Crossmatch RAVE DR5 and HSOY (ravedr5.rave_hsoy)

Description

A crossmatch of RAVE_DR5 and the Hot Stuff for One Year (HSOY) catalog. Only stars from HSOY with comp=0 were taken to remove all possible ambiguities.

The RAVE_HSOY table contains the match of RAVE observations with a unique match (ipix = ID_PPMXL) and comp=0 to the corresponding PPMXL object in HSOY. The aim of HSOY is to provide improved proper motions partly based on Gaia data, allowing some studies to be carried out just now or as pilot studies for later larger projects requiring higher-precision data. The HSOY catalogue was compiled using the positions taken from Gaia-DR1 combined with the input data from the PPMXL catalogue, employing the same weighted least-squares technique that was used to assemble the PPMXL catalogue itself. Results. This effort resulted in a four-parameter astrometric catalogue containing 583,000,000 objects, with Gaia-DR1 quality positions and proper motions with precisions from significantly less than 1 mas/yr to 5 mas/yr, depending on the object"s brightness and location on the sky. (http://ads.ari.uni-heidelberg.de/abs/2017arXiv170102629A)

Attribution

Funding for Rave has been provided by:

the Leibniz Institute for Astrophysics Potsdam (AIP);
the Australian Astronomical Observatory;
the Australian National University;
the Australian Research Council;
the French National Research Agency;
the German Research Foundation (SPP 1177 and SFB 881);
the European Research Council (ERC-StG 240271 Galactica);
the Istituto Nazionale di Astrofisica at Padova;
the Johns Hopkins University;
the National Science Foundation of the USA (AST-0908326);
the W. M. Keck foundation;
the Macquarie University;
the Netherlands Research School for Astronomy;
the Natural Sciences and Engineering Research Council of Canada;
the Slovenian Research Agency;
the Swiss National Science Foundation;
the Science & Technology FacilitiesCouncil of the UK;
Opticon;
Strasbourg Observatory;
the Universities of Basel, Groningen, Heidelberg and Sydney.

This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the GaiaData Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.

Columns

Name	Type	UCD	Unit	Description
rave_obs_id	char	meta.id		Unique Identifier for RAVE objects, Observation Date, Fieldname, Fibernumber
ipix	long	meta.id.cross		The PPMXL object identifier, which in turn is the q3c ipix of the original USNO-B object; for HSOY, only (ipix, comp) is a unique identifier (primary key). The recommended identifier form is "HSOY ipix.comp, where comp=0 for NULL comps. This is what the SCS generates.
comp	short	meta.code.multip		If non-null this indicates that multiple Gaia objects matched the PPMXL object; this may indicate bona fide multiple stars, but more likely is due to failed matching of Gaia observations at different epochs. In both cases, proper motions must be used with care. The index is artificial, i.e., no primary, secondary, etc, is implied. ipix+comp together are a primary key to hsoy.main.
raj2000	double	pos.eq.ra meta.main	deg	Right Ascension J2000.0, epoch 2000.0
dej2000	double	pos.eq.dec meta.main	deg	Declination J2000.0, epoch 2000.0
e_raepra	float	stat.error pos.eq.ra meta.main	deg	Mean error in RA*cos(delta) at mean epoch
e_deepde	float	stat.error pos.eq.dec meta.main	deg	Mean error in Dec at mean epoch
pmra	float	pos.pm pos.eq.ra	deg/yr	Proper Motion in RA*cos(delta)
pmde	float	pos.pm pos.eq.dec	deg/yr	Proper Motion in Dec
e_pmra	float	stat.error pos.pm pos.eq.ra	deg/yr	Mean error in pmRA*cos(delta)
e_pmde	float	stat.error pos.pm pos.eq.dec	deg/yr	Mean error in pmDE
epra	float	time.epoch pos.eq.ra	yr	Mean Epoch (RA)
epde	float	time.epoch pos.eq.dec	yr	Mean Epoch (Dec)
jmag	float	phot.mag em.IR.J	mag	J selected default magnitude from 2MASS
e_jmag	float	stat.error phot.mag em.IR.J	mag	J total magnitude uncertainty
hmag	float	phot.mag em.IR.H	mag	H selected default magnitude from 2MASS
e_hmag	float	stat.error phot.mag em.IR.H	mag	H total magnitude uncertainty
kmag	float	phot.mag em.IR.K	mag	K_s selected default magnitude from 2MASS
e_kmag	float	stat.error phot.mag em.IR.K	mag	K_s total magnitude uncertainty
b1mag	float	phot.mag em.opt.B	mag	B mag from USNO-B, first epoch
b2mag	float	phot.mag em.opt.B	mag	B mag from USNO-B, second epoch
r1mag	float	phot.mag em.opt.R	mag	R mag from USNO-B, first epoch
r2mag	float	phot.mag em.opt.R	mag	R mag from USNO-B, second epoch
imag	float	phot.mag em.opt.I	mag	I mag from USNO-B
magsurveys	char	meta.code		Surveys the USNO-B magnitudes are taken from
nobs	short	meta.number obs		Number of observations contributing to this column (always nobs(ppmxl)+1)
gaia_id	long	meta.id		Unique source identifier
phot_g_mean_mag	float	phot.mag em.opt stat.mean	mag	Mean magnitude in the G band from Gaia DR1. Magnitudes for which err_flux/flux>0.1 have been dropped.
e_phot_g_mean_mag	float	stat.error phot.mag em.opt.V	s**-1	Estimated error in Gaia G-band magnitude. This is estimated as 1.09*err_flux/flux which is good as a symmetric 1 σ-error of the magnitude to at least within a few percent when err_flux/flux is smaller than 0.1, as it is for the HSOY objects.
clone	short	meta.code.qual		If 1, more than one PPMXL object matched to this Gaia object (i.e.: proper motion is probably wrong, any apparent duplicity is probably spurious). This is normally due to failed matching of objects from different plates in USNO-B.