{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:GND44DITQOXMLATJJALN6DARRA","short_pith_number":"pith:GND44DIT","canonical_record":{"source":{"id":"2001.08208","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-22T18:56:01Z","cross_cats_sorted":[],"title_canon_sha256":"3ffed33f6c02afd47732a1997bdd8d96da6b997718ab89d5ada16bbcc59c99bf","abstract_canon_sha256":"d75de91f6ba8257b31a9f0545e3fde0483ed05050952e6044cddbc34157d9d37"},"schema_version":"1.0"},"canonical_sha256":"3347ce0d1383aec582694816df0c11881964f7c82830fc979a11503615b2c5e7","source":{"kind":"arxiv","id":"2001.08208","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.08208","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"arxiv_version","alias_value":"2001.08208v1","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.08208","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"pith_short_12","alias_value":"GND44DITQOXM","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"pith_short_16","alias_value":"GND44DITQOXMLATJ","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"pith_short_8","alias_value":"GND44DIT","created_at":"2026-07-05T00:38:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:GND44DITQOXMLATJJALN6DARRA","target":"record","payload":{"canonical_record":{"source":{"id":"2001.08208","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-22T18:56:01Z","cross_cats_sorted":[],"title_canon_sha256":"3ffed33f6c02afd47732a1997bdd8d96da6b997718ab89d5ada16bbcc59c99bf","abstract_canon_sha256":"d75de91f6ba8257b31a9f0545e3fde0483ed05050952e6044cddbc34157d9d37"},"schema_version":"1.0"},"canonical_sha256":"3347ce0d1383aec582694816df0c11881964f7c82830fc979a11503615b2c5e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:38:12.236337Z","signature_b64":"QXsIx+tiyx1k99zFm53qnsaCtiOz+cDt4PnXwKl+6+uXSSFrowjFsgH48CBOsrC7eW0F0icPC5jnVDmqBKXZAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3347ce0d1383aec582694816df0c11881964f7c82830fc979a11503615b2c5e7","last_reissued_at":"2026-07-05T00:38:12.235916Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:38:12.235916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.08208","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":"2026-07-05T00:38:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jI1W4IpWeq+QUWtF2N4RDh3oR4tKdYfyOe+R6eIA/F2Uf5Mgp7u02V2KzoYyDhfmddwnVxgEfjWwiqdYmqYuCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T07:20:51.875983Z"},"content_sha256":"b8023491d868e2e4cf69331629fae2cad065e876bdf9c22b52762fcd45c6c69d","schema_version":"1.0","event_id":"sha256:b8023491d868e2e4cf69331629fae2cad065e876bdf9c22b52762fcd45c6c69d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:GND44DITQOXMLATJJALN6DARRA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Searching for Ultra-fast Outflows in AGN using Variability Spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. M. Joyce, D. J. K. Buisson, F. F\\\"urst, G. A. Matzeu, L. Mallick, M. L. Parker, M. Santos-Lle\\'o, N. Alvarez Crespo, N. Schartel, W. Alston, Z. Igo","submitted_at":"2020-01-22T18:56:01Z","abstract_excerpt":"We present a qualitative search for ultra-fast outflows (UFOs) in excess variance spectra of radio-quiet active galactic nuclei (AGN). We analyse 42 sources from the Tombesi et al. (2010) spectroscopic UFO detection sample, and an additional 22 different sources from the Kara et al. (2016) variability sample. A total of 58 sources have sufficient observational data from XMM-Newton EPIC-pn and variability for an excess variance spectrum to be calculated. We examine these spectra for peaks corresponding to variable blue-shifted H- and He-like ion absorption lines from UFOs. We find good evidence"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.08208","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/2001.08208/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":"2026-07-05T00:38:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p3izCIBHYhKgGrl/G+SeeuFvLMrgRn2ztXl3NcBNyvmZ1d3/fTAeicS6igydr/rb9Asg7zvYlhROLN2mkuYgAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T07:20:51.876478Z"},"content_sha256":"cbf9978ab024e2dcae285a9c58b9669a053445082005fcd18291f296340bd099","schema_version":"1.0","event_id":"sha256:cbf9978ab024e2dcae285a9c58b9669a053445082005fcd18291f296340bd099"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GND44DITQOXMLATJJALN6DARRA/bundle.json","state_url":"https