[daip] Re: aips

[Chris Flatters]

Chris Carilli <ccarilli at aoc.nrao.edu> writes:

> Dan Harris wrote:
> 
> > Yo Chris,
> >
> > I was trying to take an HST image into AIPS, and got these errors....
> >
> > IMLOD2: Task IMLOD  (release of 31DEC99) begins
> > IMLOD2: Reading from disk file: DA04:F622W_060695.fits
> > IMLOD2: ZTPOPD: using translated file name =
> > IMLOD2: ZTPOPD: /aips/DATA/RGALP4_3/F622W_060695.fits
> > IMLOD2: Create IMLOD       .TEMP  .   1 (MA)  on disk  4  cno    4
> > AIPS 2: Resumes
> > >IMLOD2: IMPARS: NUMBER VALUE ERROR ON EQUINOX
> > IMLOD2: TABHDR: NUMBER OUT OF RANGE ON CRVAL1
> > IMLOD2: Purports to die of UNNATURAL causes

It looks as if the FITS header might be trashed. EQUINOX should have a
simple numeric value (like 2000.0) but this message indicates that it
either has a non-numeric value or has a value with a very large exponent.
CRVAL1 appears to suffer from a similar problem.

The only thing I can suggest is to (carefully) edit the FITS header using
emacs; be careful not to change the total number of characters in any
section of the header. It is possible that this might not help much. If
numbers have been trashed in the FITS header, less obvious parts of the
file might also be trashed.

	Chris Flatters
	cflatter at nrao.edu