{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:SIAZJTWCCLDIQXME2UT3ZQVEER","short_pith_number":"pith:SIAZJTWC","canonical_record":{"source":{"id":"astro-ph/0101324","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-18T10:37:20Z","cross_cats_sorted":[],"title_canon_sha256":"a174bb8f6b2e2eed65799cfe2a9293afee508805af94b6191cd378f5a1c80fca","abstract_canon_sha256":"2ff0e555111d63314470c2159cfb3ea13a133178a57cf18752bd8759d96983a4"},"schema_version":"1.0"},"canonical_sha256":"920194cec212c6885d84d527bcc2a4247507308319ceb9610803e19f581061b1","source":{"kind":"arxiv","id":"astro-ph/0101324","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0101324","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0101324v1","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0101324","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"pith_short_12","alias_value":"SIAZJTWCCLDI","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"pith_short_16","alias_value":"SIAZJTWCCLDIQXME","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"pith_short_8","alias_value":"SIAZJTWC","created_at":"2026-07-04T16:22:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:SIAZJTWCCLDIQXME2UT3ZQVEER","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0101324","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-18T10:37:20Z","cross_cats_sorted":[],"title_canon_sha256":"a174bb8f6b2e2eed65799cfe2a9293afee508805af94b6191cd378f5a1c80fca","abstract_canon_sha256":"2ff0e555111d63314470c2159cfb3ea13a133178a57cf18752bd8759d96983a4"},"schema_version":"1.0"},"canonical_sha256":"920194cec212c6885d84d527bcc2a4247507308319ceb9610803e19f581061b1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:22:35.640152Z","signature_b64":"Sz7rBaDcEolabB22eRd9ZCzpdMy/9eGQiEae1z6jKY8IfAukRGTckmqQk+XkxnxkG6/bkOn55G3Dol6jxsRZAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"920194cec212c6885d84d527bcc2a4247507308319ceb9610803e19f581061b1","last_reissued_at":"2026-07-04T16:22:35.639742Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:22:35.639742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0101324","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":"2026-07-04T16:22:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4JCAjZVb+WlX1k4EIRR/gGWzefi62/A1PI3o9j6+rtDGp/jSLb+Z+vAtjcMRCEk6jOt5Joop4WMk4toNv/cKBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T02:18:54.724506Z"},"content_sha256":"b73c5ff8736b4a8a67e7fb6cc2bde7b0afb1e8be6198097d1a7708dc2a14a068","schema_version":"1.0","event_id":"sha256:b73c5ff8736b4a8a67e7fb6cc2bde7b0afb1e8be6198097d1a7708dc2a14a068"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:SIAZJTWCCLDIQXME2UT3ZQVEER","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the Origin of the FeK$\\alpha$ Line in the Seyfert 2 Galaxy NGC 7172","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"G. Di Cocco, G.G.C. Palumbo, G. Malaguti, L. Bassani, L. Piro, M. Cappi, M. Dadina, M. Guainazzi, M. Trifoglio","submitted_at":"2001-01-18T10:37:20Z","abstract_excerpt":"The Seyfert 2 Galaxy NGC 7172 was observed twice by BeppoSAX narrow field instruments approximately one year apart. As found in previous observations, the source is variable on short time scales (hours) by a factor of $\\sim$30%, confirming the presence of a type 1 nucleus at the center. A strong flux variability (by a factor of 2) on a longer time scale was observed between the two observations. Indeed, in November 1997, the lowest flux ever recorded was detected by BeppoSAX. The broad band spectra obtained with the BeppoSAX narrow field instruments show marginal evidence of a reflection compo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0101324","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/0101324/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":"2026-07-04T16:22:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1VnPOo/lZl1I98qo5wlFig3rHUHu+9PEwGIxjDEYHQUL9kiLLVfVAYgZUN0vXvM0V5E5iuqhGSW8n0S7kSBlCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T02:18:54.725422Z"},"content_sha256":"754ce7ff44e5eb9910e6e06cc129ca1df4e8be8f448d025447848657c87ba617","schema_version":"1.0","event_id":"sha256:754ce7ff44e5eb9910e6e06cc129ca1df4e8be8f448d025447848657c87ba617"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SIAZJTWCCLDIQXME2UT3ZQVEER/bundle.json","state_url":"https://pith.science