cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.sxoqj3
title: Occurrence Download

description: A dataset containing 523873 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is Western Australian Museum provider for OZCAM"
 ]
}

 The dataset includes 523873 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0006275-170714134226665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7yvws6
title: Occurrence Download

description: A dataset containing 5704 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Verbascum speciosum Schrad.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 5704 records from 69 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0076747-231120084113126/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.g8dehm
title: Occurrence Download

description: A dataset containing 116787 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Lycium ferocissimum Miers"
 ]
}

 The dataset includes 116787 records from 93 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013107-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.qkfdvs
title: Occurrence Download

description: A dataset containing 16 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Plerandra vitiensis (Seem.) Baill."
 ]
}

 The dataset includes 16 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0006275-170826194755519/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.guwvn3
title: Occurrence Download

description: A dataset containing 25 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Argyreia confusa (Prain) Raizada"
 ]
}

 The dataset includes 25 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015071-240229165702484/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.phtnd7
title: Occurrence Download

description: A dataset containing 5737 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Africa",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Rattus rattus (Linnaeus, 1758)"
 ]
}

 The dataset includes 5737 records from 27 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0325473-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vdrmna
title: Occurrence Download

description: A dataset containing 50 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Cnemaspis kendallii (Gray, 1845)"
 ]
}

 The dataset includes 50 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0006275-171002173027117/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.cwnahn
title: Occurrence Download

description: A dataset containing 429 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Japan",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Papilio helenus Linnaeus, 1758"
 ]
}

 The dataset includes 429 records from 28 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0289590-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mctgn2
title: Occurrence Download

description: A dataset containing 2071 species occurrences available in GBIF matching the query:
{
 "and" : [
 "OccurrenceStatus is Present",
 "TaxonKey is Vaccinium delavayi Franch."
 ]
}

 The dataset includes 2071 records from 41 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0076835-231120084113126/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4lmhjm
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Colombia",
 {
 "or" : [
 "InstitutionCode is mo",
 "InstitutionCode is icn",
 "InstitutionCode is us",
 "InstitutionCode is col",
 "InstitutionCode is instituto de investigación de recursos biológicos alexander von humboldt (iavh)",
 "InstitutionCode is instituto amazónico de investigaciones científicas (sinchi)",
 "InstitutionCode is ma",
 "InstitutionCode is universidad de antioquia (udea)",
 "InstitutionCode is ny",
 "InstitutionCode is k",
 "InstitutionCode is ucaldas",
 "InstitutionCode is uquindío"
 ]
 },
 {
 "or" : [
 "TaxonKey is Passifloraceae",
 "TaxonKey is Turneraceae"
 ]
 }
 ]
}

 The dataset includes 0 records from 45 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0011927-190813142620410/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.86849f
title: Occurrence Download

description: A dataset containing 3866 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Crinia tinnula Straughan & Main, 1966"
 ]
}

 The dataset includes 3866 records from 17 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013147-210819072339941/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.fmk4vm
title: Occurrence Download

description: A dataset containing 74541 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Sorex araneus Linnaeus, 1758"
 ]
}

 The dataset includes 74541 records from 258 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0011928-190813142620410/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.m9f3yc
title: Occurrence Download

description: A dataset containing 200 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Carthamus dentatus (Forssk.) Vahl",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 200 records from 30 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0076836-231120084113126/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.gjhryd
title: Occurrence Download

description: A dataset containing 167 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Microhodotermes viator (Latreille, 1804)"
 ]
}

 The dataset includes 167 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003784-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.bu6zsc
title: Occurrence Download

description: A dataset containing 826 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "BasisOfRecord is Specimen",
 "BasisOfRecord is Human Observation",
 "BasisOfRecord is Machine Observation"
 ]
 },
 "Year 2000-2019",
 "Geometry POLYGON((-100.01953 8.05923,-69.96094 4.91583,-91.23047 31.35364,-121.46484 34.01624,-100.01953 8.05923))",
 "HasCoordinate is true",
 "TaxonKey is Desmodus rotundus (E.Geoffroy, 1810)",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 826 records from 60 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0011933-190813142620410/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.u56nth
title: Occurrence Download

description: A dataset containing 26434 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Verbascum densiflorum Bertol.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 26434 records from 351 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0076847-231120084113126/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.fuxzwn
title: Occurrence Download

description: A dataset containing 440 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is China",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "VerbatimScientificName is Potentilla fruticosa"
 ]
}

