{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:Q4U5BY2VOLFAVJZ6CXQQSY4UCZ","short_pith_number":"pith:Q4U5BY2V","canonical_record":{"source":{"id":"astro-ph/0208131","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-08-06T17:27:26Z","cross_cats_sorted":[],"title_canon_sha256":"1eadf22bbfa5e828ad235a593e1686f3f2fbb02ea5f4064cc3fe19030fe2422f","abstract_canon_sha256":"0af2104058e2b6ad2e29841f899c23394ac7d3b46f33c8088e7ab3dea6fbc298"},"schema_version":"1.0"},"canonical_sha256":"8729d0e35572ca0aa73e15e109639416576a81fdb3f28548c97fe9b9439753fc","source":{"kind":"arxiv","id":"astro-ph/0208131","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0208131","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0208131v1","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0208131","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"pith_short_12","alias_value":"Q4U5BY2VOLFA","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"pith_short_16","alias_value":"Q4U5BY2VOLFAVJZ6","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"pith_short_8","alias_value":"Q4U5BY2V","created_at":"2026-07-04T14:12:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:Q4U5BY2VOLFAVJZ6CXQQSY4UCZ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0208131","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-08-06T17:27:26Z","cross_cats_sorted":[],"title_canon_sha256":"1eadf22bbfa5e828ad235a593e1686f3f2fbb02ea5f4064cc3fe19030fe2422f","abstract_canon_sha256":"0af2104058e2b6ad2e29841f899c23394ac7d3b46f33c8088e7ab3dea6fbc298"},"schema_version":"1.0"},"canonical_sha256":"8729d0e35572ca0aa73e15e109639416576a81fdb3f28548c97fe9b9439753fc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:12:09.274010Z","signature_b64":"cp9R5HXhG2/0x1+TdMHCpDaY/YxextDMEWq4H06jUrKt8F4g9o2r3eBqZhOhNauwJOSqO1vdF+geJD0r/LfgCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8729d0e35572ca0aa73e15e109639416576a81fdb3f28548c97fe9b9439753fc","last_reissued_at":"2026-07-04T14:12:09.273489Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:12:09.273489Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0208131","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T14:12:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NHlDu3tg/Z/JEWCykyN//8DjummeJBsgU9DlJDILZ458wSM6+nv8DEw5DDhS/bki13YW4b1WeG+MdYYHQUU8CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T18:06:28.808840Z"},"content_sha256":"a1cf5c03221415b764c83f82e79dca8ba92d18b1e8dfd140716e816460adfb35","schema_version":"1.0","event_id":"sha256:a1cf5c03221415b764c83f82e79dca8ba92d18b1e8dfd140716e816460adfb35"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:Q4U5BY2VOLFAVJZ6CXQQSY4UCZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The 2002 outburst of the microquasar XTE J1550-564","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.P. Colombo, Italy), J. Homan, Merate, M. van der Klis (Astronomical Institute, S. Campana (Osservatorio Astronomico di Brera, T. Belloni, the Netherlands), University of Amsterdam","submitted_at":"2002-08-06T17:27:26Z","abstract_excerpt":"We present results of spectral and timing analysis based on 11 RXTE PCA/HEXTE observations of the microquasar XTE J1550-564 during its last outburst in January 2002. The observed behaviour is comparable to most Black-Hole Candidates in the low/hard state. This is unlike the 1998-99 outburst, when it showed a much more complex feature, probably because of the higher luminosity. For each of the 11 observations we extracted energy spectra and power density spectra, finding typical features of a low/hard state."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0208131","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0208131/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T14:12:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uVbsAftKlMjnmi2/8Uj6K4UEwOg5kCjwy991x48NkZnQoeAbWep4eGOAQQ21XVL56t5mQ+eRjxR1bWAcfiqLCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T18:06:28.809209Z"},"content_sha256":"6f1a1bd875641c5fee87617b0d48696da6a145319d5cb74b61daf3cfc5e62c85","schema_version":"1.0","event_id":"sha256:6f1a1bd875641c5fee87617b0d48696da6a145319d5cb74b61daf3cfc5e62c85"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q4U5BY2VOLFAVJZ6CXQQSY4UCZ/bundle.json","state_url":"https://pith.science/pith/Q4U5BY2VOLFAVJZ6CXQQSY4UCZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q4U5BY2VOLFAVJZ6CXQQSY4UCZ/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":"2026-07-06T18:06:28Z","links":{"resolver":"https://pith.science/pith/Q4U5BY2VOLFAVJZ6CXQQSY4UCZ","bundle":"https://pith.science/pith/Q4U5BY2VOLFAVJZ6CXQQSY4UCZ/bundle.json","state":"https://pith.science/pith/Q4U5BY2VOLFAVJZ6CXQQSY4UCZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q4U5BY2VOLFAVJZ6CXQQSY4UCZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:Q4U5BY2VOLFAVJZ6CXQQSY4UCZ","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":"0af2104058e2b6ad2e29841f899c23394ac7d3b46f33c8088e7ab3dea6fbc298","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-08-06T17:27:26Z","title_canon_sha256":"1eadf22bbfa5e828ad235a593e1686f3f2fbb02ea5f4064cc3fe19030fe2422f"},"schema_version":"1.0","source":{"id":"astro-ph/0208131","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0208131","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0208131v1","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0208131","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"pith_short_12","alias_value":"Q4U5BY2VOLFA","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"pith_short_16","alias_value":"Q4U5BY2VOLFAVJZ6","created_at":"2026-07-04T14:12:09Z"},{"alias_kind":"pith_short_8","alias_value":"Q4U5BY2V","created_at":"2026-07-04T14:12:09Z"}],"graph_snapshots":[{"event_id":"sha256:6f1a1bd875641c5fee87617b0d48696da6a145319d5cb74b61daf3cfc5e62c85","target":"graph","created_at":"2026-07-04T14:12:09Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0208131/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present results of spectral and timing analysis based on 11 RXTE PCA/HEXTE observations of the microquasar XTE J1550-564 during its last outburst in January 2002. The observed behaviour is comparable to most Black-Hole Candidates in the low/hard state. This is unlike the 1998-99 outburst, when it showed a much more complex feature, probably because of the higher luminosity. For each of the 11 observations we extracted energy spectra and power density spectra, finding typical features of a low/hard state.","authors_text":"A.P. Colombo, Italy), J. Homan, Merate, M. van der Klis (Astronomical Institute, S. Campana (Osservatorio Astronomico di Brera, T. Belloni, the Netherlands), University of Amsterdam","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-08-06T17:27:26Z","title":"The 2002 outburst of the microquasar XTE J1550-564"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0208131","kind":"arxiv","version":1},"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:a1cf5c03221415b764c83f82e79dca8ba92d18b1e8dfd140716e816460adfb35","target":"record","created_at":"2026-07-04T14:12:09Z","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":"0af2104058e2b6ad2e29841f899c23394ac7d3b46f33c8088e7ab3dea6fbc298","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-08-06T17:27:26Z","title_canon_sha256":"1eadf22bbfa5e828ad235a593e1686f3f2fbb02ea5f4064cc3fe19030fe2422f"},"schema_version":"1.0","source":{"id":"astro-ph/0208131","kind":"arxiv","version":1}},"canonical_sha256":"8729d0e35572ca0aa73e15e109639416576a81fdb3f28548c97fe9b9439753fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8729d0e35572ca0aa73e15e109639416576a81fdb3f28548c97fe9b9439753fc","first_computed_at":"2026-07-04T14:12:09.273489Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:12:09.273489Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cp9R5HXhG2/0x1+TdMHCpDaY/YxextDMEWq4H06jUrKt8F4g9o2r3eBqZhOhNauwJOSqO1vdF+geJD0r/LfgCg==","signature_status":"signed_v1","signed_at":"2026-07-04T14:12:09.274010Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0208131","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a1cf5c03221415b764c83f82e79dca8ba92d18b1e8dfd140716e816460adfb35","sha256:6f1a1bd875641c5fee87617b0d48696da6a145319d5cb74b61daf3cfc5e62c85"],"state_sha256":"446fe47e7ef55fec781d3a9792d8a8843774554e47d465530e3e02a013c7db7d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CKeRZ1y6hZHIHggfnkLN3GjMtcKtTrChgBDhqY1MZq6s53gCt5z8adhUdadUkCqZIlLZrwA3VWypzXQ6GXK6Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T18:06:28.811093Z","bundle_sha256":"7eb627469ad92a6c887bf153c96adbb4b703794562dea1f140ddb225dbafc71b"}}