MASTER: optical transients

ATel #9609; O. Gress, P. Balanutsa, V. Shumkov, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), R. Rebolo, M. Serra Ricart (IAC), R. Podesta (OAFA), H. Levato (ICATE), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, V. Kornilov, T. Pogrosheva, V. Chazov, V. Vladimirov, D. Vlasenko (Lomonosov MSU), S. Potter (SAAO), C. Lopez, F. Podesta (Observatorio Astronomico Felix Aguilar), C. Saffe (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio)
on 10 Oct 2016; 08:59 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J143849.60-443724.5 discovery - dwarf nova outburst, Ampl>5.4m

MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 14h 38m 49.60s -44d 37m 24.5s on 2016-10-01.73438 UT with unfiltered m_OT=16.4m (mlim=19.7m).
The OT is seen in 8 images.
We have reference image without OT on 2016-03-31.06436 UT with unfiltered mlim=19.3m.
There is only GSC2.3.2 blue star (21.77 in 1976y), it means 22mag POSS limit and more then 5.4m current outburst's amplitude.
Spectral observations are required.
The discovery and reference images are http://master.sai.msu.ru/static/OT/143849.60-443724.5_1.png

MASTER OT J144632.31-414845.1 detection - OT with ampl>4.3m

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 14h 46m 32.31s -41d 48m 45.1s on 2016-10-02.73941 UT with unfiltered m_OT=17.7m (mlim=19.9m).
The OT is seen in 10 images. We have reference images without OT on 2016-09-11 18:44:22UT with mlim=19.4. There is m_OT=18.9 on 2016-07-09 16:45:48.636UT (but no POSS image!).
Spectral observations are required.
The discovery and reference images are http://master.sai.msu.ru/static/OT/144632.31-414845.1_2.png

MASTER OT J230153.13+021940.5 discovery - UVCet flare

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 23h 01m 53.13s +02d 19m 40.5s on 2016-10-07.00579 UT with unfiltered m_OT=18.7m (limit 20.2m).
The OT is seen in 3 images.
We have reference image without OT on 2016-08-02.05465 UT with unfilt.mlim=21.0m.
The discovery and reference images are http://master.sai.msu.ru/static/OT/230153.13021940.5.png

MASTER OT J012523.45+124151.5 discovery - new dwarf nova outburst, ampl>3.6m, no VIZIER

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 01h 25m 23.45s +12d 41m 51.5s on 2016-09-27.11354 UT with unfiltered m_OT=18.4m (mlim=20.0m).
The OT is seen in 3 images on 27 Sept (m_OT=18.4m), and on 2 images on 2016-10-08 03:18:28.605 with m_OT=18.8.
We have reference image without OT on 2015-09-17.10593 UT with unfiltered m_lim=20.9m, on 2016-10-08 03:18:28.605 with mlim=20.0
Spectral observations are required.
The discovery and reference images are http://master.sai.msu.ru/static/OT/012523.45124151.5.png

Young stellar objects:
MASTER OT J154652.97-411626.1 - MASTER-OAFA auto-detection system discovered OT source at (RA, Dec) = 15h 46m 52.97s -41d 16m 26.1s on 2016-10-07.99705 UT with unfiltered m_OT=13.6m (mlim=17.8m), 11 images, reference on 2016-07-10.00333 UT(mlim=18.6 with unfilt.m_OT=16.2m.

http://master.sai.msu.ru/static/OT/MASTEROTJ154652.97-411626.1.jpg

MASTER Global Robotic Net