This directory includes the transmission curves of the Bessell filters. The *.dat files are ASCII files of the transmission in two columns: wavelength in nanometer and the transmission in %. The B, V, R, I filters were purchased in 1997 and the letter accompanying them is below. The U filter was purchased in 2007 from Omega Optical and its transmission curve that was delivered with it and is in U.jpg. The file U.txt was extracted from a file of a generic Bessell U filter found on the web and this is the curve that is in the transmission.eps file. The files transmission.agr and transmission.eps are plot of the transmission in the different bands. The files info.jpg include some information about the filters. The filters are 2x2 inches square and 5 mm thick. ----- Begin Included Message ----- >From optics@CustomScientific.com Fri May 2 02:12:43 1997 Received: from in1.doitnow.com (doitnow.com) by wise.tau.ac.il with SMTP id AA09565 (5.67b/IDA-1.5 for ); Fri, 2 May 1997 02:12:36 +0300 Return-Path: Received: from my-computer-1 (phx-ts3-0.doitnow.com [207.98.157.97]) by in1.doitnow.com (/8.7.3) with ESMTP id QAA05303 for ; Thu, 1 May 1997 16:08:05 -0700 (MST) Message-Id: <199705012308.QAA05303@in1.doitnow.com> From: "Custom Scientific, David Marcus" To: Subject: BVRI Filters Date: Thu, 1 May 1997 16:10:14 -0700 X-Msmail-Priority: Normal X-Priority: 3 X-Mailer: Microsoft Internet Mail 4.70.1155 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Status: R Dear Dan, Greetings and I hope you had a good Passover! Your filters and the cleaning kit are shipping today. Our instructions are to ship to the Burlington shipping depot at JFK airport in New York City. I presume that Burlington ships to Tel Aviv University from there. Spectrographs are included with the shipment and the spectral transmission data is being sent by separate e-mail. Thank you for your order. Please contact me if I can help you with anything else. Yours truly, David Marcus Custom Scientific 50 West Ocotillo Rd., Phoenix, Arizona 85013 USA Phone: 602-241-1668, Fax: 602-241-9919 optics@CustomScientific.com http://www.CustomScientific.com ----- End Included Message -----