{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:5KFEI7UKZYL7NADSPOPBOZCXYX","short_pith_number":"pith:5KFEI7UK","canonical_record":{"source":{"id":"1902.03328","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-02-08T23:48:18Z","cross_cats_sorted":[],"title_canon_sha256":"78585e9eaaa205a9a443403f76cfad41e92bac0fbe9d32e30498dc063a17d209","abstract_canon_sha256":"8a63e98469f5651cd3e02bc77ee423ab3b1f55a05db4bf87c7c72b200539225e"},"schema_version":"1.0"},"canonical_sha256":"ea8a447e8ace17f680727b9e176457c5db945ac85f5c3bc1ede0b1ce12fb0a37","source":{"kind":"arxiv","id":"1902.03328","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.03328","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"arxiv_version","alias_value":"1902.03328v1","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.03328","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"pith_short_12","alias_value":"5KFEI7UKZYL7","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5KFEI7UKZYL7NADS","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5KFEI7UK","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:5KFEI7UKZYL7NADSPOPBOZCXYX","target":"record","payload":{"canonical_record":{"source":{"id":"1902.03328","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-02-08T23:48:18Z","cross_cats_sorted":[],"title_canon_sha256":"78585e9eaaa205a9a443403f76cfad41e92bac0fbe9d32e30498dc063a17d209","abstract_canon_sha256":"8a63e98469f5651cd3e02bc77ee423ab3b1f55a05db4bf87c7c72b200539225e"},"schema_version":"1.0"},"canonical_sha256":"ea8a447e8ace17f680727b9e176457c5db945ac85f5c3bc1ede0b1ce12fb0a37","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:39.233229Z","signature_b64":"X6Q8MPC8zHP/KJ7kHEZhWojXJ3kRgWWJF/akriwEQRhxK2nQt8e4FCpnB1hPVurvnic3be7eRUscfelRwWy8BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ea8a447e8ace17f680727b9e176457c5db945ac85f5c3bc1ede0b1ce12fb0a37","last_reissued_at":"2026-05-17T23:49:39.232619Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:39.232619Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.03328","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":"2026-05-17T23:49:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g6SuD+DR3P0OkZa/ANWHsAz2XciMQejicyqByOcrRdxD3rGtROTNNON9ZyLzPRe33GthZinUeH39HqiNqovTBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T18:12:34.920772Z"},"content_sha256":"94793e6e008021b916b0a7430ec354468b8a02e83391b8a71c8f7b11050c2c6a","schema_version":"1.0","event_id":"sha256:94793e6e008021b916b0a7430ec354468b8a02e83391b8a71c8f7b11050c2c6a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:5KFEI7UKZYL7NADSPOPBOZCXYX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sub-Eddington super-massive black hole activity in Fornax early type galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Brendan Miller, Edmund Hodges-Kluck, Elena Gallo, Laura Ferrarese, Nathan Lee, Patrick C\\^ot\\'e, Rich Plotkin, Tommaso Treu, Vivienne Baldassare","submitted_at":"2019-02-08T23:48:18Z","abstract_excerpt":"We characterize the incidence and intensity of low-level super-massive black hole activity within the Fornax cluster, through X-ray observations of the nuclei of 29 quiescent early-type galaxies. Using the \\textit{Chandra X-ray Telescope}, we target 17 galaxies from the HST Fornax Cluster Survey, down to a uniform (3$\\sigma$) limiting X-ray luminosity threshold of $5\\cdot10^{38}$ergs$^{-1}$, which we combine with deeper, archival observations for an additional 12 galaxies. A nuclear X-ray point-source is detected in 11 out of 29 targets. After accounting for the low mass X-ray binary contamina"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.03328","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":"2026-05-17T23:49:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jX8dxEb6aAOGZqrzvlPjz6hkZnLzFkKCPFpJAZWm15RONhh3uGPnuxzITAgClKLD7dYFhWF/rBFgZo1Hr7h1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T18:12:34.921120Z"},"content_sha256":"aee72acabb549594aed870f0f9c97ccf79d94eefc1b01d6241b714d92364b5f5","schema_version":"1.0","event_id":"sha256:aee72acabb549594aed870f0f9c97ccf79d94eefc1b01d6241b714d92364b5f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5KFEI7UKZYL7NADSPOPBOZCXYX/bundle.json","state_url":"https://pith.science