{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:6PSHTVADXXCTNRSFTIU5WES2GY","short_pith_number":"pith:6PSHTVAD","canonical_record":{"source":{"id":"1808.03036","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-09T06:32:19Z","cross_cats_sorted":[],"title_canon_sha256":"56c25cb75caa658a1f21e22f600548ee82b8dc54493dd74e29b1fbd04787a709","abstract_canon_sha256":"2409126ac49badb7c5cdc519c0f3408ed70c2d265d2aead7cb36c93db50bf78b"},"schema_version":"1.0"},"canonical_sha256":"f3e479d403bdc536c6459a29db125a363fbf22c9673586761c39c8ebded13856","source":{"kind":"arxiv","id":"1808.03036","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.03036","created_at":"2026-05-18T00:07:33Z"},{"alias_kind":"arxiv_version","alias_value":"1808.03036v1","created_at":"2026-05-18T00:07:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.03036","created_at":"2026-05-18T00:07:33Z"},{"alias_kind":"pith_short_12","alias_value":"6PSHTVADXXCT","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"6PSHTVADXXCTNRSF","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"6PSHTVAD","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:6PSHTVADXXCTNRSFTIU5WES2GY","target":"record","payload":{"canonical_record":{"source":{"id":"1808.03036","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-09T06:32:19Z","cross_cats_sorted":[],"title_canon_sha256":"56c25cb75caa658a1f21e22f600548ee82b8dc54493dd74e29b1fbd04787a709","abstract_canon_sha256":"2409126ac49badb7c5cdc519c0f3408ed70c2d265d2aead7cb36c93db50bf78b"},"schema_version":"1.0"},"canonical_sha256":"f3e479d403bdc536c6459a29db125a363fbf22c9673586761c39c8ebded13856","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:33.665521Z","signature_b64":"aIHmPS9mzInjLQPPO1qrh6DgSb47s4xp+5xfA+ovIzuE3zymCpAd+F1YYscy58Z0VLkb1SZOJjpTSglSH1IQAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3e479d403bdc536c6459a29db125a363fbf22c9673586761c39c8ebded13856","last_reissued_at":"2026-05-18T00:07:33.664892Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:33.664892Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.03036","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":"2026-05-18T00:07:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nq/324XzQFKyynCoG2vtyls4lNhjLl1DwJrosbvS4tGDyb/DiUYVZ1scECqOhAdR7Ar2bIzuvl7E9HFJ199fBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:14:43.662481Z"},"content_sha256":"697c7337f08c83688bdeabf32e781b6cf81ddfafba29bea4d44c3e49ef8f941f","schema_version":"1.0","event_id":"sha256:697c7337f08c83688bdeabf32e781b6cf81ddfafba29bea4d44c3e49ef8f941f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:6PSHTVADXXCTNRSFTIU5WES2GY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of a pulsating Fe Ka line in GX 301-2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Erlin Qiao, Jifeng Liu, Jiren Liu, Roberto Soria","submitted_at":"2018-08-09T06:32:19Z","abstract_excerpt":"We report on the detection of a pulsating Fe Ka line in the High Mass X-ray Binary (HMXB) GX 301-2, from a 40-ks Chandra observation near periastron. The pulsations in the Fe Ka emission appeared only in the first 7 ks of the observation, with a period and phase profile similar to those of the continuum. The presence of pulsed fluorescent lines is an unusual property in HMXBs. After 7 ks, the continuum flux increased by a factor of three, the Fe Ka flux increased only by about 10\\%, and the pulsating signal in the line disappeared. Finally, in the second half of the observation, both the conti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.03036","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":""},"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":"2026-05-18T00:07:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dU+ee241Bd77k4F7nk0RrmL+vb05of3CwJNU8ITufqjUjPRmd9tOx1v7qokS1Wm7JlN9cTt4n9QMMLX6whR/Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:14:43.662903Z"},"content_sha256":"cd4b7ee55438344e47b618d96673635d8b6aa41a4349b0c8051b3abb140d0a6f","schema_version":"1.0","event_id":"sha256:cd4b7ee55438344e47b618d96673635d8b6aa41a4349b0c8051b3abb140d0a6f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6PSHTVADXXCTNRSFTIU5WES2GY/bundle.json","state