Working Group Chair: Rafael Martinez-Galarza
Vice Chair: Pierre Fernique
Chairs Emeritus: Ada Nebot, Roy Williams, Rob Seaman, Matthew Graham, John Swinbank
Vice Chairs Emeritus: Alasdair Allan, Roy Williams, John Swinbank, Mike Fitzpatrick, Dave Morris
The time domain is the emerging field of astronomical research, as recognized in the European ASTRONET and 2010 US National Research Council Decadal Survey of Astronomy and Astrophysics. Planned facilities for the next decade and beyond, both ground-based, such as the LSST and SKA, and space-based, such as CHEOPS, EChO and PLATO, will revolutionize our understanding of the universe with nightly searches of large swathes of sky for changing objects and networks of robotic telescopes ready to follow up in greater detail selected interesting sources. This will impact essentially every area of astronomy, from the Solar System to cosmology, and from stellar evolution to extreme relativistic phenomena, making it a very rich area for scientific exploration and discovery, and extending beyond the traditional electromagnetic spectrum into neutrino and gravitational wave astronomy. Moreover, many interesting phenomena, e.g., supernovae and other types of cosmic explosions, can only be studied in the time domain. The challenges lie in the automated distribution, processing, classification, and archiving of vast streams of triggers. The VO is well-placed to support and facilitate research in this area.
The IVOA Time Domain Interest Group has evolved from the IVOA VOEvent Working Group recognizing that the mechanics of celestial event notification are now broadly resolved within the VO but that broader representation of the emerging time domain community has become necessary.
It will:
VOEvent defines the content and meaning of a standard information packet for representing, transmitting, publishing and archiving information about a transient celestial event, with the implication that timely follow-up is of interest. VOEvent 2.0 was published as an IVOA Recommendation on 11 July 2011. The VOEvent 2.0 wiki, which was used to discuss the evolution of the standard, is still available.
A tutorial introduction, based on material prepared for Hotwiring the Transient Universe IV in May 2015, is available.
The VOEvent book, "Hotwiring the Transient Universe", provides an introduction to the VOEvent system and related infrastructure. It is available in printed form from Lulu. A Kindle version is also available: do a "download file as" and drag to the documents directory on your Kindle via USB.
SkyAlert provides a web-based interface for exploring and collating VOEvents and defining personalised event alert schemes.
Dakota and Comet provide tools for connecting to high-speed TCP streams of VOEvents.
NASA Gamma-ray Coordinates Network provides a VOEvent stream of GRB and transient notices, including example source code for tools to receive messages.
VOEvent is deliberately transport-agnostic. However, the VOEvent Transport Protocol (VTP) may be used to distribute streams of VOEvents across the internet with a relatively low latency. The following "brokers" provide access to such streams. A tool such as Dakota or Comet, below, is required to subscribe.
Address | Port | Organization | Accessibility | Comments |
---|---|---|---|---|
voevent.dc3.com | 8099 | DC3 Dreams | Public | Dakota broker "home" site, feeds GCN, 4 Pi Sky, LOFAR, others. |
voevent.swinbank.org | 8099 | Comet | Public | Comet broker "home" site; deploys the latest pre-release. |
voevent.transientskp.org | 8099 | LOFAR/Univ. Amsterdam | Public | |
envoy5.cacr.caltech.edu | 8099 | Skyalert/Caltech | Public | CRTS etc. Offline as of 2014-07-08. |
voevent.4pisky.org | 8099 | 4 Pi Sky | Public | |
209.208.78.170 | 8099 | NASA GCN | Public | Only GCN events; VOEvent 1.1. |
50.116.49.68 | 8099 | NASA GCN | Public | Only GCN events; VOEvent 1.1. |
68.169.57.253 | 8099 | NASA GCN | Public | Only GCN events; VOEvent 2.0. |
45.58.43.186 | 8099 | NASA GCN | Public | Only GCN events; VOEvent 2.0. |
Since VOEvents are XML documents, they can be manipulated with a wide range of standard tools. In addition, the following libraries and tools may be useful.
voeventdb, run by the 4 Pi Sky project, provides a REST interface to a database of VOEvents. See their tutorial for examples of what this makes possible.
Shanghai interop 2017, discussion session for VOEvent
What is "Time Series 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,...
Goal: work on the Time Series model and annotation. Summary of the meeting:
A new proposal to meet a specific set of requirements Time Series 2020.
All interested parties are welcome to join the mailing list: please use it not only suggest and discuss technical proposals, but also to explore how the TDIG can best engage with your particular science goals.
Note that the volume of "spam" subscription requests received means that legitimate ones can sometimes get lost: if you don't receive a timely receipt of your subscription, please accept our apologies and try again or contact the TDIG chair or vice chair for help.
