dasch.narrow_plaivo://org.gavo.dc/dasch/q/narrow_platesThe GAVO DC teamHarvard College Observatory2026-01-13T14:17:56ZGAVO Data Centre Team

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gavo@ari.uni-heidelberg.de+49 6221 54 1837history-of-astronomyastrophotographyThis table holds metadata for the parts of DASCH counting as targeted observations (plate scale below 400 arcsec/mm. “Patrol” and “Meteor” plates in DASCH nomenclature are found in the wide_plates table.2012IAUS..285...29Ghttp://dc.g-vo.org/tableinfo/dasch.narrow_platesArchiveResearchIsServedByGAVO Data Center ObscoreGAVO Data Center TAP servicehttp://dc.g-vo.org/taphttps://dc.g-vo.org/tapHarvard-Smithsonian Center for AstrophysicsEastman Aero-Ektar K-24 Lens on a K-19 Barrel Formerly KG (1950)Damons North RedCooke Short FocusDamons South BlueDamons South Yellow4-inch Ross Lundin24-33 in Jewett SchmidtCerro Tololo 4 meter4-inch Voightlander Lens8-inch Brashear Lens4-inch Cooke (1-327)Eastman Aero-Ektar K-24 Lens on a K-19 Barrel Formerly KE (1951)3-inch Ross1 in Cook Lens #832 Series renamed from ac-a24-inch Clark ReflectorAir Force Camera10-inch Metcalf Triplet13-inch Boyden Refractor (spectrum plates)3 inch Perkin-Zeiss LensLowel 40 inch reflector1.5 inch Ross (short focus)Damons South Yellow4-inch Ross Lundin24-33 in Jewett SchmidtCerro Tololo 4 meter4-inch Voightlander Lens8-inch Brashear Lens4-inch Cooke (1-327)Eastman Aero-Ektar K-24 Lens on a K-19 Barrel Formerly KE (1951)3-inch Ross1 in Cook Lens #832 Series renamed from ac-a24-inch Clark ReflectorAir Force Camera10-inch Metcalf Triplet13-inch Boyden Refractor (spectrum plates)3 inch Perkin-Zeiss LensLowel 40 inch reflector1.5 inch Ross (short focus)8-inch Draper DoubletLogbook Only. Pages without plates.61-inch Wyeth ReflectorRoe 6-inch2.6-inch Zeiss-TessarDamons North YellowDamons South Red16-inch Boller & ChivensNew Cooke Lens5-in Voightlander Transit Photometer11-inch Draper Refractor12-inch Metcalf Doublet8-inch Bache DoubletPatrol cameras3-inch Ross Fecker24-inch Bruce DoubletKE Camera with Installed Rough Focus3-inch Darlot (Series renamed from j)8-inch Ross Lundin32-36 inch BakerSchmidt 10 1/2 inch round Armagh-Dunsink-HarvardK-19 Air Force Camera16-inch Metcalf Doublet (Refigured after 3500)Eastman Aero-Ektar K-24 Lens on a K-19 Barrel3 inch Ross-Tessar Lens7.5-inch Cooke/Clark Refractor at Maria Mitchell Observatory1.5-inch Ross-Xpress2.5-inch Ross Portrait2.5-inch Ross Portrait Lens60 inch Common2.5 inch Voigtlander (Little Bache or "Bachito")3-inch Elmer Ross4-inch Cooke Lens2.8-inch Kodak Aero-Ektar1-inch200 inch Hale Telescope60-inch Rockefeller Reflector2.5 inch Cooke LensAsiago Observatory 92/67 cm SchmidtDamons North Blue1.5-inch Cooke LensesPalomar Sky Survey (POSS)1.5 in Cooke "Long Focus"Miscellaneous test platesMisc BasementVarious Meteor Cameras13-inch Boyden RefractorPole Star RecorderYSO Double Astrograph0/0-11 6/9757 49751.00082OpticalivoaDefinition and support code for the ObsCore data model and table.ivoa.obscoreThis data collection is queryable in GAVO Data Center's obscore table.dasch This is a re-publication of the metadata from StarGlass, an information service operated by Harvard College Observatory (HCO) which primarily indexes the holdings of the HCO Astronomical Photographic Glass Plate Collection. This collection is the world's largest archive of astronomical photographic glass plates, consisting of more than 550,000 images documenting the entire sky over a century-long time baseline. Approximately 430,000 plates in the collection, representing