/pith/5KFEI7UKZYL7NADSPOPBOZCXYX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5KFEI7UKZYL7NADSPOPBOZCXYX/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":"2026-07-04T18:12:34Z","links":{"resolver":"https://pith.science/pith/5KFEI7UKZYL7NADSPOPBOZCXYX","bundle":"https://pith.science/pith/5KFEI7UKZYL7NADSPOPBOZCXYX/bundle.json","state":"https://pith.science/pith/5KFEI7UKZYL7NADSPOPBOZCXYX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5KFEI7UKZYL7NADSPOPBOZCXYX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:5KFEI7UKZYL7NADSPOPBOZCXYX","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":"8a63e98469f5651cd3e02bc77ee423ab3b1f55a05db4bf87c7c72b200539225e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-02-08T23:48:18Z","title_canon_sha256":"78585e9eaaa205a9a443403f76cfad41e92bac0fbe9d32e30498dc063a17d209"},"schema_version":"1.0","source":{"id":"1902.03328","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.03328","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"arxiv_version","alias_value":"1902.03328v1","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.03328","created_at":"2026-05-17T23:49:39Z"},{"alias_kind":"pith_short_12","alias_value":"5KFEI7UKZYL7","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"5KFEI7UKZYL7NADS","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"5KFEI7UK","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:aee72acabb549594aed870f0f9c97ccf79d94eefc1b01d6241b714d92364b5f5","target":"graph","created_at":"2026-05-17T23:49:39Z","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 characterize the incidence and intensity of low-level super-massive black hole activity within the Fornax cluster, through X-ray observations of the nuclei of 29 quiescent early-type galaxies. Using the \\textit{Chandra X-ray Telescope}, we target 17 galaxies from the HST Fornax Cluster Survey, down to a uniform (3$\\sigma$) limiting X-ray luminosity threshold of $5\\cdot10^{38}$ergs$^{-1}$, which we combine with deeper, archival observations for an additional 12 galaxies. A nuclear X-ray point-source is detected in 11 out of 29 targets. After accounting for the low mass X-ray binary contamina","authors_text":"Brendan Miller, Edmund Hodges-Kluck, Elena Gallo, Laura Ferrarese, Nathan Lee, Patrick C\\^ot\\'e, Rich Plotkin, Tommaso Treu, Vivienne Baldassare","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-02-08T23:48:18Z","title":"Sub-Eddington super-massive black hole activity in Fornax early type galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.03328","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":"sha256:94793e6e008021b916b0a7430ec354468b8a02e83391b8a71c8f7b11050c2c6a","target":"record","created_at":"2026-05-17T23:49:39Z","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":"8a63e98469f5651cd3e02bc77ee423ab3b1f55a05db4bf87c7c72b200539225e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-02-08T23:48:18Z","title_canon_sha256":"78585e9eaaa205a9a443403f76cfad41e92bac0fbe9d32e30498dc063a17d209"},"schema_version":"1.0","source":{"id":"1902.03328","kind":"arxiv","version":1}},"canonical_sha256":"ea8a447e8ace17f680727b9e176457c5db945ac85f5c3bc1ede0b1ce12fb0a37","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ea8a447e8ace17f680727b9e176457c5db945ac85f5c3bc1ede0b1ce12fb0a37","first_computed_at":"2026-05-17T23:49:39.232619Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:39.232619Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X6Q8MPC8zHP/KJ7kHEZhWojXJ3kRgWWJF/akriwEQRhxK2nQt8e4FCpnB1hPVurvnic3be7eRUscfelRwWy8BQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:39.233229Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.03328","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:94793e6e008021b916b0a7430ec354468b8a02e83391b8a71c8f7b11050c2c6a","sha256:aee72acabb549594aed870f0f9c97ccf79d94eefc1b01d6241b714d92364b5f5"],"state_sha256":"12f67a7186fe85cbf2bbee10f21602b6a45b7a0c60441bf5c3a4768adb8158be"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kcq2PgeHZ+4is4i7i8s7WeTQhoqUfYHxAM5tUWkShTrTufjJnWrAFgvLgLsTdUPI2YdZ7GAeCQKIKXjRu+wpAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T18:12:34.923018Z","bundle_sha256":"ff8d19e2b76a5f42868f7b388e6ed28c2a0376311225db95b4d9a1d7f5061dd2"}}