{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:Z4GCGW3QX3R7ZS3JLJYPX23NQ5","short_pith_number":"pith:Z4GCGW3Q","canonical_record":{"source":{"id":"1902.02800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T19:00:11Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"7f7c54ce1c9acbb79f09f5fad2a9ba1c5b59252a3120de129aa1ea39248a6de8","abstract_canon_sha256":"26abff00c4434f4af0fba92fa65c091eadc7e5f74f6f140ed9401bb95616ab70"},"schema_version":"1.0"},"canonical_sha256":"cf0c235b70bee3fccb695a70fbeb6d8776922664b74e998fb2328296a2dc3803","source":{"kind":"arxiv","id":"1902.02800","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.02800","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"arxiv_version","alias_value":"1902.02800v1","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.02800","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"pith_short_12","alias_value":"Z4GCGW3QX3R7","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"Z4GCGW3QX3R7ZS3J","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"Z4GCGW3Q","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:Z4GCGW3QX3R7ZS3JLJYPX23NQ5","target":"record","payload":{"canonical_record":{"source":{"id":"1902.02800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T19:00:11Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"7f7c54ce1c9acbb79f09f5fad2a9ba1c5b59252a3120de129aa1ea39248a6de8","abstract_canon_sha256":"26abff00c4434f4af0fba92fa65c091eadc7e5f74f6f140ed9401bb95616ab70"},"schema_version":"1.0"},"canonical_sha256":"cf0c235b70bee3fccb695a70fbeb6d8776922664b74e998fb2328296a2dc3803","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:55.734442Z","signature_b64":"UfT11XyKOZhsZ3OUTqmT2lCbKnF04O7XeITewyDS2reJwKgwOSxaq765/k/ZCHFahCkYSQUkiAMGC9XbPb4vBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf0c235b70bee3fccb695a70fbeb6d8776922664b74e998fb2328296a2dc3803","last_reissued_at":"2026-05-17T23:50:55.733884Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:55.733884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.02800","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":"2026-05-17T23:50:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KuuX4iBK/2NJiDM24Pyyd7jF91Dy3TKCuJobYoxNEeEVkv/+wOHA5shfhLZX4lpbof2ER+bnm6cbyidYmmJnAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T20:32:39.267330Z"},"content_sha256":"79807a86ee7738f965363770c1cd5601e7197e73cb8a96a3ee7084a6e29c3f60","schema_version":"1.0","event_id":"sha256:79807a86ee7738f965363770c1cd5601e7197e73cb8a96a3ee7084a6e29c3f60"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:Z4GCGW3QX3R7ZS3JLJYPX23NQ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Does AGN Fraction Depend on Redshift or Luminosity? An Extinction-Free Test by 18-band Mid-infrared SED Fitting in the AKARI NEP Wide Field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Chia-Ying Chiang, Hideo Matsuhara, Nagisa Oi, Seong-jin Kim, Tetsuya Hashimoto, Tomotsugu Goto","submitted_at":"2019-02-07T19:00:11Z","abstract_excerpt":"Revealing what fraction of galaxies harbor AGN is central in understanding black hole accretion history of the Universe. However, optical and soft X-ray surveys miss the most highly obscured AGNs. Infrared (IR), instead, is more robust against absorption. Previous IR photometric surveys, however, only had 4 or 5 filters in mid-IR. Our AKARI North Ecliptic Pole (NEP) wide field sample has 18 filters in mid-IR (9 from AKARI, 4 from WISE, and 5 from Spitzer), for the first time, allowing a sophisticated mid-IR SED fitting diagnosis for a statistical number of sources (89178 over 5.4 deg$^2$). By "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.02800","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":"2026-05-17T23:50:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pjt6ED3yxVdwQxCc50po2t5q5c1wlmuB2Y4jpTvLCfOvjPRuMc4li8kxQkp9usdSaunkiVCbOluR0GxXrUaTAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T20:32:39.267690Z"},"content_sha256":"76b3601b6c984754da09f5699e1f7db3682a16a8abace000f20a8ab63b416f2b","schema_version":"1.0","event_id":"sha256:76b3601b6c984754da09f5699e1f7db3682a16a8abace000f20a8ab63b416f2b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z4GCGW3QX3R7ZS3JLJYPX23NQ5/bundle.json","state_url":"https://pith.science