Paul,
Have you tried using the GSC or USNO A2 databases, I seem to recall that one
of the two goes down to at least mag 19. I would suspect it would be USNO
since it is 6 gig in size. If you have a high speed connection it still
takes forever to download, but once you have it on cd almost any program can
use it.
Cheers,
Dave
BTW, that is a pretty nice image.
-----Original Message-----
From: Paul LeFevre [mailto:lefevre@No-Spam]
Sent: Thursday, December 18, 2003 3:00 PM
To: The Astronomy Connection
Subject: [TAC] Interesting image, and some help?
A small group of us StarlightXpress CCD camera owners have been working on a
little project.
We're collaborating on really deep images of a few objects, taking hours and
hours each of the same object with varying equipment, and adding all the
efforts together to try and go REALLY deep and detailed.
Here's a quick first pass of IC 443 (Supernova Remnant in Gemini), our first
target. This is an inverted version, just because I liked how filamentary
the inverted version looked <grin>:
http://www.lefevre.darkhorizons.org/collab5ipl.jpg
This is a total of about 20 hours of H-alpha filtered exposures. Now I need
a little help...
My SkyMap Pro only goes to mag 14 in this area of the sky, and I'd like to
know how deep the image is going with regard to stars. Does anybody have a
good computer or paper chart that can go mag 20 and beyond, as I'm pretty
sure we're that deep? If you do, please let me know off-list (lefevre AT
midway DOT com).
The group is about to start on RGB data for the collaborative image, and I'm
going to add a little OIII luminance in as well. I'll certainly post when
it's done :)
Paul
http://lefevre.darkhorizons.org/ccdimaging/pdlccd.htm
