{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:GIQBEOUG47EICTV76DDOCNNXEE","short_pith_number":"pith:GIQBEOUG","canonical_record":{"source":{"id":"1209.1354","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-06T17:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"6c1968db72150ff7c975c02158754eed772b789b5a46e3ed1211a13f52ed4848","abstract_canon_sha256":"e15db9a55b985c178953b76079db2e4bb0bbdc7496acafd47747f37c24438095"},"schema_version":"1.0"},"canonical_sha256":"3220123a86e7c8814ebff0c6e135b72123360a1582c8a5cf1ec14717c41a8c54","source":{"kind":"arxiv","id":"1209.1354","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.1354","created_at":"2026-05-18T01:54:39Z"},{"alias_kind":"arxiv_version","alias_value":"1209.1354v1","created_at":"2026-05-18T01:54:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.1354","created_at":"2026-05-18T01:54:39Z"},{"alias_kind":"pith_short_12","alias_value":"GIQBEOUG47EI","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"GIQBEOUG47EICTV7","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"GIQBEOUG","created_at":"2026-05-18T12:27:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:GIQBEOUG47EICTV76DDOCNNXEE","target":"record","payload":{"canonical_record":{"source":{"id":"1209.1354","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-06T17:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"6c1968db72150ff7c975c02158754eed772b789b5a46e3ed1211a13f52ed4848","abstract_canon_sha256":"e15db9a55b985c178953b76079db2e4bb0bbdc7496acafd47747f37c24438095"},"schema_version":"1.0"},"canonical_sha256":"3220123a86e7c8814ebff0c6e135b72123360a1582c8a5cf1ec14717c41a8c54","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:39.183788Z","signature_b64":"YLU1LUoUfL+XJAq69aBr/x08tq3jSRBcyEB3esMVJVu6BuTRTbqgY6oxlePG1TnhhhorPE7G3SeNZomgjBmcAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3220123a86e7c8814ebff0c6e135b72123360a1582c8a5cf1ec14717c41a8c54","last_reissued_at":"2026-05-18T01:54:39.183123Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:39.183123Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.1354","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":"2026-05-18T01:54:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wsHIUSJznNXqzWc6knbCklpdj7UkmC9BibeDX8c6IFV5XCzGg1GdCrQUl4QOcDF/gk5ay0bUMEKoQbs44BPiCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:22:15.469438Z"},"content_sha256":"3e7b00b7c176ccc04eb3441a68cd5e907e3e045fe3721f97ff3f18160be3df5d","schema_version":"1.0","event_id":"sha256:3e7b00b7c176ccc04eb3441a68cd5e907e3e045fe3721f97ff3f18160be3df5d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:GIQBEOUG47EICTV76DDOCNNXEE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of an active supermassive black hole in the bulge-less galaxy NGC 4561","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"C.Araya Salvo, F. Fiore, H. Ghosh, L. Ferrarese, S. Mathur","submitted_at":"2012-09-06T17:58:44Z","abstract_excerpt":"We present XMM-Newton observations of the Chandra-detected nuclear X-ray source in NGC 4561. The hard X-ray spectrum can be described by a model composed of an absorbed power-law with Gamma= 2.5^{+0.4}_{-0.3}, and column density N_H=1.9^{+0.1}_{-0.2} times 10^{22} atoms cm^{-2}. The absorption corrected luminosity of the source is L(0.2 - 10.0 keV) = 2.5 times 10^{41} ergs s^{-1}, with bolometric luminosity over 3 \\times 10^{42} ergs s^{-1}. Based on the spectrum and the luminosity, we identify the nuclear X-ray source in NGC 4561 to be an AGN, with a black hole of mass M_BH > 20,000 solar mas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.1354","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":"2026-05-18T01:54:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jpn6YvYlLgLl8ignULTkW/aITi05SNB4ahBOrF5NEOYRO2pcyvODR01Jf3ZzRayeY2wCbX2Iugvp7z7hKN4lCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:22:15.470092Z"},"content_sha256":"5786fcaf5f557619fd493a8b4484d315d58570b378b3955e6216fd01e10311f1","schema_version":"1.0","event_id":"sha256:5786fcaf5f557619fd493a8b4484d315d58570b378b3955e6216fd01e10311f1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GIQBEOUG47EICTV76DDOCNNXEE/bundle.json","state_url":"https://pith.science