(cba:news) new stars...

Joe Patterson jop at astro.columbia.edu
Wed Feb 4 13:43:34 EST 2004

Dear CBAers,

A new eruptive star just popped off in Libra (I think it's in Libra).
Details below.  The seasonal timing is very poor, but because it's
equatorial, we might well be able to piece together individual runs for a
pretty good study - and in particular, a decent period determination.
It's very likely to be a new dwarf nova.  New to humans, anyway.

So find a nice friendly comp star and fire away during those last few
hours of the night!

YY Dra has come down off its eruption, and lost its spot on the CBA menu.
I still hope for FS Aur coverage, even though it's poorly placed too; the
periodic behavior during the most recent data was pretty odd, and I hope
we can figger it out before the season ends (which is soon).  SDSS 0809+38
remains of high interest, though we haven't managed to get long runs.

Finally, it's T Pyx season again.  Individual time series of T Pyx don't
show much, but the splice shows the periodic wave that it is apparently
the signature of its orbital period.  Which is changing very rapidly.
Time for one more season of coverage, then we go to press over it.


---------- Forwarded message ----------
Date: Thu, 5 Feb 2004 00:33:55 +0900 (JST)
From: Hitoshi YAMAOKA <yamaoka at rc.kyushu-u.ac.jp>
To: vsnet-alert at kusastro.kyoto-u.ac.jp
Subject: [vsnet-alert 7983] Re: ASAS 153616-0839.1 eruption

>ASAS-3 alert system has detected Delta V > 4 mag
>outburst (dwarf nova?) of the star
>ASAS 153616-0839.1 (15:36:16 -08:39:06, Eqnx 2000),
>which is coincident with the V>16 object on the DSS image.

  It seem to be coincident with this star:
USNO-A2.0  15:36:15.871 -08:39:04.17  bmag=17.1 rmag=17.5
GSC-2.2    15:36:15.922 -08:39:06.49  bmag=18.83
USNO-B1.0  15:36:16.00  -08:39:07.6   pmRA=48mas/yr pmDE=-72mas/yr
                                  r1=17.70 b2=18.26 r2=18.69 i=18.89

  The proper motion suggests that it is a somewhat neighbouring
object (that of WZ Sge (7.0-15.5B) is 102 mas/yr).

Best Wishes,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka at rc.kyushu-u.ac.jp

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