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

[Mireille LOUYS]

Hi Mark , hi  SDM contributers,

this is an up-to-date question for lower / upper detection limit : 
currently there is no specific UCD .
is /instr.saturation/ the proper term? I am not sure .
it implies only a limitation due to the instrument but some limitations 
also depend on the processing/ calibration assumptions .

is their a need for some new ucd terms for this quantity , and how 
should it be defined ?

To the dm group  in general:
For your information people are welcome to propose new terms.
For submitting a request for a new ucd , you can check 
https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList_1-5_RFM
The VEP-UCD links on this page illustrate how you can formalize a request.
It is a page where we collected request for new terms for the new 
version of the list, available as a Proposed Endorsed Note
at https://ivoa.net/documents/UCD1+/20220715/index.html.

best wishes , Mireille

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> 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 ) 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
>

-- 
--
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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