/pith/GIQBEOUG47EICTV76DDOCNNXEE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GIQBEOUG47EICTV76DDOCNNXEE/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":"2026-05-25T19:22:15Z","links":{"resolver":"https://pith.science/pith/GIQBEOUG47EICTV76DDOCNNXEE","bundle":"https://pith.science/pith/GIQBEOUG47EICTV76DDOCNNXEE/bundle.json","state":"https://pith.science/pith/GIQBEOUG47EICTV76DDOCNNXEE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GIQBEOUG47EICTV76DDOCNNXEE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:GIQBEOUG47EICTV76DDOCNNXEE","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":"e15db9a55b985c178953b76079db2e4bb0bbdc7496acafd47747f37c24438095","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-06T17:58:44Z","title_canon_sha256":"6c1968db72150ff7c975c02158754eed772b789b5a46e3ed1211a13f52ed4848"},"schema_version":"1.0","source":{"id":"1209.1354","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.1354","created_at":"2026-05-18T01:54:39Z"},{"alias_kind":"arxiv_version","alias_value":"1209.1354v1","created_at":"2026-05-18T01:54:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.1354","created_at":"2026-05-18T01:54:39Z"},{"alias_kind":"pith_short_12","alias_value":"GIQBEOUG47EI","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"GIQBEOUG47EICTV7","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"GIQBEOUG","created_at":"2026-05-18T12:27:06Z"}],"graph_snapshots":[{"event_id":"sha256:5786fcaf5f557619fd493a8b4484d315d58570b378b3955e6216fd01e10311f1","target":"graph","created_at":"2026-05-18T01:54:39Z","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 present XMM-Newton observations of the Chandra-detected nuclear X-ray source in NGC 4561. The hard X-ray spectrum can be described by a model composed of an absorbed power-law with Gamma= 2.5^{+0.4}_{-0.3}, and column density N_H=1.9^{+0.1}_{-0.2} times 10^{22} atoms cm^{-2}. The absorption corrected luminosity of the source is L(0.2 - 10.0 keV) = 2.5 times 10^{41} ergs s^{-1}, with bolometric luminosity over 3 \\times 10^{42} ergs s^{-1}. Based on the spectrum and the luminosity, we identify the nuclear X-ray source in NGC 4561 to be an AGN, with a black hole of mass M_BH > 20,000 solar mas","authors_text":"C.Araya Salvo, F. Fiore, H. Ghosh, L. Ferrarese, S. Mathur","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-06T17:58:44Z","title":"Discovery of an active supermassive black hole in the bulge-less galaxy NGC 4561"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.1354","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":"sha256:3e7b00b7c176ccc04eb3441a68cd5e907e3e045fe3721f97ff3f18160be3df5d","target":"record","created_at":"2026-05-18T01:54:39Z","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":"e15db9a55b985c178953b76079db2e4bb0bbdc7496acafd47747f37c24438095","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-06T17:58:44Z","title_canon_sha256":"6c1968db72150ff7c975c02158754eed772b789b5a46e3ed1211a13f52ed4848"},"schema_version":"1.0","source":{"id":"1209.1354","kind":"arxiv","version":1}},"canonical_sha256":"3220123a86e7c8814ebff0c6e135b72123360a1582c8a5cf1ec14717c41a8c54","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3220123a86e7c8814ebff0c6e135b72123360a1582c8a5cf1ec14717c41a8c54","first_computed_at":"2026-05-18T01:54:39.183123Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:39.183123Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YLU1LUoUfL+XJAq69aBr/x08tq3jSRBcyEB3esMVJVu6BuTRTbqgY6oxlePG1TnhhhorPE7G3SeNZomgjBmcAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:39.183788Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.1354","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e7b00b7c176ccc04eb3441a68cd5e907e3e045fe3721f97ff3f18160be3df5d","sha256:5786fcaf5f557619fd493a8b4484d315d58570b378b3955e6216fd01e10311f1"],"state_sha256":"aa6a901e4cc942483d02c3038cc99cc0b18e237a9a652eea8ff71f95f8acdec4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Oeg0Zv6U35rhTYaRONYCEWO2vIOoj2dDw0KYnFFXiHSHbxI9h7EhaVLoYHRnzLwJ1yR8TUDNJ5WBNVSY9bAIBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:22:15.474445Z","bundle_sha256":"a62119ea174d9e9fd10d1f988ff2ba791884d3f33c39342850923652fc510f1d"}}