cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.x4j7e2
title: Occurrence Download

description: A dataset containing 1329 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Populus canescens",
 "Country is Denmark",
 "HasCoordinate is true"
 ]
}

 The dataset includes 1329 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013723-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kqae4r
title: Occurrence Download

description: A dataset listing the 22 species recorded in GBIF matching the query:
{
 "and" : [
 "License is one of (CC-BY 4.0, CC0 1.0)",
 "MediaType is Image",
 "TaxonKey is one of (Agalma elegans, Aequorea)"
 ]
}

 The dataset's 22 records were derived from 14 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013705-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.6f9q4b
title: Occurrence Download

description: A dataset containing 32 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Populus canescens",
 "Country is Estonia",
 "HasCoordinate is true"
 ]
}

 The dataset includes 32 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013724-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8jg849
title: Occurrence Download

description: A dataset containing 783 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-101.49902 17.09891,-86.04796 17.09891,-86.0537 20.53801,-86.04796 23.28609,-101.49902 23.28609,-101.49902 17.09891))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Acanthurus bahianus",
 "Year 2000-2025"
 ]
}

 The dataset includes 783 records from 17 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013725-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7c6tc9
title: Occurrence Download

description: A dataset containing 4891 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Ophioblennius steindachneri"
 ]
}

 The dataset includes 4891 records from 72 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013726-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.yufmta
title: Occurrence Download

description: A dataset containing 79686 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "and" : [
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 }
 ]
 },
 "TaxonKey is one of (Ricinus communis)"
 ]
}

 The dataset includes 79686 records from 764 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013704-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.xbc8ia
title: Occurrence Download

description: A dataset containing 24 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is MVZ Herp Observations (Arctos)"
 ]
}

 The dataset includes 24 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005054-181003121212138/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/ylvo7k
title: 20201028111016.tab

description: :unav
DOI: 10.15468/dl.dvnw5v
title: Occurrence Download

description: A dataset containing 122 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "Country is Mexico",
 {
 "or" : [
 "TaxonKey is Phrynosoma taurus Dugés, 1868",
 "TaxonKey is Phrynosoma taurus Bocourt, 1870"
 ]
 }
 ]
}

 The dataset includes 122 records from 26 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004069-190320150433242/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/kkljsf
title: 20201028160834.tab

description: :unav
DOI: 10.15468/dl.dvh74y
title: Occurrence Download

description: A dataset containing 1617 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Tirumala septentrionis (Butler, 1874)"
 ]
}

 The dataset includes 1617 records from 38 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0139867-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/7i9cxq
title: 20201028151851.tab

description: :unav
DOI: 10.15468/dl.ockwpm
title: Occurrence Download

description: A dataset containing 272 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "TaxonKey is Corallus hortulana (Linnaeus, 1758)",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 272 records from 34 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005054-190320150433242/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/mf3bid
title: 20201028142310.tab

description: :unav
DOI: 10.15468/dl.pwqtet
title: Occurrence Download

description: A dataset containing 797910 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Fagus sylvatica L."
 ]
}

 The dataset includes 797910 records from 860 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0081117-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/rdwr2i
title: 20201028115528.tab

description: :unav
DOI: 10.60933/prdr/7agonw/cty5wy
title: 20201028172617.tab

description: :unav
DOI: 10.15468/dl.dew2yu
title: Occurrence Download

description: A dataset containing 764 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Neogobius fluviatilis (Pallas, 1814)"
 ]
}

 The dataset includes 764 records from 39 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0081063-200221144449610/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/kfrzpt
title: 20201028113952.tab

description: :unav
DOI: 10.15468/dl.ve9f5n
title: Occurrence Download

description: A dataset containing 1116 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Rhipicephalus microplus Canestrini, 1888"
 ]
}

 The dataset includes 1116 records from 20 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0081121-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.2tqatf
title: Occurrence Download

description: A dataset containing 21 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "TaxonKey is Artocarpus camansi Blanco",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 21 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0018255-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/nla32w
title: 20201028172434.tab

description: :unav
DOI: 10.15468/dl.esefux
title: Occurrence Download

description: A dataset containing 2012 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "TaxonKey is Aegilops tauschii Coss.",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 2012 records from 32 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015193-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/nhyneb
title: 20201028145156.tab

description: :unav
DOI: 10.60933/prdr/7agonw/gbu6mt
title: 20201028104941.tab

description: :unav
DOI: 10.15468/dl.zux54x
title: Occurrence Download

description: A dataset containing 650 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Bothrops neuwiedi Wagler, 1824"
 ]
}

