<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Dear Marco, <div class=""><br class=""></div><div class="">Thanks for your input.</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 6 Jul 2017, at 14:47, Marco Molinaro <<a href="mailto:molinaro@oats.inaf.it" class="">molinaro@oats.inaf.it</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Dear Ada,<br class="">dear all,<br class=""><br class="">regarding the "discovery" item, related to RV Time Series<br class="">in the exoplanets domain, I had a meeting with people<br class="">from the GAPS project.<br class="">(if interested a quick summary can be found here:<br class=""><a href="https://www.asterics2020.eu/dokuwiki/doku.php?id=open:wp4:wp4gapsinaf" class="">https://www.asterics2020.eu/dokuwiki/doku.php?id=open:wp4:wp4gapsinaf</a>)<br class=""><br class="">The main point I'd like to alert about here (other parts I think<br class="">are nicely covered by your summary and review) is that a<br class="">discovery for time series when doing research on exoplanets<br class="">requires:<br class="">- host star characterisation, especially stellar activity indexes<br class=""></div></div></blockquote><div><br class=""></div>Regarding the host star characterisation, I think this is in the lines "query by object type”. </div><div>This is very important not only for exoplanets but for many other scientific cases. </div><div><br class=""></div><div><blockquote type="cite" class=""><div class=""><div class="">- planet(s) ~existence~ and characteristics<br class=""> [and this may be though because 1 stellar system potentially<br class=""> means multiple planets]<br class=""></div></div></blockquote>I agree with you<br class=""><blockquote type="cite" class=""><div class=""><div class=""><br class="">And, vice-versa, searching exoplanets having time series attached<br class="">requires as discovery metadata the search method used (this can be<br class="">a small vocabulary).<br class=""><br class="">I'll try to work on the star/activity/planets part related to the GAPS<br class="">project, the vice-versa requires other projects with different than<br class="">spectroscopic RV method to join.<br class=""><br class=""></div></div></blockquote><div><br class=""></div><span class="">There is a list of metadata needed to describe and discover TimeSeries that we came up with during the ASTERICS hackathon meeting, <br class=""></span><div>summarised by F. Bonnarel in Shanghai. I have rewritten that list under: </div><div><a href="http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG_ShanghaiSession2017#Asterics_hackathon_report_F_Bonn" class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG_ShanghaiSession2017#Asterics_hackathon_report_F_Bonn</a></div><div><br class=""></div><div>To my opinion some of the things there are too detailed/complicated, e.g. Fourier coefficients. </div><div>And I think that we can build a restricted list of minimum requirements based on those. </div><div>Please, have a look at the list and let me know among those fields which you think are a must. </div><div><br class=""></div><div>Cheers,</div><div>Ada</div><div class=""><br class=""></div><blockquote type="cite" class=""><div class=""><div class="">Cheers,<br class=""> Marco<br class=""><br class="">2017-07-04 13:08 GMT+02:00 AdaNebot <<a href="mailto:ada.nebot@astro.unistra.fr" class="">ada.nebot@astro.unistra.fr</a>>:<br class=""><blockquote type="cite" class=""><br class="">Dear All,<br class=""><br class="">In Shanghai it was decided that TimeSeries is a scientific priority of the<br class="">IVOA. Based on the DAL/DM/TDIG session, here is a list of items to be<br class="">discussed. Please feel free to add any other items you consider relevant to<br class="">TimeSeries and you would like to discuss:<br class=""><br class="">What is TimeSeries data? It is a temporal sequence of measurements<br class="">containing a time coordinate and a flux (or similar - magnitude) / RV /<br class="">position / polarisation / number of spots / spectra / images. Light-curves<br class="">and RV curves dominate the landscape of TimeSeries.<br class="">Concerning DM: there are models that work for representation of some of the<br class="">science cases proposed by the SPC.<br class=""><br class="">Modified SpectrumDM works fine for light curves with some modifications.<br class="">The draft TimeSeriesCube serialisation examples work with SPLAT. But there’s<br class="">still some discussion needed on the model.<br class="">Feedback from people who have tried both models is appreciated in this<br class="">respect.<br class="">Although light-curves and RV curves dominate the landscape of TimeSeries,<br class="">for which a modified version of SpectrumDM (or a similar for RVs) would<br class="">work, we should have an extensible model towards other kind of data, perhaps<br class="">built as a simple derivation/specialization of the SparseCube DM.<br class=""><br class="">Discovery: Obscore/EpnCore + TAP could work if the time axis information<br class="">would be extended. What are the minimum mandatory fields for TimeSeries data<br class="">to be found by the user? For that collecting science cases is important. A<br class="">set of minimum data has already been compiled during an ASTERICS meeting.<br class="">Different communities need to be properly represented. Attending to<br class="">astronomy meetings is important to hear the astro-community. See the series<br class="">of meetings under:<br class=""><a href="http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Future_Events" class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Future_Events</a>. Please<br class="">if you plan to attend any of these meetings or any other related Time Domain<br class="">meeting it would be useful to know it and to post it on the wiki.<br class="">Format: Time has to be properly formatted to combine data coming from<br class="">different surveys. See email from A. Rots (19 May 2017) sent to DM, DAL and<br class="">TDIG + reference A&A 574, 36 (2015).<br class=""><br class="">To keep track these items will be posted on the TDIG wiki, under the<br class="">TimeSeries section:<br class=""><a href="http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Time_Series_Data" class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaVOEvent#Time_Series_Data</a><br class=""><br class="">In particular under: http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG I<br class="">have already written these four items.<br class=""><br class="">You can also find a summary of the different contributions in the<br class="">DAL/DM/TDIG Shanghai session under:<br class="">http://wiki.ivoa.net/twiki/bin/view/IVOA/DAL_DM_TDIG_ShanghaiSession2017<br class=""><br class="">The intention of this email is to start productive discussions on each<br class="">topic.<br class=""><br class="">Thanks!<br class="">Ada<br class=""></blockquote></div></div></blockquote></div><br class=""></div></body></html>