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IceCube-220425A: MASTER: flaring blazar TXS 1742-078 as the possible neutrino source candidateстатья Электронная публикация
- Авторы: Zhirkov K., Lipunov
- Журнал: GCN circular
- Том: 31948
- Год издания: 2022
- Первая страница: 1
- Аннотация: MASTER-OAGH was the first telescope of MASTER-NET to observe IC-220425’s error-box at 2022-04-25 06:35:11 UTC, 13813 sec after the trigger (Lipunov et al., GCN #31946). We report on the detection of a flaring blazar TXS 1742-078 (RA=266.3629 Dec=-7.8844). IC-220425A is a track-like event with an estimated energy of 600 TeV and signalness of 17%. It was detected at 2022-04-25 02:44:58 UTC and is centred at RA=268.24 (+1.98, -1.66 deg, 90% PSF containment), Dec=-10.73 (+1.71, -1.48 deg, 90% PSF containment) J2000(GCN #31944). The first image of TXS 1742-078 was obtained at 2022:04-25 06:36:32 UTC. It is located 3.4 deg away from the center of error-box. Based on our photometry, the blazar is currently experiencing a flaring episode (W=17.3+/-0.1, no correction for extinction), compared to its quiscence state (W=19.2+/-0.3). Judging from ATLAS observations(Smith et al, PASP 132, 2020)(https://fallingstar- data.com/forcedphot/queue/195704/plot.pdf) it is 31944the brightest flare since 2017. Interestingly enough, after the correction for galactic extinction(Schlafly and Finkbeiner, 2011) (A_V=3.18), magnitude of TXS 1742-078 (W=14.1+/-0.1) is close to that of TXS 0506+056 during IC-170922A (W=14.3, no correction for extinction). Judging from these facts, we highly encourage multiwavelength observations to determine whether or not this blazar is a source of IC-220425A The observation and reduction will continue. The message may be cited.
- Добавил в систему: Липунов Владимир Михайлович