Information on Service 'Bochum Galactic Disk Survey (BGDS) images'

The Bochum Galactic Disk Survey is an ongoing project to monitor the stellar content of the Galactic disk in a 6 degree wide stripe centered on the Galactic plane. The data has been recorded since mid-2010 in Sloan r and i simultaneously with the RoBoTT Telecsope at the Universitaetssternwarte Bochum near Cerro Armazones in the Chilean Atacama desert. It contains measurements of about 2x10^7 stars over more than seven years. Additionally, intermittent measurements in Johnson UVB and Sloan z have been recorded as well.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Bochum Galactic Disk Survey BGDS'

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.

Other services provided on the underlying data include:

Spatial Coverage

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
bandpassId Bandpass Freeform name of the bandpass used N/A instr.bandpass
dateObs Obs. date Epoch at midpoint of observation d time;obs.exposure
field Field Survey field observed. N/A meta.id;obs.field
FORMAT Output format Requested format of the image data N/A N/A
hFORMAT Output 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
INTERSECT Intersection type Relation of image and specified Region of Interest. N/A N/A
maxrec Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
POS Position ICRS Position, RA,DEC decimal degrees (e.g., 234.234,-32.46) N/A pos.eq
responseformat Output Format File format requested for output. N/A meta.code.mime
SIZE Field size Size in decimal degrees (e.g., 0.2 or 1,0.1) 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

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
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
bandpassHi Band upper Upper limit of the bandpass (in BandPass_Unit units) m instr.bandpass;stat.max
bandpassId Bandpass Freeform name of the bandpass used N/A instr.bandpass
bandpassLo Band lower Lower limit of the bandpass (in BandPass_Unit units) m instr.bandpass;stat.min
bandpassRefval Band Ref. Characteristic quantity for the bandpass of the image m instr.bandpass;stat.median
bandpassUnit Bandpass unit Unit of bandpass specifications (always m). N/A N/A
centerAlpha Ctr. RA Approximate center of image, RA deg pos.eq.ra
centerDelta Ctr. Dec Approximate center of image, Dec deg pos.eq.dec
coverage Coverage Field covered by the image deg N/A
dateObs Obs. date Epoch at midpoint of observation d time;obs.exposure
exposure Exp. time Effective exposure time (sum of exposure times of all images contributing here). s time.duration;obs.exposure
field Field Survey field observed. N/A meta.id;obs.field
imageTitle Title Synthetic name of the image N/A meta.title
instId Instrument Identifier of the originating instrument N/A meta.id;instr
mime Type MIME type of the file served N/A meta.code.mime
nAxes #axes Number of axes in data N/A pos.wcs.naxes
pixelScale Scales The pixel scale on each image axis deg/pixel pos.wcs.scale
pixelSize Axes Lengths Number of pixels along each of the axes pixel pos.wcs.naxis
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
pub_did P. DID Dataset identifier assigned by the publisher N/A meta.id;meta.main
refFrame Ref. Frame Coordinate system reference frame N/A pos.frame
wcs_cdmatrix CD matrix FITS WCS CDij matrix deg/pixel pos.wcs.cdmatrix
wcs_equinox Equinox Equinox of the given coordinates yr time.equinox
wcs_projection Proj. FITS WCS projection type N/A pos.wcs.ctype
wcs_refPixel Ref. pixel WCS reference pixel pixel pos.wcs.crpix
wcs_refValues Ref. values World coordinates at WCS reference pixel deg pos.wcs.crval

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
bandpassId Bandpass Freeform 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
field Field Survey field observed. N/A meta.id;obs.field 15
exposure Exp. time Effective exposure time (sum of exposure times of all images contributing here). s time.duration;obs.exposure 15
pub_did P. DID Dataset identifier assigned by the publisher N/A meta.id;meta.main 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
airmass Airmass Airmass at mean epoch N/A obs.airMass 21
owner Owner Owner of the data N/A N/A 25
embargo Embargo ends Date the data will become/became public a N/A 25
moondist Moon dist. Moon distance at mean epoch deg obs.param 25

If you use GDS data, please cite 2015AN....336..590H.

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