{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:4ZPELMTGKMK7JGZNEIWN2FMW42","short_pith_number":"pith:4ZPELMTG","canonical_record":{"source":{"id":"astro-ph/0304134","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-08T08:19:20Z","cross_cats_sorted":[],"title_canon_sha256":"bd884d013d06319c8da43a8b75cb93afa20a5a37a16f40d8326223f6e2a68c49","abstract_canon_sha256":"8f0b6684c91a2b9b1d69bb5bb4eec0e6d32e7ff4460412389e91ecae2b6cc688"},"schema_version":"1.0"},"canonical_sha256":"e65e45b2665315f49b2d222cdd1596e6ae1236456ef22f1257c147987f7eb5d5","source":{"kind":"arxiv","id":"astro-ph/0304134","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0304134","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0304134v2","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0304134","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"pith_short_12","alias_value":"4ZPELMTGKMK7","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"pith_short_16","alias_value":"4ZPELMTGKMK7JGZN","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"pith_short_8","alias_value":"4ZPELMTG","created_at":"2026-07-04T16:36:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:4ZPELMTGKMK7JGZNEIWN2FMW42","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0304134","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-08T08:19:20Z","cross_cats_sorted":[],"title_canon_sha256":"bd884d013d06319c8da43a8b75cb93afa20a5a37a16f40d8326223f6e2a68c49","abstract_canon_sha256":"8f0b6684c91a2b9b1d69bb5bb4eec0e6d32e7ff4460412389e91ecae2b6cc688"},"schema_version":"1.0"},"canonical_sha256":"e65e45b2665315f49b2d222cdd1596e6ae1236456ef22f1257c147987f7eb5d5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:36:48.929003Z","signature_b64":"o4t5nIRrq5TNDSEUjUkQwH+2qkHr5D2xWDywe7pRERDBJ57g6dUDV022+iNHHUPLgeum3tOcRXlA0azlYYyZCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e65e45b2665315f49b2d222cdd1596e6ae1236456ef22f1257c147987f7eb5d5","last_reissued_at":"2026-07-04T16:36:48.928597Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:36:48.928597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0304134","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":"2026-07-04T16:36:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"edd+K9CvJtteHat6xCAQLJ0DAJELrRaaRud985GDEC92agDSX6D0tFHLBKrOw+wsg6x0Mfiv+asBT4nmkDtSAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T01:05:19.955154Z"},"content_sha256":"575eb539f2f035a13a22a539bb12081d9b730312b2251aba443d125c5e42cd70","schema_version":"1.0","event_id":"sha256:575eb539f2f035a13a22a539bb12081d9b730312b2251aba443d125c5e42cd70"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:4ZPELMTGKMK7JGZNEIWN2FMW42","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hard X-ray Flares Preceding Soft X-ray Outbursts in Aquila X-1: A Link between Neutron Star and Black Hole State Transitions","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Marc Klein-Wolt, Michiel van der Klis (University of Amsterdam), Rob Fender, Wenfei Yu","submitted_at":"2003-04-08T08:19:20Z","abstract_excerpt":"We have analyzed {\\it Rossi X-ray Timing Explorer} (RXTE) data of the neutron star transient Aquila X-1 obtained during its outbursts in May/June 1999 and September/October 2000. We find that in the early rise of these outbursts, a hard flare in the energy range above 15 keV preceded the soft X-ray peak. The hard X-ray flux of the hard flares at maximum was more than a factor of three stronger than at any other point in the outbursts. The rise of the hard X-ray flare to this maximum, was consistent with a monotonically brightening low/hard state spectrum. After the peak of the hard flare, a sh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0304134","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0304134/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":"2026-07-04T16:36:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d6/RYPOqxflwTxlKBMxRUiwgkbkTfTQvaFZHeUtM25QOC4cQ048JaeTUjtlRa8jP/XHpRZCEnp30xWS8E5JIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T01:05:19.955534Z"},"content_sha256":"e958cebe7668efd546f3076be5df25f8f7cede3e00b6b8ccc7c03322e8d02e4b","schema_version":"1.0","event_id":"sha256:e958cebe7668efd546f3076be5df25f8f7cede3e00b6b8ccc7c03322e8d02e4b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4ZPELMTGKMK7JGZNEIWN2FMW42/bundle.json","state_url":"https://pith.science