/pith/Z4GCGW3QX3R7ZS3JLJYPX23NQ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z4GCGW3QX3R7ZS3JLJYPX23NQ5/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":"2026-06-04T20:32:39Z","links":{"resolver":"https://pith.science/pith/Z4GCGW3QX3R7ZS3JLJYPX23NQ5","bundle":"https://pith.science/pith/Z4GCGW3QX3R7ZS3JLJYPX23NQ5/bundle.json","state":"https://pith.science/pith/Z4GCGW3QX3R7ZS3JLJYPX23NQ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z4GCGW3QX3R7ZS3JLJYPX23NQ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:Z4GCGW3QX3R7ZS3JLJYPX23NQ5","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":"26abff00c4434f4af0fba92fa65c091eadc7e5f74f6f140ed9401bb95616ab70","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T19:00:11Z","title_canon_sha256":"7f7c54ce1c9acbb79f09f5fad2a9ba1c5b59252a3120de129aa1ea39248a6de8"},"schema_version":"1.0","source":{"id":"1902.02800","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.02800","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"arxiv_version","alias_value":"1902.02800v1","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.02800","created_at":"2026-05-17T23:50:55Z"},{"alias_kind":"pith_short_12","alias_value":"Z4GCGW3QX3R7","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"Z4GCGW3QX3R7ZS3J","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"Z4GCGW3Q","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:76b3601b6c984754da09f5699e1f7db3682a16a8abace000f20a8ab63b416f2b","target":"graph","created_at":"2026-05-17T23:50:55Z","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":"Revealing what fraction of galaxies harbor AGN is central in understanding black hole accretion history of the Universe. However, optical and soft X-ray surveys miss the most highly obscured AGNs. Infrared (IR), instead, is more robust against absorption. Previous IR photometric surveys, however, only had 4 or 5 filters in mid-IR. Our AKARI North Ecliptic Pole (NEP) wide field sample has 18 filters in mid-IR (9 from AKARI, 4 from WISE, and 5 from Spitzer), for the first time, allowing a sophisticated mid-IR SED fitting diagnosis for a statistical number of sources (89178 over 5.4 deg$^2$). By ","authors_text":"Chia-Ying Chiang, Hideo Matsuhara, Nagisa Oi, Seong-jin Kim, Tetsuya Hashimoto, Tomotsugu Goto","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T19:00:11Z","title":"Does AGN Fraction Depend on Redshift or Luminosity? An Extinction-Free Test by 18-band Mid-infrared SED Fitting in the AKARI NEP Wide Field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.02800","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":"sha256:79807a86ee7738f965363770c1cd5601e7197e73cb8a96a3ee7084a6e29c3f60","target":"record","created_at":"2026-05-17T23:50:55Z","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":"26abff00c4434f4af0fba92fa65c091eadc7e5f74f6f140ed9401bb95616ab70","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T19:00:11Z","title_canon_sha256":"7f7c54ce1c9acbb79f09f5fad2a9ba1c5b59252a3120de129aa1ea39248a6de8"},"schema_version":"1.0","source":{"id":"1902.02800","kind":"arxiv","version":1}},"canonical_sha256":"cf0c235b70bee3fccb695a70fbeb6d8776922664b74e998fb2328296a2dc3803","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf0c235b70bee3fccb695a70fbeb6d8776922664b74e998fb2328296a2dc3803","first_computed_at":"2026-05-17T23:50:55.733884Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:55.733884Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UfT11XyKOZhsZ3OUTqmT2lCbKnF04O7XeITewyDS2reJwKgwOSxaq765/k/ZCHFahCkYSQUkiAMGC9XbPb4vBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:55.734442Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.02800","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:79807a86ee7738f965363770c1cd5601e7197e73cb8a96a3ee7084a6e29c3f60","sha256:76b3601b6c984754da09f5699e1f7db3682a16a8abace000f20a8ab63b416f2b"],"state_sha256":"35e24b780df8733c517e95f9640b046846f6c471a5d45bcd16b44f1da64cd269"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KjY/tR7qk56TXyuD4mugrh2RGXC6t27zqjj/03B0yLTtV2hsOoF55L4n/AQuRGQTzFtEaXk/TbuGYMFm5FOyAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T20:32:39.269730Z","bundle_sha256":"dd573f3f4597787d0d0eb0ee0c9b3999a9bcd73d2f234f4dcd20bf86c63abfed"}}