ivoa.obscoreThis data collection is queryable in GAVO Data Center's obscore table.
lamost6LAMOST DR6 Spectra LAMOST, the The Large Sky Area Multi-Object Fiber Spectroscopic
Telescope (or Guoshoujing Telescope) is an instrument tailored for
producing large number of optical medium- and low-resolution spectra.
Here, we publish both the medium (MRS) and low (LRS) resolution
spectra from Data Release 6, http://dr6.lamost.org/v2/, to the Virtual
Observatory.
lamost6.ssa_mrsSSA-compliant metadata for LAMOST DR6 medium resolution spectra; this
data is also availble through Obscore; the collection name there is
LAMOST6 MRS.5900000accrefAccess key for the datameta.ref.url;meta.datasetssa:Access.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicyrcharnullablemimeMIME type of the file servedmeta.code.mimessa:Access.FormatcharnullableaccsizeSize of the data in bytesbytessa:Access.Size100000100000.0100000.0100000.01000001.0longnullablessa_dstitleA compact and descriptive designation of the dataset.meta.title;meta.datasetssa:DataID.Titlecharssa_creatordidDataset identifier assigned by the creatormeta.idssa:DataID.CreatorDIDcharnullablessa_pubdidDataset identifier assigned by the publishermeta.ref.ivoidssa:Curation.PublisherDIDcharindexednullablessa_cdateProcessing/Creation datetime;meta.datasetssa:DataID.Datecharnullablessa_pdateDate last published.ssa:Curation.Datecharnullablessa_bandpassBandpass (i.e., rough spectral location) of this dataset; this should be the most appropriate term from the vocabulary http://www.ivoa.net/rdf/messenger.instr.bandpassssa:DataID.Bandpasscharnullablessa_cversionCreator assigned version for this dataset (will be incremented when this particular item is changed).meta.version;meta.datasetssa:DataID.Versioncharnullablessa_targnameCommon name of object observed.meta.id;srcssa:Target.Namecharssa_targclassObject class (star, QSO,...; use Simbad object classification http://simbad.u-strasbg.fr/simbad/sim-display?data=otypes if at all possible)src.classssa:Target.Classcharnullablessa_redshiftRedshift of target objectsrc.redshiftssa:Target.Redshiftfloatnullablessa_targetposEquatorial (ICRS) position of the target object.pos.eq;srcssa:Target.pos.spointdoublenullablessa_snrMedian signal to noise ratio over all pixel, computed as flux/sqrt(variance)stat.snrssa:Derived.SNR0011.97141.799991floatnullablessa_locationICRS location of aperture centerdegpos.eqssa:Char.SpatialAxis.Coverage.Location.Valuedoubleindexednullablessa_apertureAngular diameter of aperturedegphys.angSize;instr.fovssa:Char.SpatialAxis.Coverage.Bounds.Extentfloatnullablessa_dateobsMidpoint of exposure (MJD)dtime.epochssa:Char.TimeAxis.Coverage.Location.Value58024580275811858268582731doubleindexednullablessa_timeextExposure durationstime.durationssa:Char.TimeAxis.Coverage.Bounds.Extentfloatnullablessa_specmidMidpoint of region covered in this datasetminstr.bandpassssa:Char.SpectralAxis.Coverage.Location.Valuefloatnullablessa_specextWidth of the spectrumminstr.bandwidthssa:Char.SpectralAxis.Coverage.Bounds.Extentfloatnullablessa_specstartLower value of spectral coordinatemem.wl;stat.minssa:Char.SpectralAxis.Coverage.Bounds.Start4.91e-074.91e-076.28e-076.28e-076.28e-071floatindexednullablessa_specendUpper value of spectral coordinatemem.wl;stat.maxssa:Char.SpectralAxis.Coverage.Bounds.Stop5.37e-075.37e-076.87e-076.87e-076.87e-071floatindexednullablessa_lengthNumber of points in the spectrumssa:Dataset.Lengthintnullablessa_modelData model name and versionssa:Dataset.DataModelcharssa_csysnameSystem RA and Dec are given inssa:CoordSys.SpaceFrame.Namecharssa_timesiTime conversion factor in Osuna-Salgado convention.ssa:Dataset.TimeSIcharnullablessa_spectralsiSpectral conversion factor in Osuna-Salgado