[vsnet-alert 4812] MuniDOS repaierd / Virtual observatory up!

[Rudolf Novak <rudolfn@physics.muni.cz>]

Dear colleagues,

we have some good news for those who use MuniDOS (DOS/Windows part of
CCD photometry package called MuniPack) for their reductions

Maybe some of you know about the bug in FITS conversion, that too bright
stars (brighter than Word/2 ~32000 counts) are converted to 0 intensity.
We did today bug fix on this and right now we test it.

This fault was also reason for troubles using flat-fields with intensity
more than 32000 (often case). New conversion program wrote by Filip,
tested under Linux and also compiled and tested for DOS is done. The
update (in microsoft's term "service pack" :))) will be available at the
web-site in a few days. 

It will be also a date when you would be able to download also Windows
NT version of MuniDOS which will be available (just made some changes
due to different DOS/Win95 and NT OS strategy). 

Right now I'm trying to prepare completely new WINDOWS distribution
(advanced but also free of charge) with command-line based system of
photometry (stability, stability,...) and mainly with more precise
differential photometry methods. Probalby first statistical search for
variables in long runs.

[[[
It is based on the fact that the brightness of star have distribution
seems like normal (not tested yet in fact) with mean value and
uncertainyty sigma. Stars which brightness is changing during night
(eclipses, humps,...) have very different sigma than stars with same
brightness and constant brightness. The tendecny f(mean magnitude,sigma)
is exponential (logarithmic) for magnitude distribution so if the
distance from the fitted curve will be larger than normal scatter than
it is possible that the star is variable. I made some preliminary test
on this with known variable stars and I got quite good results. Of
course, the algorithm should be more robust and everyone who would like
to help me to build it is welcome.
]]]

have a nice day and stay tuned. If you want to be informed about
MuniPack updates, register. It's free and will bring you news. Right now
we have couple of tenths of registered users :)

Rudolf Novak
N. Copernicus Observatory Brno
CR

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