlim=20.0 during automatic inspect of GW190425. There is optical transient with m_OT ~ 19.0 detected at both images. MASTER-OAFA observed these coordinates at 2019-04-26 05:24:35 during automatic GW190425 inspection with unfiltered mlim=19.0. There is no OT detection. MASTER-SAAO observed this area at 2019-04-27 21:15:24 and at 2019-04-27 21:26:02 with mlim=21.0 and at 2019-04-26 04:01:55 with mlim=19.3 during automatic GW190425 inspection . There is no OT detection. All instrumental unfiltered magnitude is W = 0.2B + 0.8R with respect to USNO B reference stars. The object detected by Swift possibly connected with the blue flare on fast moving cool AllWISE star (RA,DEC) = 255.5777822 -12.4869992 (2" per yr!). So this OT not connected with Gravitational Waves Event. You can find below the community observations of the Swift OT region: Telescope Apr Limit OT Filt GCN Zwicky 25.4 20.5 - R 24302 Zwicky 25.4 20.5 - g 24302 ASAS-SN 25.4 18.7 - g 24313 Gattini 25.5 15.2 - J 24306 Zwicky 25.5 20.5 - R 24302 KMTNet SSO 25.6 21.5 - R 24318 MASTER-IAC 26.1 20.0 19.0 W This MASTER-OAFA 26.2 19.0 19.0 W This Zwicky 26.3 20.5 - g 24302 Gattini 26.4 15.2 - J 24306 Zwicky 26.5 20.4 - R 24302 ASAS-SN 26.5 18.7 - g 24313 Swift 26.8 ? 17.7 U 24296 ASAS-SN 27.3 18.4 - g 24313 MASTER-SAAO 27.88 21.0 - W This LCO SAAO 27.9 21.5 - R 24307 Lulin 28.8 21.5 - R 24301 These data do not contradict the hypothesis of a short (10-15 minutes flash) on a red-brown dwarf. The message may be cited.
- Добавил в систему: Липунов Владимир Михайлович