_url":"https://pith.science/pith/6PSHTVADXXCTNRSFTIU5WES2GY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6PSHTVADXXCTNRSFTIU5WES2GY/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":"2026-05-25T22:14:43Z","links":{"resolver":"https://pith.science/pith/6PSHTVADXXCTNRSFTIU5WES2GY","bundle":"https://pith.science/pith/6PSHTVADXXCTNRSFTIU5WES2GY/bundle.json","state":"https://pith.science/pith/6PSHTVADXXCTNRSFTIU5WES2GY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6PSHTVADXXCTNRSFTIU5WES2GY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:6PSHTVADXXCTNRSFTIU5WES2GY","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":"2409126ac49badb7c5cdc519c0f3408ed70c2d265d2aead7cb36c93db50bf78b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-09T06:32:19Z","title_canon_sha256":"56c25cb75caa658a1f21e22f600548ee82b8dc54493dd74e29b1fbd04787a709"},"schema_version":"1.0","source":{"id":"1808.03036","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.03036","created_at":"2026-05-18T00:07:33Z"},{"alias_kind":"arxiv_version","alias_value":"1808.03036v1","created_at":"2026-05-18T00:07:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.03036","created_at":"2026-05-18T00:07:33Z"},{"alias_kind":"pith_short_12","alias_value":"6PSHTVADXXCT","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"6PSHTVADXXCTNRSF","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"6PSHTVAD","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:cd4b7ee55438344e47b618d96673635d8b6aa41a4349b0c8051b3abb140d0a6f","target":"graph","created_at":"2026-05-18T00:07:33Z","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 on the detection of a pulsating Fe Ka line in the High Mass X-ray Binary (HMXB) GX 301-2, from a 40-ks Chandra observation near periastron. The pulsations in the Fe Ka emission appeared only in the first 7 ks of the observation, with a period and phase profile similar to those of the continuum. The presence of pulsed fluorescent lines is an unusual property in HMXBs. After 7 ks, the continuum flux increased by a factor of three, the Fe Ka flux increased only by about 10\\%, and the pulsating signal in the line disappeared. Finally, in the second half of the observation, both the conti","authors_text":"Erlin Qiao, Jifeng Liu, Jiren Liu, Roberto Soria","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-09T06:32:19Z","title":"Discovery of a pulsating Fe Ka line in GX 301-2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.03036","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":"sha256:697c7337f08c83688bdeabf32e781b6cf81ddfafba29bea4d44c3e49ef8f941f","target":"record","created_at":"2026-05-18T00:07:33Z","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":"2409126ac49badb7c5cdc519c0f3408ed70c2d265d2aead7cb36c93db50bf78b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-08-09T06:32:19Z","title_canon_sha256":"56c25cb75caa658a1f21e22f600548ee82b8dc54493dd74e29b1fbd04787a709"},"schema_version":"1.0","source":{"id":"1808.03036","kind":"arxiv","version":1}},"canonical_sha256":"f3e479d403bdc536c6459a29db125a363fbf22c9673586761c39c8ebded13856","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f3e479d403bdc536c6459a29db125a363fbf22c9673586761c39c8ebded13856","first_computed_at":"2026-05-18T00:07:33.664892Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:33.664892Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aIHmPS9mzInjLQPPO1qrh6DgSb47s4xp+5xfA+ovIzuE3zymCpAd+F1YYscy58Z0VLkb1SZOJjpTSglSH1IQAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:33.665521Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.03036","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:697c7337f08c83688bdeabf32e781b6cf81ddfafba29bea4d44c3e49ef8f941f","sha256:cd4b7ee55438344e47b618d96673635d8b6aa41a4349b0c8051b3abb140d0a6f"],"state_sha256":"315630178bc4b139093a0d3bc28ac504c6992845b777c361ca7f6b37690b11e8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0HYf8FbC6FwXVDxrcCh909LfHD8o+SIb+vPZW9XjvqldFrPeezQrQ9cxn6s0W4ZeBQgky7qlG1KTDgIRp0DbBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:14:43.665328Z","bundle_sha256":"9ec663dfef945d11296ff67d676afe11e3053865e6112325c54b84636acc5465"}}