HEIG Note discussion: Obscore and dataproduct_type and various classes of datasets in High energy data

[Igor Chilingarian]

Bonjour Mireille,

I've looked at the attached diagram. The main issue I see here is that a
typical X-ray dataset (from Chandra and XMM-Newton) being an "event-list"
can in fact be considered as image, datacube, spectrum, and time-series all
at the same time. And there was a disperser (e.g. grating) involved, it
will make it even more complex. Therefore, I don't really understand how
you can build any kind of hierarchical relationship between a high-energy
dataset and existing types of a dataset in the model. Any ideas?

With best regards,
Igor


On Wed, Sep 3, 2025 at 12:31 PM Mireille Louys via dm <dm at ivoa.net> wrote:

> Dear VO Heig , ( cross post to DM as well)
>
> During the VOHE note review , I came up on a question how to identify
> the various kinds of data sets we are talking about in the note,
> and how to consider their relationships .
>
> I think we need uses cases to illustrate how a user will select a data
> set of interest from the various properties exposed:
> - in an observation data set,
> - in a response function data set ,
> -in other files as draws, pdf, regions proposed with respect to the
> Chandra archive that I have named 'explanatory datasets'
>
> ObsDataset defined in Obscore is the result of an observation process,
> using the observing configuration.
> Response  are computed from various Obsconfig parameters.
> Explanatory datasets are also computed from statistical analysis on the
> observed data.
>
> I suggest these are diffrent in nature and cannot derive from the
> Obsdataset class of Obscore .
> But they are tightly linked to it .
>
> I have tried to illustrate the relations I can guess from our
> discussions , but this must be iterated with you, High Energy astronomers ,
> and with TAP designers to converge to a clear use case .
>
> here attached is a first take  .
>
> Thanks for your comments and suggestions .
>
> Best , Mireille
>
> --
> --
> Mireille Louys, MCF (Assistant Professor)
> Centre de données Astronomiques (CDS)       Equipe Images, 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
>
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