 The dataset includes 440 records from 12 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0231039-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4topmg
title: Occurrence Download

description: A dataset containing 4676 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Year 2015-2019",
 "TaxonKey is Centrocercus urophasianus (Bonaparte, 1827)"
 ]
}

 The dataset includes 4676 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0018370-191105090559680/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.yd2eny
title: Occurrence Download

description: A dataset containing 590 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Year 1970-2020",
 "CoordinateUncertaintyInMeters 0.0-5050.0",
 "TaxonKey is Lasiurus cinereus (Palisot de Beauvois, 1796)"
 ]
}

 The dataset includes 590 records from 25 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0022296-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.6vx7nn
title: Occurrence Download

description: A dataset containing 51585 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Tursiops truncatus (Montagu, 1821)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 51585 records from 223 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0070244-200221144449610/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.d7y6j6
title: Occurrence Download

description: A dataset containing 306 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((72.78680 39.02435,115.21320 39.02435,115.21320 55.97565,72.78680 55.97565,72.78680 39.02435))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Ochotona pallasi (Gray, 1867)"
 ]
}

 The dataset includes 306 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0038556-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ohk6qg
title: Occurrence Download

description: A dataset containing 1666 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "Country is Sweden",
 "Country is Norway",
 "Country is Belgium",
 "Country is Netherlands",
 "Country is Germany"
 ]
 },
 "Year 1970-2019",
 "HasCoordinate is true",
 "TaxonKey is Crassostrea gigas (Thunberg, 1793)",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 1666 records from 25 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002355-191105090559680/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.6buet2
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "and" : [
 "MediaType is Image",
 "TaxonKey is Calopteryx A.C.Sm."
 ]
}

 The dataset includes 2 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0032647-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vggrly
title: Occurrence Download

description: A dataset containing 180 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Chile",
 "TaxonKey is Myotis chiloensis (Waterhouse, 1840)"
 ]
}

 The dataset includes 180 records from 15 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005366-190320150433242/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7xe9zq
title: Occurrence Download

description: A dataset containing 4579 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "BasisOfRecord is Human Observation",
 "BasisOfRecord is Material sample",
 "BasisOfRecord is Literature Occurrence",
 "BasisOfRecord is Specimen",
 "BasisOfRecord is Living Specimen"
 ]
 },
 {
 "or" : [
 "Country is Venezuela (Bolivarian Republic of)",
 "Country is Belize",
 "Country is El Salvador",
 "Country is Panama",
 "Country is United States of America",
 "Country is Colombia",
 "Country is Costa Rica",
 "Country is Mexico",
 "Country is Brazil",
 "Country is Peru"
 ]
 },
 "HasCoordinate is true",
 "TaxonKey is Chiococca alba (L.) Hitchc.",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 4579 records from 202 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013835-191105090559680/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.sr2mj5
title: Occurrence Download

description: A dataset containing 96 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 {
 "or" : [
 "Issue is Geodetic datum assumed WGS84",
 "Issue is Coordinate rounded",
 "Issue is Coordinate reprojected"
 ]
 },
 "TaxonKey is Macrozamia stenomera L.A.S.Johnson"
 ]
}

 The dataset includes 96 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003521-180730143533302/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.34zbag
title: Occurrence Download

description: A dataset containing 893 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Callosciurus caniceps (Gray, 1842)"
 ]
}

 The dataset includes 893 records from 35 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0354617-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.g2mhmn
title: Occurrence Download

description: A dataset containing 2031 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((4.61041 52.60004,4.39746 52.18628,4.78674 52.08592,5.53326 52.10499,5.57336 52.3994,5.04987 52.63206,4.61041 52.60004))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 {
 "or" : [
 "TaxonKey is Tilia L.",
 "TaxonKey is Ulmus L."
 ]
 }
 ]
}

 The dataset includes 2031 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0050194-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9zgaxy
title: Occurrence Download

description: A dataset containing 47604 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Animalia",
 "DecimalLatitude is greater than 37.2589631862692",
 "DecimalLatitude is less than 37.8883591343723",
 "DecimalLongitude is greater than -86.0802719406146",
 "DecimalLongitude is less than -85.2987599743038"
 ]
}

 The dataset includes 47604 records from 71 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003521-180824113759888/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.48jfmz
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Macrocera abdominalis Okada, 1937",
 "HasCoordinate is true",
 "Country is Japan",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0209340-220831081235567/datasets/export for details.
DOI: 10.15468/dl.ygsdtj
title: Occurrence Download

description: A dataset containing 11946 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Pardirallus sanguinolentus (Swainson, 1838)"
 ]
}

