The Nançay Cometary DatabaseBaseComivo://padc.obspm.planeto/basecom/q/epn_coreParis Astronomical Data CentrePADChttp://voparis-srv-paris.obspm.fr/logos/PADC_small.png2023-12-12T15:14:25ZJacques CrovisierObservatoire de Paris/PADC, 61 avenue de l’Observatoire, F-75014 PARISvo.paris@obspm.frspectroscopycometplanetary-sciencesolar-system-astronomy Since 1973, the 18-cm lines of the OH radical have been
systematically observed in a number of comets with the Nançay radio
telescope. This allowed an evaluation of the cometary water production
rates and their evolution with time, as well as a study of several
physical processes: the excitation mechanisms of the OH radio lines,
the expansion of the cometary atmospheres, their anisotropy in
relation with non-gravitational forces, the Zeeman effect in relation
with the cometary magnetic field. The Nançay observations of 53
cometary apparitions between 1982 and 2009 are now organized in this
database.http://voparis-tap-planeto.obspm.fr/tableinfo/basecom.epn_coreCatalogGeneralUniversityResearchIsServedByPADC TAP Server on voparis-tap-planeto.obspm.fr TAP servicehttp://voparis-tap-planeto.obspm.fr/tapNancayNançay Radio TelescopeRadioMillimeterbasecomThe Nançay Cometary Database Since 1973, the 18-cm lines of the OH radical have been
systematically observed in a number of comets with the Nançay radio
telescope. This allowed an evaluation of the cometary water production
rates and their evolution with time, as well as a study of several
physical processes: the excitation mechanisms of the OH radio lines,
the expansion of the cometary atmospheres, their anisotropy in
relation with non-gravitational forces, the Zeeman effect in relation
with the cometary magnetic field. The Nançay observations of 53
cometary apparitions between 1982 and 2009 are now organized in this
database.
basecom.epn_core Since 1973, the 18-cm lines of the OH radical have been
systematically observed in a number of comets with the Nançay radio
telescope. This allowed an evaluation of the cometary water production
rates and their evolution with time, as well as a study of several
physical processes: the excitation mechanisms of the OH radio lines,
the expansion of the cometary atmospheres, their anisotropy in
relation with non-gravitational forces, the Zeeman effect in relation
with the cometary magnetic field. The Nançay observations of 53
cometary apparitions between 1982 and 2009 are now organized in this
database.ivo://ivoa.net/std/epntap#table-2.0granule_uidInternal table row index, which must be unique within the table. Can be alphanumeric.meta.idcharindexedprimarygranule_gidCommon to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric.meta.idcharobs_idAssociates granules derived from the same data (e.g. various representations/processing levels). Can be alphanumeric, may be the ID of original observation.meta.id;obschardataproduct_typeThe high-level organization of the data product, from a controlled vocabulary (e.g., 'im' for image, sp for spectrum). Multiple terms may be used, separated by # characters.meta.code.classcharnullabletarget_nameStandard IAU name of target (from a list related to target class), case sensitivemeta.id;srccharnullabletarget_classType of target, from a controlled vocabulary.src.classcharnullabletime_minAcquisition start time (in JD), as UTC at time_refpositiondtime.start;obsdoublenullabletime_maxAcquisition stop time (in JD), as UTC at time_refpositiondtime.end;obsdoublenullabletime_sampling_step_minSampling time for measurements of dynamical phenomena, lower limit.stime.resolution;stat.mindoublenullabletime_sampling_step_maxSampling time for measurements of dynamical phenomena, upper limitstime.resolution;stat.maxdoublenullabletime_exp_minIntegration time of the measurement, lower limit.stime.duration;obs.exposure;stat.mindoublenullabletime_exp_maxIntegration time of the measurement, upper limitstime.duration;obs.exposure;stat.maxdoublenullablespectral_range_minSpectral range (frequency), lower limit.Hzem.freq;stat.mindoublenullablespectral_range_maxSpectral range (frequency), upper limitHzem.freq;stat.maxdoublenullablespectral_sampling_step_minSpectral sampling step, lower limit.Hzem.freq;spect.binSize;stat.mindoublenullablespectral_sampling_step_maxSpectral sampling step, upper limitHzem.freq;spect.binSize;stat.maxdoublenullablespectral_resolution_minSpectral resolution, lower limit.spect.resolution;stat.mindoublenullablespectral_resolution_maxSpectral resolution, upper limitspect.resolution;stat.maxdoublenullablec1minRight Ascension (ICRS), lower limit.degpos.eq.ra;stat.mindoublenullablec1maxRight Ascension (ICRS), upper limitdegpos.eq.ra;stat.maxdoublenullablec2minDeclination (ICRS), lower limit.degpos.eq.dec;stat.mindoublenullablec2maxDeclination (ICRS), upper limitdegpos.eq.dec;stat.maxdoublenullablec3minDistance from coordinate origin, lower limit.AUpos.distance;stat.mindoublenullablec3maxDistance from coordinate origin, upper limitAUpos.distance;stat.maxdoublenullables_regionObsCore-like footprint, valid for celestial, spherical, or body-fixed framespos.outline;obs.fieldcharnullablec1_resol_minResolution in the first coordinate, lower limit.degpos.angResolution;stat.mindoublenullablec1_resol_maxResolution in the first coordinate, upper limitdegpos.angResolution;stat.maxdoublenullablec2_resol_minResolution in the