<!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>A simple photometer</TITLE> <META NAME="description" CONTENT="A simple photometer"> <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="next" HREF="node630.html"> <LINK REL="previous" HREF="node628.html"> <LINK REL="up" HREF="node628.html"> <LINK REL="next" HREF="node630.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html9366" HREF="node630.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html9363" HREF="node628.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html9357" HREF="node628.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html9365" 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="tex2html9367" HREF="node630.html">A modern single-channel photometer</A> <B> Up:</B> <A NAME="tex2html9364" HREF="node628.html">Sample instrument files</A> <B> Previous:</B> <A NAME="tex2html9358" HREF="node628.html">Sample instrument files</A> <BR> <BR> <!--End of Navigation Panel--> <H3><A NAME="SECTION003257100000000000000"> A simple photometer</A> </H3> First, consider a very simple 1-channel UBV photometer. Let us assume a rather minimal instrument: no cooling or temperature regulation, and simple DC photometry. This resembles the instrument with which the UBV system was first set up. Here is the table: <P> <BR> <DIV ALIGN="CENTER"><A NAME="30539"> </A> <TABLE> <CAPTION><STRONG>Table:</STRONG> Instrument table file for a simple photometer</CAPTION> <TR><TD> <P> Descriptor values: <P> <B>NFILTCAR</B> = 1 <P> <B>NDETS</B> = 1 <P> <B>FILTSTAT</B> = <TT>DOME</TT> <P> <B>FILTCAT</B> = <TT>' '</TT> (blank string) <P> <B>CONDITION</B> = <TT>AVERAGE</TT> <P> <P> <DIV ALIGN="CENTER"> Passband sub-table<TABLE CELLPADDING=3 BORDER="1"> <TR><TD ALIGN="CENTER">NBAND</TD> <TD ALIGN="LEFT">BAND</TD> <TD ALIGN="CENTER">FILTCODE_1</TD> <TD ALIGN="LEFT">REDLEAK</TD> <TD ALIGN="LEFT">RLTYPE</TD> <TD ALIGN="LEFT">MAKER</TD> </TR> <TR><TD ALIGN="CENTER">---</TD> <TD ALIGN="LEFT">--</TD> <TD ALIGN="CENTER">-----</TD> <TD ALIGN="LEFT">----</TD> <TD ALIGN="LEFT">---</TD> <TD ALIGN="LEFT">----</TD> </TR> <TR><TD ALIGN="CENTER">1</TD> <TD ALIGN="LEFT">U</TD> <TD ALIGN="CENTER">3</TD> <TD ALIGN="LEFT">MEASURED</TD> <TD ALIGN="LEFT">LOOSE</TD> <TD ALIGN="LEFT">CORNING</TD> </TR> <TR><TD ALIGN="CENTER">2</TD> <TD ALIGN="LEFT">B</TD> <TD ALIGN="CENTER">1</TD> <TD ALIGN="LEFT">IGNORED</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> <TR><TD ALIGN="CENTER">3</TD> <TD ALIGN="LEFT">V</TD> <TD ALIGN="CENTER">2</TD> <TD ALIGN="LEFT">ABSENT</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> <TR><TD ALIGN="CENTER">4</TD> <TD ALIGN="LEFT">URL</TD> <TD ALIGN="CENTER">4</TD> <TD ALIGN="LEFT">ABSENT</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> </TABLE> <P> <P> Detector sub-table<TABLE CELLPADDING=3 BORDER="1"> <TR><TD ALIGN="CENTER">NDET</TD> <TD ALIGN="CENTER">DET</TD> <TD ALIGN="CENTER">SNUMBER</TD> <TD ALIGN="CENTER">MODE</TD> <TD ALIGN="CENTER">COOLING</TD> </TR> <TR><TD ALIGN="CENTER">--</TD> <TD ALIGN="CENTER">--</TD> <TD ALIGN="CENTER">----</TD> <TD ALIGN="CENTER">--</TD> <TD ALIGN="CENTER">----</TD> </TR> <TR><TD ALIGN="CENTER">1</TD> <TD ALIGN="CENTER">PMT</TD> <TD ALIGN="CENTER">S-4</TD> <TD ALIGN="CENTER">DC</TD> <TD ALIGN="CENTER">NONE</TD> </TR> </TABLE> </DIV> <A NAME="tbl:simple-example"> </A></TD></TR> </TABLE> </DIV> <BR> <P> As there is only one detector, we need not include the NDETUSED column. <P> <BR> <DIV ALIGN="CENTER"><A NAME="30559"> </A> <TABLE> <CAPTION><STRONG>Table:</STRONG> Instrument table file for a typical modern photometer</CAPTION> <TR><TD> Descriptor values: <P> <B>NFILTCAR</B> = 2 <P> <B>NDETS</B> = 1 <P> <B>FILTSTAT</B> = <TT>DOME</TT> <P> <B>FILTCAT</B> = <TT>' '</TT> (blank string) <P> <B>CONDITION</B> = <TT>AVERAGE</TT> <P> <P> <DIV ALIGN="CENTER"> <P> Passband sub-table<TABLE CELLPADDING=3 BORDER="1"> <TR><TD ALIGN="CENTER">NBAND</TD> <TD ALIGN="LEFT">BAND</TD> <TD ALIGN="CENTER">FILTCODE_1</TD> <TD ALIGN="CENTER">FILTCODE_2</TD> <TD