May 2016 InterOp

[Rob Seaman]

Le 06/04/2016 00:31, John Swinbank a écrit :

>>> Dear TDIG,
>>> 
>>> We will have one session for this IG at the upcoming InterOp meeting. I’ve already received one contribution to the agenda: please send me yours now.
>>> 
>>> Here are some thoughts to get your creative juices flowing:
>>> 
>>> - Just today I (finally…) submitted the VOEvent standard to François Bonnarel with the intention that it moves to PR state: watch this space for details.

VOEvent (v2 even) is already a standard. I presume you are talking about VTP here.


>>> - Jean-Paul, I would love to hear more about the latest news from Svom and the success you’re having with VOEvent transport over XMPP. Will you be at the meeting? If not, can you suggest somebody who will be there who can give an update?

Just pointing out that an XMPP proof of concept was demonstrated many years ago now. By all means discuss how this is being used by Svom, but the basic functionality isn’t in question.


>>> - Do either VTP or XMPP really properly fill the niche? Twitter are distributing mind-numbing volume of event data over HTTP — why aren’t we?

VOEvent transport over twitter was also demonstrated. It is a feature of VOEvent that multiple transport mechanisms are possible. Those services that need to support more than one can serve as bridges, perhaps for third-party projects.


>>> - Tim Staley announced his voeventdb service for archiving and querying VOEvents to this list in January. Unfortunately, Tim won’t be at the meeting, but he’s promised to send a few slides. Has anybody tried this service? Do you have feedback? [I was using it just this past Sunday. Works great!]

Hot-wired V is this October near Philadelphia. It would be great if people and projects who perhaps can’t attend the InterOp were to attend Hotwired (http://hotwireduniverse.org).


>>> - I spent much of this afternoon sitting in an LSST discussion about their plans for announcing transients, touching on the format and content of alert packets and the transport mechanism. They’ve already announced ambitious plans for what they want to include in events (see http://ls.st/lse-163 p29), and they aren’t backing down. What can we do to be ready?

It would help if such discussions were announced in advance to VOEvent / TDIG. If held in Tucson (or there’s a video link), I would be happy to attend, but you should also reach out to the other ANTARES folks, and if solar system use cases are included, also to the new IAU/MPC ADES format folks (http://minorplanetcenter.net/iau/info/IAU2015_ADES.pdf).


On 20 Apr 2016, at 09:24, Thomas Boch <thomas.boch at astro.unistra.fr> wrote:

>> VizieR has hundreds of catalogues with attached time series (full list available at http://vizier.u-strasbg.fr/vizier/welcome/vizierbrowse.gml?media ). It would of course make sense to publish them in a homogeneous format as this would allow generic tools to offer at least some preview and visualization features. I was however reluctant to invest time in this as I was unsure of the potential adoption of this standard. Does anyone serve (or plan to serve) time series in SimpleTimeSeries format?

SimpleTimeSeries were found to be acceptable by several VOEvent projects. As Thomas implies, it is a chicken and egg issue. We reached closure on SimpleTimeSeries long ago and IVOA carried it no further. It has been raised a second time two or three years ago and IVOA carried it no further. It was raised last fall and somebody suggested it was inadequate for some narrow purpose – but also that the alternative was equally inadequate – and IVOA is likely to again go no further. If community uptake is desired, standards have to actually reach the standards stage.

The entire notion was to adopt SimpleTimeSeries as a “simple” option and to *also* move forward on the “non-simple” solution. That SimpleTimeSeries doesn’t attempt to address every possible edge case is a feature, not a bug. If you standardize it, they will come.

Rob Seaman
Catalina Sky Survey
IAU Time Domain WG chair
One of the many former VOEvent chairs