OVERPF-Overlays a FINDSP fit on another image

Description:

Overlays the Polynominal Fits on an image. Displaying a zoomed part of the image is possible. To be used with FINDSP and POLEXT.

Parameters:

IMAGE

The fibre frame - one with distorted fibre spectra approximately equally spaced.

BLACK

The data value below which the image display is to have the background colour. The display is scaled linearly between the data values specified as BLACK and WHITE.

WHITE

The data value above which the image display is to have the foreground colour. The display is scaled linearly between the data values specified as BLACK and WHITE.

PFILE

The file containing the polynominal fits. If no extension is specified, `.pol' is used.

YSTART

First Y value to be displayed.

YEND

Last Y value to be displayed.

XSTART

First X value to be displayed.

XEND

Last X value to be displayed.

EXTWID

The input may be integer or real. An integer input causes edges of pixels included to be drawn, whereas real input causes trams lines of width EXTWID to be drawn surrounding each polynomial fit.

REPEAT

Used to ask whether a display with different parameters should be made.

Authors:

jrl: John Lucey (AAO, Durham)

hme: Horst Meyerdierks (UoE, Starlink)