/pith/4ZPELMTGKMK7JGZNEIWN2FMW42/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4ZPELMTGKMK7JGZNEIWN2FMW42/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":"2026-08-05T01:05:19Z","links":{"resolver":"https://pith.science/pith/4ZPELMTGKMK7JGZNEIWN2FMW42","bundle":"https://pith.science/pith/4ZPELMTGKMK7JGZNEIWN2FMW42/bundle.json","state":"https://pith.science/pith/4ZPELMTGKMK7JGZNEIWN2FMW42/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4ZPELMTGKMK7JGZNEIWN2FMW42/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:4ZPELMTGKMK7JGZNEIWN2FMW42","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":"8f0b6684c91a2b9b1d69bb5bb4eec0e6d32e7ff4460412389e91ecae2b6cc688","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-08T08:19:20Z","title_canon_sha256":"bd884d013d06319c8da43a8b75cb93afa20a5a37a16f40d8326223f6e2a68c49"},"schema_version":"1.0","source":{"id":"astro-ph/0304134","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0304134","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0304134v2","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0304134","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"pith_short_12","alias_value":"4ZPELMTGKMK7","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"pith_short_16","alias_value":"4ZPELMTGKMK7JGZN","created_at":"2026-07-04T16:36:48Z"},{"alias_kind":"pith_short_8","alias_value":"4ZPELMTG","created_at":"2026-07-04T16:36:48Z"}],"graph_snapshots":[{"event_id":"sha256:e958cebe7668efd546f3076be5df25f8f7cede3e00b6b8ccc7c03322e8d02e4b","target":"graph","created_at":"2026-07-04T16:36:48Z","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/0304134/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have analyzed {\\it Rossi X-ray Timing Explorer} (RXTE) data of the neutron star transient Aquila X-1 obtained during its outbursts in May/June 1999 and September/October 2000. We find that in the early rise of these outbursts, a hard flare in the energy range above 15 keV preceded the soft X-ray peak. The hard X-ray flux of the hard flares at maximum was more than a factor of three stronger than at any other point in the outbursts. The rise of the hard X-ray flare to this maximum, was consistent with a monotonically brightening low/hard state spectrum. After the peak of the hard flare, a sh","authors_text":"Marc Klein-Wolt, Michiel van der Klis (University of Amsterdam), Rob Fender, Wenfei Yu","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-04-08T08:19:20Z","title":"Hard X-ray Flares Preceding Soft X-ray Outbursts in Aquila X-1: A Link between Neutron Star and Black Hole State Transitions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0304134","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":"sha256:575eb539f2f035a13a22a539bb12081d9b730312b2251aba443d125c5e42cd70","target":"record","created_at":"2026-07-04T16:36:48Z","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":"8f0b6684c91a2b9b1d69bb5bb4eec0e6d32e7ff4460412389e91ecae2b6cc688","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-08T08:19:20Z","title_canon_sha256":"bd884d013d06319c8da43a8b75cb93afa20a5a37a16f40d8326223f6e2a68c49"},"schema_version":"1.0","source":{"id":"astro-ph/0304134","kind":"arxiv","version":2}},"canonical_sha256":"e65e45b2665315f49b2d222cdd1596e6ae1236456ef22f1257c147987f7eb5d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e65e45b2665315f49b2d222cdd1596e6ae1236456ef22f1257c147987f7eb5d5","first_computed_at":"2026-07-04T16:36:48.928597Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:36:48.928597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o4t5nIRrq5TNDSEUjUkQwH+2qkHr5D2xWDywe7pRERDBJ57g6dUDV022+iNHHUPLgeum3tOcRXlA0azlYYyZCA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:36:48.929003Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0304134","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:575eb539f2f035a13a22a539bb12081d9b730312b2251aba443d125c5e42cd70","sha256:e958cebe7668efd546f3076be5df25f8f7cede3e00b6b8ccc7c03322e8d02e4b"],"state_sha256":"f1727bce23a888635fbb83cf01c14cc67411482bf3a1fedfb85dc8f8b7192950"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2dH8OwOQCVe8x9qcl0leFHpy60f40IeHlYu/aJ7zRUCTnKpW/pp7G4vvvQ1/bhSt6jB5SO94Nj8/tVJRPNCNCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T01:05:19.958181Z","bundle_sha256":"c49301d88d3bbec756dc5320a65668ac5c81614b95b2d94eb698a5c1aa8af68a"}}