More Variables

[Tom Droege <tdroege2@earthlink.net>]

Just for fun I have gone through the current WS file and picked out those 
between 50 and 100 for the statistic.  The current list contains 3 million 
measurement of 600,000 stars taken in the mode where the star is always 
measured in the sam spot in the image.

This is just for fun, folks, so do with the data what you will.  I think I 
have 100 with the WS statistic over 100.  Another couple of hundred over 
25.  Most of these look variable when you look at a plot.  Just paging 
through the data, other stars near these on the list do not look so variable.

For the stars below, I tried to pick out the longer period variables.  This 
is just the first 10 that I found on the WS 50-100 list that looked like 
they were really long period and not some alias of a shorter period.  This 
is one measurement a clear day data, so sometimes there are many days 
between points.  Most of these have 7 to 14 data points.

There is no guarantee that I have not been bit by aliasing.   There were 
far more stars that looked like eclipsing binaries and other short period 
objects than looked like long period stars.  I somehow expected it to be 
the other way around.  I really don't have enough data yet.  It is 
encouraging to find a couple of known variables on this list.  I notice 3 
of of these stars were published before by someone called Richmond at some 
place called tass.

I tried to look all of them up in Vizier, but I am less than an expert at 
this.

The variation below is the V mag variation observed in the data.  The V 
Mag. is a mean value.  Sorry in advance if I make a typo.  Eventually I 
will automate the process.  But really I will leave this up to one of you 
and will concentrate on taking the data.  Youall can have the analysis fun.

RA		Dec		Variation	V Mag. 		Comment
72.5796	9.3916		
88.2707	13.1170	0.2		11.4
91.5623	13.9046	0.7		11.5		tass Mark III Richmond
101.9376	1.3717		0.3		9.1		tass Mark III Richmond
102.7177	-1.4294		0.6		11		TX Mon
109.1269	3.4760		0.4		10.7
110.3632	6.2743		0.9		12.4		Could be blend ????
116.9394	9.6885		1.2		12
118.7544	0.3936		0.6		11.3		SDSS Henden, tass Richmond
123.3777	13.8015	1.1		11.4

When I get Michael R's improved software, I will process this data 
again.  Then I will send it to Michael S. so that you all can get at the 
data points.

I could put out a list of hundreds, and I bet that 95% would be real 
variables.

Tom Droege