MASTER: CV, DNe, variables.

ATel #7218; P. Balanutsa, O. Gress, V. Lipunov, E. Gorbovskoy (Lomonosov MSU), D. Buckley (SAAO), S. Antipin, N. Tiurina, V. Kornilov, A. Kuznetsov, V. Chazov, V. Vladimirov, D. Kuvshinov, S. Shurpakov, V. Shumkov (Lomonosov Moscow State University, SAI), S. Potter, A. Kniazev, M. Kotze (The South African Astronomical Observatory), O. Gress, K. Ivanov, N. Budnev, S. Yazev, V. Poleshchuk, E. Konstantinov, O. Chuvalaev (Irkutsk State University), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko, (Kislovodsk solar station of the Pulkovo observatory RAS), V. Yurkov, Y. Sergienko, A. Gabovich (Blagoveshchensk Educational University), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University)
on 13 Mar 2015; 12:57 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J105529.06-255654.5 discovery - new CV

MASTER-SAAO auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 10h 55m 29.06s -25d 56m 54.5s on 2015-03-11.89942 UT.

The OT unfiltered magnitude is 17.8m (the limit is 19.6m).
There are 14 images with OT at this night. There is no minor planet at this place.
We have reference image without OT on 2014-12-24.07543 UT with 19.8 unfiltered magnitude limit and on 2015-01-18.932 with 19.7m lim in MASTER-SAAO database.
This OT is identified with 0640-0256591 USNO source with B=20.92m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/105529.06-255654.5.png

MASTER OT J115850.90-743051.6 discovery - Dwarf Nova
MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 11h 58m 50.90s -74d 30m 51.6s on 2015-03-12.98816 UT.
The OT unfiltered magnitude is 17.4m (the limit is 19.2m).
There are 3 images with OT. There are several images without OT on 1,3,4,6 Jan 2015 with 19.0-19.2 unfiltered limit.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/115850.90-743051.6.png

MASTER OT J150504.52-391115.6 doscpvery - Dwarf Nova

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 15h 05m 04.52s -39d 11m 15.6s on 2015-03-05.92345 UT.
The OT unfiltered magnitude is 17.0m (the limit is 18.2m).
There are following images with OT in MASTER-SAAO database.
Date timeUT m_OT err
2015-01-05 01:38:55.413 17.2 +-0.1
2015-01-06 01:40:56.892 17.7 +-0.1
2015-03-05 22:17:43.183 17.2 +-0.1
We have reference image without OT on 2015-01-01.09017 UT with 19.0 unfiltered magnitude limit.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/150504.52-391115.6.png

MASTER OT J094713.57-724822.1 discovery

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 09h 47m 13.57s -72d 48m 22.1s on 2015-03-09.93512 UT.
The OT unfiltered magnitude is 18.1m (the limit is 18.4m).
There are 2 images with OT (18.1) on 2015-04-09.9*, images with unfiltered m_OT=18.1 on 2015-03-10.879, and with unfiltered m_OT=18.1 on 2015-03-11.835UT in MASTER-SAAO database.

We have reference image without OT on 2015-01-18.00293 UT with 19.7 unfiltered magnitude limit.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/094713.57-724822.1_2.png

MASTER OT J094713.55-724822.4 discovery

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 09h 47m 13.55s -72d 48m 22.4s on 2015-03-10.88492 UT.
The OT unfiltered magnitude is 18.0m (the limit is 19.6m).
There are: 2 images with m_OT=18.0 on 2015-03-10.8*, images with m_OT=18.0 on 2015-03-10.927(m_lim=19.9), with m_OT=18.0 on 2015-03-11.873(m_lim=20.2) in MASTER-SAAO database.
We have reference image without OT on 2015-01-18.00293 UT with 19.7 unfiltered magnitude limit and on 2015-01-03 with unfiltered m_lim=19.3.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/094713.55-724822.4.png

MASTER Global Robotic Net