On Wed, 31 Oct 2007, Skinner Steve wrote:
> Date: Wed, 31 Oct 2007 15:49:18 -0600
> From: Skinner Steve <[log in to unmask]>
> Reply-To: Starlink Software User Support <[log in to unmask]>
> To: [log in to unmask]
> Subject: Re: [Stardev] GAIA image loads (Mac Intel OS X Tiger)
>
> Brad:
>
> I installed the Mac Intel patch and am now able to load Spitzer images
> on the Mac. Success!
Hi Steve,
good to hear that fix worked for you.
> Thanks to you folks (and esp. Peter) for resolving this issue. I think
> we can now use GAIA to do a combined Spitzer+2MASS analysis on our
> data set, which is what we want to do. There are some very nice
> features in GAIA for this such as the 2MASS Catalog overlay, and the
> Astrometric tools.
>
> One final question: I downloaded the 'Source Extractor for Dummies'
> manual by Benne Holwerda (but I did not download the software ...
> yet). Is the Object Detection software accessible via the GAIA GUI
> based on the 'Source Extractor' documented by Holwerda, or is GAIA
> using some other extractor package? I saw a reference in the old GAIA
> Cookbook to the 'SUN/226 Extractor' package (Bertin and Arnouts 1996),
> so maybe GAIA does not use the SE package described by Holwerda.
Re: the object detection toolbox. It does use SExtractor to do the
detections, so Benne's guide is useful.
To avoid confusion, EXTRACTOR is also SExtractor, the only significant
differences are that EXTRACTOR accesses our NDF data format, not FITS, and
it also uses the AST library to do all its astrometry (they are some
advantages to that). These are requirements to support our data.
Since GAIA supports FITS and NDFs, it actually uses SExtractor for FITS
data and EXTRACTOR for NDFs.
Cheers,
Peter.
--
Peter W. Draper, http://star-www.dur.ac.uk/~pdraper
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