Gamma-ray Burst Coordinate Network (GCN)
RTML - Remote Telescope Markup Language and Twiki here
Space-Time Coordinate Metadata for the Virtual Observatory (STC)
Unified Content Descriptors, and more here
Resource Metdata for the Virtual Observatory
The eSTAR Project is now defunct.
I | Attachment | History | Action | Size | Date | Who | Comment |
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2013-11-14_-_Hotwired_3_Breakout.pdf | r1 | manage | 49.6 K | 2013-11-15 - 19:09 | JohnSwinbank | Summary slides from the TDIG breakout session at Hotwired 3 |
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ADASS2007_VOEventBoF_Auden.ppt | r1 | manage | 307.5 K | 2007-09-25 - 15:30 | ElizabethAuden | E. Auden's ADASS '07 BoF slides: SEAP, STAP, HPKB |
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HotwiringtheTransientUniverse.azw | r1 | manage | 3469.4 K | 2011-02-17 - 03:24 | RobSeaman | Kindle of "Hot-wiring the Transient Universe" |
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P8-3.pdf | r1 | manage | 860.4 K | 2019-04-04 - 11:25 | AdaNebot | |
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PR-VOEvent-2.0-20110601.html | r2 r1 | manage | 113.0 K | 2011-05-28 - 23:05 | RoyWilliams | |
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PR-VOEvent-2.0-20110601.pdf | r1 | manage | 1299.6 K | 2011-05-28 - 23:06 | RoyWilliams | |
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SEAP-v0.1.doc | r1 | manage | 141.0 K | 2008-10-23 - 05:54 | MatthewGraham | First write-up of SEAP |
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Sky_is_the_limit.pdf | r1 | manage | 1530.9 K | 2009-12-11 - 21:23 | RobSeaman | |
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Strasbourg-17-20July2018.pdf | r3 r2 r1 | manage | 413.8 K | 2018-08-03 - 09:45 | AdaNebot | |
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Strasbourg-TimeSeriesData-Meeting-Agenda.pdf | r1 | manage | 202.9 K | 2017-12-19 - 10:52 | AdaNebot | |
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Strasbourg-TimeSeriesData-Meeting-Agenta.pdf | r1 | manage | 202.9 K | 2017-12-19 - 10:47 | AdaNebot | |
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Strasbourg-TimeSeriesData-Meeting-MinimalRequirements.pdf | r2 r1 | manage | 95.0 K | 2017-12-19 - 13:34 | AdaNebot | |
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Strasbourg-TimeSeriesData-Meeting-Notes.pdf | r1 | manage | 504.1 K | 2017-12-19 - 11:04 | AdaNebot | |
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TS_overview.png | r1 | manage | 113.8 K | 2018-07-26 - 09:07 | AdaNebot | |
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TimeDomainHackAthon.pdf | r1 | manage | 254.5 K | 2017-05-17 - 04:51 | FrancoisBonnarel | Asterics Tech Forum discussion on Time Series |
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VOEvent-0.1.htm | r1 | manage | 17.6 K | 2004-11-25 - 15:03 | RoyWilliams | VOEvent-0.1 |
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VOEvent-0.2.htm | r1 | manage | 22.7 K | 2004-11-25 - 15:04 | RoyWilliams | VOEvent-0.2 |
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VOEvent-0.3.htm | r1 | manage | 31.5 K | 2004-12-27 - 23:05 | RoyWilliams | Version 0.3 |
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VOEvent-0.90.html | r1 | manage | 66.8 K | 2005-05-13 - 16:47 | RoyWilliams | VOEvent 0.90 |
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VOEvent-0.90.pdf | r1 | manage | 314.1 K | 2005-05-13 - 16:49 | RoyWilliams | VOEvent 0.90 pdf |
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VOEvent-0.94.html | r1 | manage | 68.2 K | 2005-06-21 - 17:34 | RoyWilliams | |
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VOEvent-0.94.pdf | r1 | manage | 206.9 K | 2005-06-21 - 17:35 | RoyWilliams | |
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VOEvent-v0.9.xsd | r1 | manage | 8.5 K | 2005-07-06 - 18:39 | RoyWilliams | VOvent schema v0.9 |
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VOEvent-v1.0-schema.pdf | r1 | manage | 97.5 K | 2005-07-11 - 07:06 | RobSeaman | Model diagram of the v1.0 schema |
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VOEvent-v1.0.html | r1 | manage | 70.7 K | 2005-07-11 - 09:16 | RobSeaman | VOEvent v1.0 specification |
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VOEvent-v1.0.xsd | r1 | manage | 7.6 K | 2005-07-11 - 07:04 | RobSeaman | VOEvent v1.0 schema |
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VOEvent-v1.01.xsd | r1 | manage | 7.6 K | 2006-03-24 - 02:33 | RoyWilliams | New start on the schema March 2006 |
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VOEvent-v1.1-060425.html | r1 | manage | 64.4 K | 2006-04-25 - 14:27 | RoyWilliams | VOEvent 1.1 draft 060425 |
