Reposted from the AAVSO list.  The resources link has some good stuff. - Kurt =================== Date: Tue, 3 Feb 2009 15:01:48 -0800 From: "David Daiku Trowbridge" <David@tinyblue.com> Subject: [Aavso-photometry] CCD Observations of Epsilon Aurigae To: "AAVSO Photometry" <aavso-photometry@mira.aavso.org> Message-ID: <000b01c98653$65160800$2f421800$@com> Content-Type: text/plain;    charset="us-ascii" I've posted a document describing how I have used a 4" telescope with a 3-hole mask to do BVRI photometry of Epsilon Aurigae. Also, I've included examples of Excel spreadsheets that I've used to determine standard magnitudes following the methods of Bruce Gary and Priscilla Benson. Standard magnitudes for the comparison star Lambda Aurigae are from Jeff Hopkins. Transmission coefficients were measured using M67. http://www.tinyblue.com/htm/eps-aur.htm