<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998) originally by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>CCD photometry</TITLE> <META NAME="description" CONTENT="CCD photometry"> <META NAME="keywords" CONTENT="vol2"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <LINK REL="STYLESHEET" HREF="vol2.css"> <LINK REL="previous" HREF="node631.html"> <LINK REL="up" HREF="node628.html"> <LINK REL="next" HREF="node633.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html9397" HREF="node633.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html9394" HREF="node628.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html9390" HREF="node631.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html9396" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="icons.gif/contents_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html9398" HREF="node633.html">Observational data</A> <B> Up:</B> <A NAME="tex2html9395" HREF="node628.html">Sample instrument files</A> <B> Previous:</B> <A NAME="tex2html9391" HREF="node631.html">A modern two-channel photometer</A> <BR> <BR> <!--End of Navigation Panel--> <H3><A NAME="SECTION003257400000000000000"> CCD photometry</A> </H3> Our final example is an instrument-description file used for B and V magnitudes extracted from CCD frames. The CCD is a front-illuminated chip, run at 180 K. The filters are at ambient temperature, uncontrolled. Bands are identified by name in the file of extracted values. <P> The instrumental description is in Table <A HREF="node631.html#tbl:ccd-example">I.16</A>. Notice how this resembles the primitive UBV photometer in the first example. <P> <BR><HR> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>
