Lightcurve datamodel?

[Kelle Cruz]

I also found this PDF which is SUPER USEFUL!  It seems to be part of the
idle ImageDM project. Is there any reason not to use this table as a guide?

btw, I'm updating the table in the issue as I figure things out:
https://github.com/ivoa-std/ObscoreTimeExtension/issues/8

Thanks,
Kelle

On Thu, Jun 13, 2024 at 12:41 PM Kelle Cruz <kellecruz at gmail.com> wrote:

> What if instead of saying “standard” keywords, we call them “suggested“
> and make the table an appendix?  That way, we’re not saying people need to
> “recast” their FITS files, but we are providing useful information for
> folks generating new data products?
>
> There’s a real opportunity here to make it easier for the “common”
> astronomer to implement and adopt VO-type concepts and methods which
> improve data accessibility and reusability. Providing FITS keyword
> suggestions is immediately useful to lots of folks and would be seen as a
> positive benefit of the VO.
>
> kelle (via iOS)
>
>
> On Thu, Jun 13, 2024 at 12:24 PM CresitelloDittmar, Mark <
> mdittmar at cfa.harvard.edu> wrote:
>
>> Kelle,
>>
>> Regarding the issue you posted on the ObsCoreTimeExtension repo.
>>    https://github.com/ivoa-std/ObscoreTimeExtension/issues/8
>>
>> I thought you might hit this problem since you're looking for standard
>> FITS keywords for your lightcurves.
>> The ObsCore standard (and extensions) are targeted toward Data Discovery
>> threads, which pass the information around in VOTables annotated with
>> UTypes.
>> As such, that probably isn't a good place to put corresponding FITS
>> keywords.
>>
>> There are very few models targeting Data Products, and even there, I
>> think only Spectrum includes FITS serialization specs.  In general, the
>> data models should be independent of serialization standards, and that is
>> the direction we have been moving towards in the newer, vo-dml compliant
>> models.
>>
>> It sounds like what you are looking for is a mapping from the ObsCore
>> (and extension) UTypes to a VO recommended FITS keyword.. which I don't
>> believe exists other than what is defined in Spectrum.  Or perhaps
>> preferably a FITS serialization standard which maps model concepts to FITS
>> key/column specs... which certainly doesn't exist in the VO.
>>
>> I think the idea has been:
>>   * Everybody uses different FITS keywords to serialize their data
>>   * We need to standardize something for Data Discovery that doesn't
>> force everyone to recast their FITS files
>>   * So we'll communicate in VOTable and tag the concepts with UTypes
>>       + data providers can then map their individual keywords to the
>> ObsCore standard UTypes.
>>
>> I'm afraid this isn't a very encouraging email.. I'm not sure what to
>> recommend for you.
>> Anyone.. Please correct me if I've missed a resource that would be
>> helpful here.
>>
>> Mark
>>
>>
>>
>>
>>
>> On Wed, Jun 12, 2024 at 8:28 AM Kelle Cruz via dm <dm at ivoa.net> wrote:
>>
>>> This document has what I’m looking for!  Thanks everyone.
>>>
>>>
>>> https://github.com/ivoa-std/ObscoreTimeExtension/blob/master/ObscoreTimeExtension.pdf
>>>
>>> kelle (via iOS)
>>>
>>>
>>> On Wed, Jun 12, 2024 at 3:59 AM BONNAREL FRANCOIS <
>>> francois.bonnarel at astro.unistra.fr> wrote:
>>>
>>>> Hi,
>>>>
>>>> Ada and I wrote in parallel, but we are pointing to the same IVOA note !
>>>>
>>>> Best regards
>>>>
>>>> François
>>>>
>>>> Le 12/06/2024 à 09:57, NEBOT GOMEZ-MORAN Ada (OBS) via dm a écrit :
>>>> > Hi Kelle,
>>>> >
>>>> > we wrote this note some time ago:
>>>> >
>>>> >
>>>> https://www.ivoa.net/documents/Notes/LightCurveTimeSeries/20231122/TimeSeries.pdf
>>>> >
>>>> > but it didn’t get much attention so I haven’t made any effort on
>>>> making improvements / changes to it for some time.
>>>> >
>>>> > Let me know if this goes in the lines of your needs!
>>>> >
>>>> > Cheers,
>>>> > Ada
>>>> >
>>>> > ----- Mail d’origine -----
>>>> > De: Kelle Cruz via dm <dm at ivoa.net>
>>>> > À: dm at ivoa.net
>>>> > Envoyé: Tue, 11 Jun 2024 22:34:39 +0200 (CEST)
>>>> > Objet: Lightcurve datamodel?
>>>> >
>>>> > 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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