Table information for 'usnob.data'

General

Table Description: The USNO-B 1.0 catalogue with Barron's spurious detections removed.

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

Resource Description: The USNO-B catalog is an all-sky catalog of about 1e9 objects including their proper motions, based on scans of several sky surveys conducted between 1950 and the late 1990ies.

For a list of all services and tables belonging to this table's resource, see Information on resource 'The USNO-B 1.0 Catalog'

Table Documentation

This is the data table of USNO-B. Note that this data set is huge, and usually your queries will time out unless you specify a spatial region to search in.

The spurious detections listed by Barron et al (2008), http://adsabs.harvard.edu/abs/2008AJ....135..414B, have been removed, albeit with somewhat generous match radius, so 17327425 rows rather than 17224285 were deleted.

Note that the star/galaxy separation flag frequently is >11 and !=19, which should not be the case according to the documentation. We left it this way.

Surveys have been mappend onto characters, with A being the first blue survey. The survey 9 is mapped to survey 8 (i.e., H).

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2003AJ....125..984M (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.

Reference the Table

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

@MISC{vo:usnob_data,
  year=2008,
  title={The {USNO}-B 1.0 Catalog},
  author={{GAVO} Data Center},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/usnob.data},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
RAJ2000 RA (J2000) Right Ascension at Eq=J2000, Ep=J2000 deg pos.eq.ra;meta.main
DEJ2000 DEC (J2000) Declination at Eq=J2000, Ep=J2000 deg pos.eq.dec;meta.main
e_RAdeg Err(RA)cos(DEC) Mean error on RAdeg*cos(DEdeg) at Epoch deg stat.error;pos.eq.ra
e_DEdeg Err(DEC) Mean error on DEdeg at Epoch deg stat.error;pos.eq.dec
Epoch Epoch Mean epoch of observation yr time.epoch
pmRA pm(RA) Proper motion in RA deg/yr pos.pm;pos.eq.ra
pmDE pm(DEC) Proper motion in DE deg/yr pos.pm;pos.eq.dec
muPr P(pm) Total Proper Motion probability N/A stat.fit.goodness
e_pmRA Err(pm(RA)) Mean error on pmRA deg/yr stat.error;pos.pm;pos.eq.ra
e_pmDE Err(pm(DEC)) Mean error on pmDE deg/yr stat.error;pos.pm;pos.eq.dec
fit_RA Mean err RA fit Mean error on RA fit deg stat.error
fit_DE Mean err DEC fit Mean error on DE fit deg stat.error
Ndet N_detect Number of detections N/A meta.number
Flags Flags Flags on object [Note *] N/A meta.code
B1mag mag(B1) First blue magnitude (B1) mag phot.mag;em.opt.B
B1S B1s B1 Survey code N/A meta.id
B1f B1 field# B1 Field number in survey N/A obs.field
B1sg B1 star/gal. B1 Star/galaxy separation, A=Galaxy, L=Star N/A src.class.starGalaxy
B1xi xi(B1) B1 Residual in X direction deg stat.fit.residual;pos.cartesian.x
B1eta eta(B1) B1 Residual in Y direction deg stat.fit.residual;pos.eq.dec;arith.diff
R1mag mag(R1) First red magnitude (R1) mag phot.mag;em.opt.R
R1S R1s R1 Survey code N/A meta.id
R1f R1 field# R1 Field number in survey N/A obs.field
R1sg R1 star/gal. R1 Star/galaxy separation, A=Galaxy, L=Star N/A src.class.starGalaxy
R1xi xi(R1) R1 Residual in X direction deg stat.fit.residual;pos.cartesian.x
R1eta eta(R1) R1 Residual in Y direction deg stat.fit.residual;pos.eq.dec;arith.diff
B2mag mag(B2) Second blue magnitude (B2) mag phot.mag;em.opt.B
B2S B2s B2 Survey code N/A meta.id
B2f B2 field# B2 Field number in survey N/A obs.field
B2sg B2 star/gal. B2 Star/galaxy separation, A=Galaxy, L=Star N/A src.class.starGalaxy
B2xi xi(B2) B2 Residual in X direction deg stat.fit.residual;pos.cartesian.x
B2eta eta(B2) B2 Residual in Y direction deg stat.fit.residual;pos.eq.dec;arith.diff
R2mag mag(R2) Second red magnitude (R2) mag phot.mag;em.opt.R
R2S R2s R2 Survey code N/A meta.id
R2f R2 field# R2 Field number in survey N/A obs.field
R2sg R2 star/gal. R2 Star/galaxy separation, A=Galaxy, L=Star N/A src.class.starGalaxy
R2xi xi(R2) R2 Residual in X direction deg stat.fit.residual;pos.cartesian.x
R2eta eta(R2) R2 Residual in Y direction deg stat.fit.residual;pos.eq.dec;arith.diff
Imag mag(I) Infrared (N) magnitude mag phot.mag;em.opt.I
I_S I_s I Survey code N/A meta.id
If I field# I Field number in survey N/A obs.field
Isg I star/gal. I Star/galaxy separation, A=Galaxy, L=Star N/A src.class.starGalaxy
Ixi xi(I) I Residual in X direction deg stat.fit.residual;pos.cartesian.x
Ieta eta(I) I Residual in Y direction deg stat.fit.residual;pos.eq.dec;arith.diff

Columns that are parts of indices are marked like this.

Other

The following services may use the data contained in this table:

VOResource

VO nerds may sometimes need VOResource XML for this table.

Notes

Note *
M = Existence in a proper motion catalog,
s = object on a diffraction spike,
Y = Correlation with YS4.0 catalog (Monet, in prep.)

More Information on the Base Resource

This is the data table of USNO-B. Note that this data set is huge, and usually your queries will time out unless you specify a spatial region to search in.

The spurious detections listed by Barron et al (2008), http://adsabs.harvard.edu/abs/2008AJ....135..414B, have been removed, albeit with somewhat generous match radius, so 17327425 rows rather than 17224285 were deleted.

Note that the star/galaxy separation flag frequently is >11 and !=19, which should not be the case according to the documentation. We left it this way.

Surveys have been mappend onto characters, with A being the first blue survey. The survey 9 is mapped to survey 8 (i.e., H).

Copyright and such: This service uses code provided by Astrometry.net. For more details visit http://astrometry.net. The field metadata were, in part, taken from CDS' Vizier service.