{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:IVWQ66TLXCZTZPMFUKVQJEQX3I","short_pith_number":"pith:IVWQ66TL","schema_version":"1.0","canonical_sha256":"456d0f7a6bb8b33cbd85a2ab049217da3813141542fbbf2aac0695035306170b","source":{"kind":"arxiv","id":"astro-ph/0305476","version":2},"attestation_state":"computed","paper":{"title":"Old and Young X-ray Point Source Populations in Nearby Galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andy Ptak, Dave Strickland (JHU), Edward Colbert, Kim Weaver (NASA/GSFC), Tim Heckman","submitted_at":"2003-05-24T00:20:33Z","abstract_excerpt":"We analyzed 1441 Chandra X-ray point sources in 32 nearby galaxies. The total point-source X-ray luminosity L_XP is well correlated with B, K, and FIR+UV luminosities of spiral host galaxies, and with the B and K luminosities for ellipticals. This suggests an intimate connection between L_XP and both the old and young stellar populations, for which K and FIR+UV luminosities are proxies for the galaxy mass M and star-formation rate SFR. We derive proportionality constants 1.3E29 erg/s/Msol and 0.7E39 erg/s/(Msol/yr), which can be used to estimate the old and young components from M and SFR, res"},"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":"astro-ph/0305476","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-24T00:20:33Z","cross_cats_sorted":[],"title_canon_sha256":"33ba1f8feb45539b68b04712e41475199430c9c9bffbb09e884c615bf0e48912","abstract_canon_sha256":"4e7f7d19e00833079b506278c4faeefdf2ba8be0972c42157f9d8a6b5432a28e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:00.926794Z","signature_b64":"0TXiv2lCWeLg62ptnhne/f7CJqY2Djb4YaAhdckoGN2J7Il0CdjE1mojNIk8bvtzPXh0DSxzHlmHkxeqvs9VDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"456d0f7a6bb8b33cbd85a2ab049217da3813141542fbbf2aac0695035306170b","last_reissued_at":"2026-05-18T04:23:00.926310Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:00.926310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Old and Young X-ray Point Source Populations in Nearby Galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andy Ptak, Dave Strickland (JHU), Edward Colbert, Kim Weaver (NASA/GSFC), Tim Heckman","submitted_at":"2003-05-24T00:20:33Z","abstract_excerpt":"We analyzed 1441 Chandra X-ray point sources in 32 nearby galaxies. The total point-source X-ray luminosity L_XP is well correlated with B, K, and FIR+UV luminosities of spiral host galaxies, and with the B and K luminosities for ellipticals. This suggests an intimate connection between L_XP and both the old and young stellar populations, for which K and FIR+UV luminosities are proxies for the galaxy mass M and star-formation rate SFR. We derive proportionality constants 1.3E29 erg/s/Msol and 0.7E39 erg/s/(Msol/yr), which can be used to estimate the old and young components from M and SFR, res"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0305476","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":"astro-ph/0305476","created_at":"2026-05-18T04:23:00.926395+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0305476v2","created_at":"2026-05-18T04:23:00.926395+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0305476","created_at":"2026-05-18T04:23:00.926395+00:00"},{"alias_kind":"pith_short_12","alias_value":"IVWQ66TLXCZT","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_16","alias_value":"IVWQ66TLXCZTZPMF","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_8","alias_value":"IVWQ66TL","created_at":"2026-05-18T12:25:52.051335+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.17040","citing_title":"PEARLS: JWST Counterparts of Micro-Jy Radio Sources in the NEP Time Domain Field. II. All Four Spokes","ref_index":135,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I","json":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I.json","graph_json":"https://pith.science/api/pith-number/IVWQ66TLXCZTZPMFUKVQJEQX3I/graph.json","events_json":"https://pith.science/api/pith-number/IVWQ66TLXCZTZPMFUKVQJEQX3I/events.json","paper":"https://pith.science/paper/IVWQ66TL"},"agent_actions":{"view_html":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I","download_json":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I.json","view_paper":"https://pith.science/paper/IVWQ66TL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0305476&json=true","fetch_graph":"https://pith.science/api/pith-number/IVWQ66TLXCZTZPMFUKVQJEQX3I/graph.json","fetch_events":"https://pith.science/api/pith-number/IVWQ66TLXCZTZPMFUKVQJEQX3I/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/action/storage_attestation","attest_author":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/action/author_attestation","sign_citation":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/action/citation_signature","submit_replication":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/action/replication_record"}},"created_at":"2026-05-18T04:23:00.926395+00:00","updated_at":"2026-05-18T04:23:00.926395+00:00"}