Table information for 'urat1.main'

General

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

Resource Description:

URAT1 is an observational catalog at a mean epoch between 2012.3 and 2014.6; ot covers the magnitude range 3 to 18.5 in R-band, with a positional precision of 5 to 40 mas. It covers most of the northern hemisphere and some areas down to -24.8° in declination.

In the GAVO data center, we left out all columns originating from cross matches with other catalogs; on-the fly crossmatches can be done in our TAP service.

For a list of all services and tables belonging to this table's resource, see Information on resource 'The first U.S. Naval Observatory Astrometric Robotic Telescope Catalog URAT1 star catalog'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2015AAS...22543301Z (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:urat1_main,
  year=2015,
  title={The first U.S. Naval Observatory Astrometric Robotic Telescope Catalog
{URAT1} star catalog},
  author={Zacharias, N.; Finch, C.; Subasavage, J.; Bredthauer, G.; Crockett,
C.; Divittorio, M.; Furguson, E.; Harris, F.; Harris, H.; Henden, A.;
Kilian, C.; Munn, J.; Rafferty, T.; Rhodes, A.; Schultheiss, M.;
Tilleman, T.; Wieder, G.},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/urat1.main},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
id ID URAT1 recommended identifier (ZZZ-NNNNNN) N/A meta.id;meta.main
raj2000 RA Right ascension on ICRS, at Epoch [Note 1] deg pos.eq.ra;meta.main
dej2000 Dec Declination on ICRS, at Epoch [Note 1] deg pos.eq.dec;meta.main
pos_err_scatter Err. scat. Position error per coordinate, from scatter deg stat.error;pos
pos_err_model Err. mod. Position error per coordinate, from model deg stat.error;pos
epoch Epoch Mean URAT observation epoch yr time.epoch
mag Mag Mean URAT model fit magnitude (between R and I) [Note 4] mag phot.mag;em.opt.R
e_mag Err. Mag Error in URAT model fit magnitude, derived from the scatter of individual observations, plus a floor of 0.01. mag stat.error;phot.mag;em.opt.R
n_sets #sets Total number of images (observations) [Note 3] N/A meta.number;obs
n_sets_pos #sets pos Number of sets used for mean position [Note 3] N/A meta.number;obs
n_sets_mag #sets mag Number of sets used for URAT magnitude [Note 3] N/A meta.number;obs
refstar Ref? Largest reference star flag [Note 6] N/A meta.code.qual
n_im #Obs Total number of images (observations) N/A meta.number;obs
n_im_used #Obs used Number of images used for mean position N/A meta.number;obs
n_grating #Grating Total number of 1st order grating observations N/A meta.number;obs
n_grating_used #Grating used Number of 1st order grating positions used N/A meta.number;obs

Columns that are parts of indices are marked like this.

VOResource

VO nerds may sometimes need VOResource XML for this table.

Notes