Bounds

Define analysis region. There are several choices:

Define a square region by it's center and `radius', Define a rectangle by two opposite corners, Define a circle by a center and a radius, Define the total map as the region.

All positions may be specified in terms of detector pixel coordinates, RA and Dec or by the cursor. Some commands (notably Time) will require an outer box to be defined.

Box

This maps into the box region used by ftools and saoimage. You specify the center, full width, full height, and a rotation angle. The angle can have units of _wcs to indication the rotation is in World coordinates. Thus with 0_wcs the box is aligned east/west even if the image is rotated.

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