{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:IVWQ66TLXCZTZPMFUKVQJEQX3I","short_pith_number":"pith:IVWQ66TL","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"},"canonical_sha256":"456d0f7a6bb8b33cbd85a2ab049217da3813141542fbbf2aac0695035306170b","source":{"kind":"arxiv","id":"astro-ph/0305476","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0305476","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0305476v2","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0305476","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"IVWQ66TLXCZT","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"IVWQ66TLXCZTZPMF","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"IVWQ66TL","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:IVWQ66TLXCZTZPMFUKVQJEQX3I","target":"record","payload":{"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"},"canonical_sha256":"456d0f7a6bb8b33cbd85a2ab049217da3813141542fbbf2aac0695035306170b","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"},"source_kind":"arxiv","source_id":"astro-ph/0305476","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:23:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Idagjfr5GKcs5eaM+Xh3YpkGm6jCvklEj+Bux2u422RiFlSqxndXDbNzaqBe/1PPfqhoznji95pNsTYGppi7Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:57:39.228866Z"},"content_sha256":"24ef82466a5319dfe715c257514c117880e656b0326655dc44cb38abd06c2a3f","schema_version":"1.0","event_id":"sha256:24ef82466a5319dfe715c257514c117880e656b0326655dc44cb38abd06c2a3f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:IVWQ66TLXCZTZPMFUKVQJEQX3I","target":"graph","payload":{"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:23:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8P+uG7djwaSH4rIcs51SCobxNQX4Z5UunOs3/o1Z8y+7LBiwiwyMHGWDcsHgcI1FkcGcLl4L7i2CScBDHuKlCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:57:39.229556Z"},"content_sha256":"a8c88a2cd3a1ebd5dfc68dbaf7db7ca380272a0c795cf9a07f301b639171e73c","schema_version":"1.0","event_id":"sha256:a8c88a2cd3a1ebd5dfc68dbaf7db7ca380272a0c795cf9a07f301b639171e73c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/bundle.json","state_url":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T03:57:39Z","links":{"resolver":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I","bundle":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/bundle.json","state":"https://pith.science/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IVWQ66TLXCZTZPMFUKVQJEQX3I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:IVWQ66TLXCZTZPMFUKVQJEQX3I","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4e7f7d19e00833079b506278c4faeefdf2ba8be0972c42157f9d8a6b5432a28e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-24T00:20:33Z","title_canon_sha256":"33ba1f8feb45539b68b04712e41475199430c9c9bffbb09e884c615bf0e48912"},"schema_version":"1.0","source":{"id":"astro-ph/0305476","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0305476","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0305476v2","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0305476","created_at":"2026-05-18T04:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"IVWQ66TLXCZT","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"IVWQ66TLXCZTZPMF","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"IVWQ66TL","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:a8c88a2cd3a1ebd5dfc68dbaf7db7ca380272a0c795cf9a07f301b639171e73c","target":"graph","created_at":"2026-05-18T04:23:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"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","authors_text":"Andy Ptak, Dave Strickland (JHU), Edward Colbert, Kim Weaver (NASA/GSFC), Tim Heckman","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-05-24T00:20:33Z","title":"Old and Young X-ray Point Source Populations in Nearby Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0305476","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:24ef82466a5319dfe715c257514c117880e656b0326655dc44cb38abd06c2a3f","target":"record","created_at":"2026-05-18T04:23:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4e7f7d19e00833079b506278c4faeefdf2ba8be0972c42157f9d8a6b5432a28e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-24T00:20:33Z","title_canon_sha256":"33ba1f8feb45539b68b04712e41475199430c9c9bffbb09e884c615bf0e48912"},"schema_version":"1.0","source":{"id":"astro-ph/0305476","kind":"arxiv","version":2}},"canonical_sha256":"456d0f7a6bb8b33cbd85a2ab049217da3813141542fbbf2aac0695035306170b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"456d0f7a6bb8b33cbd85a2ab049217da3813141542fbbf2aac0695035306170b","first_computed_at":"2026-05-18T04:23:00.926310Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:00.926310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0TXiv2lCWeLg62ptnhne/f7CJqY2Djb4YaAhdckoGN2J7Il0CdjE1mojNIk8bvtzPXh0DSxzHlmHkxeqvs9VDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:00.926794Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0305476","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:24ef82466a5319dfe715c257514c117880e656b0326655dc44cb38abd06c2a3f","sha256:a8c88a2cd3a1ebd5dfc68dbaf7db7ca380272a0c795cf9a07f301b639171e73c"],"state_sha256":"866e5688378299c1d4e9ddb7a0cf502d43b58386903b2e1980bbfd1ce766d7be"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ctwoJTH5ZXkn9Mn99b3fAmrl9Sttvleua4EIuCDQxLCfGoC8zP320c7Bt/V0e8edYt3o5SPyZCpLIcXIWAGHAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T03:57:39.232372Z","bundle_sha256":"ece81d5ed09978f3f88a56b745b1effd7725ff69226adc02e80747989c811f1c"}}