Regarding Spectral WCS
Jason Quinn wrote on Jul 21, 2009
I'm trying to find references for the WAT keywords in the spectral WCS. The only paper I've found that mentions them is "The IRAF/NOAO Spectral World Coordinate Systems" (http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ASPC...52..467V). Greisen's various papers on the spectral WCS don't cover them. Is Franciso's paper the only one or have I missed a more recent reference?
Jason
Jason
Mike Fitzpatrick wrote on Jul 21, 2009
Jasson,
Frank may respond with more detail: The WAT keywords are an IRAF convention, I'll leave it to Frank to comment on where these stand wrt the FITS WCS papers (those both published and pending). Note that the command "help specwvcs" will get you the named paper in the system.
-Mike
Frank may respond with more detail: The WAT keywords are an IRAF convention, I'll leave it to Frank to comment on where these stand wrt the FITS WCS papers (those both published and pending). Note that the command "help specwvcs" will get you the named paper in the system.
-Mike
Francisco Valdes wrote on Jul 21, 2009
Jason,
I am just confirming Mike's response. IRAF WCS (spectral or otherwise) predates any FITS standards on the subject. The paper Mike pointed you to (there was a typo and should be "phelp specwcs") is the primary reference. The WAT keywords are an IRAF convention for encoding function forms.
Frank Valdes
I am just confirming Mike's response. IRAF WCS (spectral or otherwise) predates any FITS standards on the subject. The paper Mike pointed you to (there was a typo and should be "phelp specwcs") is the primary reference. The WAT keywords are an IRAF convention for encoding function forms.
Frank Valdes
Last post on Jul 21, 2009