{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:5VXJMTYUZH4RWLAFYXAOGVPABQ","short_pith_number":"pith:5VXJMTYU","canonical_record":{"source":{"id":"astro-ph/0405604","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-29T21:19:45Z","cross_cats_sorted":[],"title_canon_sha256":"d3070aa847a345ee5ea7047c732c85a0f21f009b3a70f4bf868e1da654d81d07","abstract_canon_sha256":"1d11b4729471a3abd23ebf2aed509d820a8dd629233c5ee00cad5d0374b58817"},"schema_version":"1.0"},"canonical_sha256":"ed6e964f14c9f91b2c05c5c0e355e00c332b127aec3ec5ef8f14e4bf18860dde","source":{"kind":"arxiv","id":"astro-ph/0405604","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0405604","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0405604v1","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0405604","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"pith_short_12","alias_value":"5VXJMTYUZH4R","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"pith_short_16","alias_value":"5VXJMTYUZH4RWLAF","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"pith_short_8","alias_value":"5VXJMTYU","created_at":"2026-07-04T16:43:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:5VXJMTYUZH4RWLAFYXAOGVPABQ","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0405604","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-29T21:19:45Z","cross_cats_sorted":[],"title_canon_sha256":"d3070aa847a345ee5ea7047c732c85a0f21f009b3a70f4bf868e1da654d81d07","abstract_canon_sha256":"1d11b4729471a3abd23ebf2aed509d820a8dd629233c5ee00cad5d0374b58817"},"schema_version":"1.0"},"canonical_sha256":"ed6e964f14c9f91b2c05c5c0e355e00c332b127aec3ec5ef8f14e4bf18860dde","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:43:52.339226Z","signature_b64":"MTg8iDAozHRaDjYglqv3k2iPKxc99QEeND4+v9Uspax2VSOi0I/MkMklsrh7L122wPV2f85hvW9j3fI1fN2xBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ed6e964f14c9f91b2c05c5c0e355e00c332b127aec3ec5ef8f14e4bf18860dde","last_reissued_at":"2026-07-04T16:43:52.338824Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:43:52.338824Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0405604","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":"2026-07-04T16:43:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NNnP79atgzKIR5AP8a4PG1w/7V2fWTyKQ8NezNl7C1VMoy9eUwTBNJPGAJl5csSCfF49GNu5jJtdTRKmX/j7CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T03:32:45.896970Z"},"content_sha256":"1c1990fb17afb2e97e58d0a46830595fec091b96ead547aaa91fb025f501ae34","schema_version":"1.0","event_id":"sha256:1c1990fb17afb2e97e58d0a46830595fec091b96ead547aaa91fb025f501ae34"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:5VXJMTYUZH4RWLAFYXAOGVPABQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Obscured and unobscured active galactic nuclei in the Spitzer Space Telescope First Look Survey","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Sajina (2), B.T. Soifer (1), Caltech; (2) University of British Columbia; (3) Seoul National University), D. Fadda (1), D.L. Shupe (1), D.T. Frayer (1), F. Fang (1), F. Masci (1), F.R. Marleau (1), G. Helou (1), G. Wilson (1), H.I. Teplitz (1), I. Heinrichsen (1), J. Surace (1), L. Armus (1), L.J. Storrie-Lombardi (1), L. Yan (1) ((1) Spitzer Science Center, M. Im (3), M. Lacy (1), P.I. Choi (1), P.N. Appleton (1), S.C. Chapman (1)","submitted_at":"2004-05-29T21:19:45Z","abstract_excerpt":"Selection of active galactic nuclei (AGN) in the infrared allows the discovery of AGN whose optical emission is extinguished by dust. In this paper, we use the Spitzer Space Telescope First Look Survey (FLS) to assess what fraction of AGN with mid-infrared luminosities comparable to quasars are missed in optical quasar surveys due to dust obscuration. We begin by using the Sloan Digital Sky Survey (SDSS) database to identify 54 quasars within the 4 deg^2 extragalactic FLS. These quasars occupy a distinct region in mid-infrared color space by virtue of their strong, red, continua. This has allo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0405604","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/astro-ph/0405604/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":"2026-07-04T16:43:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+BW1DJJl9KYg47td3t/EX8TxTKkJ5MH1ZC6L+XKwkAhqFUe3mFfXOreG3VIkYMWI5+1GuLa84D3yABK9m6PFBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T03:32:45.897376Z"},"content_sha256":"7e9da218f449e27890fdc800231eca42450cf768dbdc0215340f427ef1658d7e","schema_version":"1.0","event_id":"sha256:7e9da218f449e27890fdc800231eca42450cf768dbdc0215340f427ef1658d7e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5VXJMTYUZH4RWLAFYXAOGVPABQ/bundle.json","state_url":"https://pith.