Re: TASS Mark IV data for MisV1336, MisV1339

["Thomas F. Droege" <droege@fastmail.fm>]

Michael,

You beat me to it!  Do your lists include the 2005 data?  If not I will
look it up.

Tom Droege

On Mon, 2 Jan 2006 11:36:28 -0500, "Michael Richmond"
<richmond@stupendous.cis.rit.edu> said:
> 
>   I used the TASS Mark IV database site to look up measurements of
> these two stars recently found to be variable by the MISAO project.
> They are 
> 
> MisV1336
>   R.A.   02h17m09s.27
>   Decl.  +56o08'33".0  (2000.0)
> 
> MisV1339
>   R.A.   03h04m34s.90
>   Decl.  +57o09'35".0  (2000.0)
> 
>   In each case, I plotted both the Mark IV measurements directly
> from the engineering database, and also the results of ensemble
> photometry in a region around the variable.  In the plots mentioned
> below, the engineering data is called "V-band" or "I-band,"
> while the ensemble photometry is called "patch V" and "patch I."
> 
>  
>   The first star, MisV1336, has a close companion about 0.1 arcmin
> to the South.  The Mark IV cameras would blend the light from these
> two stars together and call it a single object, so one would expect
> any variation in the star to be diluted.  The Mark IV data shows
> no significant variation in either V or I; that is,
> the scatter from the mean magnitude in both V and I was similar to
> the typical uncertainty in measurements for stars similar in brightness
> to MisV1336.  Here is a graph showing the light curve:
> 
>      http://spiff.rit.edu/richmond/temp/tass_misv1336.gif
> 
> The output of the ensemble photometry is at
> 
>      http://spiff.rit.edu/richmond/temp/tass_misv1336_i.dat
>      http://spiff.rit.edu/richmond/temp/tass_misv1336_v.dat
> 
> The mean color of this star is (V-I) = 0.52.
> 
> 
>   The second star, MisV1339, is not blended with any other
> star of similar brightness.  Its light curve shows one feature
> in the I-band which may be real, but otherwise no obvious variations:
> 
>      http://spiff.rit.edu/richmond/temp/tass_misv1339.gif
> 
> The output of the ensemble photometry is at
> 
>      http://spiff.rit.edu/richmond/temp/tass_misv1339_i.dat
>      http://spiff.rit.edu/richmond/temp/tass_misv1339_v.dat
> 
> The scatter from the mean for this star is again similar to that
> of neighboring stars of similar brightness.  
> The mean color of this star is (V-I) = 0.79.
> 
> 
>                                            Michael Richmond
> 
> 
> 
> 
-- 
  Thomas F. Droege
  droege@fastmail.fm