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VOEvent-v1.1-060425.xsd | r1 | manage | 6.6 K | 2006-04-25 - 14:28 | RoyWilliams | VOEvent 1.1 schema draft 060425 |
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VOEvent-v1.1-060501.html | r1 | manage | 65.1 K | 2006-05-01 - 23:06 | RoyWilliams | VOEvent 1.1 draft 060501 |
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VOEvent-v1.1-060508.html | r1 | manage | 70.9 K | 2006-05-08 - 00:53 | RoyWilliams | Elaboration of the STC section |
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VOEvent-v1.1-060508.xsd | r1 | manage | 6.7 K | 2006-05-09 - 20:24 | RoyWilliams | Correct links to STC 1.30 |
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VOEvent-v1.1-060510.html | r1 | manage | 71.7 K | 2006-05-10 - 23:24 | RoyWilliams | corrected the STC section |
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VOEvent-v1.1-060511.html | r1 | manage | 73.9 K | 2006-05-11 - 20:07 | RoyWilliams | |
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VOEvent-v1.1-060519.html | r1 | manage | 74.3 K | 2006-05-19 - 14:06 | RoyWilliams | Near final version 1.1 after IVOA |
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VOEvent-v1.1-060519.xsd | r1 | manage | 6.1 K | 2006-05-19 - 14:05 | RoyWilliams | Near-final schema. Change is element=unqualified. |
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VOEvent-v1.1-060808.xsd | r1 | manage | 6.4 K | 2006-08-09 - 17:50 | RoyWilliams | Adds "format" atrtribute to Description, etc |
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VOEventService-0.2.html | r2 r1 | manage | 108.5 K | 2008-10-08 - 05:39 | MatthewGraham | |
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VOEventStream-0.2.html | r1 | manage | 108.4 K | 2008-10-17 - 02:37 | RoyWilliams | |
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VOEvent_transport_060412.html | r1 | manage | 42.5 K | 2006-05-11 - 20:30 | RobSeaman | |
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VOEvent_v1.1.html | r3 r2 r1 | manage | 76.3 K | 2006-06-29 - 22:22 | RoyWilliams | VOEvent v1.1 - IVOA Proposed Recommendation |
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VOEvent_v1.1.pdf | r1 | manage | 232.0 K | 2006-06-22 - 16:05 | RobSeaman | VOEvent v1.1 - IVOA PR PDF |
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adassxix_voevent.pdf | r1 | manage | 3398.3 K | 2009-10-20 - 17:20 | RobSeaman | Slides from ADASS XIX on transient response |
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autoBof.pdf | r2 r1 | manage | 45.2 K | 2006-10-07 - 05:15 | RobSeaman | Revised Agenda for Autonomous BoF |
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cubeDM.PDF | r1 | manage | 1344.8 K | 2017-11-28 - 12:36 | AdaNebot | |
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example1-v1.0.xml | r1 | manage | 0.8 K | 2005-07-11 - 07:13 | RobSeaman | Simple VOEvent XML packet |
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example2-v1.0.xml | r1 | manage | 3.2 K | 2005-07-11 - 07:14 | RobSeaman | Typical VOEvent packet |
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example3-v1.0.xml | r1 | manage | 0.2 K | 2005-07-11 - 07:17 | RobSeaman | Indirection packet (w/o schema) |
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gray-bof-vocabularies.pdf | r1 | manage | 104.2 K | 2007-09-25 - 07:40 | NormanGray | Norman Gray's vocabularies talk, ADASS VOEvent BoF |
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ivo_GCN_swift_20250563a_20060323_073655.xml | r1 | manage | 2.1 K | 2006-03-25 - 00:32 | RoyWilliams | Talons event using 1.01 schema |
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noao_posters.tar | r1 | manage | 4880.0 K | 2009-12-03 - 09:18 | RobSeaman | posters from various meetings (by P. Marenfeld) |
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obs_agent.pdf | r1 | manage | 14218.2 K | 2008-11-10 - 19:00 | RobSeaman | Slides from ADASS on agents (w/ bonus topic) |
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pointer.xml | r2 r1 | manage | 0.4 K | 2005-07-06 - 21:36 | RoyWilliams | VOEvent example that just points to another |
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simple.xml | r3 r2 r1 | manage | 0.8 K | 2005-07-07 - 22:18 | RoyWilliams | Simple VOEvent example |
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typical.xml | r5 r4 r3 r2 r1 | manage | 3.1 K | 2006-03-25 - 00:30 | RoyWilliams | Packet that uses 1.01 schema |
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voevent_v2.html | r1 | manage | 95.9 K | 2010-09-30 - 14:58 | RobSeaman | initial VOEvent v2.0 working draft |
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