SDM evolution roadmap: Data.FluxAxis.Accuracy.LowerLimit another UCD suggestion

[Laurent Michel]

Hello

AS questioned by Mark Upper/Lower limits are not Error terms. There are detection thresholds.

UpperLimit: If it was a source here it would have a flux below the upper limit
- instr.sensitivity;phot.flux;stat.max ??

Lower limit: If it was a source here it would have a flux above the lower limit
- instr.sensitivity;phot.flux;stat.min ??

Laurent


Le 27/07/2022 à 17:10, CresitelloDittmar, Mark a écrit :
> Thanks Mireille,
> 
> These are very similar to the current placeholders ( which mimic the StatErrorLow|High element ucds )
> The main question I have about this was/is:
>    o is LowerLimit/UpperLimit conceptually considered an Error term?
> If not, then perhaps the detection limit options are more appropriate.
> 
> Mark
> 
> 
> 
> On Tue, Jul 26, 2022 at 11:40 AM Mireille LOUYS <mireille.louys at unistra.fr <mailto:mireille.louys at unistra.fr>> wrote:
> 
>     Dear dmers,
> 
>     just on the UCD assignation , I have another suggestion for /Data.FluxAxis.Accuracy.LowerLimit /
>     which also validates in the UCD builder tool (http://cdsweb.u-strasbg.fr/UCD/cgi-bin/descr2ucd
>     <http://cdsweb.u-strasbg.fr/UCD/cgi-bin/descr2ucd> ) and contains the flux information:
>     stat.error;phot.flux;stat.min
> 
>     /Data.FluxAxis.Accuracy.UpperLimit/ whould also have this UCD
>     stat.error;phot.flux;stat.max
> 
>     Thanks , Mireille,
>     for the UCD maintenance committee.
> 
> 
>     Le 21/07/2022 à 20:22, CresitelloDittmar, Mark a écrit :
>>     Hi,
>>
>>     Follow-up on the UCD topic.  I've started a new Issue in the repository
>>     <https://github.com/ivoa-std/SpectrumDM/issues/5> for this, so it can be worked outside of the structural model changes.
>>     The primary objective is to select the proper terms for the new elements.. I'm not sure if we need to go outside this list
>>     for that, but I'm hoping Vandana and Petr can get some review on this and provide feedback.
>>
>>     The following shows the UCDs put into this PR, and the suggested values per the UCD Builder utility.
>>
>>       * Data.SpectralAxis.order => "instr.order"
>>       * Data.SpectralAxis.relorder => "instr.order"
>>           o UCD builder suggests: "stat.variance;instr.order" for both, though "instr.order" can stand on its own.
>>       * Data.FluxAxis.Accuracy.LowerLimit => "stat.error.phot.flux.density;em.*;stat.min" (Same as StatErrorLow)
>>           o UCD builder suggests:
>>               + "statistical lower limit" -> "stat.value;stat.min"
>>               + "detection lower limit" -> "instr.saturation;stat.min"
>>       * Data.FluxAxis.Accuracy.UpperLimit => "stat.error.phot.flux.density;em.*;stat.max" (Same as StatErrorHigh)
>>           o UCD builder suggests:
>>               + "statistical upper limit" -> "stat.value;stat.max"
>>               + "detection upper limit" -> "instr.saturation;stat.max"
>>
>>
>>     Mark
> 
>     -- 
>     --
>     Mireille Louys,  MCF (Associate Professor)
>     Centre de données CDS		IPSEO, Images, Laboratoire Icube
>     Observatoire de Strasbourg	Telecom Physique Strasbourg
>     11 rue de l'Université		300, Bd Sebastien Brandt CS 10413
>     F- 67000-STRASBOURG		F-67412 ILLKIRCH Cedex
>     Tel: +33 3 68 85 24 34
> 

--
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jesuischarlie/Tunis/Paris/Bruxelles/Berlin

Laurent Michel
SSC XMM-Newton
Tél : +33 (0)3 68 85 24 37
Fax : +33 (0)3 )3 68 85 24 32
Université de Strasbourg <http://www.unistra.fr>
Observatoire Astronomique
11 Rue de l'Université
F - 67200 Strasbourg
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