Information on Service 'Potsdam Kapteyn Plates Web Service'

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Further access options are discussed below

In the context of Kapteyn's plan to obtain a photometric standard, in Potsdam more than 400 photographic plates of several Selected Areas, Special Areas, and Kapteyn-Pritchard areas were obtained between 1910 and 1933, both as direct images and with an object prism. This service provides FITS images of the science area of the plates as well as images of the entire plates, including previous markings.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Potsdam Kapteyn Series Plates'

Overview

You can access this service using:

Coverage

Intervals of messenger energies reflected in this resource: 2.38431 3.26274 eV

Time covered by this resource's data: 1910.53 1933.23

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.

Other services provided on the underlying data include:

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
dateObs Obs. date Epoch at midpoint of observation d time;obs.exposure
hFORMAT Image format Requested format of the image data N/A N/A
hINTERSECT Intersection type Relation of image and specified Region of Interest. N/A N/A
hPOS Position ICRS Position, RA,DEC, or Simbad object (e.g., 234.234,-32.45) N/A pos.eq
hSIZE Field size Size in decimal degrees (e.g., 0.2 or 1,0.1) deg N/A
object Targ. Obj. Special object on plate. 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
_r Dist. Distance to the search center deg pos.distance
acc4 Scaled 1/4 Original plate scaled to 25%. N/A meta.ref.url
accref Product key Access key for the data N/A meta.ref.url
accsize File size Size of the data in bytes byte VOX:Image_FileSize
centerAlpha Ctr. RA Approximate center of image, RA deg pos.eq.ra
centerDelta Ctr. Dec Approximate center of image, Dec deg pos.eq.dec
datalink DL URL of a datalink document for this dataset. N/A meta.ref.url
dateObs Obs. date Epoch at midpoint of observation d time;obs.exposure
exposure Exp. time Effective exposure time. s time.duration;obs.exposure
imageTitle Title Synthetic name of the image N/A meta.title
instId Instrument Identifier of the originating instrument N/A meta.id;instr
object Targ. Obj. Special object on plate. N/A meta.id
platephoto Photo Image of the plate including border and other markings. N/A meta.ref.url
wfpdb_id WFPDB Plate identifier as in the WFPDB. 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
centerAlpha Ctr. RA Approximate center of image, RA deg pos.eq.ra 0
centerDelta Ctr. Dec Approximate center of image, Dec deg pos.eq.dec 0
imageTitle Title Synthetic name of the image N/A meta.title 0
dateObs Obs. date Epoch at midpoint of observation d time;obs.exposure 0
accref Product key Access key for the data N/A meta.ref.url 1
pub_did Pub. DID Dataset identifier assigned by the publisher. N/A meta.ref.url 5
bandpassId Bandpass Free-form name of the bandpass used N/A instr.bandpass 10
accsize File size Size of the data in bytes byte VOX:Image_FileSize 11
pixelScale Scales The pixel scale on each image axis deg/pixel pos.wcs.scale 12
instId Instrument Identifier of the originating instrument N/A meta.id;instr 15
pixelSize Axes Lengths Number of pixels along each of the axes pixel pos.wcs.naxis 15
exposure Exp. time Effective exposure time. s time.duration;obs.exposure 15
object Targ. Obj. Special object on plate. N/A meta.id 15
start_time Start UT at start of exposure. d time.start;obs 15
end_time End UT at end of exposure. d time.end;obs 15
wfpdb_id WFPDB Plate identifier as in the WFPDB. N/A meta.id 15
platephoto Photo Image of the plate including border and other markings. N/A meta.ref.url 15
mime Type MIME type of the file served N/A meta.code.mime 20
nAxes #axes Number of axes in data N/A pos.wcs.naxes 20
refFrame Ref. Frame Coordinate system reference frame N/A pos.frame 20
wcs_equinox Equinox Equinox of the given coordinates yr time.equinox 20
wcs_projection Proj. FITS WCS projection type N/A pos.wcs.ctype 20
wcs_refPixel Ref. pixel WCS reference pixel pixel pos.wcs.crpix 20
wcs_refValues Ref. values World coordinates at WCS reference pixel deg pos.wcs.crval 20
wcs_cdmatrix CD matrix FITS WCS CDij matrix deg/pixel pos.wcs.cdmatrix 20
bandpassUnit Bandpass unit Unit of bandpass specifications (always m). N/A N/A 20
bandpassRefval Band Ref. Characteristic quantity for the bandpass of the image m instr.bandpass;stat.median 20
bandpassHi Band upper Upper limit of the bandpass (in BandPass_Unit units) m instr.bandpass;stat.max 20
bandpassLo Band lower Lower limit of the bandpass (in BandPass_Unit units) m instr.bandpass;stat.min 20
pixflags P. Flags Flags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display only N/A meta.code 20
coverage Coverage Field covered by the image deg N/A 20
_r Dist. Distance to the search center deg pos.distance 20
airmass Airmass Airmass at mean epoch. N/A obs.airMass 21
observer Observer Observer. N/A obs.observer 21
owner Owner Owner of the data N/A N/A 25
embargo Embargo ends Date the data will become/became public yr N/A 25

Citation Info

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