Description
Changes the spectral reference frame of an image (cube).
The spectral values assigned to an object depend on the spectral reference frame. This task can change the frame in which the image reports its spectral values.
Parameter descriptions
imagename
Name of the input image.
output
Name of the output image. Default (no output) is to modify the input image.
outframe
Spectral frame in which the frequency or velocity values will be reported by default. See Spectral Frames for more information on the frame definitions.
| Abbreviation | Definition |
| lsrk | local standard of rest (kinematic) - default |
| lsrd | local standard of rest (dynamic) |
| bary | barycentric |
| geo | geocentric |
| topo | topocentric |
| galacto | galactocentric |
| lgroup | local group |
| cmb | Cosmic Microwave Background dipole |
epoch
Epoch to be associated with this image (only with outframe='geo' or 'topo'). For example: '2000/12/25/18:30:00.10'.
restfreq
Rest-frequency to use for velocity value. For example: restfreq='1.420405752GHz' for the HI 21cm line of neutral hydrogen. The default is to use the rest-frequency already present in the input image.