<!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>The Association Table</TITLE> <META NAME="description" CONTENT="The Association Table"> <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="node39.html"> <LINK REL="up" HREF="node37.html"> <LINK REL="next" HREF="node41.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html1948" HREF="node41.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html1945" HREF="node37.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html1941" HREF="node39.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html1947" 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="tex2html1949" HREF="node41.html">Basic Reduction Steps</A> <B> Up:</B> <A NAME="tex2html1946" HREF="node37.html">Setting up the Reduction</A> <B> Previous:</B> <A NAME="tex2html1942" HREF="node39.html">Data Retrieval and Organization</A> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION00663000000000000000"> </A> <A NAME="ccd:ccd-association-table"> </A> <BR> The Association Table </H2> The second step is to inspect the data, to define a set of criteria to select the science frames and their associated calibration frames, and to use the MIDAS Data Organizer to do the selection and to create the Association Table. Typically, the Association Table looks as displayed in Table <A HREF="node40.html#ccd:association-table">3.1</A>. Depending on available exposure types and on the selection, like for the bias exposure additional columns for darks and flats can be present in the table. The ... represent the three dimensional character of the Association Table, where in this case, the single bias frames are stored in the third dimension of column <TT>BIAS</TT>. <P> <BR> <DIV ALIGN="CENTER"><A NAME="1681"> </A> <TABLE> <CAPTION><STRONG>Table 3.1:</STRONG> Example of an Association Table</CAPTION> <TR><TD> <DIV ALIGN="CENTER"> <TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER"> <TR><TD ALIGN="LEFT">SCI</TD> <TD ALIGN="LEFT">BIAS</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT">QUAL_BIAS</TD> <TD ALIGN="LEFT">BIAS_MASTER</TD> </TR> <TR><TD ALIGN="LEFT">susi0097.bdf</TD> <TD ALIGN="LEFT">susi0124.bdf</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT">susi_124_125.bdf</TD> </TR> <TR><TD ALIGN="LEFT">susi0098.bdf</TD> <TD ALIGN="LEFT">susi0124.bdf</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT">susi_124_125.bdf</TD> </TR> <TR><TD ALIGN="LEFT">susi0099.bdf</TD> <TD ALIGN="LEFT">susi0126.bdf</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT">susi_124_125_126.bdf</TD> </TR> <TR><TD ALIGN="LEFT">susi0100.bdf</TD> <TD ALIGN="LEFT">susi0124.bdf</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT">susi_125_126_127.bdf</TD> </TR> </TABLE></DIV> <A NAME="ccd:association-table"> </A> </TD></TR> </TABLE> </DIV> <BR> <P> After inspecting the master calibration frame, the user may decide that this is not what (s)he wants and that using another master calibration frame would be better. For example, one can require that in the calibration process of frame <TT>susi0099.bdf</TT> the master bias <TT>susi_124_125.bdf</TT> is to be used, <I>i.e.</I> the bias frames associated with the science frames <TT>susi0097.bdf</TT> and <TT>susi0098.bdf</TT>. The change can either be made by running the DO package once more with slightly different selection rules, or by using the command <TT>EDIT/TABLE</TT>. <P> In addition to the standard naming convention three other input formats can be used in the Association Table. The first one is the use of non-standard name(s) (<I>i.e.</I> frame names that are not related to a data set), <I>e.g.</I> <TT>stdbias.bdf</TT> instead of <TT>susi_124_125.bdf</TT>. In this case the system requires that the master bias <TT>stdbias.bdf</TT> already exists. A second possibility is to have an asterisk <TT>*</TT>, indicating that all single raw calibration frame associated with a particular science frame are to be combined. In that case the names of the single frames will be retrieved for the Association Table. The third possibility is to store constants in the Association Table, <I> e.g.</I> <TT>294</TT> instead of <TT>susi_124_125.bdf</TT>. <P> An example of these three input possibilities is given in Table <A HREF="node40.html#ccd:modified-association-table">3.2</A>. Here, for the reduction of the frame <TT>susi0097.bdf</TT> a constant bias value of <TT>294</TT> is used while the frame <TT>susi0099.bdf</TT> will be calibrated using all available single bias frames associated with that science frame. Frame <TT>susi0100.bdf</TT> will be reduced with the standard bias frame <TT>stdbias.bdf</TT> that is assumed to be present in the working directory. <P> <BR> <DIV ALIGN="CENTER"><A NAME="1711"> </A> <TABLE> <CAPTION><STRONG>Table 3.2:</STRONG> Example of a manually modified Association Table</CAPTION> <TR><TD> <DIV ALIGN="CENTER"> <TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER"> <TR><TD ALIGN="LEFT">SCI</TD> <TD ALIGN="LEFT">BIAS</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT">QUAL_BIAS</TD> <TD ALIGN="LEFT">BIAS_MASTER</TD> </TR> <TR><TD ALIGN="LEFT">susi0097.bdf</TD> <TD ALIGN="LEFT">susi0124.bdf</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT">295</TD> </TR> <TR><TD ALIGN="LEFT">susi0098.bdf</TD> <TD ALIGN="LEFT">susi0124.bdf</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT">susi_124_125.bdf</TD> </TR> <TR><TD ALIGN="LEFT">susi0099.bdf</TD> <TD ALIGN="LEFT">susi0126.bdf</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT">*</TD> </TR> <TR><TD ALIGN="LEFT">susi0100.bdf</TD> <TD ALIGN="LEFT">susi0124.bdf</TD> <TD ALIGN="LEFT">...</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT">stdbias.bdf</TD> </TR> </TABLE></DIV> <A NAME="ccd:modified-association-table"> </A> </TD></TR> </TABLE> </DIV> <BR> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html1948" HREF="node41.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html1945" HREF="node37.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html1941" HREF="node39.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html1947" 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="tex2html1949" HREF="node41.html">Basic Reduction Steps</A> <B> Up:</B> <A NAME="tex2html1946" HREF="node37.html">Setting up the Reduction</A> <B> Previous:</B> <A NAME="tex2html1942" HREF="node39.html">Data Retrieval and Organization</A> <!--End of Navigation Panel--> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>
