Table information for 'arihip.main'

General

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: The catalogue ARIHIP has been constructed by selecting the 'best data' for a given star from combinations of HIPPARCOS data with Boss' GC and/or the Tycho-2 catalogue as well as the FK6. It provides 'best data' for 90 842 stars with a typical mean error of 0.89 mas/year (about a factor of 1.3 better than Hipparcos for this sample of stars).

For a list of all services and tables belonging to this table's resource, see Information on resource 'ARIHIP astrometric catalogue'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2001VeARI..40....1W (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:arihip_main,
  year=2010,
  title={{ARIHIP} astrometric catalogue},
  author={Wielen, R. and Schwan, H. and Dettbarn, C. and et al},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/arihip.main},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Resource Documentation

The ARIHIP Catalogue is a suitable combination of the results of the HIPPARCOS astrometry satellite with ground-based data.

The ARIHIP contains 90842 stars in total. The best astrometric data for 90072 of these ARIHIP stars have been selected from the direct solutions given in the combination catalogues FK6(I), FK6(III), GC+HIP, and TYC2+HIP. Such direct solutions are appropriate for single stars or for objects which can be treated like single stars. For these 90072 stars with direct solutions, ground-based measurements have contributed to the astrometric data (mainly to the proper motions).

In addition the ARIHIP contains the original HIPPARCOS solutions for 770 stars which do not occur in one of these combination catalogues but are basically qualified for direct solutions.

Besides the astrometric data, the ARIHIP provides a variety of flags which inform about the known (or possible) binarity of each object. From the 90842 stars in the ARIHIP we have selected 73023 objects as "astrometrically excellent stars", since their instantaneous proper motions and mean (time-averaged) ones do not differ significantly. Hence most of the astrometrically excellent stars are well-behaving "single-star candidates" with good astrometric data. These stars are most suited for high-precision astrometry.

On the other hand, 2827 of the stars in the ARIHIP are Δμ binaries in the sense of Wielen et al. (1999). Many of them are newly discovered probable binaries with no other hitherto known indication of binarity. The ARIHIP gives, besides the classical "single-star mode" solutions (SI mode), other solutions which take into account the fact that hidden astrometric binaries among "apparently single-stars" introduce sizable "cosmic errors" into the quasi-instantaneously measured HIPPARCOS proper motions and positions.

The ARIHIP gives in addition to the SI mode the "long-term prediction (LTP) mode" and the "short-term prediction (STP) mode". These LTP and STP modes are on average the most precise solutions for apparently single stars, depending on the epoch difference with respect to the HIPPARCOS epoch of about 1991. The typical mean error of an ARIHIP proper motion in the single-star mode is 0.89 mas/year. This is about a factor of 1.3 better than the typical HIPPARCOS errors for these stars of 1.13 mas/year.

In the long-term prediction mode, in which cosmic errors are taken into account, the ARIHIP proper motions have a typical mean error of 1.15 mas/year, which is by a factor of more than 1.6 better than the corresponding error for the HIPPARCOS values of 1.89 mas/year (cosmic errors included).

