MASTER: four OT detection

ATel #13414; P. Balanutsa, T. Pogrosheva, V. Lipunov (Lomonosov MSU), E. Gorbovskoy, V. Kornilov, N. Tiurina, A. Kuznetsov, V. Chazov, V. Vladimirov, I. Gorbunov, V. Shumkov, A. Tlatov, D. Dormidontov, A. V. Parhomenko (KSS of the Pulkovo Observatory), O. A. Gres, N. M. Budnev (Irkutsk State University, API), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory)
on 22 Jan 2020; 12:21 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J083640.25-041306.4 discovery

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 08h 36m 40.25s -04d 13m 06.4s on 2020-01-03.94150 UT. The OT unfiltered magnitude is 18.3m (limit 19.5m).
We see an object in two tubes in two time intervals. Then the object is not visible.
There is no minor planet at this place.
We have reference image without OT on 2019-02-05.85014 UT with unfiltered magnitude limit 19.9m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/083640.25-041306.4.png

OT MASTER OT J022753.99+004441.0 discovery

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 02h 27m 53.99s +00d 44m 41.0s on 2020-01-15.87453 UT. The OT unfiltered magnitude is 18.5m (limit 19.8m).
The OT is seen in 4 images. There is no minor planet at this place.
We have reference image on 2018-11-04.11958 UT with unfiltered mlim= 20.2m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/022753.99004441.0.png

MASTER OT J074402.06+204923.9 discovery possible CV

MASTER-Tunka auto-detection system discovered OT source at (RA, Dec)= 07h 44m 02.06s +20d 49m 23.9s on 2020-01-14.70319 UT. The OT unfiltered magnitude is 17.9m (limit 18.6m).
The OT is seen in 3 images. There is no minor planet at this place.
We have reference image on 2018-10-21.78576 UT with unfiltered mlim= 19.3m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/074402.06204923.9.png

MASTER OT J023226.17-485117.1 discovery

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec)= 02h 32m 26.17s -48d 51m 17.1s on 2020-01-16.84956 UT. The OT unfiltered magnitude is 18.3m (limit 20.1m).
The OT is seen in 3 images. There is no minor planet at this place.
We have reference image on 2017-08-15.10072 UT with unfiltered mlim= 21.0m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/023226.17-485117.1.png