{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:QI53ZEB5PFOUOXKYPDGGDJGS46","short_pith_number":"pith:QI53ZEB5","canonical_record":{"source":{"id":"1001.2520","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-14T18:09:52Z","cross_cats_sorted":[],"title_canon_sha256":"a1405c1d4c41f2c8da933106f0b777152f601382bc6c9567e0133dbbe0341a12","abstract_canon_sha256":"43a370a98c5d9e9fb3eaeaed35ba0bb2389df9fee4aff0d26e0fb17169a508a7"},"schema_version":"1.0"},"canonical_sha256":"823bbc903d795d475d5878cc61a4d2e7a98befe349aa93dc86ba3302f78ac9ac","source":{"kind":"arxiv","id":"1001.2520","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.2520","created_at":"2026-05-18T02:09:51Z"},{"alias_kind":"arxiv_version","alias_value":"1001.2520v1","created_at":"2026-05-18T02:09:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.2520","created_at":"2026-05-18T02:09:51Z"},{"alias_kind":"pith_short_12","alias_value":"QI53ZEB5PFOU","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"QI53ZEB5PFOUOXKY","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"QI53ZEB5","created_at":"2026-05-18T12:26:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:QI53ZEB5PFOUOXKYPDGGDJGS46","target":"record","payload":{"canonical_record":{"source":{"id":"1001.2520","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-14T18:09:52Z","cross_cats_sorted":[],"title_canon_sha256":"a1405c1d4c41f2c8da933106f0b777152f601382bc6c9567e0133dbbe0341a12","abstract_canon_sha256":"43a370a98c5d9e9fb3eaeaed35ba0bb2389df9fee4aff0d26e0fb17169a508a7"},"schema_version":"1.0"},"canonical_sha256":"823bbc903d795d475d5878cc61a4d2e7a98befe349aa93dc86ba3302f78ac9ac","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:51.933930Z","signature_b64":"nGA7ptV+Rg++xhC4Wlj37DiJo6oHw9aJNg6uKwoHnhE+xvzu4ZHeGrXCAwN1a8TcLcGka2vncmVcE5ZgLJT9BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"823bbc903d795d475d5878cc61a4d2e7a98befe349aa93dc86ba3302f78ac9ac","last_reissued_at":"2026-05-18T02:09:51.933109Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:51.933109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1001.2520","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":"2026-05-18T02:09:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7pdFWPQIz6boRULaCNGk6/Pd2l+2qa8ObnwOOANYAHUZHAIV/YJCh0ErRdiZYF9YYDWGJzn8a/5dYm/BHehOCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T02:22:37.399680Z"},"content_sha256":"a8ee602d2a9a1357c23b90acd96d7e5a9fef02e3b5d34e33b5391e2eafc09bb7","schema_version":"1.0","event_id":"sha256:a8ee602d2a9a1357c23b90acd96d7e5a9fef02e3b5d34e33b5391e2eafc09bb7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:QI53ZEB5PFOUOXKYPDGGDJGS46","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Beware of fake AGNs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"G. Stasinska, N. Vale Asari, R. Cid Fernandes (for the SEAGal collaboration)","submitted_at":"2010-01-14T18:09:52Z","abstract_excerpt":"In the BPT diagram, the distribution of the emission-line galaxies from the Sloan Digital Sky Survey (SDSS) evokes the wings of a seagull. Traditionally, galaxies in the right wing are considered to host AGNs. Our study of the stellar populations of SDSS galaxies showed that about1/4 of galaxies thought to host LINERS are in fact \"retired galaxies\", i.e. galaxies that stopped forming stars and are ionized by hot post-AGB stars and white dwarfs (Stasinska et al. 2008). When including the galaxies that lack some of the lines needed to place them in the BPT diagram the fraction of retired galaxie"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.2520","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":"2026-05-18T02:09:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UTo0aQ2f6QmtoteWiT1ehfc60UiXpkGE5uN8tXo10XsbrNfSmcRqkx3Ve3gOj9saACNfXSzqweQFWRl1dFX2AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T02:22:37.400361Z"},"content_sha256":"1f5efd47731acbb96e9ed2ec31b2739210bff6f74d826dbf71210e2196246bc3","schema_version":"1.0","event_id":"sha256:1f5efd47731acbb96e9ed2ec31b2739210bff6f74d826dbf71210e2196246bc3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QI53ZEB5PFOUOXKYPDGGDJGS46/bundle.json","state