Table information for 'usnob.plates'

General

Table Description: Plate data for the source plates of USNO-B

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

Resource Description: This table contains the metadata for the plates that went into USNO-B 1.0 as best as we can reconstruct it (i.e., largely those that also make up the Digital Sky Survey DSS). Most of the source files were obtained from http://www.nofs.navy.mil/data/fchpix/, some additional contributions came from Dave Monet.

For a list of all services and tables belonging to this table's resource, see Information on resource 'Plate data for the USNO-B 1.0 Catalogue.'

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.

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

@MISC{vo:usnob_plates,
  year=2009,
  title={Plate data for the {USNO}-B 1.0 Catalogue.},
  author={{GAVO} Data Center},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/usnob.plates},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Table Documentation

This table contains the metadata for the plates that went into USNO-B 1.0 as best as we can reconstruct it. Most of the source files were obtained from http://www.nofs.navy.mil/data/fchpix/, some additional contributions came from Dave Monet.

Note that, in Dave's words in 2003AJ....125..984M, “some confusion persists” in plate numbering and assignment. We found this to be true.

Here is the assignment we have figured out so far:

Survey name USNO We
POSS-I O 0 A
POSS-I E 1 B
POSS-II J 2 C
POSS-II F 3 D
SERC-J 4 E
SERC-EJ 4 E
ESO-R 5 F
SERC-ER 5 F
AAO-R 6 G
POSS-II-N 7 H
SERC-I, non-POSS 8 I
SERC-I, POSS-II-N 9 ? -- does not exist in USNO data
POSS-II, marked with UJ ? X

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
field Field# Field number in survey N/A obs.field
plate Plate# Plate number in USNO-B N/A obs.field;meta.main
survey Survey ID Survey identifier, see long docs N/A meta.id
epoch Epoch Plate epoch yr time.epoch
emulsion Emulsion Emulsion N/A instr.plate.emulsion
filter Filter Filter N/A instr.filter
exposure Exposure Length of exposure s time.duration;obs.exposure
usnocode USNO code 2-char plate code given in the plate catalogue N/A meta.code;obs.field
alpha1950 Ctr. RA B1950 Field center alpha for B1950 deg pos.eq.ra
delta1950 Ctr. Dec B1950 Field center decl for B1950 deg pos.eq.dec
alpha2000 Ctr. RA J2000 Field center alpha for J2000 deg pos.eq.ra;meta.main
delta2000 Ctr. Dec J2000 Field center decl for J2000 deg pos.eq.dec;meta.main
src Source Source file for this record N/A meta.ref;meta.file
alphaMin1950 min. RA B1950 N/A deg stat.min;pos.eq.ra
alphaMax1950 max. RA B1950 N/A deg stat.max;pos.eq.ra
deltaMin1950 min. Dec B1950 N/A deg stat.min;pos.eq.dec
deltaMax1950 max. Dec B1950 N/A deg stat.max;pos.eq.dec

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.