/pith/SIAZJTWCCLDIQXME2UT3ZQVEER/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SIAZJTWCCLDIQXME2UT3ZQVEER/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":"2026-08-14T02:18:54Z","links":{"resolver":"https://pith.science/pith/SIAZJTWCCLDIQXME2UT3ZQVEER","bundle":"https://pith.science/pith/SIAZJTWCCLDIQXME2UT3ZQVEER/bundle.json","state":"https://pith.science/pith/SIAZJTWCCLDIQXME2UT3ZQVEER/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SIAZJTWCCLDIQXME2UT3ZQVEER/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:SIAZJTWCCLDIQXME2UT3ZQVEER","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":"2ff0e555111d63314470c2159cfb3ea13a133178a57cf18752bd8759d96983a4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-18T10:37:20Z","title_canon_sha256":"a174bb8f6b2e2eed65799cfe2a9293afee508805af94b6191cd378f5a1c80fca"},"schema_version":"1.0","source":{"id":"astro-ph/0101324","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0101324","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0101324v1","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0101324","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"pith_short_12","alias_value":"SIAZJTWCCLDI","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"pith_short_16","alias_value":"SIAZJTWCCLDIQXME","created_at":"2026-07-04T16:22:35Z"},{"alias_kind":"pith_short_8","alias_value":"SIAZJTWC","created_at":"2026-07-04T16:22:35Z"}],"graph_snapshots":[{"event_id":"sha256:754ce7ff44e5eb9910e6e06cc129ca1df4e8be8f448d025447848657c87ba617","target":"graph","created_at":"2026-07-04T16:22:35Z","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/0101324/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Seyfert 2 Galaxy NGC 7172 was observed twice by BeppoSAX narrow field instruments approximately one year apart. As found in previous observations, the source is variable on short time scales (hours) by a factor of $\\sim$30%, confirming the presence of a type 1 nucleus at the center. A strong flux variability (by a factor of 2) on a longer time scale was observed between the two observations. Indeed, in November 1997, the lowest flux ever recorded was detected by BeppoSAX. The broad band spectra obtained with the BeppoSAX narrow field instruments show marginal evidence of a reflection compo","authors_text":"G. Di Cocco, G.G.C. Palumbo, G. Malaguti, L. Bassani, L. Piro, M. Cappi, M. Dadina, M. Guainazzi, M. Trifoglio","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-01-18T10:37:20Z","title":"On the Origin of the FeK$\\alpha$ Line in the Seyfert 2 Galaxy NGC 7172"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0101324","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:b73c5ff8736b4a8a67e7fb6cc2bde7b0afb1e8be6198097d1a7708dc2a14a068","target":"record","created_at":"2026-07-04T16:22:35Z","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":"2ff0e555111d63314470c2159cfb3ea13a133178a57cf18752bd8759d96983a4","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-01-18T10:37:20Z","title_canon_sha256":"a174bb8f6b2e2eed65799cfe2a9293afee508805af94b6191cd378f5a1c80fca"},"schema_version":"1.0","source":{"id":"astro-ph/0101324","kind":"arxiv","version":1}},"canonical_sha256":"920194cec212c6885d84d527bcc2a4247507308319ceb9610803e19f581061b1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"920194cec212c6885d84d527bcc2a4247507308319ceb9610803e19f581061b1","first_computed_at":"2026-07-04T16:22:35.639742Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:22:35.639742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Sz7rBaDcEolabB22eRd9ZCzpdMy/9eGQiEae1z6jKY8IfAukRGTckmqQk+XkxnxkG6/bkOn55G3Dol6jxsRZAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:22:35.640152Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0101324","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b73c5ff8736b4a8a67e7fb6cc2bde7b0afb1e8be6198097d1a7708dc2a14a068","sha256:754ce7ff44e5eb9910e6e06cc129ca1df4e8be8f448d025447848657c87ba617"],"state_sha256":"ff56e529868eaff9a34c6de8bb81c9c06631cdedd49c61af0f10ecd8c0825b50"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cw7PUMgzainAsKyGLHRJwwEWbx51kY5VCCfhDwoklQs3L8uI4cJcouHd67mn8Mcxv0+KwzJe2x1uN6dREjWDBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T02:18:54.801553Z","bundle_sha256":"67ce55818cdf0c20c12bc3a15a38883896b5d1fa95d90270bfd51f7e9c653618"}}