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MASTER: possible FUor detection and dwarf nova discovery

ATel #7538; N. Tiurina, V. Lipunov, N. Samus, P. Balanutsa, E. Gorbovskoy, S. Antipin (Lomonosov MSU), D. Buckley (SAAO), V. Kornilov, V. Chazov, A. Kuznetsov, V. Vladimirov, E. Popova (Lomonosov Moscow State University), S. Potter, A. Kniazev, M. Kotze (The South African Astronomical Observatory), N. Budnev, K. Ivanov, O. Gress, S. Yazev, 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), Yu. Sergienko, V. Yurkov, A. Gabovich (Blagoveschensk State Educational University), V. Shumkov, S. Shurpakov (MASTER-Team)
on 20 May 2015; 10:32 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables, Young Stellar Object

Referred to by ATel #: 7549

MASTER OT J005559.13+594802.1 detection - possible FUor or Novalike (NL|NC)

MASTER-Kislovodsk auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 00h 55m 59.13s +59d 48m 02.1s on 2015-05-19.92218 UT. The OT unfiltered magnitude is 16.6m (the limit is 18.4m).

This OT is seen in 5 images on 2015-05-19.922:19.232, and on 2014-08-24.728, 2014-03-31.804, 2013-06-18 2013-09-29.525, 2013-06-18.754, 2013-04-03.592 with the same m_OT.
There is no object at the position on the POSS I and POSS II images, but there is red source (ALLWISE, etc) with W2=15.25.
Thus we can suggest a possible FUor (but there is no visible surrounding nebula) or Novalike type of object (NL|NC by GCVS)

Spectral observations are required.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ005359.13+594803.1.jpg

MASTER OT J111124.17-455646.1 discovery - new Dwarf Nova outburst, Ampl>2.8

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 11h 11m 24.17s -45d 56m 46.1s on 2015-05-17.84691 UT.
The OT unfiltered magnitude is 16.7m (the limit is 19.5m).
The OT is seen in 4 images. There is no minor planet at this place.

We have reference image without OT on 2015-02-15.01821 UT with 20.3 unfiltered magnitude limit.

Spectral observations are required.

The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/111124.17-455646.1.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net