The EPN-TAP 2.0 version of the complete asteroid data from the Minor
Planet Center (MPC), updated once per month. The MPC operates at the
Smithsonian Astrophysical Observatory under the auspices of Division
III of the International Astronomical Union (IAU).
The MPC Orbit database contains orbital elements of minor planets that
have been published in the Minor Planet Circulars, the Minor Planet
Orbit Supplement and the Minor Planet Electronic Circulars.
Estimated distances to 1.33 billion stars in Gaia DR2
Short Name:
gdr2dist scs
Date:
04 Apr 2022 15:48:41
Publisher:
The GAVO DC team
Description:
This catalogue provides distances estimates (and uncertainties therein)
for 1.33 billion stars over the whole sky brighter than about G=20.7.
These have been estimated using the parallaxes (and their uncertainties)
from Gaia DR2. A Bayesian procedure was used involving a prior
with a single parameter L(l,b), which varies smoothly with Galactic
longitude and latitude according to a Galaxy model. The posterior is
summarized with a point estimate (usually the mode) and a confidence
interval (usually the 68% highest density interval). The estimation
procedure is described in detail in the `accompanying paper`_,
which also analyses the catalogue content.
.. _accompanying paper: http://www.mpia.de/homes/calj/gdr2_distances.html
As stars in open star clusters are formed from the same matter at the
same time and have only a small velocity dispersion, it is relatively
easy to identify them from the background stars. In this tutorial, we
will identify the members of the Pleiades kinematically and get an
idea of our success by examining a color-magnitude diagram using
TOPCAT, Aladin, and a few VO services.
This tutorial uses data from Gaia DR2 to lead you through some of the
capabilities of TOPCAT and STILTS. Use cases covered include a studies
of the globular cluster M4 in proper motion space and the open cluster
Hyades in the full phase space, matches between Gaia and HST data, and
the creation of Hertzsprung-Russell diagrams.
Spectra from the Flash and Heros Echelle spectrographs developed at
Landessternwarte Heidelberg and mounted at La Silla and various other
observatories. The data mostly contains spectra of OB stars. Heros was
the name of the instrument after Flash got a second channel in 1995.
Spectra from the Flash and Heros Echelle spectrographs developed at
Landessternwarte Heidelberg and mounted at La Silla and various other
observatories. The data mostly contains spectra of OB stars. Heros was
the name of the instrument after Flash got a second channel in 1995.
This table, corresponding to gaia_source of the full DR1, contains
the 1.15 billion objects reliably detected in the first 14 months of
Gaia observations. It essentially consists of high-precision positions
and magnitudes. The TGAS subset (about 2 million objects observed by
both Gaia and Hipparcos) has proper motions and parallaxes. Users are
advised to beware strong correlations between the astrometric
parameters present for some of the less densely observed objects and
the inhomogeneous coverage in this first data release (solution id:
1635378410781933568).
A table of the light curves released with Gaia DR2 (about half a million
in total). In each Gaia band (G, BP, RP), we give epochs, fluxes and
their errors in arrays. We do not include the quality flags (DR2: “may
be safely ignored for many general purpose applications”). You can
access them through the associated datalink service if you select
source_id. You will usually join this table with gaia.dr2light.
We have also removed all entries with NaN observation times; hence,
the array lengths in the different bands can be significantly different,
and the indices in transit_ids do not always correspond to the
indices in the time series.
Furthermore, we only give fluxes and their errors here rather than
magnitudes. Fluxes can be turned into magnitude using::
mag = -2.5 log10(flux)+zero point,
where the zero points assumed for Gaia DR2 are
25.6884±0.0018 in G, 25.3514±0.0014 in BP, and
24.7619±0.0019 in RP (VEGAMAG).
This schema contains data re-published from the official
Gaia mirrors (such as ivo://uni-heidelberg.de/gaia/tap) either to
support combining its data with local tables (the various Xlite tables)
or to make the data more accessible to VO clients (e.g., epoch fluxes).
Other Gaia-related data is found in, among others, the gdr2dist, gdr3mock,
gdr3spec, gedr3auto, gedr3dist, gedr3mock, and gedr3spur schemas.