{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1996:2R5IK5EUGC3FEZVCVOOQVYO5KK","short_pith_number":"pith:2R5IK5EU","canonical_record":{"source":{"id":"astro-ph/9612038","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-12-04T13:47:38Z","cross_cats_sorted":[],"title_canon_sha256":"e801be6d8c1894580e18968f4521334e0585400ac9e5cdfbf1d9a9548e119199","abstract_canon_sha256":"71cbd5c6521d448406b930088a759bf66e1c887ab5bc44e2c4464bb58834720e"},"schema_version":"1.0"},"canonical_sha256":"d47a85749430b65266a2ab9d0ae1dd52a7a4c1071de37e8259f274da714d17a6","source":{"kind":"arxiv","id":"astro-ph/9612038","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9612038","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9612038v1","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9612038","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"pith_short_12","alias_value":"2R5IK5EUGC3F","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"pith_short_16","alias_value":"2R5IK5EUGC3FEZVC","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"pith_short_8","alias_value":"2R5IK5EU","created_at":"2026-07-04T14:14:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1996:2R5IK5EUGC3FEZVCVOOQVYO5KK","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9612038","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-12-04T13:47:38Z","cross_cats_sorted":[],"title_canon_sha256":"e801be6d8c1894580e18968f4521334e0585400ac9e5cdfbf1d9a9548e119199","abstract_canon_sha256":"71cbd5c6521d448406b930088a759bf66e1c887ab5bc44e2c4464bb58834720e"},"schema_version":"1.0"},"canonical_sha256":"d47a85749430b65266a2ab9d0ae1dd52a7a4c1071de37e8259f274da714d17a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:14:59.164908Z","signature_b64":"xyQYRgfpI1apfd9FYZkWWfQ6glMudg72/n9mPFXCMpa3O/WEIS2SW0vqLmR8D/klGUCcmg1scNG7CRqp6S2uCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d47a85749430b65266a2ab9d0ae1dd52a7a4c1071de37e8259f274da714d17a6","last_reissued_at":"2026-07-04T14:14:59.164514Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:14:59.164514Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9612038","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":"2026-07-04T14:14:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6JcOvOSATgmQxUj3ivgqkPkhXWPej94REQE5OpvPFBOeJY3JFmbERjRpjY6yPnZFauq+0Jrs2OKcbohB/kRGDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T10:33:40.938590Z"},"content_sha256":"eba6dd380beca13b48edd6585058e8a745603c1528b4208eb5bdbb04d63c6a12","schema_version":"1.0","event_id":"sha256:eba6dd380beca13b48edd6585058e8a745603c1528b4208eb5bdbb04d63c6a12"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1996:2R5IK5EUGC3FEZVCVOOQVYO5KK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A ROSAT observation of the warm-absorbed soft X-ray spectrum of NGC 4051","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D), Henner Fink (MPE Garching, Stefanie Komossa","submitted_at":"1996-12-04T13:47:38Z","abstract_excerpt":"We present and analyze a pointed ROSAT PSPC observation of the Seyfert galaxy NGC 4051. The X-ray spectrum consists of a powerlaw modified by absorption edges and an additional soft excess during the high-state in source flux. Modeling the spectrum in terms of warm absorption yields a large column density of the ionized material of log N_w = 22.7 and an ionization parameter of log U = 0.4. These properties are essentially constant throughout the observation, whereas the luminosity changes by more than a factor of 4. The underlying powerlaw is in its steepest observed state, with a photon index"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9612038","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/9612038/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":"2026-07-04T14:14:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nilm1UJy2t4FaDaNOSxRRfYJZUNSRmUr0f7gOaxm1ottQ0+JOm03N7d2m1P/+uueD8DMzdkx97mVtcrp+Ba6Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T10:33:40.939504Z"},"content_sha256":"7a2a0010eec17e83a71d233069603a4c482b49b5fd7ae3b7d67cead124acd308","schema_version":"1.0","event_id":"sha256:7a2a0010eec17e83a71d233069603a4c482b49b5fd7ae3b7d67cead124acd308"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2R5IK5EUGC3FEZVCVOOQVYO5KK/bundle.json","state_url":"https://pith.science