ALIGN="RIGHT">NDVALUE</TD> <TD ALIGN="LEFT">REDLEAK</TD> <TD ALIGN="LEFT">RLTYPE</TD> <TD ALIGN="LEFT">MAKER</TD> </TR> <TR><TD ALIGN="CENTER">---</TD> <TD ALIGN="LEFT">--</TD> <TD ALIGN="CENTER">-----</TD> <TD ALIGN="CENTER">-----</TD> <TD ALIGN="RIGHT">----</TD> <TD ALIGN="LEFT">----</TD> <TD ALIGN="LEFT">----</TD> <TD ALIGN="LEFT">---</TD> </TR> <TR><TD ALIGN="CENTER">1</TD> <TD ALIGN="LEFT">u</TD> <TD ALIGN="CENTER">10</TD> <TD ALIGN="CENTER">0</TD> <TD ALIGN="RIGHT">1.000</TD> <TD ALIGN="LEFT">MEASURED</TD> <TD ALIGN="LEFT">CEMENTED</TD> <TD ALIGN="LEFT">SCHOTT</TD> </TR> <TR><TD ALIGN="CENTER">2</TD> <TD ALIGN="LEFT">v</TD> <TD ALIGN="CENTER">20</TD> <TD ALIGN="CENTER">0</TD> <TD ALIGN="RIGHT">1.000</TD> <TD ALIGN="LEFT">BLOCKED</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> <TR><TD ALIGN="CENTER">3</TD> <TD ALIGN="LEFT">b</TD> <TD ALIGN="CENTER">30</TD> <TD ALIGN="CENTER">0</TD> <TD ALIGN="RIGHT">1.000</TD> <TD ALIGN="LEFT">BLOCKED</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> <TR><TD ALIGN="CENTER">4</TD> <TD ALIGN="LEFT">y</TD> <TD ALIGN="CENTER">40</TD> <TD ALIGN="CENTER">0</TD> <TD ALIGN="RIGHT">1.000</TD> <TD ALIGN="LEFT">BLOCKED</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> <TR><TD ALIGN="CENTER">5</TD> <TD ALIGN="LEFT">uND</TD> <TD ALIGN="CENTER">11</TD> <TD ALIGN="CENTER">0</TD> <TD ALIGN="RIGHT">9.897</TD> <TD ALIGN="LEFT">MEASURED</TD> <TD ALIGN="LEFT">CEMENTED</TD> <TD ALIGN="LEFT">SCHOTT</TD> </TR> <TR><TD ALIGN="CENTER">6</TD> <TD ALIGN="LEFT">vND</TD> <TD ALIGN="CENTER">21</TD> <TD ALIGN="CENTER">0</TD> <TD ALIGN="RIGHT">9.763</TD> <TD ALIGN="LEFT">BLOCKED</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> <TR><TD ALIGN="CENTER">7</TD> <TD ALIGN="LEFT">bND</TD> <TD ALIGN="CENTER">31</TD> <TD ALIGN="CENTER">0</TD> <TD ALIGN="RIGHT">9.674</TD> <TD ALIGN="LEFT">BLOCKED</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> <TR><TD ALIGN="CENTER">8</TD> <TD ALIGN="LEFT">yND</TD> <TD ALIGN="CENTER">41</TD> <TD ALIGN="CENTER">0</TD> <TD ALIGN="RIGHT">9.695</TD> <TD ALIGN="LEFT">BLOCKED</TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> <TR><TD ALIGN="CENTER">9</TD> <TD ALIGN="LEFT">DARK</TD> <TD ALIGN="CENTER">any</TD> <TD ALIGN="CENTER">1</TD> <TD ALIGN="RIGHT"> </TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> <TD ALIGN="LEFT"> </TD> </TR> </TABLE> <P> <P> Detector sub-table<TABLE CELLPADDING=3 BORDER="1"> <TR><TD ALIGN="CENTER">NDET</TD> <TD ALIGN="CENTER">DET</TD> <TD ALIGN="CENTER">SNUMBER</TD> <TD ALIGN="CENTER">MODE</TD> <TD ALIGN="CENTER">DEADTYPE</TD> <TD ALIGN="CENTER">DEADTIME</TD> <TD ALIGN="CENTER">DEADTIMEERROR</TD> <TD ALIGN="CENTER">COOLING</TD> <TD ALIGN="CENTER">DETTEMP</TD> </TR> <TR><TD ALIGN="CENTER">--</TD> <TD ALIGN="CENTER">--</TD> <TD ALIGN="CENTER">----</TD> <TD ALIGN="CENTER">--</TD> <TD ALIGN="CENTER">-----</TD> <TD ALIGN="CENTER">----</TD> <TD ALIGN="CENTER">-------</TD> <TD ALIGN="CENTER">-----</TD> <TD ALIGN="CENTER">----</TD> </TR> <TR><TD ALIGN="CENTER">1</TD> <TD ALIGN="CENTER">PMT</TD> <TD ALIGN="CENTER">QBIALKAI</TD> <TD ALIGN="CENTER">PC</TD> <TD ALIGN="CENTER">EXTENDING</TD> <TD ALIGN="CENTER">6.74E-8</TD> <TD ALIGN="CENTER">4.2E-9</TD> <TD ALIGN="CENTER">REGULATED</TD> <TD ALIGN="CENTER">273.</TD> </TR> </TABLE> </DIV> <A NAME="tbl:modern-example"> </A></TD></TR> </TABLE> </DIV> <BR> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html9366" HREF="node630.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html9363" HREF="node628.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html9357" HREF="node628.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html9365" 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="tex2html9367" HREF="node630.html">A modern single-channel photometer</A> <B> Up:</B> <A NAME="tex2html9364" HREF="node628.html">Sample instrument files</A> <B> Previous:</B> <A NAME="tex2html9358" HREF="node628.html">Sample instrument files</A> <!--End of Navigation Panel--> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>
