[Aavso-photometry] Variable in the field of TY BOO

[Richard Huziak]

Hi Yenal,

If you search SIMBAD, you find the star is:

*2MASS J15004755+3509514 * -- Star
*at 15 00 47.6 +35 09 52

SIMBAD also references the star in IBVS 5700


Searching in *VSX* with a 15' radius search under TY Boo reveals the 
star is listed here:

http://www.aavso.org/vsx/index.php?view=detail.top&oid=144501

**under the USNO number. **The star should have plotted on your TY Boo 
chart if you have 'plot all variables' turned on.


It is an RRab star, period 0.348836d, range 14.8 - ? R mag discovered in 
2004. (You can see the RRab character from your curve - slow decline, 
bottom flat then a quick rise toward max.  Too bad you couldn't have run 
another hour - looks like you would have seen the maximum.

Whether or not the data is entered into the AAVSO database, you can 
always improve the data in VSX by providing a complete range for the 
star, and maybe improving the period.  There is also another nearby 
variable that you can be taking data on.



rick



*

Yenal Ogmen wrote:
> Hi all,
> Last night, while observing minima of TY Boo, I realized that one of the field stars is varying. I checked VSP and saw that it is labeled as USNO-A2.0 1200-07442272. You can check the link below to see LC of the field. At the top, is LC of secondary and then primary minima of TY Boo and at the below you can see u shaped LC of the related star. What I want to ask is, where can I find info about this star? I want to know about its nature. Is it EB or what? 
>
> http://www.lookatcyprus.com/astronomy/yenalogmen/tyboo.jpg
>
> Arne, do you think that I should enter its photometry to the database?
>
> Thank you.
>
>  
> Yenal Ögmen
> Green Island Observatory (B34)
> www.greenislandobservatory.com
> Geçitkale
> North Cyprus
>
>
>       
> _______________________________________________
>
> Aavso-photometry mailing list
> Aavso-photometry at mira.aavso.org
> To change options or unsubscribe, goto http://www.aavso.org/mailman/listinfo/aavso-photometry
>
> The Santa Barbara Instrument Group (www.sbig.com): Proud Sponsor of the American Assocation of Variable Star Observers.
>   

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