<!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 Detectors</TITLE> <META NAME="description" CONTENT="CCD Detectors"> <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="node440.html"> <LINK REL="up" HREF="node440.html"> <LINK REL="next" HREF="node442.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html6944" HREF="node442.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html6941" HREF="node440.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html6937" HREF="node440.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html6943" 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="tex2html6945" HREF="node442.html">Introduction</A> <B> Up:</B> <A NAME="tex2html6942" HREF="node440.html">Detectors</A> <B> Previous:</B> <A NAME="tex2html6938" HREF="node440.html">Detectors</A> <BR> <BR> <!--End of Navigation Panel--> <H1><A NAME="SECTION002510000000000000000"> </A> <A NAME="ccd-detectors"> </A> <BR> CCD Detectors </H1> <P> The description of CCD reductions is divided into four parts. Section <A HREF="node442.html#introduction1">B.1.1</A> describes the ideas behind the relative calibration of 2-dimensional photometric CCD-images. <P> Section <A HREF="node444.html#reduction-steps">B.1.3</A> gives a description of the steps required to perform a relative calibration of the CCD and discusses the various MIDAS commands that are available to perform the required operations. Section <A HREF="node450.html#examples-and-hints">B.1.9</A> provides some examples of typical reduction scenarios. Section <A HREF="node453.html#ccd-commands-summary">B.1.10</A> is a summary of the relevant commands. <P> The procedures described in the manual will yield CCD-frames whose pixel values represent relative flux from one to the other. In order to proceed to calibrate the images in terms of magnitudes requires further steps not detailed here. <P> <BR><HR> <!--Table of Child-Links--> <A NAME="CHILD_LINKS"> </A> <UL> <LI><A NAME="tex2html6946" HREF="node442.html">Introduction</A> <LI><A NAME="tex2html6947" HREF="node443.html">Discussion</A> <LI><A NAME="tex2html6948" HREF="node444.html">Reduction Steps</A> <LI><A NAME="tex2html6949" HREF="node445.html">Removing Irrelevant Columns</A> <LI><A NAME="tex2html6950" HREF="node446.html">Bias Corrections</A> <LI><A NAME="tex2html6951" HREF="node447.html">Averaging and Merging Frames</A> <LI><A NAME="tex2html6952" HREF="node448.html">Cleaning Images</A> <LI><A NAME="tex2html6953" HREF="node449.html">Using the COMPUTE Command</A> <LI><A NAME="tex2html6954" HREF="node450.html">Examples and Hints</A> <UL> <LI><A NAME="tex2html6955" HREF="node451.html">The Simplest Case</A> <LI><A NAME="tex2html6956" HREF="node452.html">A Case with some Bad Columns</A> </UL> <LI><A NAME="tex2html6957" HREF="node453.html">CCD-Commands Summary</A> </UL> <!--End of Table of Child-Links--> <BR><HR> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>