conventionssa:Dataset.SpectralSIcharnullablessa_spectralucdUCD 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.meta.ucdssa:Char.SpectralAxis.Ucdcharssa_spectralunitUnit of the spectral columnmeta.unitssa:Char.SpectralAxis.Unitcharssa_fluxsiFlux/magnitude conversion factor in Osuna-Salgado conventionssa:Dataset.FluxSIcharnullablessa_fluxucdUCD of the flux columnmeta.ucdssa:Char.FluxAxis.Ucdcharssa_fluxunitUnit of the flux columnmeta.unitssa:Char.FluxAxis.Unitcharssa_dstypeType of data (spectrum, time series, etc)ssa:Dataset.Typecharnullablessa_publisherPublisher of the datasets included here.meta.curationssa:Curation.Publishercharssa_creatorCreator of the datasets included here.ssa:DataID.CreatorunicodeCharnullablessa_collectionA short handle naming the collection this spectrum belongs to.ssa:DataID.Collectioncharnullablessa_instrumentInstrument or code used to produce these datasetsmeta.id;instrssa:DataID.Instrumentcharnullablessa_datasourceMethod of generation for the data (one of survey, pointed, theory, custom, artificial).ssa:DataID.DataSourcecharnullablessa_creationtypeProcess used to produce the data (archival, cutout, filtered, mosaic, projection, spectralExtraction, or catalogExtraction)ssa:DataID.CreationTypecharnullablessa_referenceURL or bibcode of a publication describing this data.meta.bib.bibcodessa:Curation.Referencecharnullablessa_fluxstaterrorStatistical error in fluxstat.error;phot.flux.density;emssa:Char.FluxAxis.Accuracy.StatErrorfloatnullablessa_fluxsyserrorSystematic error in fluxstat.error.sys;phot.flux.density;emssa:Char.FluxAxis.Accuracy.SysErrorfloatnullablessa_fluxcalibType of flux calibration (ABSOLUTE, CALIBRATED, RELATIVE, NORMALIZED, or UNCALIBRATED).ssa:Char.FluxAxis.Calibrationcharnullablessa_binsizeBin size in wavelengthmem.wl;spect.binSizessa:Char.SpectralAxis.Accuracy.BinSizefloatnullablessa_spectstaterrorStatistical error in wavelengthmstat.error;emssa:Char.SpectralAxis.Accuracy.StatErrorfloatnullablessa_spectsyserrorSystematic error in wavelengthmstat.error.sys;emssa:Char.SpectralAxis.Accuracy.SysErrorfloatnullablessa_speccalibType of wavelength calibrationmeta.code.qualssa:Char.SpectralAxis.Calibrationcharnullablessa_specresResolution (in meters of wavelength) on the spectral axismspect.resolution;em.wlssa:Char.SpectralAxis.Resolution1.1e-111.1e-111.5e-111.5e-111.5e-111floatnullablessa_spaceerrorStatistical error in positiondegstat.error;pos.eqssa:Char.SpatialAxis.Accuracy.StatErrorfloatnullablessa_spacecalibType of calibration in spatial coordinatesmeta.code.qualssa:Char.SpatialAxis.Calibrationcharnullablessa_spaceresSpatial resolution of datadegpos.angResolutionssa:Char.SpatialAxis.ResolutionfloatnullablemobsidUnique identifier for the medium resolution spectrum (most of these have multiple observations and include a coadded spectrum).meta.id;meta.maincharssa_regionRough coverage based on location and aperture.pos.outline;obs.fielddoubleindexednullableobsidUnique identifier for the observation; LAMOST observations typically result in multiple spectra.meta.id;obs588902003590109148.0623301220.0666505112.06674162481.0longdesignationTarget Designation (IAU style)meta.idcharnullableplanidIdentifier of the observation planmeta.id;obs.proposalcharnullablespidIdentifier of the Spectragraph that took the source spectrum.meta.id;instr11.08.016.0161.0shortfiberidIdentifier of the fiber used to take the source spectrummeta.id;instr19.0125.0242.02501.0shortra_obsICRS right ascension of the fiber pointing (can be different from ra for bright sources).degpos.eq.ra0.002717414.8771116.07353.5853601doublenullabledec_obsICRS declination of the fiber pointingdegpos.eq.dec-9.19667-1.3948323.701660.571467.70411doublenullableobjtypeObject type: star, k2star, fs, rvcandi, galmeta.code.classcharnullablemagtypeDesignation of the bands of the magnitudes in mag_arr; this is not easy to parse by a machine, sorry.meta.codecharnullablemag_arrAn array of derived magnitudes. See mag_types for the bands these magnitudes are intended for.phot.magfloatnullablefibertypeFiber Type of target (one of Obj, Sky, F-std, Unused, PosErr, Dead)meta.code;instrcharnullabletarget_commentVarious comments (e.g., an external target id).meta.notecharnullableoffset_vOffset of the observation from the target coordinate (these are added for bright objects to prevent saturation).arcsecinstr.offset0.320.52.133.543.640.000876441floatnullableraICRS right ascension for this object from input cataloguedegpos.eq.ra;meta.main0.002717414.8771116.07353.5853601doublenullabledecICRS declination for this object from input cataloguedegpos.eq.dec;meta.main-9.19667-1.3948323.701660.571467.70411doublenullablerv_b0Radial velocity estimated from the B spectrum after continuum removal.km/sspect.dopplerVeloc-599.99-221.88-8.26234.11599.990.723511floatnullablerv_b0_errError in rv_b0.km/sstat.error;spect.dopplerVeloc0.130.381.643.948.660.723511floatnullablerv_r0Radial velocity estimated from the R spectrum after continuum removal.km/sspect.dopplerVeloc-600-118-6.7695.366000.761535floatnullablerv_r0_errError in rv_r0.km/sstat.error;spect.dopplerVeloc0.220.432.37.5920.330.761535floatnullablerv_br0Radial velocity estimated from the B and R spectra after continuum removal.km/sspect.dopplerVeloc-600-90.48-7.7577.23599.980.709411floatnullablerv_br0_errError in rv_br0.km/sstat.error;spect.dopplerVeloc0.130.461.563.438.670.709411floatnullablerv_lasp0Radial velocity estimated from the LAMOST stellar parameter pipeline.km/sspect.dopplerVeloc-494.88-73.04-9.7559.3461.040.211467floatnullablerv_lasp0_errError in rv_lasp0.km/sstat.error;spect.dopplerVeloc0.040.511.032.3399.930.203657floatnullablerv_b1rv_b0 after zero-point correctionkm/sspect.dopplerVeloc-600.87-216.865-2.99239.657606.630.723511floatnullablerv_b1_errError in rv_b1.km/sstat.error;spect.dopplerVeloc0.130.831.854.058.740.723511floatnullablerv_r1rv_r0 after zero-point correctionkm/sspect.dopplerVeloc-602.81-113.718-2.4499.78605.770.761535floatnullablerv_r1_errError in rv_r1.km/sstat.error;spect.dopplerVeloc0.221.32.717.7220.360.761535floatnullablerv_br1rv_br0 after zero-point correctionkm/sspect.dopplerVeloc-600.3-85.28-2.5782.5606.570.709411floatnullablerv_br1_errError in rv_br1.km/sstat.error;spect.dopplerVeloc0.130.941.793.548.730.709411floatnullablerv_lasp1rv_lasp0 after zero-point correctionkm/sspect.dopplerVeloc-488-66.17-3.1865.79467.450.209013floatnullablerv_lasp1_errError in rv_lasp1.km/sstat.error;spect.dopplerVeloc0.040.711.38.8999990.208978floatnullablerv_b_flagFlag for RV extraction in the b band: 0 – no anomalies; 1 – too many bad pixels; 2 – radial velocity in excess of 450 km/s; 3 – low similarity with best-matched template.meta.code.qual-128-128.00.00.031.0shortrv_r_flagFlag for RV extraction in the r band: 0 – no anomalies; 1 – too many bad pixels; 2 – radial velocity in excess of 450 km/s; 3 – low similarity with best-matched template.meta.code.qual-128-128.00.00.031.0shortrv_br_flagFlag for RV extraction in the br band: 0 – no anomalies; 1 – too many bad pixels; 2 – radial velocity in excess of 450 km/s; 3 – low similarity with best-matched template.meta.code.qual-128-128.00.00.031.0shortcoadd1 if this is a co-added spectrummeta.code00.00.01.011.0shortfibermaskBitmask for fiber problems. See note for the meaning for the bits.meta.code.qual00.00.00.02351.0shortbad_b1 if this is a problematic B spectrum.meta.code00.00.00.011.0shortbad_r1 if this is a problematic R spectrum.meta.code00.00.00.011.0short