 The dataset includes 11946 records from 43 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003521-181108115102211/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.yzz97f
title: Occurrence Download

description: A dataset containing 2442 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Maackia amurensis Rupr."
 ]
}

 The dataset includes 2442 records from 130 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0337108-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7f2yvq
title: Occurrence Download

description: A dataset containing 15506 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Year 1970-2000",
 "HasCoordinate is true",
 {
 "or" : [
 "TaxonKey is Solanum melongena L.",
 "TaxonKey is Musa acuminata subsp. burmannica N.W.Simmonds",
 "TaxonKey is Luffa cylindrica (L.) M.Roem.",
 "TaxonKey is Hibiscus surattensis L.",
 "TaxonKey is Boesenbergia rotunda (L.) Mansf.",
 "TaxonKey is Abelmoschus esculentus (L.) Moench",
 "TaxonKey is Dioscorea transversa R.Br.",
 "TaxonKey is Vigna unguiculata subsp. stenophylla (Harv.) Maréchal, Mascherpa & Stainier",
 "TaxonKey is Solanum aethiopicum L.",
 "TaxonKey is Hibiscus mechowii Garcke",
 "TaxonKey is Guizotia abyssinica (L.fil.) Cass.",
 "TaxonKey is Dioscorea cavenensis Lam.",
 "TaxonKey is Cyamopsis tetragonoloba (L.) Taub.",
 "TaxonKey is Canavalia gladiata (Jacq.) DC.",
 "TaxonKey is Triticum urartu Thumanjan ex Gandilyan",
 "TaxonKey is Aegilops tauschii Coss.",
 "TaxonKey is Triticum dicoccon Schrank",
 "TaxonKey is Triticum boeoticum Boiss.",
 "TaxonKey is Triticum dicoccoides (Körnicke) G.Schweinfurth",
 "TaxonKey is Eragrostis pilosa (L.) P.Beauv.",
 "TaxonKey is Echinochloa esculenta (A.Braun) H.Scholz",
 "TaxonKey is Oryza barthii A.Chev.",
 "TaxonKey is Digitaria exilis (Kippist) Stapf"
 ]
 },
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 15506 records from 284 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0008025-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.6j49wh
title: Occurrence Download

description: A dataset containing 10 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is Tanzanian Vertebrate Collection",
 "TaxonKey is Amphibia"
 ]
}

 The dataset includes 10 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0109236-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25574/csc2.obs.05747
title: Chandra X-ray Observatory ObsId 05747

description: CSC uses combined (i.e. overlapping) Chandra observations for detecting X-ray sources. This allows the catalog to include significantly fainter sources than CSC 1.1. The set of overlapping observations that have been combined in this way is known as a "stack".
DOI: 10.15468/dl.k8ahe8
title: Occurrence Download

description: A dataset containing 67 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "TaxonKey is Laomedea calceolifera (Hincks, 1871)",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 67 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003521-190320150433242/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ud67em
title: Occurrence Download

description: A dataset containing 3898 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Country is Australia",
 "Year 2015-2020",
 "DatasetKey is EOD – eBird Observation Dataset",
 "TaxonKey is Heteromyias cinereifrons (E.P.Ramsay, 1876)"
 ]
}

 The dataset includes 3898 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0016259-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.pn7z5n
title: Occurrence Download

description: A dataset containing 15044 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is United States of America",
 "GadmGid is USA.44_1",
 "TaxonKey is Megachilidae"
 ]
}

 The dataset includes 15044 records from 29 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0080652-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25574/csc2.obs.13836
title: Chandra X-ray Observatory ObsId 13836

description: CSC uses combined (i.e. overlapping) Chandra observations for detecting X-ray sources. This allows the catalog to include significantly fainter sources than CSC 1.1. The set of overlapping observations that have been combined in this way is known as a "stack".
DOI: 10.15468/dl.vfpbky
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Iran (Islamic Republic of)",
 "HasCoordinate is true",
 "TaxonKey is Luciobarbus xanthopterus Heckel, 1843",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005367-181108115102211/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25574/csc2.obs.13837
title: Chandra X-ray Observatory ObsId 13837

description: CSC uses combined (i.e. overlapping) Chandra observations for detecting X-ray sources. This allows the catalog to include significantly fainter sources than CSC 1.1. The set of overlapping observations that have been combined in this way is known as a "stack".