Аннотация:MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)
started inspect of GW190426 / LIGO/Virgo S190426c errorbox (Chatterjee et al. GCN 24237 https://gcn.gsfc.nasa.gov/other/S190426c.gcn3 )
at 2019-04-26 16:15:47 UT (Lipunov et al. GCN 24236) and continuied several nights.
There is no OTs at GRAWITA positions ( Izzo et al. GCN 24340 ) several hours befor
1) 21 57 16.26 +83 22 39.4
Date_UT unfiltmlim MASTER_observatory
2019-04-26 20:38:02 19.6 MASTER-Kislovodsk
2019-04-26 18:38:53 19.6 MASTER-Tavrida
2019-04-26 16:41:15 19.2 MASTER-Tunka
There is variable star in 5", presented in GSC2.3.2 (red fmag=19.9 in 1996), PanSTARR source with rmag=20.73(2010Dec30). It's not presented in
USNO-B1, it means 22mPOSS limit in history.
2) 22:01:04.54 +83:48:36.9
Date_UT unfiltmlim MASTER_observatory
2019-04-26 20:38:02 19.6 MASTER-Kislovodsk
2019-04-26 18:38:53 19.6 MASTER-Tavrida
2019-04-26 16:25:18 19.6 MASTER-Tunka
2019-04-27 11:59:22 16.5 MASTER-Amur
there is also a star in 6.9" in PanSTARR catalogue with imag=21.14 (no g,r)
3) 22 00 50.38 +84 44 36.5
Date_UT unfiltmlim MASTER_observatory
2019-04-26 20:56:51 20.0 MASTER-Tavrida
2019-04-26 20:38:02 19.7 MASTER-Kislovodsk
2019-04-26 16:25:18 19.5 MASTER-Tunka
There is a star in 4.3" in USNO-B1 (B1=20.77,R1=19.08) with proper motion .
The message may be cited.