the subset of sky images deemed suitable for astrometric and photometric calibration, have been digitized at high resolution by the DASCH project. StarGlass makes available both photographs and calibrated scientific data when available. This resource re-publishes the metadata in separate tables for “narrow” and “wide” (extremely wide-field) plates. The narrow plates are also published in an obscore table and as a SIAP2 service.dasch.narrow_platesThis table holds metadata for the parts of DASCH counting as targeted observations (plate scale below 400 arcsec/mm. “Patrol” and “Meteor” plates in DASCH nomenclature are found in the wide_plates table.340768dataproduct_typeHigh level scientific classification of the data product, taken from an enumerationmeta.code.classobscore:obsdataset.dataproducttypecharindexednullabledataproduct_subtypeData product specific typemeta.code.classobscore:obsdataset.dataproductsubtypecharnullablecalib_levelAmount of data processing that has been applied to the datameta.code;obs.calibobscore:obsdataset.caliblevel11.02.02.021.00123shortindexedobs_collectionName of a data collection (e.g., project name) this data belongs tometa.idobscore:dataid.collectionDASCHcharindexednullableobs_idUnique identifier for an observationmeta.idobscore:DataID.observationIDcharindexednullableobs_titleFree-from title of the data setmeta.title;obsobscore:dataid.titlecharnullableobs_publisher_didDataset identifier assigned by the publisher.meta.ref.ivoidobscore:curation.publisherdidcharindexednullableobs_creator_didDataset identifier assigned by the creator.meta.idobscore:dataid.creatordidcharnullableaccess_urlThe URL at which to obtain the data set.meta.ref.urlobscore:access.referencecharnullableaccess_formatMIME type of the resource at access_urlmeta.code.mimeobscore:access.formatcharnullableaccess_estsizeEstimated size of data productkbytephys.size;meta.fileobscore:access.size1010.010.010.0101.0longnullabletarget_nameObject a targeted observation targetedmeta.id;srcobscore:Target.Namecharnullabletarget_classClass of the target object (star, QSO, ...)src.classobscore:target.classNULLcharnullables_raRA of (center of) observation, ICRSdegpos.eq.raobscore:char.spatialaxis.coverage.location.coord.position2d.value2.c10.0023972511.9125197.731349.9133600.545579doubleindexednullables_decDec of (center of) observation, ICRSdegpos.eq.decobscore:char.spatialaxis.coverage.location.coord.position2d.value2.c2-89.9722-72.2835-2.0422989.382389.9880.545579doubleindexednullables_fovApproximate spatial extent for the region covered by the observationdegphys.angSize;instr.fovobscore:char.spatialaxis.coverage.bounds.extent.diameter0.6134473.3653214.008515.315450.39290.545579floatnullables_regionRegion covered by the observation, as a polygonpos.outline;obs.fieldobscore:char.spatialaxis.coverage.support.areacharindexednullables_resolutionBest spatial resolution within the data setarcsecpos.angResolutionobscore:Char.SpatialAxis.Resolution.refval.value4.8117e-050.5683881.829412.120686.807880.545579floatnullablet_minLower bound of times represented in the data setdtime.start;obs.exposureobscore:char.timeaxis.coverage.bounds.limits.starttime975711605.12319033980.4497511doubleindexednullablet_maxUpper bound of times represented in the data setdtime.end;obs.exposureobscore:char.timeaxis.coverage.bounds.limits.stoptime975711605.12319033980.4497511doubleindexednullablet_exptimeTotal exposure timestime.duration;obs.exposureobscore:char.timeaxis.coverage.support.extent0300180058205403000.54577floatnullablet_resolutionMinimal