[vsnet-alert 14965] New bright CV in Perseus (13m)

[Denis Denisenko]

Hello all!

We have found new bright CV in outburst MASTER OT J042609.34+354144.8
(mag range 12.6-16.7) on the images from last night. I have just
obtained confirmation image from the same MASTER-Amur telescope, and
the star is still bright, at 13.0m.

MASTER OT J042609.34+354144.8
  20120930.633  12.65  MASTER-Amur
  20120930.664  12.89  MASTER-Amur
  20121001.680  13.00  MASTER-Amur

This variable is especially interesting because it belongs to the wide
common proper motion pair (another component is the red dwarf at
16.6"). PM is (16, -42) mas/yr.

The system is also a bright ROSAT X-ray source 1RXS J042608.9+354151
(flux 0.111+/-0.018 cnts/sec, hardness ratios HR1=1.00+/-0.05
HR2=0.38+/-0.14). This makes it almost a twin to another X-ray
selected dwarf nova DDE 8 = 1RXS J231935.0+364705 which has
HR1=1.00+/-0.09 HR2=0.47+/-0.16 which is a magnitude fainter.

The star is also an ultraviolet source GALEX J042609.3+354145 with
magnitudes FUV=17.70+/-0.05, NUV=17.52+/-0.03. SDSS has missed this
object by just 1.9', so no predictions of orbital period based on the
color data are possible.

More details are available in Astronomer's Telegram ATel 4441
<http://www.astronomerstelegram.org/?read=4441>. Here is a link to the
color-combined (BRIR) DSS finder chart:
http://master.sai.msu.ru/static/OT/J0426093+354145-BRIR.jpg (10'x10'
FOV). Naturally, photometric time series are encouraged!

Denis Denisenko

P.S. Actually I was going to announce the discovery of 16.5-mag CV in
Andromeda near another MASTER OT today, but that will now have to wait
with this exciting news!