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Re: [APML] LUM with IR cutoff

To: astro-photo@seds.org
Subject: Re: [APML] LUM with IR cutoff
From: Sean Walker <swalker@SkyandTelescope.com>
Date: Tue, 06 Aug 2002 15:21:31 +0000
Organization: Sky Publishing Corp.
References: <3D4FF765.1080403@email.unc.edu> <002b01c23d7f$24a48d60$03d2abd8@oemcomputer>
Reply-To: astro-photo@seds.org
Sender: owner-astro-photo@seds.org

Tony- excellent Image!
those arcs are reflections of the bright star off of the surface of the
CCD bouncing back on to the optical window of the CCD chip. this happens
because the CCD surface isn't perfectly flat- really bright stars will
cast 8 secondary reflections in a radial pattern around the "true" star.

Sean Walker


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Follow-Ups:
- Re: [APML] LUM with IR cutoff
  - From: "Tony Hallas" <tonyhallas@foothill.net>

References:
- [APML] (OT) IC1396 CCD with Schmidt-like FOV
  - From: Joe Pedit <pedit@email.unc.edu>
- Re: [APML] LUM with IR cutoff
  - From: "Tony Hallas" <tonyhallas@foothill.net>

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