{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:HHAG5TP7BUFCA6AIKSCLFOZSL5","short_pith_number":"pith:HHAG5TP7","canonical_record":{"source":{"id":"1612.04815","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-14T21:00:00Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"6a7435e80adc3be89807eccc8252280f7cb8a2b3a3654ad2d6fa6554b3e6b323","abstract_canon_sha256":"a3b44977bd16b1e2532acf8d17ddf90b9e5798ceaf22d69934da72f837754d81"},"schema_version":"1.0"},"canonical_sha256":"39c06ecdff0d0a2078085484b2bb325f7e086c67468737d8780fac6a5791f105","source":{"kind":"arxiv","id":"1612.04815","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.04815","created_at":"2026-05-18T00:52:13Z"},{"alias_kind":"arxiv_version","alias_value":"1612.04815v1","created_at":"2026-05-18T00:52:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.04815","created_at":"2026-05-18T00:52:13Z"},{"alias_kind":"pith_short_12","alias_value":"HHAG5TP7BUFC","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HHAG5TP7BUFCA6AI","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HHAG5TP7","created_at":"2026-05-18T12:30:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:HHAG5TP7BUFCA6AIKSCLFOZSL5","target":"record","payload":{"canonical_record":{"source":{"id":"1612.04815","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-14T21:00:00Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"6a7435e80adc3be89807eccc8252280f7cb8a2b3a3654ad2d6fa6554b3e6b323","abstract_canon_sha256":"a3b44977bd16b1e2532acf8d17ddf90b9e5798ceaf22d69934da72f837754d81"},"schema_version":"1.0"},"canonical_sha256":"39c06ecdff0d0a2078085484b2bb325f7e086c67468737d8780fac6a5791f105","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:13.145747Z","signature_b64":"CS4fCsrORM8cSifAih9xgBWEkZdBZ5FAe8cuGkQOP2X543UBqLkHKiqaKArxbOuQduWQZHxgi79NJCIU72ezCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39c06ecdff0d0a2078085484b2bb325f7e086c67468737d8780fac6a5791f105","last_reissued_at":"2026-05-18T00:52:13.145106Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:13.145106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.04815","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":"2026-05-18T00:52:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dI00gza8TielaJQBkfyZwpZE8FJLLVIPeApGJrXjZf0+dT+PACy8GRqhNeXxcKv0lOkmXgQXyCKLEvFbby6dAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T21:33:13.830731Z"},"content_sha256":"2c4bc6715d940464d188009c34edea32b3ded1a721a7dba2188c7ad89a568abe","schema_version":"1.0","event_id":"sha256:2c4bc6715d940464d188009c34edea32b3ded1a721a7dba2188c7ad89a568abe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:HHAG5TP7BUFCA6AIKSCLFOZSL5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Active Galactic Nuclei from HeII: a more complete census of AGN in SDSS galaxies yields a new population of low-luminosity AGN in highly star-forming galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Anna K. Weigel, Kevin Schawinski, Kyuseok Oh, Lia F. Sartori, Michael Koss, Rudolf B\\\"ar","submitted_at":"2016-12-14T21:00:00Z","abstract_excerpt":"In order to perform a more complete census of active galactic nuclei (AGN) in the local Universe, we investigate the use of the HeII~$\\lambda 4685$ emission line diagnostic diagram by Shirazi & Brinchmann (2012) in addition to the standard methods based on other optical emission lines. The He II based diagnostics is more sensitive to AGN ionization in the presence of strong star formation than conventional line diagnostics. We survey a magnitude-limited sample of 63,915 galaxies from the Sloan Digital Sky Survey Data Release 7 at $0.02<z<0.05$ and use both the conventional BPT emission line di"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.04815","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":"2026-05-18T00:52:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a0XB75JunvWoErXD9+IkjfBpUsWB0APljT3QuHGd6S3QV/k5f7TGaPquxz088llyejO8U+M8kKF9i86haxsLCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T21:33:13.831150Z"},"content_sha256":"87c5feb445fcb25a358e87a7a59b1bfc6b5a34ee4cb83f934ae99742a4703f41","schema_version":"1.0","event_id":"sha256:87c5feb445fcb25a358e87a7a59b1bfc6b5a34ee4cb83f934ae99742a4703f41"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HHAG5TP7BUFCA6AIKSCLFOZSL5/bundle.json","state_url":"https