> Octavi Fors Aldrich wrote:
> >
> ...
> > #N XCENTER YCENTER MAG SHARPNESS SROUND GROUND ID \
> > #U pixels pixels # # # # # \
> > #F %-13.3f %-10.3f %-9.3f %-12.3f %-12.3f %-12.3f %-6d \
> > #
> > 367.152 5.504 -2.616 0.453 0.294 0.176 1
> > 319.928 8.802 -0.076 0.352 -0.506 -0.537 2
> > 65.968 16.768 -0.631 0.509 0.134 0.100 3
> > 187.129 23.329 -0.183 0.265 0.114 0.109 4
> > 944.462 27.992 -0.590 0.306 -0.315 -0.019 5
> > 645.943 32.781 -0.108 0.396 0.310 0.290 6
> > 172.217 37.837 -3.943 0.513 0.007 0.010 7
> > 69.953 45.869 -3.555 0.492 0.059 -0.026 8
> > 993.736 49.312 -3.161 0.492 -0.060 -0.033 9
> > 276.782 73.810 -3.160 0.496 0.168 0.027 10
> > 27.206 75.972 -0.492 0.316 0.613 0.230 11
> > 722.087 91.526 -1.894 0.506 -0.213 0.153 12
> > 820.559 116.932 -6.815 0.464 0.039 -0.123 13
> >
> > The interesting columns are XCENTER and YCENTER.
> >
> > What I want to do is to represent these (X,Y) image coordinates over a FITS
> > image with WCS support, which have an on-line catalog query plotted over,
> > too. How can I do this?
> >
>
> Hi Octavi,
>
> You can load the above file in skycat as a local catalog if you make
> a few changes. To see an example of the tab table format, save the
> results of a catalog search (GSC, for example) to as file.
>
> * The columns need to be separated by tabs (if they are not already)
>
> * The column headings must be separated from the rows by a dashed line
> (at least one "-" on a line by itself)
>
> * The values for RA and DEC must be in H:M:S and D:M:S resp.
> (Sorry about this last restriction - I suppose we could make
> it smarter, but it is not always clear in every case whether
> hours or degrees are meant...)

But the above file has X,Y coordinates in units of pixels. Although it's
possible to transform (X,Y) in pixels to (ra,dec) in degrees (because I
known the WCS parameters of the image), I was looking a faster solution. For
example, something similar to what SAOimage display with the Cursor|Read
command. I'm sure that Skycat also has this option, but I can't find it...

Is there really this option?

Thanks in advance,

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Octavi Fors Aldrich

Astronomy Department
Physics Faculty
Diagonal Av., 647
08028 Barcelona
SPAIN

octavi@fajnm1.am.ub.es

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