Path: utzoo!attcan!uunet!ncrlnk!ncrcce!johnson
From: johnson@ncrcce.StPaul.NCR.COM (Wayne D. T. Johnson)
Newsgroups: sci.space.shuttle
Subject: Re: Hubble Space Telescope
Message-ID: <1405@ncrcce.StPaul.NCR.COM>
Date: 26 Jul 89 16:34:10 GMT
References: <2217@ccncsu.ColoState.EDU> <1136@noao.UUCP>
Reply-To: johnson@ncrcce.StPaul.NCR.COM (Wayne D. T. Johnson)
Organization: NCR Comten, Inc.
Lines: 10

In article <1136@noao.UUCP> groves@noao.edu (Lee Groves) writes:
>Believe it or not, I have seen a chip with  < 10 photon per ADU sensitivity!
>(ADU = Analog to Digital Unit.)
>
But how do you mesure < 10 photons?
-- 
Wayne Johnson                 (Voice) 612-638-7665
NCR Comten, Inc.             (E-MAIL) W.Johnson@StPaul.NCR.COM or
Roseville MN 55113                    johnson@c10sd1.StPaul.NCR.COM
These opinions (or spelling) do not necessarily reflect those of NCR Comten.