| Parameter | Mand | Type | Default | Constraints |
| imageset | yes | string | image | |
The name of the input image.
|
| srcexp | no | string | | |
Expression for defining the source position and parameters
|
| withcoords | no | boolean | false | none |
If true, the source position must be
specified via the parameters coordtype,
x, y. Otherwise,
the source position is taken from the
centre of the source region defined in the srcexp parameter.
|
| x | no | real | | |
The X coordinate of the position to convert
|
| y | no | real | | |
The Y coordinate of the position to convert
|
| coordtype | yes | string | eqpos | eqpos pos det raw impix |
The coordinate system for which the source position, specified
by the parameter x and y, is defined.
If coordtype is set to eqpos, then x, y
correspond to RA and DEC respectively in decimal degrees.
If coordtype  pos, then x,y correspond
to POS coordinates.
(Note that the POS coordinates are defined relative to a nominal pointing position;
this is taken from the global attributes REFXCRVL and REFYCRVL of
the image dataset.)
If coordtype det, then x, y are
the x and y positions of the source centre, in DET coordinates.
If coordtype impix, then x, y are
the x,y values of a pixel in the input image.
Finally, if coordtype raw, then x, y are
the raw chip positions of the source centre. In this case the CCD
number must be specified using the ccdno parameter.
|
| pos2eqpos | no | boolean | false | none |
If true, then only the conversion from x/y to ra/dec coordinates
is made. This option is only active when withcoords=true and
coordtype=pos. It avoids problems which occur when the
RA_PNT, DEC_PNT coordinates are more than 90 degrees away from the X/Y
reference pixel position.
|
| im2eqpos | no | boolean | false | none |
If true, then only the conversion from image pixel to ra/dec coordinates
is made. This option is only active when withcoords=true and
coordtype=impix.
|
| withccd | no | boolean | false | none |
If true, the ccd number must be
specified via the parameter ccdno,
x, y. This is mandatory if the position has been
specified in raw chip coordinates.
|
| ccdno | yes | int | | |
The CCD number on which the RAW chip position falls.
|
| theta_out | no | double | | |
Output parameter that contains the off-axis angle, in units of
arc seconds.
|
| phi_out | no | double | | |
Output parameter that contains the azimuthal angle, in units of
radians.
|
| ra_out | no | double | | |
Output parameter that contains the right ascension.
|
| dec_out | no | double | | |
Output parameter that contains the declination.
|
| posx_out | no | double | | |
Output parameter that contains the POS, X position.
|
| posy_out | no | double | | |
Output parameter that contains the POS, Y position.
|
| detx_out | no | double | | |
Output parameter that contains the X position in detector coordinates
|
| dety_out | no | double | | |
Output parameter that contains the Y position in detector coordinates
|
| rawx_out | no | double | | |
Output parameter that contains the X position in raw, chip coordinates
|
| rawy_out | no | double | | |
Output parameter that contains the Y position in raw, chip coordinates
|
| ccd_out | no | int | | |
Output parameter that contains the number of the CCD which the input
position falls on.
|
| Parameter | Mand | Type | Default | Constraints |