significant time interval along the time axisstime.resolutionobscore:char.timeaxis.resolution.refval.value0floatnullableem_minMinimal wavelength represented within the data setmem.wl;stat.minobscore:char.spectralaxis.coverage.bounds.limits.lolimit0floatindexednullableem_maxMaximal wavelength represented within the data setmem.wl;stat.maxobscore:char.spectralaxis.coverage.bounds.limits.hilimit0floatindexednullableem_res_powerSpectral resolving power lambda/delta lambdaspect.resolutionobscore:char.spectralaxis.resolution.resolpower.refval0floatnullableo_ucdUCD for the product's observablemeta.ucdobscore:char.observableaxis.ucdcharnullablepol_statesList of polarization states in the data setmeta.code;phys.polarizationobscore:Char.PolarizationAxis.stateListcharnullablefacility_nameName of the facility at which data was takenmeta.id;instr.telobscore:Provenance.ObsConfig.facility.nameHarvard-Smithsonian Center for Astrophysicscharnullableinstrument_nameName of the instrument that produced the datameta.id;instrobscore:Provenance.ObsConfig.instrument.name1 in Cook Lens #832 Series renamed from ac-a10-inch Metcalf Triplet11-inch Draper Refractor12-inch Metcalf Doublet13-inch Boyden Refractor16-inch Metcalf Doublet (Refigured after 3500)200 inch Hale Telescope24-33 in Jewett Schmidt24-inch Bruce Doublet24-inch Clark Reflector32-36 inch BakerSchmidt 10 1/2 inch round Armagh-Dunsink-Harvard4-inch Cooke (1-327)4-inch Cooke Lens4-inch Voightlander Lens7.5-inch Cooke/Clark Refractor at Maria Mitchell Observatory8-inch Bache Doublet8-inch Brashear Lens8-inch Draper Doublet8-inch Ross LundinAsiago Observatory 92/67 cm SchmidtLowel 40 inch reflectorPositivesYSO Double Astrographcharnullables_xel1Number of elements (typically pixels) along the first spatial axis.meta.numberobscore:Char.SpatialAxis.numBins186848757.017410.022041.0382430.5455794intnullables_xel2Number of elements (typically pixels) along the second spatial axis.meta.numberobscore:Char.SpatialAxis.numBins2868410977.021953.022041.0382430.5455794intnullablet_xelNumber of elements (typically pixels) along the time axis.meta.numberobscore:Char.TimeAxis.numBins11.01.01.011.0intnullableem_xelNumber of elements (typically pixels) along the spectral axis.meta.numberobscore:Char.SpectralAxis.numBins11.01.01.011.0intnullablepol_xelNumber of elements (typically pixels) along the polarization axis.meta.numberobscore:Char.PolarizationAxis.numBins0.0intnullables_pixel_scaleSampling period in world coordinate units along the spatial axisarcsecphys.angSize;instr.pixelobscore:Char.SpatialAxis.Sampling.RefVal.SamplingPeriod4.8117e-050.5683881.829412.120686.807880.545579floatnullableem_ucdNature of the product's spectral axis (typically, em.freq, em.wl, or em.energy)meta.ucdobscore:Char.SpectralAxis.ucdcharnullablesource_tableName of a TAP-queriable table this data originates from. This source table usually provides more information on the the data than what is given in obscore. See the TAP_SCHEMA of the originating TAP server for details.meta.id;meta.tablecharnullabledasch_idPlate identifier in DASCHmeta.id;meta.maincharindexedprimaryplate_commentComment associated with plate describing context or contentmeta.notecharnullableplate_classPlate class; Values are taken from https://library.cfa.harvard.edu/plate-classesmeta.codecharnullablemosaicsMetadata on the FITS files of the scans available; this is largely used by GAVO to produce the datalink document. In case you want to use it directly, see https://starglass.cfa.harvard.edu/docs/api/mosaics.htmlmeta;meta.datasetcharnullable