Re: Reprocessing Production

[Tass Mailing List <tass@mail.alembic.net>]

Date: Mon, 17 Sep 2007 11:43:03 -0700 (PDT)
From: James Fisher <jhfisher@ameritech.net>
To: Tass Mailing List <tass@mail.alembic.net>
Subject: Re: Reprocessing Production

Tom,

Give me a call when you can't get up in the observatory at xxx-xxxx, remember, I am only a couple of miles from your house, I can usuall get out with pretty short notice, especially if it is after 8:30-9:00 in the evening..up till 12:00 or so usually.

I can certainly help with some things you need.

Jim Fisher


----- Original Message ----
From: Tass Mailing List <tass@mail.alembic.net>
Sent: Saturday, September 15, 2007 6:43:00 PM
Subject: Reprocessing Production


Date: Sat, 15 Sep 2007 13:55:20 -0500
From: Thomas F. Droege <droege@fastmail.fm>
To: tass@tass-survey.org
Subject: Reprocessing Production

With a lot of help from Michael Richmond, I now have two computers
reprocessing the data.  Looks like one computer can process 4 nights
from one telescope a day.  13 nights from tom2 completed so far.  There
are more than 100 and less than a thousand telescope nights to process.
With luck I should finish in a month or so.  Only one disk unreadable
so far.  Unfortunately, I have lost about 6 months of data when I
could not make it up to the roof to write archive disks.  Sigh!

We have learned a few things that I am particularly interested in
studying.  When Michael was last here there was an interesting star.
tass had 40 or so measurements that were just junk.  This is because the
star was in a crowded field and suffered from variable contamination
from nearby stars.  I want to look at less crowded fields and see if
their statistics are different.  I have always looked an mixed samples.

With 7.5 second pixels, there should be contamination.  It is a question
of how one runs a survey.  With 100 mm optics, one has a difficult time
covering the sky if the focal length is adjusted for little
contamination.  I thought a lot about this in the very early days of
tass and decided that I wanted to run the whole sky.  This means we lose
the crowded areas.  Most observers use long focal lengths and look
where there are lots of stars.  tass should have the rare advantage of
looking at those parts of the sky that are seldom measured repeatedly.
Possibly now that I understand this we can find some interesting things.
We shall see.

Tom Droege

-- 
  Thomas F. Droege
  droege@fastmail.fm