{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:3VZ6ZD35PTAUHSR3O72RVMXDJO","short_pith_number":"pith:3VZ6ZD35","canonical_record":{"source":{"id":"1106.3507","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-17T15:01:12Z","cross_cats_sorted":[],"title_canon_sha256":"1c6b7e957ca7ef69b7758b97e9e20ad30a8abbb3df5180432f7f64d2b954eea5","abstract_canon_sha256":"c35a6a467c276315ed00878df8997e02bc3f1e220e42c8a96a465a74d67b7998"},"schema_version":"1.0"},"canonical_sha256":"dd73ec8f7d7cc143ca3b77f51ab2e34ba4fb20095d04a56d6f4e2737b3e95553","source":{"kind":"arxiv","id":"1106.3507","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.3507","created_at":"2026-05-18T04:19:52Z"},{"alias_kind":"arxiv_version","alias_value":"1106.3507v1","created_at":"2026-05-18T04:19:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.3507","created_at":"2026-05-18T04:19:52Z"},{"alias_kind":"pith_short_12","alias_value":"3VZ6ZD35PTAU","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"3VZ6ZD35PTAUHSR3","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"3VZ6ZD35","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:3VZ6ZD35PTAUHSR3O72RVMXDJO","target":"record","payload":{"canonical_record":{"source":{"id":"1106.3507","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-17T15:01:12Z","cross_cats_sorted":[],"title_canon_sha256":"1c6b7e957ca7ef69b7758b97e9e20ad30a8abbb3df5180432f7f64d2b954eea5","abstract_canon_sha256":"c35a6a467c276315ed00878df8997e02bc3f1e220e42c8a96a465a74d67b7998"},"schema_version":"1.0"},"canonical_sha256":"dd73ec8f7d7cc143ca3b77f51ab2e34ba4fb20095d04a56d6f4e2737b3e95553","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:19:52.605066Z","signature_b64":"1JCtBvyakYuivC1KYUWiKJcUlJqTImcSYhjWEHlHe01ru17j65fqqfn2qLUWqXHtFym1+PycWix40ALLtrygDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dd73ec8f7d7cc143ca3b77f51ab2e34ba4fb20095d04a56d6f4e2737b3e95553","last_reissued_at":"2026-05-18T04:19:52.604543Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:19:52.604543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.3507","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":"2026-05-18T04:19:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m1gua4zrzi3bwhtJFMRvocYjK1liBk/Z5+wqH5c1myf/bCgN0xVebBeICeXkpsS3spuw8EAmuuenqbnIBGYBCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:21:26.583927Z"},"content_sha256":"bd5a5eb9d4e7c667f075f74a1585b49d2b5f1ee025398227cfbf75b037b172a1","schema_version":"1.0","event_id":"sha256:bd5a5eb9d4e7c667f075f74a1585b49d2b5f1ee025398227cfbf75b037b172a1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:3VZ6ZD35PTAUHSR3O72RVMXDJO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Long-term AGN variability and the case of GSN 069","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrew Read, Emilio Alvarez, Giovanni Miniutti, Pilar Esquej, Richard Saxton","submitted_at":"2011-06-17T15:01:12Z","abstract_excerpt":"We report on a study of long-term flux variations in a sample of more than 1000 AGN observed with ROSAT and in the XMM-Newton slew survey. Over a period of 3-19 years, NLS1 galaxies as a class are found to be only slightly more variable than broad line Seyfert galaxies, despite the strong short term variability seen in some bright nearby NLS1s. Contrary to expectations, it is Seyfert II galaxies that exhibit the greatest flux volatility. One particular Sy II, which has brightened by a factor > 300 over 15 years, has been monitored in detail with Swift and XMM. The spectrum is extremely soft (k"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.3507","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":"2026-05-18T04:19:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mbRd7gkMjk7uNdq8t8+WnO1LkZCwL8fd/1FNyjNh2/hSuBM12ftQUdA4H4rtBtZxEpPgge98Nyywq+W1BYfdBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:21:26.584588Z"},"content_sha256":"38d1c198c7f8ad7a1a884e8fe836fe3c3a15a3998e497036453c5a66ccf3e756","schema_version":"1.0","event_id":"sha256:38d1c198c7f8ad7a1a884e8fe836fe3c3a15a3998e497036453c5a66ccf3e756"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3VZ6ZD35PTAUHSR3O72RVMXDJO/bundle.json","state_url":"https://pith.science