://pith.science/pith/HHAG5TP7BUFCA6AIKSCLFOZSL5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HHAG5TP7BUFCA6AIKSCLFOZSL5/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":"2026-06-27T21:33:13Z","links":{"resolver":"https://pith.science/pith/HHAG5TP7BUFCA6AIKSCLFOZSL5","bundle":"https://pith.science/pith/HHAG5TP7BUFCA6AIKSCLFOZSL5/bundle.json","state":"https://pith.science/pith/HHAG5TP7BUFCA6AIKSCLFOZSL5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HHAG5TP7BUFCA6AIKSCLFOZSL5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:HHAG5TP7BUFCA6AIKSCLFOZSL5","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":"a3b44977bd16b1e2532acf8d17ddf90b9e5798ceaf22d69934da72f837754d81","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-14T21:00:00Z","title_canon_sha256":"6a7435e80adc3be89807eccc8252280f7cb8a2b3a3654ad2d6fa6554b3e6b323"},"schema_version":"1.0","source":{"id":"1612.04815","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.04815","created_at":"2026-05-18T00:52:13Z"},{"alias_kind":"arxiv_version","alias_value":"1612.04815v1","created_at":"2026-05-18T00:52:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.04815","created_at":"2026-05-18T00:52:13Z"},{"alias_kind":"pith_short_12","alias_value":"HHAG5TP7BUFC","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"HHAG5TP7BUFCA6AI","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"HHAG5TP7","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:87c5feb445fcb25a358e87a7a59b1bfc6b5a34ee4cb83f934ae99742a4703f41","target":"graph","created_at":"2026-05-18T00:52:13Z","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":"In order to perform a more complete census of active galactic nuclei (AGN) in the local Universe, we investigate the use of the HeII~$\\lambda 4685$ emission line diagnostic diagram by Shirazi & Brinchmann (2012) in addition to the standard methods based on other optical emission lines. The He II based diagnostics is more sensitive to AGN ionization in the presence of strong star formation than conventional line diagnostics. We survey a magnitude-limited sample of 63,915 galaxies from the Sloan Digital Sky Survey Data Release 7 at $0.02<z<0.05$ and use both the conventional BPT emission line di","authors_text":"Anna K. Weigel, Kevin Schawinski, Kyuseok Oh, Lia F. Sartori, Michael Koss, Rudolf B\\\"ar","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-14T21:00:00Z","title":"Active Galactic Nuclei from HeII: a more complete census of AGN in SDSS galaxies yields a new population of low-luminosity AGN in highly star-forming galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.04815","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":"sha256:2c4bc6715d940464d188009c34edea32b3ded1a721a7dba2188c7ad89a568abe","target":"record","created_at":"2026-05-18T00:52:13Z","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":"a3b44977bd16b1e2532acf8d17ddf90b9e5798ceaf22d69934da72f837754d81","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-12-14T21:00:00Z","title_canon_sha256":"6a7435e80adc3be89807eccc8252280f7cb8a2b3a3654ad2d6fa6554b3e6b323"},"schema_version":"1.0","source":{"id":"1612.04815","kind":"arxiv","version":1}},"canonical_sha256":"39c06ecdff0d0a2078085484b2bb325f7e086c67468737d8780fac6a5791f105","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39c06ecdff0d0a2078085484b2bb325f7e086c67468737d8780fac6a5791f105","first_computed_at":"2026-05-18T00:52:13.145106Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:52:13.145106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CS4fCsrORM8cSifAih9xgBWEkZdBZ5FAe8cuGkQOP2X543UBqLkHKiqaKArxbOuQduWQZHxgi79NJCIU72ezCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:52:13.145747Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.04815","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c4bc6715d940464d188009c34edea32b3ded1a721a7dba2188c7ad89a568abe","sha256:87c5feb445fcb25a358e87a7a59b1bfc6b5a34ee4cb83f934ae99742a4703f41"],"state_sha256":"0f8554523dfc72786936e8b4a5f0a4b9c926a00e3176085031c501fef4022e17"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rhSic8Cw8Ol6+W0vfc94sUAnmTRxekAPAZguYnz/lrWiG7iRknwcQuoHLovAX+IfLA1kOJpu18ewOFVnP/ovAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T21:33:13.833029Z","bundle_sha256":"f27cde17c70699e17e66234a83313391c37ea4c43749facb84f7cc090cc6d6e6"}}