{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:SXAXQGSAOXJAP5IFEBJWALWNKB","short_pith_number":"pith:SXAXQGSA","canonical_record":{"source":{"id":"astro-ph/9706009","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-06-02T14:18:23Z","cross_cats_sorted":[],"title_canon_sha256":"04347862eb763b664ad269e1118ac4e883126170e4af3e93313ab70cf905acb7","abstract_canon_sha256":"5bd84c02ffb6a64d1d14322e41ea657f04559730aa265e9b14746657b90084a9"},"schema_version":"1.0"},"canonical_sha256":"95c1781a4075d207f5052053602ecd50544a204b5ef8b88bad2e29b7ee2c6312","source":{"kind":"arxiv","id":"astro-ph/9706009","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9706009","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9706009v1","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9706009","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"pith_short_12","alias_value":"SXAXQGSAOXJA","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"pith_short_16","alias_value":"SXAXQGSAOXJAP5IF","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"pith_short_8","alias_value":"SXAXQGSA","created_at":"2026-07-04T14:15:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:SXAXQGSAOXJAP5IFEBJWALWNKB","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9706009","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-06-02T14:18:23Z","cross_cats_sorted":[],"title_canon_sha256":"04347862eb763b664ad269e1118ac4e883126170e4af3e93313ab70cf905acb7","abstract_canon_sha256":"5bd84c02ffb6a64d1d14322e41ea657f04559730aa265e9b14746657b90084a9"},"schema_version":"1.0"},"canonical_sha256":"95c1781a4075d207f5052053602ecd50544a204b5ef8b88bad2e29b7ee2c6312","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:15:08.947730Z","signature_b64":"PSfBkDfOrwEwtVgevdIS8ThVWN2+iDkiCd9gfta0sRro48jorl5LlLRgzNn589aNZgyKRRmw1on/NjuJn2D+CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"95c1781a4075d207f5052053602ecd50544a204b5ef8b88bad2e29b7ee2c6312","last_reissued_at":"2026-07-04T14:15:08.947282Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:15:08.947282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9706009","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":"2026-07-04T14:15:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"44ll8tr5bQmdhke5CDp6NveiAbuouhDSZ3RyiDAfjjOEC3f0eKUbxfuZiB8QJWNny5IM9klbuXEt7Hh01+oNDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T00:29:56.289301Z"},"content_sha256":"5f4d67861ee0995742591b05c54bd491990a2b5718837d9d2798a23a740913bf","schema_version":"1.0","event_id":"sha256:5f4d67861ee0995742591b05c54bd491990a2b5718837d9d2798a23a740913bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:SXAXQGSAOXJAP5IFEBJWALWNKB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-energy line emission from Cygnus X-2 observed with the BeppoSAX LECS","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2), (2) Univ. of Oxford), A. N. Parmar (1), A. Owens (1), E. Kuulkers (1, T. Oosterbroek (1), U. Lammers (1) ((1) ESA/ESTEC","submitted_at":"1997-06-02T14:18:23Z","abstract_excerpt":"We present a 0.2-10 keV spectrum of the low-mass X-ray binary Cygnus X-2 obtained using the Low Energy Concentrator Spectrometer on-board Bepposax. The spectrum can be described by a cut-off power-law model with absorption of (2.28 +/- 0.07) 10^{21} atoms/cm^2, a power-law index of 0.78 +/- 0.02 and a cut-off energy of 4.30 +/- 0.08 keV (68% confidence errors), except at energies near ~1 keV where excess emission is present. This can be modeled by a broad Gaussian line feature with an energy of 1.02 +/- 0.04 keV, a full width half-maximum of 0.47 +/- 0.07 keV and an equivalent width of 74 +/-^"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9706009","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/9706009/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":"2026-07-04T14:15:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p2v/UIECPv4LM/ZyE17fs+UvhLDSZDIwVTfjiuL7tAf1uXgfzmRQg5f87C5Cao1AOKNj4TnSap3fx5hS4sTeDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T00:29:56.289822Z"},"content_sha256":"2ee1c3b9c56d6d1bba16fb5155793b50fdf7aeb0de419e228a243784b069c71d","schema_version":"1.0","event_id":"sha256:2ee1c3b9c56d6d1bba16fb5155793b50fdf7aeb0de419e228a243784b069c71d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SXAXQGSAOXJAP5IFEBJWALWNKB/bundle.json","state_url":"https://pith.science