Lightcurve datamodel?

[BONNAREL FRANCOIS]

Hi Kelle,

Unfortunately there isn't at the moment such  a recommendation as 
"TimeSeries data model".
There have been several attempts along the lines of "Cube data model" 
and Mango but none of these two data models  are a recommendation yet.

However there is a note proposing a minimal standardisation for 
TimeSeries in VOTable here :

https://www.ivoa.net/documents/Notes/LightCurveTimeSeries/20231122/TimeSeries.pdf

Basically this note explains how to describe the time coordinate system 
by using the <TIMESYS> element and how to describe the photometric 
system used for magnitudes or fluxes with the PhotCal GROUP.

To implement it you can use the Dachs framework which as far as I know 
provides these features.

All the above relates to TimeSeries representation.

Data discovery for TimeSeries is another story.

You can implement ObsTAP (ObsCore) services where dataproduct_type = 
'tilmeseries'. You can also have a look to the ObsCore Time extension  : 
https://github.com/ivoa-std/ObscoreTimeExtension which is also a "work 
in progress".

Various strategies of data discovery for TimeSeries are described in 
this document (ivoa note) :

https://ivoa.net/documents/Notes/TimeSeriesDiscoveryAndAccess/index.html



Cheers

François




Le 11/06/2024 à 22:34, Kelle Cruz via dm a écrit :
> Hi folks,
>
> I'm working on wrangling some lightcurves into a "standard" format. is 
> there a good reference document for a lightcurve datamodel? At this 
> point, I'm mostly just interested in header keywords.
>
> Thanks,
> Kelle
>
> --
> Kelle Cruz, PhD (she/her, they/them)
> Assoc. Professor, Physics and Astronomy, Hunter College
> CEO, ScienceBetter Consulting, LLC
> CFO, Startorialist, Inc. <http://shop.startorialist.com>
> Editor-in-Chief, AstroBetter Blog and Wiki <http://astrobetter.com>
> Research Associate, American Museum of Natural History
> Visiting Scholar, Flatiron Institute
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