Information on Service 'GAMA DR3 spectra'

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Spectra from the third data release (DR3) of GAMA.

For a list of all services and tables belonging to this service's resource, see Information on resource 'GAMA-DR3 Spectra'

Service Documentation

GAMA (Galaxy And Mass Assembly) is a joint European-Australasian project based on spectroscopic observations using the AAOmega multi-object spectrograph on the Anglo-Australian Telescope (AAT).

This resource contains the spectra from the third data release of GAMA, for more information, please visit the GAMA web site [1].

Notes

We ingested all the spectra from the SpecAll.fits table (i.e. not the rows with xxx as URL) except 7 files that did not contain actual spectra; these are the SDSS spectra with SPECID 318630249967413248, 318630524845320192, 318715736996472832, 318800674269718528, 340069354064340992, 369430722538137600, and 601252573990643712.

This leads to 214 341 available spectra.

We also added to the spectra the IS_BEST and IS_SBEST information from the SpecAll.fits table from the GAMA web site.

The SSAP response contains this columns: spectral, flux, error, flux_nocalib, error_nocalib, and sky. Nevertheless, not all spectra contain all the information, in particular the calibrated flux is not available everywhere.

ACKNOWLEDGEMENTS

GAMA is a joint European-Australasian project based around a spectroscopic campaign using the Anglo-Australian Telescope. The GAMA input catalogue is based on data taken from the Sloan Digital Sky Survey and the UKIRT Infrared Deep Sky Survey. Complementary imaging of the GAMA regions is being obtained by a number of independent survey programmes including GALEX MIS, VST KiDS, VISTA VIKING, WISE, Herschel-ATLAS, GMRT and ASKAP providing UV to radio coverage. GAMA is funded by the STFC (UK), the ARC (Australia), the AAO, and the participating institutions. The GAMA website is http://www.gama-survey.org/ .

Please also visit the GAMA acknowledgements page [2].

[1]http://www.gama-survey.org/
[2]http://www.gama-survey.org/pubs/ack.php

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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
cataid CataId ID of the matched GAMA object N/A meta.id
specid SpecId Unique ID of the spectrum N/A meta.id
ssa_location Location ICRS location of aperture center deg pos.eq
ssa_redshift z Redshift of target object N/A src.redshift
ssa_targname Object Common name of object observed. N/A meta.id;src

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;meta.dataset
cataid CataId ID of the matched GAMA object N/A meta.id
datalink Datalink A link to a datalink document for this spectrum. N/A meta.ref.url
is_best Is Best Spectrum with best redshift for this object? N/A meta.code
location_dec Dec N/A deg pos.eq.dec;meta.main
location_ra RA N/A deg pos.eq.ra;meta.main
mime Type MIME type of the file served N/A meta.code.mime
specid SpecId Unique ID of the spectrum N/A meta.id
ssa_specend Band end Upper value of spectral coordinate m em.wl;stat.max
ssa_specstart Band start Lower value of spectral coordinate m em.wl;stat.min
ssa_targname Object Common name of object observed. N/A meta.id;src

