[ Re: Vocabularising dataproduct_type] an attempt for definitions for catalog and source list

[alberto micol]

Please see my most recent post to the other thread (subject: Re: Vocabularising dataproduct_type) 
for the ESO definition of source lists (aka source tables, we used both terms indifferently)
 and catalogs.

Ciao,
Alberto


> On 24. Mar 2020, at 17:43, Laurent MICHEL <laurent.michel at astro.unistra.fr> wrote:
> 
> Mireille
> 
> I agree with your definitions except for one item (see below)
> 
> Le 24/03/2020 à 11:06, Mireille LOUYS a écrit :
>> hi all,
>> here is my suggestion for the term */catalog/* as it has been used so far in the VO
>> /catalog/:
>> a set of physical quantities recorded from an observing/simulation process and measured/computed for a set of individual astronomical objects (sources).
>> Each catalog entry corresponds to one individual source object.
> A catalog has no necessary one individual source per row.
> - XMM provides a catalog of detections, thus sources that have been detected several times are duplicated in the catalogue (likely with different parameters).
> 
> To me the concept of catalog is related to something that has been compiled from different progenitor datasets. *Data compilation* is the key of the catalog definition.
> 
> LM
> 
>> The usual representation is a table with columns figuring the quantities and rows representing an entry.
>> /source list:/
>> a catalog where entries are derived from one or a restricted set or data products : single image, multiband image, radio or hyperspectral cube, eventlist for instance.
>> Typically, ObsTAP can handle source list as dataproducts, with coverage inherited from the progenitor dataset.
>> On the contrary very large catalogs like survey, hips catalogs with coverage='allsky' are managed within archives/datacenters and searched on with keywords from the astronomical semantics, like type of objects, regime, instrument types, survey name, etc.
>> Here is an interface example: http://cdsarc.unistra.fr/viz-bin/cat
>> Are there server applications distributing such all sky catalogs with Obscore as one single dataproduct?
>> best , Mireille
>> -- 
>> --
>> Mireille Louys,  MCF (Associate Professor)
>> 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
> 
> -- 
> ---- Laurent MICHEL              Tel  (33 0) 3 68 85 24 37
>     Observatoire de Strasbourg  Fax  (33 0) 3 68 85 24 32
>     11 Rue de l'Universite      Mail laurent.michel at astro.unistra.fr <mailto:laurent.michel at astro.unistra.fr>
>     67000 Strasbourg (France)   Web  http://astro.u-strasbg.fr/~michel <http://astro.u-strasbg.fr/~michel>
> ---

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