science/pith/5VXJMTYUZH4RWLAFYXAOGVPABQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5VXJMTYUZH4RWLAFYXAOGVPABQ/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":"2026-07-13T03:32:45Z","links":{"resolver":"https://pith.science/pith/5VXJMTYUZH4RWLAFYXAOGVPABQ","bundle":"https://pith.science/pith/5VXJMTYUZH4RWLAFYXAOGVPABQ/bundle.json","state":"https://pith.science/pith/5VXJMTYUZH4RWLAFYXAOGVPABQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5VXJMTYUZH4RWLAFYXAOGVPABQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:5VXJMTYUZH4RWLAFYXAOGVPABQ","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":"1d11b4729471a3abd23ebf2aed509d820a8dd629233c5ee00cad5d0374b58817","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-29T21:19:45Z","title_canon_sha256":"d3070aa847a345ee5ea7047c732c85a0f21f009b3a70f4bf868e1da654d81d07"},"schema_version":"1.0","source":{"id":"astro-ph/0405604","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0405604","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0405604v1","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0405604","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"pith_short_12","alias_value":"5VXJMTYUZH4R","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"pith_short_16","alias_value":"5VXJMTYUZH4RWLAF","created_at":"2026-07-04T16:43:52Z"},{"alias_kind":"pith_short_8","alias_value":"5VXJMTYU","created_at":"2026-07-04T16:43:52Z"}],"graph_snapshots":[{"event_id":"sha256:7e9da218f449e27890fdc800231eca42450cf768dbdc0215340f427ef1658d7e","target":"graph","created_at":"2026-07-04T16:43:52Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0405604/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Selection of active galactic nuclei (AGN) in the infrared allows the discovery of AGN whose optical emission is extinguished by dust. In this paper, we use the Spitzer Space Telescope First Look Survey (FLS) to assess what fraction of AGN with mid-infrared luminosities comparable to quasars are missed in optical quasar surveys due to dust obscuration. We begin by using the Sloan Digital Sky Survey (SDSS) database to identify 54 quasars within the 4 deg^2 extragalactic FLS. These quasars occupy a distinct region in mid-infrared color space by virtue of their strong, red, continua. This has allo","authors_text":"A. Sajina (2), B.T. Soifer (1), Caltech; (2) University of British Columbia; (3) Seoul National University), D. Fadda (1), D.L. Shupe (1), D.T. Frayer (1), F. Fang (1), F. Masci (1), F.R. Marleau (1), G. Helou (1), G. Wilson (1), H.I. Teplitz (1), I. Heinrichsen (1), J. Surace (1), L. Armus (1), L.J. Storrie-Lombardi (1), L. Yan (1) ((1) Spitzer Science Center, M. Im (3), M. Lacy (1), P.I. Choi (1), P.N. Appleton (1), S.C. Chapman (1)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-05-29T21:19:45Z","title":"Obscured and unobscured active galactic nuclei in the Spitzer Space Telescope First Look Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0405604","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":"sha256:1c1990fb17afb2e97e58d0a46830595fec091b96ead547aaa91fb025f501ae34","target":"record","created_at":"2026-07-04T16:43:52Z","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":"1d11b4729471a3abd23ebf2aed509d820a8dd629233c5ee00cad5d0374b58817","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-05-29T21:19:45Z","title_canon_sha256":"d3070aa847a345ee5ea7047c732c85a0f21f009b3a70f4bf868e1da654d81d07"},"schema_version":"1.0","source":{"id":"astro-ph/0405604","kind":"arxiv","version":1}},"canonical_sha256":"ed6e964f14c9f91b2c05c5c0e355e00c332b127aec3ec5ef8f14e4bf18860dde","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ed6e964f14c9f91b2c05c5c0e355e00c332b127aec3ec5ef8f14e4bf18860dde","first_computed_at":"2026-07-04T16:43:52.338824Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:43:52.338824Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MTg8iDAozHRaDjYglqv3k2iPKxc99QEeND4+v9Uspax2VSOi0I/MkMklsrh7L122wPV2f85hvW9j3fI1fN2xBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:43:52.339226Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0405604","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c1990fb17afb2e97e58d0a46830595fec091b96ead547aaa91fb025f501ae34","sha256:7e9da218f449e27890fdc800231eca42450cf768dbdc0215340f427ef1658d7e"],"state_sha256":"1da6e5a5f96696439b42e95f40caa008afcbd469a881adcdeb07e096fce044f4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"da4np8UIRh5Oq2A6Cx0mIgLZmWYQJlXr1UQVlo6KBbPR+CP+qk4gAMQOjjbvunre4GXWiwLcWsk3uEsTY5+KCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-13T03:32:45.899863Z","bundle_sha256":"4c7767bf2aac95d15552e400a7b14d3f1423d0a6ed9b49bf546088bf7c97692a"}}