/pith/2R5IK5EUGC3FEZVCVOOQVYO5KK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2R5IK5EUGC3FEZVCVOOQVYO5KK/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":"2026-08-05T10:33:40Z","links":{"resolver":"https://pith.science/pith/2R5IK5EUGC3FEZVCVOOQVYO5KK","bundle":"https://pith.science/pith/2R5IK5EUGC3FEZVCVOOQVYO5KK/bundle.json","state":"https://pith.science/pith/2R5IK5EUGC3FEZVCVOOQVYO5KK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2R5IK5EUGC3FEZVCVOOQVYO5KK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1996:2R5IK5EUGC3FEZVCVOOQVYO5KK","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":"71cbd5c6521d448406b930088a759bf66e1c887ab5bc44e2c4464bb58834720e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1996-12-04T13:47:38Z","title_canon_sha256":"e801be6d8c1894580e18968f4521334e0585400ac9e5cdfbf1d9a9548e119199"},"schema_version":"1.0","source":{"id":"astro-ph/9612038","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9612038","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9612038v1","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9612038","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"pith_short_12","alias_value":"2R5IK5EUGC3F","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"pith_short_16","alias_value":"2R5IK5EUGC3FEZVC","created_at":"2026-07-04T14:14:59Z"},{"alias_kind":"pith_short_8","alias_value":"2R5IK5EU","created_at":"2026-07-04T14:14:59Z"}],"graph_snapshots":[{"event_id":"sha256:7a2a0010eec17e83a71d233069603a4c482b49b5fd7ae3b7d67cead124acd308","target":"graph","created_at":"2026-07-04T14:14:59Z","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/9612038/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present and analyze a pointed ROSAT PSPC observation of the Seyfert galaxy NGC 4051. The X-ray spectrum consists of a powerlaw modified by absorption edges and an additional soft excess during the high-state in source flux. Modeling the spectrum in terms of warm absorption yields a large column density of the ionized material of log N_w = 22.7 and an ionization parameter of log U = 0.4. These properties are essentially constant throughout the observation, whereas the luminosity changes by more than a factor of 4. The underlying powerlaw is in its steepest observed state, with a photon index","authors_text":"D), Henner Fink (MPE Garching, Stefanie Komossa","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1996-12-04T13:47:38Z","title":"A ROSAT observation of the warm-absorbed soft X-ray spectrum of NGC 4051"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9612038","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:eba6dd380beca13b48edd6585058e8a745603c1528b4208eb5bdbb04d63c6a12","target":"record","created_at":"2026-07-04T14:14:59Z","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":"71cbd5c6521d448406b930088a759bf66e1c887ab5bc44e2c4464bb58834720e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1996-12-04T13:47:38Z","title_canon_sha256":"e801be6d8c1894580e18968f4521334e0585400ac9e5cdfbf1d9a9548e119199"},"schema_version":"1.0","source":{"id":"astro-ph/9612038","kind":"arxiv","version":1}},"canonical_sha256":"d47a85749430b65266a2ab9d0ae1dd52a7a4c1071de37e8259f274da714d17a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d47a85749430b65266a2ab9d0ae1dd52a7a4c1071de37e8259f274da714d17a6","first_computed_at":"2026-07-04T14:14:59.164514Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:14:59.164514Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xyQYRgfpI1apfd9FYZkWWfQ6glMudg72/n9mPFXCMpa3O/WEIS2SW0vqLmR8D/klGUCcmg1scNG7CRqp6S2uCg==","signature_status":"signed_v1","signed_at":"2026-07-04T14:14:59.164908Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9612038","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eba6dd380beca13b48edd6585058e8a745603c1528b4208eb5bdbb04d63c6a12","sha256:7a2a0010eec17e83a71d233069603a4c482b49b5fd7ae3b7d67cead124acd308"],"state_sha256":"7945e0edb041f0e2fe9b8f0998f36ee92ba64169da606bdf27cfe2b8cba994a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sKXMKz493qn4fFmDrP8IOQHs+ItAyKM61dDWZxdtHVd6Yu4yz4YAgYnPZBa4dNr/x1FQtJYCjkX4XfKLb26+AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T10:33:40.989181Z","bundle_sha256":"c0fa8179fcdc43b18c2a628c3bdc5380aa42554b062ddfc78265a07902dbfa02"}}