MASTER: 4 optical transients discovery

ATel #7127; V. Shumkov, P. Balanutsa, O. Gress, V. Vladimirov, V. Lipunov, E. Gorbovskoy (Lomonosov MSU, SAI), D. Buckley (SAAO), V. Kornilov, A. Kuznetsov, N. Tiurina , V. Chazov, S. Shurpakov, 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)
on 23 Feb 2015; 12:31 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J100540.87+134751.1 - possible SuperNova

MASTER-Kislovodsk auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 10h 05m 40.87s +13d 47m 51.1s on 2015-02-21.85407 UT.

The SN unfiltered magnitude is 18.2m (limit 20.2m). The OT is seen in 6 images. There is no minor planet at this place.We have reference image without SN on 2010-02-07.88314 UT with unfiltered magnitude limit 20.0m.

The discovery and reference images are available at: : http://master.sai.msu.ru/static/OT/100540.87134751.1.png

Spectral observations are required.

MASTER OT J061451.70-272535.5 - new CV

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 06h 14m 51.70s -27d 25m 35.5s on 2015-02-19.96990 UT.

The OT unfiltered magnitude is 18.3m (limit 19.4m).There are 5 images in MASTER-SAAO database on 2015-02-19. We have reference image without OT on 2015-02-06.92896 UT with 19.4m unfiltered magnitude limit. We have image with OT (m_OT=18.8) on 2015-01-10.996 UT (the unfiltered limit is 18.8).

Spectral observations are required.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ061451.70-272535.5.jpg

MASTER OT J125857.30-284131.5 - new CV

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 12h 58m 57.30s -28d 41m 31.5s on 2015-02-21.94970 UT. The OT unfiltered magnitude is 18.0m (the limit is 20.2m).

There are 7 images with OT in MASTER-SAAO database . We have reference image without OT on 2015-01-19.05605 UT with unfiltered magnitude limit 19.8m.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ125857.30-284131.5.jpg

Spectral observations are required.

MASTER OT J185727.96+153920.8 - new CV

MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 18h 57m 27.96s +15d 39m 20.8s on 2015-02-23.09990 UT.

The OT unfiltered magnitude is 16.2m (the limit is 18.6m).The OT is seen in 3 images.

We have reference image without OT on 2014-11-19.64175 UT with unfiltered magnitude limit 18.5m.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/185727.96153920.8.png

Spectral observations are required.

MASTER Global Robotic Net