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MASTER-SAAO: new CVs

ATel #7111; O. Gress, P. Balanutsa, V. Lipunov, E. Gorbovskoy, S. Antipin (Lomonosov MSU, SAI), D. Buckley (SAAO), V. Kornilov, A. Kuznetsov, N. Tiurina , V. Chazov, D. Denisenko (Lomonosov Moscow State University, SAI), S. Potter, A. Kniazev, M. Kotze (South African Observatory), K. Ivanov, N. Budnev, S. Yazev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk (Irkutsk State University), A. Tlatov, D. Dormidontov, V. Senik, A. Parkhomenko, (Kislovodsk solar station of the Pulkovo observatory RAS), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov (Ural Federal University), V. Yurkov, Y. Sergienko, A. Gabovich (Blagoveshchensk Educational University), V. Shumkov, S. Shurpakov (MASTER team members)
on 19 Feb 2015; 15:47 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Cataclysmic Variable, Star, Transient, Variables

MASTER OT J030423.41-364625.2 - possible new CV

MASTER-SAAO auto-detection system , see Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 , discovered OT source at (RA, Dec) = 03h 04m 23.41s -36d 46m 25.2s on 2015-02-15.868 UT. The OT unfiltered magnitude is 19.5m (the limit is 20.5m).

There are 6 images with OT. We have reference image without OT on 2014-12-24.83718 UT with 20.2 unfiltered magnitude limit.

There is no minor planet at this place. There is no any source inside 8" in VIZIER database.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTER030423.41-364625.2.jpg

Spectral observations are required.

MASTER OT J131509.11-364852.6 - possible new CV

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 13h 15m 09.11s -36d 48m 52.6s on 2015-02-16.09259 UT.

The OT unfiltered magnitude is 18.2m , the limit 19.9m. The OT is seen in 7 images. We have reference image without OT on 2015-01-11.03862 UT with 19.2 unfiltered magnitude limit.

There is no any source inside 5" in VIZIER database. But there is a faint source in I at DSS image on 1994.

There is no minor planet at this place.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/ J131509.11-364852.6.jpg"> http://master.sai.msu.ru/static/OT/ J131509.11-364852.6.jpg

MASTER OT J131401.65-302221.1 - possible new CV

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 13h 14m 01.65s -30d 22m 21.1s on 2015-02-18.02144 UT. The OT unfiltered magnitude is 16.6m (the limit is 20.4m).

There are 9 images with this OT in MASTER-SAAO database on 2015-02-18. We have reference image without OT on 2015-01-19.04913 UT with 19.9 unfiltered magnitude limit.

There is no minor planet at this place. There is no any source inside 5” in VIZIER.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ131401.65-302221.1.jpg

Spectral observations are required.

MASTER OT J123532.20-361900.9

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 12h 35m 32.20s -36d 19m 00.9s on 2015-02-14.988 UT. The OT’s unfiltered magnitude is 17.5m (the limit is 20.7m). The OT is 16.5m in I-band, 18.8 in B-band on 2015-02-18.876UT.

There are 30 images with OT on 2015-02-09 in MASTER-SAAO database. We have 1 image with OT at 2015-01-17.001. There is nothing in DSS archive, but this star can have high proper motion.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ123532.20-361900.9.jpg

Spectral observations are required.

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net