Time Domain DAL/DM/TDIG

[Marco Molinaro]

Dear Ada,
dear all,

regarding the "discovery" item, related to RV Time Series
in the exoplanets domain, I had a meeting with people
from the GAPS project.
(if interested a quick summary can be found here:
https://www.asterics2020.eu/dokuwiki/doku.php?id=open:wp4:wp4gapsinaf)

The main point I'd like to alert about here (other parts I think
are nicely covered by your summary and review) is that a
discovery for time series when doing research on exoplanets
requires:
- host star characterisation, especially stellar activity indexes
- planet(s) ~existence~ and characteristics
  [and this may be though because 1 stellar system potentially
  means multiple planets]

And, vice-versa, searching exoplanets having time series attached
requires as discovery metadata the search method used (this can be
a small vocabulary).

I'll try to work on the star/activity/planets part related to the GAPS
project, the vice-versa requires other projects with different than
spectroscopic RV method to join.

Cheers,
    Marco

2017-07-04 13:08 GMT+02:00 AdaNebot <ada.nebot at astro.unistra.fr>:
>
> Dear All,
>
> In Shanghai it was decided that TimeSeries is a scientific priority of the
> IVOA. Based on the DAL/DM/TDIG session, here is a list of items to be
> discussed. Please feel free to add any other items you consider relevant to
> TimeSeries and you would like to discuss:
>
> What is TimeSeries data? It is a temporal sequence of measurements
> containing a time coordinate and a flux (or similar - magnitude) / RV /
> position / polarisation / number of spots / spectra / images. Light-curves
> and RV curves dominate the landscape of TimeSeries.
> Concerning DM: there are models that work for representation of some of the
> science cases proposed by the SPC.
>
> Modified SpectrumDM works fine for light curves with some modifications.
> The draft TimeSeriesCube serialisation examples work with SPLAT. But there’s
> still some discussion needed on the model.
> Feedback from people who have tried both models is appreciated in this
> respect.
> Although light-curves and RV curves dominate the landscape of TimeSeries,
> for which a modified version of SpectrumDM (or a similar for RVs) would
> work, we should have an extensible model towards other kind of data, perhaps
> built as a simple derivation/specialization of the SparseCube DM.
>
> Discovery: Obscore/EpnCore + TAP could work if the time axis information
> would be extended. What are the minimum mandatory fields for TimeSeries data
> to be found by the user? For that collecting science cases is important. A
> set of minimum data has already been compiled during an ASTERICS meeting.
> Different communities need to be properly represented. Attending to
> astronomy meetings is important to hear the astro-community. See the series
> of meetings under:
> http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Future_Events. Please
> if you plan to attend any of these meetings or any other related Time Domain
> meeting it would be useful to know it and to post it on the wiki.
> Format: Time has to be properly formatted to combine data coming from
> different surveys. See email from A. Rots (19 May 2017) sent to DM, DAL and
> TDIG + reference A&A 574, 36 (2015).
>
> To keep track these items will be posted on the TDIG wiki, under the
> TimeSeries section:
> http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Time_Series_Data
>
> In particular under: http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG I
> have already written these four items.
>
> You can also find a summary of the different contributions in the
> DAL/DM/TDIG Shanghai session under:
> http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG_ShanghaiSession2017
>
> The intention of this email is to start productive discussions on each
> topic.
>
> Thanks!
> Ada