 The dataset includes 650 records from 49 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0023836-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.frbamr
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Orthosia rubescens Walker, 1865",
 {
 "not" : {
 "DatasetKey" : [
 "is Global database of alien macrofungi"
 ]
 }
 },
 {
 "or" : [
 "Country is Poland",
 "Country is Poland"
 ]
 }
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0394163-210914110416597/datasets/export for details.
DOI: 10.15468/dl.h2aj9s
title: Occurrence Download

description: A dataset containing 28129 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Vultur gryphus Linnaeus, 1758"
 ]
}

 The dataset includes 28129 records from 86 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015209-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hazgb8
title: Occurrence Download

description: A dataset listing the 13 species recorded in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "DatasetKey is iNaturalist Research-grade Observations",
 "DatasetKey is NSW BioNet Atlas",
 "DatasetKey is Waarnemingen.be - Bird occurrences in Flanders and the Brussels Capital Region, Belgium",
 "DatasetKey is Southern African Bird Atlas Project 2",
 "DatasetKey is INPN - Données flore des CBN agrégées par la FCBN",
 "DatasetKey is Norwegian Species Observation Service",
 "DatasetKey is DOF/BirdLife Denmark - Observations from DOFbasen",
 "DatasetKey is Observation.org, Nature data from around the World",
 "DatasetKey is Artportalen (Swedish Species Observation System)",
 "DatasetKey is EOD – eBird Observation Dataset"
 ]
 },
 "Geometry POLYGON((33.64014 46.34389,32.40967 45.73379,32.40967 45.17894,33.24463 44.39925,34.4751 44.17905,36.54053 44.86833,36.58447 45.85635,35.52979 45.67241,34.43115 46.07018,33.64014 46.34389))",
 "HasGeospatialIssue is false",
 {
 "or" : [
 "TaxonKey is Clinopodium serpyllifolium (M.Bieb.) Kuntze",
 "TaxonKey is Eremogone saxatilis (L.) Ikonn.",
 "TaxonKey is Himantoglossum caprinum (M.Bieb.) Spreng.",
 "TaxonKey is Gymnadenia conopsea (L.) R.Br.",
 "TaxonKey is Dactylorhiza incarnata (L.) Soó",
 "TaxonKey is Corallorhiza trifida Châtel.",
 "TaxonKey is Scilla bifolia L.",
 "TaxonKey is Convallaria majalis L.",
 "TaxonKey is Adonis vernalis L.",
 "TaxonKey is Tulipa sylvestris subsp. australis (Link) Pamp.",
 "TaxonKey is Tulipa suaveolens Roth",
 "TaxonKey is Ferula caspica M.Bieb.",
 "TaxonKey is Ruppia maritima L.",
 "TaxonKey is Ruppia cirrhosa (Petagna) Grande"
 ]
 },
 "Year 1900-2021"
 ]
}

 The dataset's 13 records were derived from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0338936-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jywu7t
title: Occurrence Download

description: A dataset containing 411 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "BasisOfRecord is Observation",
 "BasisOfRecord is Human Observation",
 "BasisOfRecord is Material sample",
 "BasisOfRecord is Specimen"
 ]
 },
 {
 "or" : [
 "Country is United States of America",
 "Country is Mexico",
 "Country is Guatemala",
 "Country is Belize",
 "Country is El Salvador",
 "Country is Honduras",
 "Country is Nicaragua",
 "Country is Costa Rica",
 "Country is Panama"
 ]
 },
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Cenchrus americanus (L.) Morrone"
 ]
}

 The dataset includes 411 records from 50 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027461-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ydcxeh
title: Occurrence Download

description: A dataset containing 42 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "BasisOfRecord is Human Observation",
 "BasisOfRecord is Specimen",
 "BasisOfRecord is Fossil",
 "BasisOfRecord is Living Specimen"
 ]
 },
 "HasCoordinate is true",
 "TaxonKey is Orites myrtoideus Benth. & Hook.fil.",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 42 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007105-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.60933/prdr/7agonw/xxqtql
title: 20201028104639.tab

description: :unav
DOI: 10.15468/dl.pahf5r
title: Occurrence Download

description: A dataset containing 267894 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "TaxonKey is Zenaida auriculata (Des Murs, 1847)",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 267894 records from 160 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0023841-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ywgapw
title: Occurrence Download

description: A dataset containing 1376 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Country is Canada",
 "Issue is Geodetic datum assumed WGS84",
 "TaxonKey is Quercus rubra L."
 ]
}

