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Information on Service 'Sample Image Access for ALMA FITS'

The resource contains the recommendations and requirements for ALMA FITS products of the Inter-ARC ALMA Science Archive Working Group (ASAWG) with the view to including a metadataset that is complete and easily accessible by the ChiVO Data Provider (CDP).

For a list of all services and tables belonging to this service's resource, see Information on resource 'ChiVO Data Provider for ALMA FITS'

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, gavo means it is within GAVO's service 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
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) deg 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
POS Position ICRS Position, RA,DEC decimal degrees (e.g., 234.234,-32.46) deg pos.eq
SIZE Field size Size in decimal degrees (e.g., 0.2 or 1,0.1) deg 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.

Name Table Head Description Unit UCD
access_url URL Download. URL of the data file. N/A meta.ref.url;meta.main
file_name Name File Name of the file FITS. N/A meta.id;meta.file;meta.main
mous MOUS Member observing unit set status uid. N/A meta.mous;meta.main
naxis NAXIS Number of axes in the associated data array. N/A pos.wcs.naxis;meta.main
naxisn NAXISn Number of elements along axis n of a data array (n = 1-NAXIS). ASA data must have four NAXIS terms. N/A pos.wcs.naxisn;meta.main
obsgeo_x OBSGEO-X X−coordinate in cartesian geocentric terrestrial reference frame, specifying the location the observation took place at time given in MJD-AVG. N/A pos.cartesian.x;meta.main
obsgeo_y OBSGEO-Y Y−coordinate in cartesian geocentric terrestrial reference frame, specifying the location the observation took place at time given in MJD-AVG. N/A pos.cartesian.y;meta.main
obsgeo_z OBSGEO-Z Z−coordinate in cartesian geocentric terrestrial reference frame, specifying the location the observation took place at time given in MJD-AVG. N/A pos.cartesian.y;meta.main
s_dec DEC The Declination coordinate of image center, in the in the system specified in EQUINOX and RADESYS. N/A pos.eq.dec;meta.main
s_ra RA The Right Ascension coordinate of image center, in the system specified in EQUINOX and RADESYS. N/A pos.eq.ra;meta.main
target_name Target Name Name for source observed. N/A meta.id;meta.main

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.

Name Table Head DescriptionUnit UCD Verb. Level
centerAlpha Ctr. RA Approximate center of image, RA deg POS_EQ_RA_MAIN 0
centerDelta Ctr. Dec Approximate center of image, Dec deg POS_EQ_DEC_MAIN 0
imageTitle Title Synthetic name of the image N/A VOX:Image_Title 0
dateObs Obs. date Epoch at midpoint of observation d VOX:Image_MJDateObs 0
access_url URL Download. URL of the data file. N/A meta.ref.url;meta.main 1
accref Product key Access key for the data N/A N/A 1
target_name Target Name Name for source observed. N/A meta.id;meta.main 10
file_name Name File Name of the file FITS. N/A meta.id;meta.file;meta.main 10
s_ra RA The Right Ascension coordinate of image center, in the system specified in EQUINOX and RADESYS. N/A pos.eq.ra;meta.main 10
s_dec DEC The Declination coordinate of image center, in the in the system specified in EQUINOX and RADESYS. N/A pos.eq.dec;meta.main 10
naxis NAXIS Number of axes in the associated data array. N/A pos.wcs.naxis;meta.main 10
naxisn NAXISn Number of elements along axis n of a data array (n = 1-NAXIS). ASA data must have four NAXIS terms. N/A pos.wcs.naxisn;meta.main 10
bandpassId Bandpass Freeform name of the bandpass used N/A VOX:BandPass_ID 10
date_obs DATE-OBS Observation start time. N/A time.epoch;meta.main 10
specsys SPECSYS Reference frame for freq axis. N/A pos.eq.specsys;meta.main 10
radesys RADESYS Name of the reference frame of equatorial or ecliptic coordinates. N/A pos.eq.radesys;meta.main 10
restfrq RESTFRQ Contingent on the type of measurements being made: For transition line measurements: the rest frequency of the of the spectral feature of interest in Hz. For continuum measurements: the centre of the band of the spectral window. N/A pos.eq.restfrq;meta.main 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/pix VOX:Image_Scale 12
mous MOUS Member observing unit set status uid. N/A meta.mous;meta.main 15
obsgeo_x OBSGEO-X X−coordinate in cartesian geocentric terrestrial reference frame, specifying the location the observation took place at time given in MJD-AVG. N/A pos.cartesian.x;meta.main 15
obsgeo_y OBSGEO-Y Y−coordinate in cartesian geocentric terrestrial reference frame, specifying the location the observation took place at time given in MJD-AVG. N/A pos.cartesian.y;meta.main 15
obsgeo_z OBSGEO-Z Z−coordinate in cartesian geocentric terrestrial reference frame, specifying the location the observation took place at time given in MJD-AVG. N/A pos.cartesian.y;meta.main 15
instId Instrument Identifier of the originating instrument N/A INST_ID 15
pixelSize Axes Lengths Number of pixels along each of the axes pix VOX:Image_Naxis 15
gous GOUS Group observing unit set status uid. N/A meta.gous;meta.main 15
lonpole LONPOLE Longitude in the coordinate system of celestial system’s north pole. N/A meta.lonpole;meta.main 15
latpole LATPOLE Latitude in the coordinate system of celestial system’s north pole. N/A meta.latpole;meta.main 15
instrument_name INSTRUME The receiver band used for the image observations. N/A meta.id;instr;meta.main 15
mime Type MIME type of the file served N/A N/A 20
nAxes #axes Number of axes in data N/A VOX:Image_Naxes 20
refFrame Ref. Frame Coordinate system reference frame N/A VOX:STC_CoordRefFrame 20
wcs_equinox Equinox Equinox of the given coordinates yr VOX:STC_CoordEquinox 20
wcs_projection Proj. FITS WCS projection type N/A VOX:WCS_CoordProjection 20
wcs_refPixel Ref. pixel WCS reference pixel pix VOX:WCS_CoordRefPixel 20
wcs_refValues Ref. values World coordinates at WCS reference pixel deg VOX:WCS_CoordRefValue 20
wcs_cdmatrix CD matrix FITS WCS CDij matrix deg/pix VOX:WCS_CDMatrix 20
bandpassUnit Bandpass unit Unit of bandpass specifications (always m). N/A VOX:BandPass_Unit 20
bandpassRefval Band Ref. Characteristic quantity for the bandpass of the image m VOX:BandPass_RefValue 20
bandpassHi Band upper Upper limit of the bandpass (in BandPass_Unit units) m VOX:BandPass_HiLimit 20
bandpassLo Band lower Lower limit of the bandpass (in BandPass_Unit units) m VOX:BandPass_LoLimit 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 VOX:Image_PixFlags 20
coverage Coverage Field covered by the image deg N/A 20
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

Copyright, License, Acknowledgements

MIT License.

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