APERTURE-Do simple minded aperture photometry on a series of frames

Description:

The image name is read and that image is plotted on the current plot device. The user is presented with a menu which allows him/her/it to specify object and sky regions, change the colour levels, change the radius of the aperture, show cuts or quit. Integrations are a simple sum of the values of the pixels within the aperture radius.

Parameters:

OUTPUT

The name of the file where the answers will be written.

IMAGE

The name of the file with the frame to be analysed.

OPT

The option parameter. Type H for help.

LOW

The low data value for 2-D plots.

HIGH

The high data value for 2-D plots.

RADIUS

The radius of the circle to be used for the integration.

OK

Say "yes" when you are happy with the apearture.

Source comments:

 A P E R T U R E

 Description
 -----------
 Do simple minded aperture photometry on a series of frames

 Scope of program
 ----------------
 - Handles 2-D images only.
 - Data array converted to FLOAT.
 - Magic values supported.
 - Error arrays not supported
 - Quality arrays not supported.
 - Batch execution not supported.

 Parameters
 ----------
 OUTPUT    Name of output ASCII file for results. The output info goes in
           the following order: (1) Either 'O' or 'S' for "object" or
           "sky"; (2) a sequence number; (3) the x,y coords of the
           cursor, (4) the radius of the aperture; (5) the total
           flux in pixels which are with a radial distance less than
           or equal to the aperture radius.  No correction is made for
           partial pixels; (6) the total number of pixels included.
           (character)(prompted for)

 IMAGE     Name of individual images in case you're not using a
           list file. (character)(prompted for)

 RADIUS    Radius for integration. (real)(prompted for)

 LOW       Data value for lowest level in 2-d plot (real)(prompted for)

 HIGH      Data value for highest level in 2-d plot (real)(prompted for)

 Keywords
 --------
 OK

 Method
 ------
 - The image name is read and that image is plotted on the current
   plot device.
 - The user is presented with a menu which allows him/her/it to specify
   object and sky regions, change the colour levels, change the radius
   of the aperture, show cuts or quit.
 - Integrations are a simple sum of the values of the pixels within the
   aperture radius.

 Author/s
 --------
 Jim Lewis RGO (jrl@ast.cam.ac.uk)