 The dataset includes 1376 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0033351-191105090559680/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.xyaao0
title: Occurrence Download

description: A dataset containing 307 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Acacia davyi N.E.Br."
 ]
}

 The dataset includes 307 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005055-180131172636756/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.6084/m9.figshare.25962691
title: Data for the manuscript: Graph-based 3D spatial gene neighborhood networks in gel-embedded single cells

description: The dataset contains detected transcripts in mesenchymal stem cells (MSCs) cultured in hydrogel (hydrogel_df.csv) and detected transcripts in MSC-peripheral blood mononuclear cells (PBMCs) coculture in Cultrex gel.
DOI: 10.60933/prdr/7agonw/zoxrsi
title: 20201028152332.tab

description: :unav
DOI: 10.60933/prdr/7agonw/oyghpu
title: 20201028112644.tab

description: :unav
DOI: 10.15468/dl.epf7md
title: Occurrence Download

description: A dataset containing 11743 species occurrences available in GBIF matching the query:
{
 "or" : [
 "TaxonKey is Allium stipitatum Regel",
 "TaxonKey is Allium karataviense Regel",
 "TaxonKey is Allium macleanii Baker",
 "TaxonKey is Allium oschaninii O.Fedtsch.",
 "TaxonKey is Allium oschaninii B.Fedtsch., 1906",
 "TaxonKey is Allium rosenbachianum Regel",
 "TaxonKey is Allium rosenbachianum subsp. kwakense R.M.Fritsch",
 "TaxonKey is Allium sativum L.",
 "TaxonKey is Allium trautvetterianum Regel",
 "TaxonKey is Bunium persicum (Boiss.) B.Fedtsch.",
 "TaxonKey is Ferula violacea Korovin",
 "TaxonKey is Fritillaria eduardii A.Regel ex Regel",
 "TaxonKey is Fritillaria eduardii Regel ex Losinsk.",
 "TaxonKey is Fritillaria eduardii var. eduardii",
 "TaxonKey is Fritillaria eduardii var. inodora (Regel) Wietsma",
 "TaxonKey is Galagania fragrantissima Lipsky",
 "TaxonKey is Inula macrophylla Sch.Bip.",
 "TaxonKey is Inula macrophylla C.C.Gmel., 1811",
 "TaxonKey is Inula macrophylla Kar. & Kir.",
 "TaxonKey is Paulia ovczinnikovii Korovin",
 "TaxonKey is Rheum maximowiczii Losinsk."
 ]
}

 The dataset includes 11743 records from 259 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0036092-200613084148143/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.00020
title: Chandra X-ray Observatory ObsId 00020

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: 10.25574/csc2.obs.02548
title: Chandra X-ray Observatory ObsId 02548

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: 10.25574/csc2.obs.05906
title: Chandra X-ray Observatory ObsId 05906

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: 10.25574/csc2.obs.04607
title: Chandra X-ray Observatory ObsId 04607

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: 10.25574/csc2.obs.13151
title: Chandra X-ray Observatory ObsId 13151

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: 10.25574/csc2.obs.03744
title: Chandra X-ray Observatory ObsId 03744

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: 10.25574/csc2.obs.04373
title: Chandra X-ray Observatory ObsId 04373

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: 10.25574/csc2.obs.07264
title: Chandra X-ray Observatory ObsId 07264

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: 10.25574/csc2.obs.22299
title: Chandra X-ray Observatory ObsId 22299

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: 10.25574/csc2.obs.07417
title: Chandra X-ray Observatory ObsId 07417

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: 10.25574/csc2.obs.11580
title: Chandra X-ray Observatory ObsId 11580

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: 10.25574/csc2.obs.17904
title: Chandra X-ray Observatory ObsId 17904

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: 10.25574/csc2.obs.02832
title: Chandra X-ray Observatory ObsId 02832

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: 10.25574/csc2.obs.16199
title: Chandra X-ray Observatory ObsId 16199

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: 10.25574/csc2.obs.07263
title: Chandra X-ray Observatory ObsId 07263

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: 10.25574/csc2.obs.20139
title: Chandra X-ray Observatory ObsId 20139

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: 10.25574/csc2.obs.16200
title: Chandra X-ray Observatory ObsId 16200

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: 10.25574/csc2.obs.21854
title: Chandra X-ray Observatory ObsId 21854

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".