{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:K6VRSHSHBCVGDXWUBSZEAZDREM","short_pith_number":"pith:K6VRSHSH","schema_version":"1.0","canonical_sha256":"57ab191e4708aa61ded40cb2406471231093aa4341eb3decb5a31b7e88698416","source":{"kind":"arxiv","id":"1609.06650","version":2},"attestation_state":"computed","paper":{"title":"Young Stellar Populations in MYStIX Star Forming Regions: Candidate Protostars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Eric D. Feigelson, Gregory Romine, Konstantin V. Getman, Matthew S. Povich, Michael A. Kuhn","submitted_at":"2016-09-21T17:51:12Z","abstract_excerpt":"The Massive Young Star Forming Complex in Infrared and X-ray (MYStIX) project provides a new census on stellar members of massive star forming regions within 4 kpc. Here the MYStIX Infrared Excess catalog (MIRES) and Chandra-based X-ray photometric catalogs are mined to obtain high-quality samples of Class I protostars using criteria designed to reduce extragalactic and Galactic field star contamination. A total of 1,109 MYStIX Candidate Protostars (MCPs) are found in 14 star forming regions. Most are selected from protoplanetary disk infrared excess emission, but 20% are found from their ultr"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1609.06650","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-09-21T17:51:12Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"7350c5369492505696ffed7a017c53ca8d853a2d43fc48ff11824ab0010b8c43","abstract_canon_sha256":"02c268a1e580c602b69e1faca1667dc705fab5648f5d91989b57b7c9ea607e8e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:54:29.384331Z","signature_b64":"krN3+ws3gRW6L/tuW7OCok3ovLAP1oz63YJsnKsfUGw8lc9VvAiZ2ODk8EduNrera8oX5YJs/4ND/bjQc8o+AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"57ab191e4708aa61ded40cb2406471231093aa4341eb3decb5a31b7e88698416","last_reissued_at":"2026-05-18T00:54:29.383602Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:54:29.383602Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Young Stellar Populations in MYStIX Star Forming Regions: Candidate Protostars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Eric D. Feigelson, Gregory Romine, Konstantin V. Getman, Matthew S. Povich, Michael A. Kuhn","submitted_at":"2016-09-21T17:51:12Z","abstract_excerpt":"The Massive Young Star Forming Complex in Infrared and X-ray (MYStIX) project provides a new census on stellar members of massive star forming regions within 4 kpc. Here the MYStIX Infrared Excess catalog (MIRES) and Chandra-based X-ray photometric catalogs are mined to obtain high-quality samples of Class I protostars using criteria designed to reduce extragalactic and Galactic field star contamination. A total of 1,109 MYStIX Candidate Protostars (MCPs) are found in 14 star forming regions. Most are selected from protoplanetary disk infrared excess emission, but 20% are found from their ultr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.06650","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1609.06650","created_at":"2026-05-18T00:54:29.383717+00:00"},{"alias_kind":"arxiv_version","alias_value":"1609.06650v2","created_at":"2026-05-18T00:54:29.383717+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.06650","created_at":"2026-05-18T00:54:29.383717+00:00"},{"alias_kind":"pith_short_12","alias_value":"K6VRSHSHBCVG","created_at":"2026-05-18T12:30:25.849896+00:00"},{"alias_kind":"pith_short_16","alias_value":"K6VRSHSHBCVGDXWU","created_at":"2026-05-18T12:30:25.849896+00:00"},{"alias_kind":"pith_short_8","alias_value":"K6VRSHSH","created_at":"2026-05-18T12:30:25.849896+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM","json":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM.json","graph_json":"https://pith.science/api/pith-number/K6VRSHSHBCVGDXWUBSZEAZDREM/graph.json","events_json":"https://pith.science/api/pith-number/K6VRSHSHBCVGDXWUBSZEAZDREM/events.json","paper":"https://pith.science/paper/K6VRSHSH"},"agent_actions":{"view_html":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM","download_json":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM.json","view_paper":"https://pith.science/paper/K6VRSHSH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1609.06650&json=true","fetch_graph":"https://pith.science/api/pith-number/K6VRSHSHBCVGDXWUBSZEAZDREM/graph.json","fetch_events":"https://pith.science/api/pith-number/K6VRSHSHBCVGDXWUBSZEAZDREM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM/action/storage_attestation","attest_author":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM/action/author_attestation","sign_citation":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM/action/citation_signature","submit_replication":"https://pith.science/pith/K6VRSHSHBCVGDXWUBSZEAZDREM/action/replication_record"}},"created_at":"2026-05-18T00:54:29.383717+00:00","updated_at":"2026-05-18T00:54:29.383717+00:00"}