From jop at astro.columbia.edu  Mon Dec  1 20:43:07 2008
From: jop at astro.columbia.edu (Joe Patterson)
Date: Mon, 01 Dec 2008 20:43:07 -0500
Subject: (cba:news) Bond's outburst of the Lo 4 central star (LV Vel)
Message-ID: <493492AB.8000701@astro.columbia.edu>


Dear CBAers,

Well, here's a mighty tantalizing announcement in the morning
southern sky.  Can this star have outbursted to 14.5 or thereabouts?
If your sky is clear and you can see Vela in the morning sky,
swing your telescope over and let's find out!

joe

-------- Original Message --------
Subject: [vsnet-alert 10770]  Outburst of central star of Lo 4
Date: Mon, 01 Dec 2008 20:19:26 -0500
From: Howard E. Bond <bond at stsci.edu>
To: vsnet-alert at kusastro.kyoto-u.ac.jp, 
vsnet-outburst at kusastro.kyoto-u.ac.jp
References: <49333A25.8BCF0B6A at stsci.edu>

Dear colleagues:

As a follow-up to [vsnet-alert 10756], in which I announced a spectroscopic
outburst of the central star of the planetary nebula Lo 4 = LV Vel 
(J2000: 10 05
45.7 -44 21 32), I noticed that ASAS-3 has possibly detected a photometric
outburst of nearly 2 magnitudes on this star, at HJD 2454800.7946 = 2008 Nov
30.2946. The ASAS observation was made, fortuitously, less than one hour 
after
the spectrum was obtained.

See the ASAS light curve at:

http://www.astrouw.edu.pl/cgi-asas/asas_variable/100546-4421.5,asas3,0,0,1000,0

If real, such behavior of a nucleus of a planetary nebula is completely
unprecedented. Confirming photometric observations are urgently requested!

Calibrated B and V photometry of two nearby comparison stars is available in
Bond & Meakes, 1990, AJ, 100, 788.

Howard E. Bond
Space Telescope Science Institute




From jop at astro.columbia.edu  Mon Dec  8 10:02:58 2008
From: jop at astro.columbia.edu (Joe Patterson)
Date: Mon, 08 Dec 2008 10:02:58 -0500
Subject: (cba:news) [Fwd: ATel  1867]
Message-ID: <493D3722.1020307@astro.columbia.edu>

Dear CBAers,

Given the amplitude of this dwarf nova, it may very well be one of our 
favorites - in the WZ Sge class.  Andromeda is not very well positioned 
now... and the background galaxy might be pretty annoying... but see if 
you can get a time series on it, while it's still bright (if it is).
We can still solve for a unique period, if we get a USA-Europe baseline.
Here's the 2000 position:
00 42 26.50  +42 15 36.7
Sorry if it's a bad field.  Here in New York, I dunno!

joe

-------- Original Message --------
Subject: ATel  1867
Date: Mon,  8 Dec 2008 01:41:50 -0500 (EST)
From: atel at astronomerstelegram.org
To: jop at astro.columbia.edu

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The Astronomer's Telegram 
http://www.astronomerstelegram.org
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Posted: Sun Dec  7 01:30:01 EST 2008 -- Mon Dec  8 01:30:02 EST 2008
==============================================================================
ATEL #1867							     ATEL #1867

Title:		M31N2008-11b is a Galactic Dwarf Nova
Author:	M. M. Kasliwal, R. Quimby, S. R. Kulkarni (Caltech)
Queries:	mansi at astro.caltech.edu
Posted:	8 Dec 2008;  4:28  UT
Subjects:	Cataclysmic Variables, Novae, Transients, Variables

We observed M31N2008-11b <a 
href='http://www.cfa.harvard.edu/iau/CBAT_M31.html#2008-11b'>(K.
Itagaki, CBET#1588)</a> with the Double Beam Spectrograph on the Palomar
Hale 5-m telescope on UT Dec 4.221. This spectrum has a steep blue 
continuum,
very narrow emission in H-alpha and broad absorption in H-beta through
at least H-eta. Further, there is a faint blue counterpart in SDSS DR 
Supplement
g-band imaging (g=22.8, r > 23.3). Given the reported peak magnitude of
14.5 (CBET#1588), this outburst had an amplitude of >8 mag. We suggest
that this optical transient is an SU-UMa-like superoutburst in our own
galaxy similar to HS2219+1824 (Rodriguez-Gil et al 2005).

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Cataclysmic Variables, Globular Clusters, Gamma-Ray Bursts, Meteors, 
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Events, Neutron Stars, Novae, Planets, Planets (minor), Pulsars, Quasars,
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