Suspected variable stars in DS23 dataset. II.

Tom Droege
June 18, 2002

Here are a few stars I found while working on cloud elimination. So far when I eliminate clouds I also eliminate the interesting stars. A few more runs should tell me if the present method does any good. In any case here are a few stars (transcribed by hand so beware) that I am using to test good guys getting lost. They should all be in pretty good view. But what do I know, I never look at the sky 'cause I can't see much. There is no tass number because it is different with each run as I eliminate frames with the cloud detection.

RA		Dec. 		Vmag		Imag		Variation(mag)
213.9462	8.1367		10.42		9.64		0.2
240.0543	9.3849		10.12		9.64		0.3
245.0137	7.1247		9.24		8.92		0.3  includes minimum
265.2677	7.7846		11.21		10.68		0.3
272.3388	9.1512		9.02		8.31		0.7  much stuff
277.3044	6.7872		9.65		9.09		0.2  includes minimum

Hmmmm! Only six obvious stars from 24 frame sets. This is less than one a night of observation. Sigh!

One gets lots more in frames looking at the Milky Way. So that is where most searches have been. If there is anything lurking out in the unobserved void, we may find it.


John Greaves adds (June 18)

Tom Droege wrote:

> RA              Dec.            Vmag            Imag            Variation(mag)
> 213.9462        8.1367          10.42           9.64            0.2
 
Not known as a variable.

Bright xray source 1RXSJ141546.6+080755 of 11" position error lies at
17" (pos.err.for these can be twice+ internal value given).


> 240.0543        9.3849          10.12           9.64            0.3

Not known as a variable.


> 245.0137        7.1247          9.24            8.92            0.3  includes minimum

Not known as a variable.

Bright xray source 1RXSJ 1620003.6+070707 of 12" pos.err. at 21".


> 265.2677        7.7846          11.21           10.68           0.3

Eclipsing EB variable V506 Oph.


> 272.3388        9.1512          9.02            8.31            0.7  much stuff

Eclipsing EW variable V839 Oph.


> 277.3044        6.7872          9.65            9.09            0.2  includes minimum

Suspected variable NSV 10892, no hint of variability nature given. 
Bright xray source.
Hmmm, mentioned once before?  Near open cluster NGC 6633.



None checked in SIMBAD yet for bib refs.