Re: Tass-Landolt Comparison

[Michael Sallman <msallman@pro-ns.net>]

If I had looked a little further in the email, I would have noticed
Michael R.'s mention of Tech note 97.
http://www.tass-survey.org/tass/technotes/tn0097.html
In which he has information and plots of, wait for it....
Landolt - TASS comparisons.
Good thing mine look to be nearly identical to his.
And we now have a few more stars.

As they say, "Great Michaels think alike"
:-)

Mike

Michael Sallman wrote:
> I was cleaning out some of my old mail the other day, and I ran across a
> thread from last November, where Tom and Michael R. had looked at MarkIV
> data for 4 or 5 Landolt stars.
> I decided to see what I could find in the database, now that Tom has
> pretty much completed a full sweep of the northern sky.
> I downloaded the Landolt list from
> http://www.tass-survey.org/tass/catalogs/catalogs.html#landolt
> and matched it to stars in the database. I came up
> with 806 matches.
>  From this list, I took a look at those that had at least 10 good
> measurements in the database, and had V-R and R-I measurements in the
> Landolt list. This reduced the number to 306 stars.
> I have made some plots of the data (Landolt V vs. TASS V, etc.)
> and put them on my website:
> http://sallman.tass-survey.org/servlet/markiv/template/Landolt.vm
> The g(x) lines are simple linear approximations of the data.
> 
> It looks like the TASS I values are almost always fainter than the 
> Landolt I.
> 
> If anyone would like the data, just let me know.
> 
> Mike
> 
> P.S. I have finished loading the November and December data into the
> database.
> 
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