Re: Chandra FITS images compatibility with IRAF

From: Teddy Cheung (ccc@quasar.astro.brandeis.edu)
Date: Mon Apr 02 2001 - 17:41:06 EDT


Hi Dave,

I never thought of trying zero as an extension but IRAF doesn't like this
either:

cl> display acis.fits[0]
ERROR: image has no pixels

Also, I tried other extensions starting from one and they give me
different error messages:

cl> display
image to be displayed (testy.fits): acis.fits[1]
ERROR: Illegal image type (extension) (acis.fits[1])
cl> e
display
image to be displayed (testy.fits): acis.fits[2]
ERROR: FXF: EOF encountered while reading FITS file (acis.fits[2])
cl> e
display
image to be displayed (testy.fits): acis.fits[3]
ERROR: FXF: EOF encountered while reading FITS file (acis.fits[3])

etc....

Any other ideas?

Thanks,

Teddy

On Mon, 2 Apr 2001, Dave Smith wrote:

> Teddy,
>
> In the past, I have specified the extension as well.
>
> cl> display
> image to be displayed (img_full.fits[0]):
> frame to be written into (1:4) (1):
> minimum greylevel to be displayed: 0
> maximum greylevel to be displayed: 10
> z1=0. z2=10.
>
> -Dave.
>
>
> On Mon, 2 Apr 2001, Teddy Cheung wrote:
>
> > Hi,
> >
> > I'm trying to read an ACIS FITS image with IRAF. For example, I'm just
> > trying to display it onto Saoimage:
> >
> > cl>display acis.fits
> > ERROR: FXF: must specify which FITS extension (acis.fits)
> >
> > Does anyone know what this error message means?
> >
> > The image displays on ds9 fine but won't display onto Saoimage.
> >
> > Thanks,
> >
> > Teddy
> >
> >
>
>



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