Information on Service 'USNO-B1 plates'

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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 service's resource, see Information on resource 'Plate data for the USNO-B 1.0 Catalogue.'

Overview

You can access this service using:

This service is published as follows:

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
DEC Delta (ICRS) Declination (ICRS decimal) deg pos.eq.dec
emulsion Emulsion Emulsion N/A instr.plate.emulsion
field Field# Field number in survey N/A obs.field
hscs_pos Position/Name Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object N/A N/A
hscs_sr Search radius Search radius in arcminutes N/A N/A
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
SR Search Radius Search radius deg N/A
survey Survey ID Survey identifier, see long docs N/A meta.id

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
alpha2000 Ctr. RA J2000 Field center alpha for J2000 deg pos.eq.ra;meta.main
alphaMax1950 max. RA B1950 N/A deg stat.max;pos.eq.ra
alphaMin1950 min. RA B1950 N/A deg stat.min;pos.eq.ra
delta2000 Ctr. Dec J2000 Field center decl for J2000 deg pos.eq.dec;meta.main
deltaMax1950 max. Dec B1950 N/A deg stat.max;pos.eq.dec
deltaMin1950 min. Dec B1950 N/A deg stat.min;pos.eq.dec
emulsion Emulsion Emulsion N/A instr.plate.emulsion
epoch Epoch Plate epoch yr time.epoch
field Field# Field number in survey N/A obs.field
filter Filter Filter N/A instr.filter
src Source Source file for this record N/A meta.ref;meta.file
survey Survey ID Survey identifier, see long docs N/A meta.id

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
field Field# Field number in survey N/A obs.field 20
plate Plate# Plate number in USNO-B N/A obs.field;meta.main 20
survey Survey ID Survey identifier, see long docs N/A meta.id 20
epoch Epoch Plate epoch yr time.epoch 20
emulsion Emulsion Emulsion N/A instr.plate.emulsion 20
filter Filter Filter N/A instr.filter 20
exposure Exposure Length of exposure s time.duration;obs.exposure 20
usnocode USNO code 2-char plate code given in the plate catalogue N/A meta.code;obs.field 20
alpha1950 Ctr. RA B1950 Field center alpha for B1950 deg pos.eq.ra 20
delta1950 Ctr. Dec B1950 Field center decl for B1950 deg pos.eq.dec 20
alpha2000 Ctr. RA J2000 Field center alpha for J2000 deg pos.eq.ra;meta.main 20
delta2000 Ctr. Dec J2000 Field center decl for J2000 deg pos.eq.dec;meta.main 20
src Source Source file for this record N/A meta.ref;meta.file 20
alphaMin1950 min. RA B1950 N/A deg stat.min;pos.eq.ra 20
alphaMax1950 max. RA B1950 N/A deg stat.max;pos.eq.ra 20
deltaMin1950 min. Dec B1950 N/A deg stat.min;pos.eq.dec 20
deltaMax1950 max. Dec B1950 N/A deg stat.max;pos.eq.dec 20

VOResource XML (that's something exclusively for VO nerds)