[vsnet-alert 22756] MASTER OT J030504.43+433641.2 (ATEL)

[Taichi Kato]

MASTER OT J030504.43+433641.2 (ATEL)

IDs:
030504.373 +433640.85 (2000.0) Gaia_DR2_432550799241684480 plx=-(-) dismod=- pmra=-(-) pmdec=-(-) G=20.599 BP=20.304 RP=20.147
030504.378 +433640.63 (2000.0) GALEX_DR5_6372991643100909088 NUV=21.433(0.364) FUV=-(-)

===

ATEL #12232                                                          ATEL #12232

Title:  MASTER: high amplitude CV
Author: P. Balanutsa, V. Lipunov (Lomonosov MSU), A. Gabovich, V.
                Yurkov (BSPU), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, V. Vladi
mirov,
                V. Kornilov, D. Zimnukhov, D. Vlasenko (Lomonosov Moscow State U
niversity,
                SAI), R. Rebolo, M. Serra-Ricart (IAC), D. Buckley (SAAO), R. Po
desta,
                C. Lopez, F. Podesta, C. Francile (OAFA), H. Levato (ICATE, SJNU
),
                O. Gress, N. Budnev (API ISU), A. Tlatov, V. Senik (KSS), V. Shu
mkov,
                T. Pogrosheva 
Queries:        tiurina at sai.msu.ru
Posted: 20 Nov 2018; 19:46 UT
Subjects:Optical, Request for Observations, Cataclysmic Variable,
                Transient, Variables



MASTER OT J030504.43+433641.2 detection - ampl >5mag 

MASTER-Amur auto-detection system ( <A HREF="http://www.hindawi.com/journals/aa/
2010/349171/">Lipunov
et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L</A>
) 

discovered OT source at (RA, Dec) = 03h 05m 04.43s +43d 36m 41.2s on 2018-11-20.
54828
UT during routine MASTER automatic Fermi trigger 564334514 inspection (but
OT is not connected with this GRB).

The OT unfiltered magnitude is 
15.9m
(mlim=17.9m) at 2 inspect images. There is m_OT=15.8 on 2018-11-19 15:54:32.201
at MASTER-Kislovodsk 1 inspect image.

We have reference images without OT on 2014-10-01.54326 UT with unfiltered
magnitude limit 19.0m (MASTER-Amur), on 2018-10-18 23:13:57 with marginally
seen OT << mlim=19.8 (MASTER-Kislovodsk), on without OT on 2018-09-22 17:48:45UT

with mlim=18.7 (MASTER-Tunka). 

There is SDSS star ( <a href="http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=
&-out.add=_r&-out.add=_RAJ%2C_DEJ&-sort=_r&-to=&-out.max=20&-meta.ucd=2&-meta.fo
ot=1&-c=46.268458333333+43.611433333333&-c.rs=5">and
other</a>) with rmag=21.3 in history. 

MASTER unfiltered W=0.2B+0.8R, calibrated by USNO-B1 R2,B2/R1,B1.

It means more then 5mag of current outburst amplitude. 

Spectral observations are required.

The discovery and reference images are available at: 

http://master.sai.msu.ru/static/OT/030504.43433641.2.png 

<center><a href="http://observ.pereplet.ru/MASTER_OT.html">List of Optical
Transients discovered by MASTER</a></center>

MASTER Global Robotic Net: http://observ.pereplet.ru