/pith/3VZ6ZD35PTAUHSR3O72RVMXDJO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3VZ6ZD35PTAUHSR3O72RVMXDJO/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":"2026-05-26T23:21:26Z","links":{"resolver":"https://pith.science/pith/3VZ6ZD35PTAUHSR3O72RVMXDJO","bundle":"https://pith.science/pith/3VZ6ZD35PTAUHSR3O72RVMXDJO/bundle.json","state":"https://pith.science/pith/3VZ6ZD35PTAUHSR3O72RVMXDJO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3VZ6ZD35PTAUHSR3O72RVMXDJO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:3VZ6ZD35PTAUHSR3O72RVMXDJO","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":"c35a6a467c276315ed00878df8997e02bc3f1e220e42c8a96a465a74d67b7998","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-17T15:01:12Z","title_canon_sha256":"1c6b7e957ca7ef69b7758b97e9e20ad30a8abbb3df5180432f7f64d2b954eea5"},"schema_version":"1.0","source":{"id":"1106.3507","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.3507","created_at":"2026-05-18T04:19:52Z"},{"alias_kind":"arxiv_version","alias_value":"1106.3507v1","created_at":"2026-05-18T04:19:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.3507","created_at":"2026-05-18T04:19:52Z"},{"alias_kind":"pith_short_12","alias_value":"3VZ6ZD35PTAU","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"3VZ6ZD35PTAUHSR3","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"3VZ6ZD35","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:38d1c198c7f8ad7a1a884e8fe836fe3c3a15a3998e497036453c5a66ccf3e756","target":"graph","created_at":"2026-05-18T04:19:52Z","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 report on a study of long-term flux variations in a sample of more than 1000 AGN observed with ROSAT and in the XMM-Newton slew survey. Over a period of 3-19 years, NLS1 galaxies as a class are found to be only slightly more variable than broad line Seyfert galaxies, despite the strong short term variability seen in some bright nearby NLS1s. Contrary to expectations, it is Seyfert II galaxies that exhibit the greatest flux volatility. One particular Sy II, which has brightened by a factor > 300 over 15 years, has been monitored in detail with Swift and XMM. The spectrum is extremely soft (k","authors_text":"Andrew Read, Emilio Alvarez, Giovanni Miniutti, Pilar Esquej, Richard Saxton","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-17T15:01:12Z","title":"Long-term AGN variability and the case of GSN 069"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.3507","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:bd5a5eb9d4e7c667f075f74a1585b49d2b5f1ee025398227cfbf75b037b172a1","target":"record","created_at":"2026-05-18T04:19:52Z","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":"c35a6a467c276315ed00878df8997e02bc3f1e220e42c8a96a465a74d67b7998","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-06-17T15:01:12Z","title_canon_sha256":"1c6b7e957ca7ef69b7758b97e9e20ad30a8abbb3df5180432f7f64d2b954eea5"},"schema_version":"1.0","source":{"id":"1106.3507","kind":"arxiv","version":1}},"canonical_sha256":"dd73ec8f7d7cc143ca3b77f51ab2e34ba4fb20095d04a56d6f4e2737b3e95553","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dd73ec8f7d7cc143ca3b77f51ab2e34ba4fb20095d04a56d6f4e2737b3e95553","first_computed_at":"2026-05-18T04:19:52.604543Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:19:52.604543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1JCtBvyakYuivC1KYUWiKJcUlJqTImcSYhjWEHlHe01ru17j65fqqfn2qLUWqXHtFym1+PycWix40ALLtrygDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:19:52.605066Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.3507","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bd5a5eb9d4e7c667f075f74a1585b49d2b5f1ee025398227cfbf75b037b172a1","sha256:38d1c198c7f8ad7a1a884e8fe836fe3c3a15a3998e497036453c5a66ccf3e756"],"state_sha256":"826b4a4353608436951d06b2982b5d2303c203f4cabb1b9994107399283b6e4e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Srd4P0CSP+meKbf6vAEaN9ud5DqnqVWIrc8VR0NfYmCP3GRt1ybCim/3wftNYDQjI5aN1vUCQX0pw15atqwJBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:21:26.587773Z","bundle_sha256":"0bdb0451717db47e8f7cabbf5216edf51a0910d3bb9318f04e659aac7f522a61"}}