(cba:news) [Fwd: Re: [baavss-alert] V358 Lyr]

Sat Nov 22 20:19:04 EST 2008

Whoa!  V358 Lyr in outburst, it seems.  Found by Jeremy Shears.  The 
image Arne attaches in this note is at quiescence - it's deep and will 
help you find the object.  It was verified by Shawn Dvorak, so I guess 
it's real.  This star hasn't erupted in decades, as far as anyone knows.
It might not be a super - but it's so rare, stay on it as long as 
possible. Likely in clear light, at that mag (16.3).

Another find for the borealites. Great season for us northerners.

joe

-------- Original Message --------
Subject: 	Re: [baavss-alert] V358 Lyr
Date: 	Sat, 22 Nov 2008 18:47:33 -0500
From: 	arne <arne at aavso.org>
Reply-To: 	baavss-alert at yahoogroups.com
To: 	baavss-alert at yahoogroups.com
References: 	<BLU126-W45A31BC9226D00413E5F44C40E0 at phx.gbl>

Jeremy Shears wrote:
  > V358 Lyr is possibly in outburst - confirmation urgently required. In
a single unfiltered CCD image obtained from the Bradford Robotic
Telescope this evening I made the following measurement:
  >
  > Nov 22.917 16.26C
  >
  > I reported this to Gary Poyner, who measured the same image as 16.21C
(both using the AAVSO chart).
  >
  > However, we note that the position is very slightly West of the
positon marked on the AAVSO chart, placing the suspect object half way
between the marked position for V358 and the 175 comp. Unfortunately we
only have a single BRT image and we cannot rule out a fault (doesn't
look like a hot pixel), hence we cannot be sure that it is defintely
V358 Lyr in outburst, thus the need for confirmation. Cloudy conditions
at both my location and Gary's are preventing our confirmation.
  >
I've placed a 4.5x4.5arcmin FOV extraction of a deep image from
the 1.0m telescope at NOFS of the V358 Lyr field at
http://www.aavso.org/tmp2/v358lyrv.jpg
<http://www.aavso.org/tmp2/v358lyrv.jpg>
This should help you in identifying the object. The VSX coordinates
and Downes coordinates are from the 2004 IBVS 5544 by Antipin et al.,
based on 2MASS coordinates. They indicate the coordinates are
accurate to about 0.5arcsec:
18:59:32.95 +42:24:12.2 J2000
The quiescent counterpart is at my plate limit. I notice that
the VSP chart has slightly different coordinates.
Arne

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