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
hipno HIP id Number of the star in the HIPPARCOS Catalogue (ESA 1997). N/A meta.id;meta.main
srcSel Source Source of the astrometric solution [Note src] N/A meta.flag
raj2000 RA (SI) Right ascension from a single-star solution deg pos.eq.ra;meta.main
dej2000 Dec (SI) Declination from a single-star solution deg pos.eq.dec;meta.main
pmra PM RA (SI) Proper motion in right ascension times cos(delta) for a single-star solution. deg/yr pos.pm;pos.eq.ra
pmde PM Dec (SI) Proper motion in declination for a single-star solution. deg/yr pos.pm;pos.eq.dec
t_ra Ep. RA (SI) Central epoch of RA (SI) yr time.epoch;pos.eq.ra;stat.error
err_ra Err. RA (SI) Error in RA from the single star solution, with cos(delta) already applied deg stat.error;pos.eq.ra
err_pmra Err. PM RA (SI) Mean error in PM(RA)*cos(delta) from the single star solution deg/yr stat.error;pos.pm;pos.eq.ra
t_de Ep. Dec (SI) Central epoch of Dec (SI) yr time.epoch;pos.eq.dec;stat.error
err_de Err. Dec (SI) Error in Dec from the single star solution deg stat.error;pos.eq.dec
err_pmde Err. PM Dec (SI) Mean error in PM(Dec) form the single star solution deg/yr stat.error;pos.pm;pos.eq.dec
parallax Parallax Parallax used in deriving the data of the star in the catalogue selected for the ARIHIP. This is either the HIPPARCOS parallax or a photometric/spectroscopic parallax (see Kp). deg pos.parallax
e_parallax Err. Par. Mean error of the parallax deg stat.error;pos.parallax
kp Par. Src. Source of the parallax: H Hipparcos, P photometric parallax N/A meta.ref;pos.parallax
vrad v_rad Radial velocity as used in calculating the foreshortening effect. km/s phys.veloc;pos.heliocentric
mv m_V Visual magnitude taken from the HIPPARCOS catalogue mag phot.mag;em.opt.V
km Var? Variability flag. See note. [Note var] N/A meta.code;src.var
kbin Multi? Binarity flag. See note. [Note bin] N/A meta.code;multip
kdmu Var mu? Based on Delta mu, 1 is a single-star candidate, 2 is a Delta mu binary, and empty values mean uncertain cases N/A meta.code;multip
kae Excel? Measure of astrometric quality between 1 and 3, higher is better. Empty values mean the star is not 'astrometrically excellent'. N/A meta.code.qual
raLTP RA (LTP) Right ascension in LTP mode deg pos.eq.ra
deLTP Dec (LTP) Declination in LTP mode deg pos.eq.dec
pmraLTP PM RA (LTP) Proper motion in RA, cos(delta) applied, in LTP mode deg/yr pos.pm;pos.eq.ra
pmdeLTP PM Dec (LTP) Proper motion in Dec in LTP mode deg/yr pos.pm;pos.eq.dec
t_raLTP Ep. RA (LTP) Central epoch of RA (LTP) yr time.epoch;pos.eq.ra;stat.error
err_raLTP Err. RA (LTP) Error in RA (LTP) with cos(delta) already applied deg stat.error;pos.eq.ra
err_pmraLTP Err. PM RA (LTP) Mean error in PM(RA)*cos(delta) in LTP mode deg/yr stat.error;pos.pm;pos.eq.ra
t_deLTP Ep. Dec (LTP) Central epoch of Dec (LTP) yr time.epoch;pos.eq.dec;stat.error
err_deLTP Err. Dec (LTP) Error in Dec (LTP) deg stat.error;pos.eq.dec
err_pmdeLTP Err. PM Dec (LTP) Mean error in PM(Dec) in LTP mode deg/yr stat.error;pos.pm;pos.eq.dec
raSTP RA (STP) Right ascension in STP mode deg pos.eq.ra
deSTP Dec (STP) Declination in STP mode deg pos.eq.dec
pmraSTP PM RA (STP) Proper motion in RA, cos(delta) applied, in STP mode deg/yr pos.pm;pos.eq.ra
pmdeSTP PM Dec (STP) Proper motion in Dec in STP mode deg/yr pos.pm;pos.eq.dec
t_raSTP Ep. RA (STP) Central epoch of RA (STP) yr time.epoch;pos.eq.ra;stat.error
err_raSTP Err. RA (STP) Error in RA (STP) with cos(delta) already applied deg stat.error;pos.eq.ra
err_pmraSTP Err. PM RA (STP) Mean error in PM(RA)*cos(delta) in STP mode deg/yr stat.error;pos.pm;pos.eq.ra
t_deSTP Ep. Dec (STP) Central epoch of Dec (STP) yr time.epoch;pos.eq.dec;stat.error
err_deSTP Err. Dec (STP) Error in Dec (STP) deg stat.error;pos.eq.dec
err_pmdeSTP Err. PM Dec (STP) Mean error in PM(Dec) in STP mode deg/yr stat.error;pos.pm;pos.eq.dec
raHIP RA (HIP) Right ascension in HIP mode deg pos.eq.ra
deHIP Dec (HIP) Declination in HIP mode deg pos.eq.dec
pmraHIP PM RA (HIP) Proper motion in RA, cos(delta) applied, in HIP mode deg/yr pos.pm;pos.eq.ra
pmdeHIP PM Dec (HIP) Proper motion in Dec in HIP mode deg/yr pos.pm;pos.eq.dec
t_raHIP Ep. RA (HIP) Central epoch of RA (HIP) yr time.epoch;pos.eq.ra;stat.error
err_raHIP Err. RA (HIP) Error in RA (HIP) with cos(delta) already applied deg stat.error;pos.eq.ra
err_pmraHIP Err. PM RA (HIP) Mean error in PM(RA)*cos(delta) in HIP mode deg/yr stat.error;pos.pm;pos.eq.ra
t_deHIP Ep. Dec (HIP) Central epoch of Dec (HIP) yr time.epoch;pos.eq.dec;stat.error
err_deHIP Err. Dec (HIP) Error in Dec (HIP) deg stat.error;pos.eq.dec
err_pmdeHIP Err. PM Dec (HIP) Mean error in PM(Dec) in HIP mode deg/yr stat.error;pos.pm;pos.eq.dec
parallaxSI Par. (SI) Parallax obtained in solution SI deg pos.parallax
err_parallaxSI Err. Par. (SI) Error in parallax obtained in solution SI deg stat.error;pos.parallax
parallaxSTP Par. (STP) Parallax obtained in solution STP deg pos.parallax
err_parallaxSTP Err. Par. (STP) Error in parallax obtained in solution STP deg stat.error;pos.parallax
parallaxHIP Par. (HIP) Parallax obtained in solution HIP deg pos.parallax
err_parallaxHIP Err. Par. (HIP) Error in parallax obtained in solution HIP deg stat.error;pos.parallax
ffh F_FH F-Measure for proper motions FK5 proper motions vs. Hipparcos N/A pos.pm;arith.diff;stat.fit.goodness
ff0h F_0H F-Measure for proper motions original catalogue positions vs. Hipparcos N/A pos.pm;arith.diff;stat.fit.goodness
ff0gch F_0GCH F-Measure for proper motions GC positions vs. Hipparcos N/A pos.pm;arith.diff;stat.fit.goodness
f0f F_0F F-Measure for proper motions FK5 and Hipparcos positions vs. FK5 proper motions N/A pos.pm;arith.diff;stat.fit.goodness
ft2h F_T2H F-Measure for proper motions Tycho2 and Hipparcos proper motions N/A pos.pm;arith.diff;stat.fit.goodness
flags Flags Binarity evidence and variability flags (see note) [Note tabflags] N/A meta.code

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