[Issues] using external SourceLists

[wjvriend at astro.rug.nl]

Hi Johannes,

I've encountered this problem before and made a method to determine the
bounding box from the coordinates of the sources. Tomorrow I'll check how
to integrate this into the SourceList class.

regards,

Willem-Jan Vriend.

> 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)!
>>>
>>> _______________________________________________
>>> Issues mailing list
>>> Issues at astro-wise.org
>>> http://listman.astro-wise.org/mailman/listinfo/issues
>>>
>>
>> --
>> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>> Drs. Ewout Helmich		<><>
>> Kapteyn Astronomical Institute	<><> Astro-WISE/OmegaCEN
>> Landleven 12			<><>
>> P.O.Box 800			<><> email: helmich at astro.rug.nl
>> 9700 AV Groningen		<><> tel  : +31(0)503634548
>> The Netherlands			<><>
>> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>>
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>
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