second coordinate, lower limit.degpos.angResolution;stat.mindoublenullablec2_resol_maxResolution in the second coordinate, upper limitdegpos.angResolution;stat.maxdoublenullablec3_resol_minResolution in the third coordinate, lower limit.AUpos.resolution;stat.mindoublenullablec3_resol_maxResolution in the third coordinate, upper limitAUpos.resolution;stat.maxdoublenullablespatial_frame_typeFlavor of coordinate system, defines the nature of coordinates. From a controlled vocabulary, where 'none' means undefined.meta.code.class;pos.framecharnullableincidence_minIncidence angle (solar zenithal angle) during data acquisition, lower limit.degpos.incidenceAng;stat.mindoublenullableincidence_maxIncidence angle (solar zenithal angle) during data acquisition, upper limitdegpos.incidenceAng;stat.maxdoublenullableemergence_minEmergence angle during data acquisition, lower limit.degpos.emergenceAng;stat.mindoublenullableemergence_maxEmergence angle during data acquisition, upper limitdegpos.emergenceAng;stat.maxdoublenullablephase_minPhase angle during data acquisition, lower limit.degpos.phaseAng;stat.mindoublenullablephase_maxPhase angle during data acquisition, upper limitdegpos.phaseAng;stat.maxdoublenullableinstrument_host_nameStandard name of the observatory or spacecraftmeta.id;instr.obstycharnullableinstrument_nameStandard name of instrumentmeta.id;instrcharnullablemeasurement_typeUCD(s) defining the data, with multiple entries separated by hash (#) characters.meta.ucdcharnullableprocessing_levelDataset-related encoding, or simplified CODMAC calibration levelmeta.calibLevelintcreation_dateDate of first entry of this granuletime.creationcharnullablemodification_dateDate of last modification (used to handle mirroring)time.processingcharnullablerelease_dateStart of public access periodtime.releasecharnullableservice_titleTitle of resource (an acronym really, will be used to handle multiservice results)meta.titlecharnullableaccess_urlURL of the data file, case sensitive. If present, then access_format and access_estsize are mandatory.meta.ref.url;meta.filecharnullableaccess_formatFile format type (RFC 6838 Media Type a.k.a. MIME type)meta.code.mimecharnullableaccess_estsizeEstimated file size in kbyte.kbytephys.size;meta.fileintnullableaccess_md5MD5 Hash for the filemeta.checksum;meta.filecharnullabletime_scaleDefaults to UTC in data services; takes values from http://www.ivoa.net/rdf/time_scale otherwisetime.scalecharnullablepublisherA short string identifying the entity running the data service usedmeta.curationcharnullablebib_referenceBibcode or DOI preferred if available, or other bibliographic identifier or URLmeta.bibcharnullablethumbnail_urlURL of a thumbnail image with predefined size (png ~200 pix, for use in a client only)meta.ref.url;meta.previewcharnullabletarget_regionType of region or feature of interestmeta.id;src;obs.fieldcharnullablespeciesIdentifies a chemical species, case sensitivemeta.id;phys.atmolcharnullablealt_target_nameProvides alternative target name if more common (e.g. comets); multiple identifiers can be separated by hashesmeta.id;srccharnullablefile_nameName of the data file only, case sensitivemeta.id;meta.filecharnullableexternal_linkWeb page providing more details on this granulemeta.ref.urlcharnullablesun_distance_minMin Sun-target distanceAUpos.distance;stat.mindoublenullablesun_distance_maxMax Sun-target distanceAUpos.distance;stat.maxdoublenullableearth_distance_minMin Earth-target distanceAUpos.distance;stat.mindoublenullableearth_distance_maxMax Earth-target distanceAUpos.distance;stat.maxdoublenullableraRight ascensiondegpos.eq.ra;meta.maindoublenullabledecDeclinationdegpos.eq.dec;meta.maindoublenullabletperihelionDate of perihelion, UTCtime.epochcharnullabledsun0Sun Distance at Perihelionaupos.distance;pos.heliocentricdoublenullablecomet_typeType of cometmeta.code.classcharnullableobsqualObservation quality: marginal/clearmeta.code.qualcharnullablestatusmeta.code.statusintfreqFrequencyHzem.freqdoublenullablepolarPolarisationphys.polarization.circularcharnullablerdotHeliocentric radial velocitykm/sphys.veloc.orbital;pos.heliocentricdoublenullableinv1OH maser inversion 1arithdoublenullableinv2OH maser inversion 2arithdoublenullabletbgBackground brightness temperatureKinstr.skyTempdoublenullableline_areaLine areamJy.km/sphys.area;spect.linedoublenullableline_area_errorLine area errormJy.km/sstat.error;phys.area;spect.linedoublenullableline_strengthLine maximum intensitymJyspect.line.strengthdoublenullableline_strength_errorLine maximum intensity errormJystat.error;spect.line.strengthdoublenullablev0Line central velocitykm/sspect.dopplerVelocdoublenullablev0_errorLine central velocity errorkm/sstat.error;spect.dopplerVelocdoublenullabledv0Line FWHMkm/sspect.line.widthdoublenullabledv0_errorLine FWHM errorkm/sstat.error;spect.line.widthdoublenullableq1ohOH production rate 1 (unit=10**28/s)arith.rate;phys.mass.lossdoublenullableq1_errorOH production rate 1 error (unit=10**28/s)stat.error;arith.rate;phys.mass.lossdoublenullableq2ohOH production rate 2 (unit=10**28/s)arith.rate;phys.mass.lossdoublenullableq2_errorOH production rate 2 error (unit=10**28/s)stat.error;arith.rate;phys.mass.lossdoublenullableoffdecDec Offset from targetdegpos.eq.dec;arith.diffdoublenullabledatalink_urlDatalinks and services for this granulemeta.ref.urlcharnullable