From jop at astro.columbia.edu  Wed Nov  5 23:12:33 2008
From: jop at astro.columbia.edu (Joe Patterson)
Date: Wed, 05 Nov 2008 23:12:33 -0500
Subject: (cba:news) (cba:chat) V1251 Cyg - mag 18
In-Reply-To: <491265B4.70908@tularosa.net>
References: <491265B4.70908@tularosa.net>
Message-ID: <49126EB1.9060100@astro.columbia.edu>

OK gang, I think that rings the curtain down on V1251 Cyg.  The outburst 
might well show echoes, but in my judgment we won't learn more from 
them.  Tracking the fading outburst is plenty important, but others will 
do it.  Not worth the struggles with eighteenth magnitude, plus the
possible echo light which really confuses the periodic signal (in my 
experience).

KP Cas abd UW Tri are very likely still rewarding with fine light 
curves.  And I strongly recommend OT0238+35, another flashy new 
superhumper announced today by Maehara.
That's OT_J023839.1+355648.  I'm sorry I don't know more about this 
object; I drew a blank on it.  Maybe some of you can dig up some useful 
info, which I managed to miss.

And it's a fine season for V455 And, for which we continue to seek fast 
photometry (15 s, and preferably even a little faster  if you can cope 
with it).

Sorry for everything so northern.  I'll try to correct!

joe


Tom Krajci wrote:
> I started a run on V1251 Cyg tonight, and it's very faint.  I had to 
> stack multiple 120-second images to get a rough estimate that it's near 
> magnitude 18.
> 
> I really can't do time series on such a faint target.  I'll take data 
> tonight...in the hopes that there might be a rebrightening, but other 
> than that...I really can't provide much other data.
> 
> Tom Krajci
> 



From jop at astro.columbia.edu  Wed Nov 12 12:02:34 2008
From: jop at astro.columbia.edu (Joe Patterson)
Date: Wed, 12 Nov 2008 12:02:34 -0500
Subject: (cba:news) V632 Cygni
Message-ID: <491B0C2A.2080208@astro.columbia.edu>

Dear CBAers,

Full report tonight.  In the meantime, let's try hard to track V632 Cyg 
around the globe.  Tom Krajci found the superhumps, and if we can 
squeeze out some off-longitude light curves (probably Europe, I 
imagine), we can probably solve the nightly alias problem.  Around 14th 
mag and (super)humping away.  Just 0.15 mag full amplitude, not quite as 
bullish as some of the recent guys.  Then we need about five days of 
coverage to get a decently tight error bar on P(superhump).

Even though it's obscure star, it has a known Porb - and that makes it 
important, because the offset (Psh-Porb) is a measure of the disk's 
precession rate, which in turn tells us the mass ratio.

joe


From jop at astro.columbia.edu  Sat Nov 22 20:19:04 2008
From: jop at astro.columbia.edu (Joe Patterson)
Date: Sat, 22 Nov 2008 20:19:04 -0500
Subject: (cba:news) [Fwd: Re: [baavss-alert] V358 Lyr]
Message-ID: <4928AF88.9060102@astro.columbia.edu>

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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From jop at astro.columbia.edu  Sat Nov 22 20:20:02 2008
From: jop at astro.columbia.edu (Joe Patterson)
Date: Sat, 22 Nov 2008 20:20:02 -0500
Subject: (cba:news) [Fwd: [vsnet-outburst 9719] V358 Lyr - Cloudcroft
	confirmation]
Message-ID: <4928AFC2.8000801@astro.columbia.edu>

And here's Tom's confirmation.  Whew.

-------- Original Message --------
Subject: 	[vsnet-outburst 9719] V358 Lyr - Cloudcroft confirmation
Date: 	Sat, 22 Nov 2008 18:12:45 -0700
From: 	Tom Krajci <tom_krajci at tularosa.net>
To: 	cvnet-outburst at yahoogroups.com
CC: 	Aavso-Photometry <aavso-photometry at mira.aavso.org>, chat CBA
<cba-chat at cbastro.org>, vsnet-outburst
<vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp>
References: 	<BLU126-W45A31BC9226D00413E5F44C40E0 at phx.gbl>
<49289ACC.7090203 at rollinghillsobs.org>



Weather is good enough...for now.

I see the same thing that Shawn sees at the coord's Arne passed on:
18:59:32.95 +42:24:12.2 J2000

Using GSC 3127-1780 (approx mag 13.2)....  V358 Lyr is mag 16.0
unfiltered.  I can continue unfiltered time series for another three
hours (too low)...or cirrus clouds cut me off.

I'm also running a BVRI repeated sequence on the other scope.

-- 
-------------------------------------------
Tom Krajci
Cloudcroft, New Mexico
http://picasaweb.google.com/tom.krajci

Center for Backyard Astrophysics (CBA)
https://cbastro.org/ CBA New Mexico

American Association of Variable Star
Observers (AAVSO): KTC http://www.aavso.org/
-------------------------------------------


Shawn Dvorak wrote:
> I just took an unfiltered image of the field and believe that V358 Lyr 
> is in outburst.  I don't have any previous images to compare against but 
> using the Downes online catalog it appears that there's an object at the 
> correct location.  Using the 14.0 mag star from the AAVSO sequence I 
> measure the star at:
>
> Nov 22.98 16.14CV
>
> The FITS file is available at 
> http://www.rollinghillsobs.org/v358lyr-001c.fit for inspection.
>
> Shawn Dvorak
> Clermont, FL USA
>
> 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.
>>
>> Jeremy Shears
>> Cheshire, UK.
>> __________________________________________________________
>> BigSnapSearch.com - 24 prizes a day, every day - Search Now!
>> http://clk.atdmt.com/UKM/go/117442309/direct/01/ 
>> <http://clk.atdmt.com/UKM/go/117442309/direct/01/>
>>
>> [Non-text portions of this message have been removed]
>>
>>  
>>