[Aavso-photometry] New variable discovered?

[Richard Huziak]

Hi Dave!

Nothing at that location on VSX, so a new var for Dan :-)  To me it 
seems that if you caught change in 2 of 4 nights and it was dim on the 
other two, that you very likey have a new RR Lyr star.  RR's spend most 
of their time 'fainter' because they are fading 90% of the time, and 
quick re-detection generally means short period.  RR's have periods of 
1/2 day-ish.   Other options less likely are an EB or EA.

I'll jump on it if it clears this weekend.

rick


Dave Lane wrote:
> Hi,
>
> A few nights ago, quite by accident when inspecting the light curve of 
> an asteroid, a new variable was discovered by my colleague Dan Majaess. 
> This variable is not subtle, but over the course of a bit more than 3 
> hours, it dropped in brightness (unfiltered) by nearly 0.8 magnitudes!
>
> See: http://www.davelane.ca/aro/newvar2.gif (3 other check stars are 
> also shown - SD is about 0.025)
>
> In the next four nights it was "stable" at about V=16, except for the 
> last observation last night when it jumped up about 0.4 mag! I have 
> looked carefully at the 5 frames which are combined to make a single 
> measurement and all individual 60-second frames indicate the same level 
> of brightening.
>
> See: http://www.davelane.ca/aro/newvar1.gif
>
> Has anyone seen this sort of behavior before? I'm fairly new at this, so 
> any idea what type of star this might be and what my next steps should 
> be (other than MORE DATA!)?
>
> Of course, it will be cloudy here for the next several days? Anybody got 
> an automated scope that wouldn't mind adding this field to their late 
> night observation list (in V). Transit is about 130am local.
>
> Cheers,
>
> Dave Lane LDJ
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>   

-- 
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Richard Huziak
Manufacturing Engineering
SED Systems
Saskatoon, SK, Canada
tel. (306) 933-1676
<huziak at SEDSystems.ca>
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