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<H3><A NAME="SECTION00841100000000000000">
SELECT/ROMAFOT</A>
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<TT>SELECT/ROMAFOT</TT>
<FONT SIZE="-1"><TT>frame [int_tab] [wnd_size]</TT></FONT>
<P>
With this command the user can select a number of well behaving
stellar images to determine the Point Spread Function on the frame.
These well behaving stellar objects (of the order of 10 to 15)
should be chosen over the whole frame. <BR>
<TT>SELECT/ROMAFOT</TT> displays the frame (or part of it) on the
image display and allows the user to select the objects. The
image display cursor and its control box is used to select the objects .
<P>
Since this command is also used to select special classes of objects,
(e.g. photometric standards) it asks for magnitudes and names
of the objects selected. If these are unknown the default can be used.
<P>
After execution a set of subframes with given dimensions (typically 21
by 21 pixels) centered on the input cursor position and each containing
one star is stored in the intermediate table. This table can be feeded
to the the command <TT>FIT/ROMAFOT</TT> which actually performs the
fit to the data. The table also contains trial values both for the
sky background and the central intensity of the stars.
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<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-15</I>
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