Аннотация:MASTER OT J041758.27-025019.0 detection - QSO optical flare(5mag amplitude)
MASTER-Tunka auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 04h 17m 58.27s -02d 50m 19.0s on 2018-10-01.86697 UT.
The OT unfiltered magnitude is 17.0m (limit 18.8m).
The OT is seen in 6 images. There is no minor planet at this place.
We have reference image without OT on 2010-09-20.88556 UT with unfiltered magnitude limit 19.4m |(MASTER-Tunka), on 2015-12-18 18:13:44UT with mlim=19.0, on 2012-09-28 01:34:33 with mlim=19.4 (MASTER-Kislovodsk), .
There are previous outbursts in MASTER-Kislovodsk database
Date,UT | unfiltered_magnitude
2010-09-21 00:56:26.899 19.5
2010-11-13 20:29:27 <18.9 (marginally seen, mlim=18.9)
2011-10-28 22:19:23.329 17.0
2012-09-28 00:34:26.238 17.6
2014-02-15 17:27:13.053 16.5
There is no USNO-B1 sources, there is GSC2.3.2 blue source with jmag=22.19.
This source is also radio source and a WISE candidate to gamma-ray blazar radio sources (D'Abrusco et al. 2014)
Spectral observations are required.
The discovery and reference images are available at
http://master.sai.msu.ru/static/OT/MASTEROTJ041758.27-025019.0.jpg