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
accref Product key Access key for the data N/A meta.ref.url;meta.dataset 1
specid SpecId Unique ID of the spectrum N/A meta.id 1
cataid CataId ID of the matched GAMA object N/A meta.id 1
is_best Is Best Spectrum with best redshift for this object? N/A meta.code 1
is_sbest Is SBest Spectrum with best redshift for this object in originating survey? N/A meta.code 1
ssa_location Location ICRS location of aperture center deg pos.eq 5
ssa_dateObs Date Obs. Midpoint of exposure (MJD) d time.epoch 5
ssa_timeExt Exp. Time Exposure duration s time.duration 5
ssa_length Length Number of points in the spectrum N/A N/A 5
accsize File size Size of the data in bytes byte N/A 11
ssa_dstitle Title A compact and descriptive designation of the dataset. N/A meta.title;meta.dataset 15
ssa_creatorDID C. DID Dataset identifier assigned by the creator N/A meta.id 15
ssa_pubDID P. DID Dataset identifier assigned by the publisher N/A meta.ref.ivoid 15
ssa_cdate Proc. Date Processing/Creation date N/A time;meta.dataset 15
ssa_pdate Pub. Date Date last published. N/A N/A 15
ssa_bandpass Bandpass Bandpass (i.e., rough spectral location) of this dataset; this should be the most appropriate term from the vocabulary http://www.ivoa.net/rdf/messenger. N/A instr.bandpass 15
ssa_cversion C. Version Creator assigned version for this dataset (will be incremented when this particular item is changed). N/A meta.version;meta.dataset 15
ssa_targname Object Common name of object observed. N/A meta.id;src 15
ssa_targclass Ob. cls Object class (star, QSO,...; use Simbad object classification http://simbad.u-strasbg.fr/simbad/sim-display?data=otypes if at all possible) N/A src.class 15
ssa_redshift z Redshift of target object N/A src.redshift 15
ssa_targetpos Obj. pos Equatorial (ICRS) position of the target object. N/A pos.eq;src 15
ssa_snr SNR Signal-to-noise ratio estimated for this dataset N/A stat.snr 15
ssa_aperture Aperture Angular diameter of aperture deg phys.angSize;instr.fov 15
ssa_specmid Mid. Band Midpoint of region covered in this dataset m instr.bandpass 15
ssa_specext Bandwidth Width of the spectrum m instr.bandwidth 15
ssa_specstart Band start Lower value of spectral coordinate m em.wl;stat.min 15
ssa_specend Band end Upper value of spectral coordinate m em.wl;stat.max 15
ssa_csysName Sys System RA and Dec are given in N/A N/A 15
ssa_spectralucd UCD(spectral) UCD of the spectral column in the spectra served; when you have wavelengths, use em.wl for vacuum wavelengths, em.wl;obs.atmos for air wavelengths. N/A meta.ucd 15
ssa_spectralunit unit(spectral) Unit of the spectral column N/A meta.unit 15
ssa_fluxucd UCD(flux) UCD of the flux column N/A meta.ucd 15
ssa_fluxunit unit(flux) Unit of the flux column N/A meta.unit 15
ssa_publisher Publisher Publisher of the datasets included here. N/A meta.curation 15
ssa_creator Creator Creator of the datasets included here. N/A N/A 15
ssa_collection Collection A short handle naming the collection this spectrum belongs to. N/A N/A 15
ssa_instrument Instrument Instrument or code used to produce these datasets N/A meta.id;instr 15
ssa_datasource Src Method of generation for the data (one of survey, pointed, theory, custom, artificial). N/A N/A 15
ssa_creationtype Using Process used to produce the data (archival, cutout, filtered, mosaic, projection, spectralExtraction, or catalogExtraction) N/A N/A 15
ssa_reference Ref. URL or bibcode of a publication describing this data. N/A meta.bib.bibcode 15
ssa_fluxStatError Err. flux Statistical error in flux N/A stat.error;phot.flux.density;em 15
ssa_fluxSysError Sys. Err flux Systematic error in flux N/A stat.error.sys;phot.flux.density;em 15
ssa_fluxcalib Calib Flux Type of flux calibration (ABSOLUTE, CALIBRATED, RELATIVE, NORMALIZED, or UNCALIBRATED). N/A N/A 15
ssa_binSize Spect. Bin Bin size in wavelength m em.wl;spect.binSize 15
ssa_spectStatError Err. Spect Statistical error in wavelength m stat.error;em 15
ssa_spectSysError Sys. Err. Spect Systematic error in wavelength m stat.error.sys;em 15
ssa_speccalib Calib. Spect. Type of wavelength calibration N/A meta.code.qual 15
ssa_specres Spec. Res. Resolution (in meters of wavelength) on the spectral axis m spect.resolution;em.wl 15
ssa_spaceError Err. Spc Statistical error in position deg stat.error;pos.eq 15
ssa_spaceCalib Calib. Spc Type of calibration in spatial coordinates N/A meta.code.qual 15
ssa_spaceRes Res. Spc Spatial resolution of data deg pos.angResolution 15
datalink Datalink A link to a datalink document for this spectrum. N/A meta.ref.url 15
mime Type MIME type of the file served N/A meta.code.mime 20
ssa_model Model Data model name and version N/A N/A 20
ssa_timeSI [Time] Time conversion factor in Osuna-Salgado convention. N/A N/A 20
ssa_spectralSI [Spectral] Spectral conversion factor in Osuna-Salgado convention N/A N/A 20
ssa_fluxSI [Flux] Flux/magnitude conversion factor in Osuna-Salgado convention N/A N/A 20
ssa_dstype Data type Type of data (spectrum, time series, etc) N/A 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

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