This tutorial is a dense course through the advanced functions of
TOPCAT and STILTS. It covers detailed information of how to use TOPCAT
and STILTS to find data in the VO, access them, perform crossmatches
and how to do visualisations.
This service provides oscillator strengths and transition
probabilities. Mainly based on experimental energy levels, these were
calculated with the pseudo-relativistic Hartree-Fock method including
core-polarization corrections.
This table contains line metadata computed a pseudo-relativistic
Hartree-Fock method including core-polarization corrections. Its
schema follows the first Working Draft of LineTAP.
The UCAC3 all-sky CCD astrograph catalogue, minus the fields from
2MASS and SuperCosmos and matching/object flags (which can be
recovered with a local crossmatch).
The UCD resolver uses the metadata in the current
Registry to suggest UCDs pertinent to natural language column descriptions.
In that, it fulfills a similar function as the `CDS UCD builder`_
but uses an entirely different approach.
.. _CDS UCD builder: http://cdsweb.u-strasbg.fr/UCD/cgi-bin/descr2ucd
This table contains the metadata for the plates that went into USNO-B
1.0 as best as we can reconstruct it (i.e., largely those that also
make up the Digital Sky Survey DSS). Most of the source files were
obtained from http://www.nofs.navy.mil/data/fchpix/, some additional
contributions came from Dave Monet.
A validator for IVOA identifiers, checking
conformity to version 2 of the specification.
The service returns results in a tabular format, where an identifier is
valid if no row with msg_type="ERROR" is present.
As per DALI, the format of the table returned can be controlled
through the RESPONSEFORMAT parameter; for machine consumption, the
most useful values for that parameter are probably json and votable.
The code used here is available at
http://svn.ari.uni-heidelberg.de/svn/gavo/hdinputs/ivoidval
These are 1.4GHz Very Long Baseline Interferometry images of 532
radio sources with a flux density exceeding 100uJy as determined by
Ibar et al. (2009, MNRAS, 397, 281), obtained between 2010-06-03 and
2010-09-03.
For all fields, we give frames processed using natural weighting to
preserve maximal sensitivity. For the 65 detected sources, we
additionally give frames processed using uniform weighting to suppress
sidelobes (see Middelberg et al. 2013, A&A 551, 97 for details) in
flux density measurements. Some sources have larger images to cover a
larger area because the initial coordinates were not sufficiently
accurate.
New entries in the
`Virtual Observatory <http://www.ivoa.net>`_'s registry in RSS format;
this service lets you use a common "news aggregator" to learn of
services appearing in the VO in almost real time.
The data is taken from the VO registry by querying for new records
twice a day. New items are announced here for 30 days.
To subscribe to this feed, point your browser/news aggregator
to http://dc.g-vo.org/regrss.
If you can configure your client's update frequency, for this feed it
is sufficient to update every 12 hours -- it is only updated morining and
afternoon UTC.
New entries on this feed are also distributed on the Fediverse_. To
get notifications of new VO services, subscribe to gavo@astrodon.social.
.. _Fediverse: https://astrodon.social/@gavo
This service lets VO data publishers assign Digital Object Identifiers
to their services, greatly enhancing their citability. Since
technically, the DOI references the registry record, this service can
only be used on properly registered services.