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MASTER Net: optical transients

ATel #9592; O. Gress, V. Shumkov, T. Pogrosheva, S. Shurpakov, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), R. Rebolo Lopez, M. Serra Ricart (IAC), R. Podesta (OAFA), H. O.Levato (ICATE), E. Gorbovskoy, N. Tiurina, P. Balanutsa, A. Kuznetsov, V. Chazov, V. Kornilov, K. Ivanov, V. Vladimirov (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 4 Oct 2016; 02:13 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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

MASTER OT J143849.60-443724.5 discovery - possible dwarf nova outburst, Ampl>5.6m

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 star with known blue jmag=21.77, it means more then 5.6m of current outburst
The discovery and reference images are http://master.sai.msu.ru/static/OT/143849.60-443724.5.png

MASTER OT J040121.35-533740.0 detection - poss.dwarf nova outburst, ampl>2.1
MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 04h 01m 21.35s -53d 37m 40.0s on 2016-09-28.89198 UT with unfiltered m_OT=19.9m (mlim=21.4m).
The OT is seen in 6 images.
We have reference image without OT on 2015-02-14.89772 UT with unfiltered mlim=21.2m. There is USNO-B1 star with B2=21.61,R2=23.31 => ampl>2.1m
The discovery and reference images are http://master.sai.msu.ru/static/OT/040121.35-533740.0.png

MASTER OT J034525.01+315742.7 detection
MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 03h 45m 25.01s +31d 57m 42.7s on 2016-10-02.25000 UT with unfiltered m_OT=16.4m (limit 19.9m).
The OT is seen in 4 images.
We have reference image without OT on 2016-01-01.83041UT with unfiltered mlim=20.5m.
The discovery and reference images are http://master.sai.msu.ru/static/OT/034525.01315742.7.png

MASTER OT J144632.31-414845.1 detection - OT
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 image with m_OT<~19.9 on 2016-03-04 02:10:52 UT with unfiltered mlim=19.9m.
The discovery and reference images are http://master.sai.msu.ru/static/OT/144632.31-414845.1_1.png

Young Stellar Objects candidates:
MASTER OT J152200.68-555539.2 - MASTER-OAFA auto-detection system detected OT source at (RA, Dec) = 15h 22m 00.68s -55d 55m 39.2s on 2016-10-03.07322 UT with unfiltered m_OT=17.5m (mlim=19.2m), 4 images, reference image without OT on 2016-07-11.057UT, images are http://master.sai.msu.ru/static/OT/MASTER152200.68-555539.2.jpg
MASTER OT J153156.56-544004.1 - MASTER-SAAO auto-detection system detected OT source at (RA, Dec) = 15h 31m 56.56s -54d 40m 04.1s on 2016-09-30.77237 UT with unfiltered m_OT=18.4m (mlim=20.1m), 9 images, reference image without OT on 2016-03-31.92017 UT with unfilt.mlim=20.4m, images are http://master.sai.msu.ru/static/OT/153156.56-544004.1.png
MASTER OT J155252.74-622232.4 - MASTER-SAAO auto-detection system detected OT source at (RA, Dec) = 15h 52m 52.74s -62d 22m 32.4s on 2016-09-30.83672 UT with unfilt. m_OT=14.2m (mlim=18.7m), 16 images, reference image without OT on 2015-01-07.09073 UT with unfilt.mlim=17.9m, images are http://master.sai.msu.ru/static/OT/155252.74-622232.4.png

Spectral observations are required for every OT

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net