[Issues] using external SourceLists

[sikkema at astro.rug.nl]

Hi all,

I also encountered this problem, I changed my code SourceList.py a little
bit --> I hardwired llRA, llDEC,....,urDEC, valid for my particular
external sourcelist, and added an argument whether to use the hardwire or
not.

Gert Sikkema

> Hi Johannes,
>
> Please note that Kor has days off today and tomorrow, so he probably
> won't answer before Monday.
>
> The WCS information is needed to derive the bounding box of the sources
> in the SourceList; for query purposes these attributes of SourceList:
>
> llRA                = persistent('Right Ascension of lower left
> containing box [deg]', float, 0.0)
> llDEC               = persistent('Declination of lower left containing
> box [deg]', float, 0.0)
> lrRA                = persistent('Right Ascension of lower right
> containingbox [deg]', float, 0.0)
> lrDEC               = persistent('Declination of lower right containing
> box[deg]', float, 0.0)
> ulRA                = persistent('Right Ascension of upper left
> containing box [deg]', float, 0.0)
> ulDEC               = persistent('Declination of upperer left containing
> box [deg]', float, 0.0)
> urRA                = persistent('Right Ascension of upper right
> containingbox [deg]', float, 0.0)
> urDEC               = persistent('Declination of upper right containing
> box[deg]', float, 0.0)
>
>  are set. To do this accurately apparently the projection is necessary.
>
> Ewout
>
>
>
> Johannes Koppenhoefer wrote:
>> Hello,
>>
>> I tried to create a SourceList from an external LDAC/FITS catalog
>> following the instructions in the manual on page 183 and using the
>> AWBASE code.
>> It seems the method make_sourcelist_from_catalog() needs wcs
>> information. Why is that, since the list already has ALPHA_SKY and
>> DELTA_SKY?
>>
>> Bye,
>> Johannes
>>
>>
>> awe> sl=SourceList()
>> awe> sl.catalog = 'variables.fits'
>> awe> sl.make_sourcelist_from_catalog()
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>>   File
>> "/usr/local/scipck/astrowise/opipe/AWBASE/astro/main/SourceList.py",
>> line 766, in make_sourcelist_from_catalog
>>     make_sourcelist_from_catalog creates a SourceList from a catalog
>> created
>>   File
>> "/usr/local/scipck/astrowise/opipe/AWBASE/astro/main/SourceList.py",
>> line 496, in set_coordinate_ranges
>>
>>   File
>> "/usr/local/scipck/astrowise/opipe/AWBASE/astro/main/SourceList.py",
>> line 1981, in get_projection_from_cat
>>     cdelt1 = cdelt2 = crota2 = None
>> Exception: Not enough Coordinate System Information in header (CD,
>> CDELT, CROTA)!
>>
>> _______________________________________________
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>> Issues at astro-wise.org
>> http://listman.astro-wise.org/mailman/listinfo/issues
>>
>
> --
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> Kapteyn Astronomical Institute	<><> Astro-WISE/OmegaCEN
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