DRAFT: IVOA ObsCore Extension and Discovery of High Energy Astrophysics Data Note

[Igor Chilingarian]

HI Janet,

I've quickly read through the document and have one question/concern. It
doesn't seem easy to describe although quite rarely used but still
available observing mode of (some) modern X-ray observatories: a grating
spectrum (e.g., Chandra HETG or XMM-Newton RGS). In this case you still
have an event list but the detector position corresponds to a specific
wavelength/energy. Actually, in the optical world a similar situation
occurs when a photon counting device is used as a detector in a
spectrograph (e.g. old SHELL spectra from MMT/FLWO/OakRidge; or STIS/MAMA
spectra from the HST).

With best regards,
Igor


On Wed, May 20, 2026 at 12:57 PM Janet Evans via interop <interop at ivoa.net>
wrote:

> Dear IVOA colleagues,
>
> The High Energy Interest Group (HEIG) has been working on an "IVOA Obscore
> Extension and Discovery of High Energy Data" Note over the past year.  A
> mature Draft is attached below and available for your review.
>
> The HEIG Note describes several changes to the Obscore standard and the
> addition of an HE Obscore extension that will enable robust querying of
> High Energy data in the IVOA.
>
> HEIG team members have worked over the past year to define use cases,
> understand the commonalities and differences in high-energy data across
> projects, update and define Obscore keywords, and collaborate with the
> Semantics group on vocabularies and UCDs.   Here’s a link to our Interest
> group page:  https://wiki.ivoa.net/twiki/bin/view/IVOA/HEGroup
>
> Now it’s your turn to provide us with input.  Please review the document
> and attend the Obscore Plenary scheduled for the Interop in June.  We will
> present several reference implementations and host a Panel discussion with
> the Radio group, which has a similar document prepared.
>
> During the Interop week, we are happy to meet with projects that want to
> learn more, think they have a use case not covered, or have feedback useful
> to this effort.
>
> For the entire team,
> -Janet & Bruno
>
>
>
> *Janet Evans | Software Development Manager | Chandra X-ray Center*
> Center for Astrophysics | Harvard & Smithsonian
> Office: (617) 495-7160
> 60 Garden Street | MS 81 | Cambridge, MA 02138
>
>
>
>
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