://pith.science/pith/GND44DITQOXMLATJJALN6DARRA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GND44DITQOXMLATJJALN6DARRA/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":"2026-08-04T07:20:51Z","links":{"resolver":"https://pith.science/pith/GND44DITQOXMLATJJALN6DARRA","bundle":"https://pith.science/pith/GND44DITQOXMLATJJALN6DARRA/bundle.json","state":"https://pith.science/pith/GND44DITQOXMLATJJALN6DARRA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GND44DITQOXMLATJJALN6DARRA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:GND44DITQOXMLATJJALN6DARRA","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":"d75de91f6ba8257b31a9f0545e3fde0483ed05050952e6044cddbc34157d9d37","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-22T18:56:01Z","title_canon_sha256":"3ffed33f6c02afd47732a1997bdd8d96da6b997718ab89d5ada16bbcc59c99bf"},"schema_version":"1.0","source":{"id":"2001.08208","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.08208","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"arxiv_version","alias_value":"2001.08208v1","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.08208","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"pith_short_12","alias_value":"GND44DITQOXM","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"pith_short_16","alias_value":"GND44DITQOXMLATJ","created_at":"2026-07-05T00:38:12Z"},{"alias_kind":"pith_short_8","alias_value":"GND44DIT","created_at":"2026-07-05T00:38:12Z"}],"graph_snapshots":[{"event_id":"sha256:cbf9978ab024e2dcae285a9c58b9669a053445082005fcd18291f296340bd099","target":"graph","created_at":"2026-07-05T00:38:12Z","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/2001.08208/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a qualitative search for ultra-fast outflows (UFOs) in excess variance spectra of radio-quiet active galactic nuclei (AGN). We analyse 42 sources from the Tombesi et al. (2010) spectroscopic UFO detection sample, and an additional 22 different sources from the Kara et al. (2016) variability sample. A total of 58 sources have sufficient observational data from XMM-Newton EPIC-pn and variability for an excess variance spectrum to be calculated. We examine these spectra for peaks corresponding to variable blue-shifted H- and He-like ion absorption lines from UFOs. We find good evidence","authors_text":"A. M. Joyce, D. J. K. Buisson, F. F\\\"urst, G. A. Matzeu, L. Mallick, M. L. Parker, M. Santos-Lle\\'o, N. Alvarez Crespo, N. Schartel, W. Alston, Z. Igo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-22T18:56:01Z","title":"Searching for Ultra-fast Outflows in AGN using Variability Spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.08208","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:b8023491d868e2e4cf69331629fae2cad065e876bdf9c22b52762fcd45c6c69d","target":"record","created_at":"2026-07-05T00:38:12Z","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":"d75de91f6ba8257b31a9f0545e3fde0483ed05050952e6044cddbc34157d9d37","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-01-22T18:56:01Z","title_canon_sha256":"3ffed33f6c02afd47732a1997bdd8d96da6b997718ab89d5ada16bbcc59c99bf"},"schema_version":"1.0","source":{"id":"2001.08208","kind":"arxiv","version":1}},"canonical_sha256":"3347ce0d1383aec582694816df0c11881964f7c82830fc979a11503615b2c5e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3347ce0d1383aec582694816df0c11881964f7c82830fc979a11503615b2c5e7","first_computed_at":"2026-07-05T00:38:12.235916Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:38:12.235916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QXsIx+tiyx1k99zFm53qnsaCtiOz+cDt4PnXwKl+6+uXSSFrowjFsgH48CBOsrC7eW0F0icPC5jnVDmqBKXZAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:38:12.236337Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.08208","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8023491d868e2e4cf69331629fae2cad065e876bdf9c22b52762fcd45c6c69d","sha256:cbf9978ab024e2dcae285a9c58b9669a053445082005fcd18291f296340bd099"],"state_sha256":"69e3e6cfe8cad293d60b5ba66201ee3690f4d48ab124300e9a2910b30862e747"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+ggV2Rx68RfkfpyghHAF5f2jt74LBySpjrIgOOwl3/UEtkDAbmWsdD/g4U8ot59u6vGyRG/ygyphZZ+6ivSUAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T07:20:51.879784Z","bundle_sha256":"14c8cc952f001cef6ba216786db6eb71c993aa9be831a19156054ee41dd0e4ab"}}