(cba:news) Fwd: Re: (cba:chat) CR Boo faint

[Joe Patterson]

Hi CBAers,

CR Boo at 16.7 is a RARE opportunity, and it's available to both 
hemispheres for lengthy observation. It's an urgent priority now.  
There's not much historical evidence about the duration of these low 
states - maybe only a few days.  It's a get-thee-to-a-telescope moment.  
The main periodicity is near 25 minutes, so you don't have any special 
constraints about integration time.

joe p




-------- Forwarded Message --------
Subject: 	Re: (cba:chat) CR Boo faint
Date: 	Thu, 22 Mar 2018 02:00:43 -0400
From: 	Shawn Dvorak <sdvorak at rollinghillsobs.org>
Reply-To: 	cba-chat at cbastro.org
To: 	cba-chat at cbastro.org



I'm not sure if CR Boo is still an object of interest, but it's
currently in a low state. I just measured it (05:45 UT) at v=16.7. I'm
going to go ahead and follow it until it gets too late, so I should be
about 4.5 hours of data.

Shawn


On 05/30/2017 12:40 PM, Joe Patterson wrote:
> 16.0 isn't quite DefCon 5, but it's at least DefCon 3.  I've only 
> personally seen it once that faint in a few hundred hours of observing,
> and I only had a spectrograph on the telescope that night.  Good (at 
> least) target for all known hemispheres.
>
> And for spectroscopy too, if those people are reading.
>
> joe p
>
> On 5/30/2017 9:42 AM, Joe Ulowetz wrote:
>> Last night CR Boo was around mag 16.0.  It isn't quite to the mag 17 
>> level that Joe P. said constituted an alert for this star, but it is 
>> fainter than the mag 14-15 that I usually see it at.
>>
>> It seemed to be brightening slightly toward the end of the night.
>>
>> Joe U.
>>
>>
>> Inline image 1
>>
>>
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