/pith/SXAXQGSAOXJAP5IFEBJWALWNKB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SXAXQGSAOXJAP5IFEBJWALWNKB/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":"2026-08-15T00:29:56Z","links":{"resolver":"https://pith.science/pith/SXAXQGSAOXJAP5IFEBJWALWNKB","bundle":"https://pith.science/pith/SXAXQGSAOXJAP5IFEBJWALWNKB/bundle.json","state":"https://pith.science/pith/SXAXQGSAOXJAP5IFEBJWALWNKB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SXAXQGSAOXJAP5IFEBJWALWNKB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:SXAXQGSAOXJAP5IFEBJWALWNKB","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":"5bd84c02ffb6a64d1d14322e41ea657f04559730aa265e9b14746657b90084a9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-06-02T14:18:23Z","title_canon_sha256":"04347862eb763b664ad269e1118ac4e883126170e4af3e93313ab70cf905acb7"},"schema_version":"1.0","source":{"id":"astro-ph/9706009","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9706009","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9706009v1","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9706009","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"pith_short_12","alias_value":"SXAXQGSAOXJA","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"pith_short_16","alias_value":"SXAXQGSAOXJAP5IF","created_at":"2026-07-04T14:15:08Z"},{"alias_kind":"pith_short_8","alias_value":"SXAXQGSA","created_at":"2026-07-04T14:15:08Z"}],"graph_snapshots":[{"event_id":"sha256:2ee1c3b9c56d6d1bba16fb5155793b50fdf7aeb0de419e228a243784b069c71d","target":"graph","created_at":"2026-07-04T14:15:08Z","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/9706009/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a 0.2-10 keV spectrum of the low-mass X-ray binary Cygnus X-2 obtained using the Low Energy Concentrator Spectrometer on-board Bepposax. The spectrum can be described by a cut-off power-law model with absorption of (2.28 +/- 0.07) 10^{21} atoms/cm^2, a power-law index of 0.78 +/- 0.02 and a cut-off energy of 4.30 +/- 0.08 keV (68% confidence errors), except at energies near ~1 keV where excess emission is present. This can be modeled by a broad Gaussian line feature with an energy of 1.02 +/- 0.04 keV, a full width half-maximum of 0.47 +/- 0.07 keV and an equivalent width of 74 +/-^","authors_text":"2), (2) Univ. of Oxford), A. N. Parmar (1), A. Owens (1), E. Kuulkers (1, T. Oosterbroek (1), U. Lammers (1) ((1) ESA/ESTEC","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-06-02T14:18:23Z","title":"Low-energy line emission from Cygnus X-2 observed with the BeppoSAX LECS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9706009","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":"sha256:5f4d67861ee0995742591b05c54bd491990a2b5718837d9d2798a23a740913bf","target":"record","created_at":"2026-07-04T14:15:08Z","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":"5bd84c02ffb6a64d1d14322e41ea657f04559730aa265e9b14746657b90084a9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-06-02T14:18:23Z","title_canon_sha256":"04347862eb763b664ad269e1118ac4e883126170e4af3e93313ab70cf905acb7"},"schema_version":"1.0","source":{"id":"astro-ph/9706009","kind":"arxiv","version":1}},"canonical_sha256":"95c1781a4075d207f5052053602ecd50544a204b5ef8b88bad2e29b7ee2c6312","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95c1781a4075d207f5052053602ecd50544a204b5ef8b88bad2e29b7ee2c6312","first_computed_at":"2026-07-04T14:15:08.947282Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:15:08.947282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PSfBkDfOrwEwtVgevdIS8ThVWN2+iDkiCd9gfta0sRro48jorl5LlLRgzNn589aNZgyKRRmw1on/NjuJn2D+CQ==","signature_status":"signed_v1","signed_at":"2026-07-04T14:15:08.947730Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9706009","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5f4d67861ee0995742591b05c54bd491990a2b5718837d9d2798a23a740913bf","sha256:2ee1c3b9c56d6d1bba16fb5155793b50fdf7aeb0de419e228a243784b069c71d"],"state_sha256":"98a899dcc5dce4b3d0512c6422624db73f17ec48275ec7cc33971e5a7fc2043d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UZyhmZ8gysD7b2pxeA8MybaLO8V82ztKWEhQf/2+qvxy9SZhxn9nJZcVnU5GeF3H55YR87iwLS/RH0dbVzQbBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T00:29:56.293764Z","bundle_sha256":"fd8cf6d5f217494176f34e64a02f841627d46dd9d73cc74ff50d4ad0a53b005c"}}