Information on Service 'Wide-Field Plate Database WFPDB'

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The Wide-Field Plate Database (WFPDB) contains the descriptive information for the astronomical wide-field (>1°) photographic observations stored in numerous archives all over the world. The total number of these observations, obtained since the end of the 19th century with more then 200 instruments (telescopes) is about 2 550 000 from 509 archives.

The WFPDB is continually being updated, providing currently access to the information for about 640 000 plates from 117 plate archives (30% of the estimated total number of wide-field plates)

For a list of all services and tables belonging to this service's resource, see Information on resource 'Wide-Field Plate Database WFPDB'

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
epoch Obs. Epoch Epoch of observation start (UT) yr time.epoch
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
MAXREC Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
object Object Object or field name as given by observer N/A meta.id;src
object_type Type Type of the target object N/A meta.class;src
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
RESPONSEFORMAT Output Format File format requested for output. N/A meta.code.mime
SR Search Radius Search radius deg N/A
VERB Verbosity Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns. N/A N/A
waveband Band Spectral Band N/A instr.bandpass
wfpdbid Wfpdbid WFPDB identifier of the plate, consisting of an observatory identifier, the instrument aperture, an instrument suffix, a plate number, and a suffix to it. N/A meta.id;meta.main

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
_r Dist. Distance to cone center deg pos.distance
availability Availability Free text on how to find the plate. N/A meta.note
coord_problem Coords? Quality flag for the coordinates (empty means no known problems) N/A meta.note
dej2000 Dec Declination of the plate center (ICRS) Note p deg pos.eq.dec;meta.main
digitization Digitization Information on possible ways to access plate scans in free text. N/A meta.note
emulsion Emulsion Emulsion type N/A instr.plate.emulsion
epoch Obs. Epoch Epoch of observation start (UT) yr time.epoch
exptime Exp. Time Exposure time (for multiple exposures, this is for the first exposure; for the others, see notes) s time.duration;obs.exposure
filter Filter Filter type N/A meta.id;instr.filter
instr_id Instr. WFPDB instrument identifier. TDB: Foreign key N/A meta.id;instr
method Method Method of observation N/A instr.setup
notes Notes Various longer remarks N/A meta.note
object Object Object or field name as given by observer N/A meta.id;src
object_type Type Type of the target object N/A meta.class;src
observer Observer Name(s) of the persons having performed the observation. N/A obs.observer
quality Quality Quality-related information in free text. N/A meta.note
raj2000 RA Right ascension of the plate center (ICRS) Note p deg pos.eq.ra;meta.main
time_problem Epoch? Quality flag for the epoch (empty means no known problems) N/A meta.note
waveband Band Spectral Band N/A instr.bandpass
wfpdbid Wfpdbid WFPDB identifier of the plate, consisting of an observatory identifier, the instrument aperture, an instrument suffix, a plate number, and a suffix to it. N/A meta.id;meta.main
xsize Width Width of the plate cm phys.size;instr.det
ysize Height Height of the plate cm phys.size;instr.det

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
wfpdbid Wfpdbid WFPDB identifier of the plate, consisting of an observatory identifier, the instrument aperture, an instrument suffix, a plate number, and a suffix to it. N/A meta.id;meta.main 1
raj2000 RA Right ascension of the plate center (ICRS) Note p deg pos.eq.ra;meta.main 1
dej2000 Dec Declination of the plate center (ICRS) Note p deg pos.eq.dec;meta.main 1
epoch Obs. Epoch Epoch of observation start (UT) yr time.epoch 1
object Object Object or field name as given by observer N/A meta.id;src 5
_r Dist. Distance to cone center deg pos.distance 10
instr_id Instr. WFPDB instrument identifier. TDB: Foreign key N/A meta.id;instr 15
coord_problem Coords? Quality flag for the coordinates (empty means no known problems) N/A meta.note 15
time_problem Epoch? Quality flag for the epoch (empty means no known problems) N/A meta.note 15
object_type Type Type of the target object N/A meta.class;src 15
method Method Method of observation N/A instr.setup 15
exptime Exp. Time Exposure time (for multiple exposures, this is for the first exposure; for the others, see notes) s time.duration;obs.exposure 15
emulsion Emulsion Emulsion type N/A instr.plate.emulsion 15
filter Filter Filter type N/A meta.id;instr.filter 15
waveband Band Spectral Band N/A instr.bandpass 15
notes Notes Various longer remarks N/A meta.note 15
quality Quality Quality-related information in free text. N/A meta.note 15
xsize Width Width of the plate cm phys.size;instr.det 23
ysize Height Height of the plate cm phys.size;instr.det 23
observer Observer Name(s) of the persons having performed the observation. N/A obs.observer 23
availability Availability Free text on how to find the plate. N/A meta.note 25
digitization Digitization Information on possible ways to access plate scans in free text. N/A meta.note 25

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

Note p

Positions are from the observatory logs where a plate solution is not available. They are taken from empirical plate solutions otherwise.