_url":"https://pith.science/pith/QI53ZEB5PFOUOXKYPDGGDJGS46/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QI53ZEB5PFOUOXKYPDGGDJGS46/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":"2026-05-30T02:22:37Z","links":{"resolver":"https://pith.science/pith/QI53ZEB5PFOUOXKYPDGGDJGS46","bundle":"https://pith.science/pith/QI53ZEB5PFOUOXKYPDGGDJGS46/bundle.json","state":"https://pith.science/pith/QI53ZEB5PFOUOXKYPDGGDJGS46/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QI53ZEB5PFOUOXKYPDGGDJGS46/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:QI53ZEB5PFOUOXKYPDGGDJGS46","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":"43a370a98c5d9e9fb3eaeaed35ba0bb2389df9fee4aff0d26e0fb17169a508a7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-14T18:09:52Z","title_canon_sha256":"a1405c1d4c41f2c8da933106f0b777152f601382bc6c9567e0133dbbe0341a12"},"schema_version":"1.0","source":{"id":"1001.2520","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.2520","created_at":"2026-05-18T02:09:51Z"},{"alias_kind":"arxiv_version","alias_value":"1001.2520v1","created_at":"2026-05-18T02:09:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.2520","created_at":"2026-05-18T02:09:51Z"},{"alias_kind":"pith_short_12","alias_value":"QI53ZEB5PFOU","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"QI53ZEB5PFOUOXKY","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"QI53ZEB5","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:1f5efd47731acbb96e9ed2ec31b2739210bff6f74d826dbf71210e2196246bc3","target":"graph","created_at":"2026-05-18T02:09:51Z","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 the BPT diagram, the distribution of the emission-line galaxies from the Sloan Digital Sky Survey (SDSS) evokes the wings of a seagull. Traditionally, galaxies in the right wing are considered to host AGNs. Our study of the stellar populations of SDSS galaxies showed that about1/4 of galaxies thought to host LINERS are in fact \"retired galaxies\", i.e. galaxies that stopped forming stars and are ionized by hot post-AGB stars and white dwarfs (Stasinska et al. 2008). When including the galaxies that lack some of the lines needed to place them in the BPT diagram the fraction of retired galaxie","authors_text":"G. Stasinska, N. Vale Asari, R. Cid Fernandes (for the SEAGal collaboration)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-14T18:09:52Z","title":"Beware of fake AGNs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.2520","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:a8ee602d2a9a1357c23b90acd96d7e5a9fef02e3b5d34e33b5391e2eafc09bb7","target":"record","created_at":"2026-05-18T02:09:51Z","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":"43a370a98c5d9e9fb3eaeaed35ba0bb2389df9fee4aff0d26e0fb17169a508a7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-14T18:09:52Z","title_canon_sha256":"a1405c1d4c41f2c8da933106f0b777152f601382bc6c9567e0133dbbe0341a12"},"schema_version":"1.0","source":{"id":"1001.2520","kind":"arxiv","version":1}},"canonical_sha256":"823bbc903d795d475d5878cc61a4d2e7a98befe349aa93dc86ba3302f78ac9ac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"823bbc903d795d475d5878cc61a4d2e7a98befe349aa93dc86ba3302f78ac9ac","first_computed_at":"2026-05-18T02:09:51.933109Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:51.933109Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nGA7ptV+Rg++xhC4Wlj37DiJo6oHw9aJNg6uKwoHnhE+xvzu4ZHeGrXCAwN1a8TcLcGka2vncmVcE5ZgLJT9BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:51.933930Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.2520","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a8ee602d2a9a1357c23b90acd96d7e5a9fef02e3b5d34e33b5391e2eafc09bb7","sha256:1f5efd47731acbb96e9ed2ec31b2739210bff6f74d826dbf71210e2196246bc3"],"state_sha256":"7785c5551c2fe632e55209f94a26a8d495a5d0fe6f084c905ec985b1cec4d212"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6FPKRPRzP18XeMHMvegc3hvid/4lFlYp3zTnIe+HbyGhEI3hLrO2QrS8iD/TvgbrWfiuS+5DS+aIAMQEZB4gBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T02:22:37.403697Z","bundle_sha256":"a0cbe9575bdc99f905407ffafa3f67f6dd1a20bd8f2cdff6c8d70eebb8c8cb4a"}}