{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:FV5MC5JF35JXQTV5VW4IXISQOL","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":"55f66ecf4a8eb84a8e703274c1b6b60903a5e6c31970088f1f500df5895abd3f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-01-12T16:43:19Z","title_canon_sha256":"ba485299a4920bea1049f04260a09a578956154f5e4a5cd6f1870bd5d73ff0fe"},"schema_version":"1.0","source":{"id":"astro-ph/0301195","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0301195","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0301195v1","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0301195","created_at":"2026-05-18T04:21:42Z"},{"alias_kind":"pith_short_12","alias_value":"FV5MC5JF35JX","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"FV5MC5JF35JXQTV5","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"FV5MC5JF","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:fe9a3b77719357abea21b3a886eaa00bddb1a12c598583b84e68b5bf934b0a3c","target":"graph","created_at":"2026-05-18T04:21:42Z","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 report the hard X-ray properties of the young Crab-like LMC pulsar PSR B0540-69, using archival RXTE PCA (2 - 60 keV) and RXTE HEXTE (15 - 250 keV) data. Making use of the very long effective exposure of 684 ks, we derived a very detailed master pulse profile for energies 2 - 20 keV. We confirm the broad single-pulse shape with a dip in the middle and with a significant fine structure to the left of the dip. For the first time pulse profiles in the 10 - 50 keV energy interval are shown. Remarkably, the coarse pulse shape is stable from the optical up to X-ray energies analogous to the case ","authors_text":"2), (2) Astronomical Institute, J. de Plaa (1, L. Kuiper (1), the Netherlands), The Netherlands, Utrecht University, W. Hermsen (1) ((1) SRON National Institute for Space Research","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-01-12T16:43:19Z","title":"Hard X-ray timing and spectral properties of PSR B0540-69"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0301195","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:db15f13cbe3711d02d166c2e18125d535f434a13e885ef28c876ee1cf127c9b0","target":"record","created_at":"2026-05-18T04:21:42Z","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":"55f66ecf4a8eb84a8e703274c1b6b60903a5e6c31970088f1f500df5895abd3f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-01-12T16:43:19Z","title_canon_sha256":"ba485299a4920bea1049f04260a09a578956154f5e4a5cd6f1870bd5d73ff0fe"},"schema_version":"1.0","source":{"id":"astro-ph/0301195","kind":"arxiv","version":1}},"canonical_sha256":"2d7ac17525df53784ebdadb88ba25072f5f9384c2c8e9c2eff7a4d851c6e1c03","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d7ac17525df53784ebdadb88ba25072f5f9384c2c8e9c2eff7a4d851c6e1c03","first_computed_at":"2026-05-18T04:21:42.232069Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:42.232069Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"olTDHNzB5W06Ua/Qf7VCaYMO36c3eV/EXY35SsAdcaDGeUK9Ly+4u0575AsOkbrjuwiaXnbLdor3ynwKkpsDDw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:42.232668Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0301195","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db15f13cbe3711d02d166c2e18125d535f434a13e885ef28c876ee1cf127c9b0","sha256:fe9a3b77719357abea21b3a886eaa00bddb1a12c598583b84e68b5bf934b0a3c"],"state_sha256":"164673e9fb25d7bc59a1c1d130931260d283b385849d8da94b090e1b8ebf8a76"}