Аннотация:MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy,vol. 2010, 30L)
during LIGO/Virgo S190408an (Singer et al. GCN 24069) South Part Error
Field Inspection (Lipunov et al. GCN 24070)
at MASTER-OAFA found optical transient (no known sources in VIZIER database inside 5")
MASTER OT J140518.22-395309.9 discovery
MASTER auto-detection system discovered OT source at
(RA,Dec2000) = 14h 05m 18.22s -39d 53m 09.9s on 2019-04-09.07809UT.
The OT unfiltered magnitude is 17.4m (mlim=19.1m).
The OT is seen in 2 MASTER LVC inspect images (Pogrosheva et a., ATel #12644). There is no minor planet at this place.
We have reference image without OT on 2018-05-19.13417 UT with 20.2
unfiltered magnitude limit.
There is no any sources in VIZIER database.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/140518.22-395309.9.png
MASTER cover map of Ligo/Virgo S190408an error-field inspection will be
available on-line at:
http://master.sai.msu.ru/static/LVC/MASTER_S190408an_map.jpg
Reduction and observation will be cntinued.
The message may be cited.