Re: photometric study in IR of stars in Chamaeleon

[Tom Droege <tdroege2@earthlink.net>]

I read this paper with some interest.  Their RMS vs Magnitude diagrams are 
quite similar to the data that I have been looking at from the engineering 
run.  They seem to have a similar floor around 0.015 mag.  I am encouraged 
that we have a lot of data of similar quality to a published paper in a 
distinguished journal.  I can't wait to get on with it.  I think the next 
round from Michael will do the trick for the engineering run.  Of course we 
will find bugs from time to time, and I will probably have to reprocess a 
lot of data after I have a first go at it, but it is time to get on with it.

I estimate that I have 200 v and i measurements of 200000 stars which is a 
somewhat larger data set.  Roughly the same magnitude range.

Tom Droege

At 12:27 PM 4/28/02 -0400, you wrote:

>   A paper in the latest astro-ph analyzes infrared photometry
>in three passbands, JHK, of stars in the nearby Chamaeleon I
>molecular cloud.  The authors study about 35,000 stars over
>a period of 4 months, but they have typically 20-50 measurements
>per star.  I think that their work is not unlike some TASS
>studies, past and future.
>
>   Check it out at
>
>       http://xxx.lanl.gov/abs/astro-ph/0204430
>
>                                               Michael Richmond