{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:CDIBG6ZXDDEC33WQWLC2NZW62P","short_pith_number":"pith:CDIBG6ZX","schema_version":"1.0","canonical_sha256":"10d0137b3718c82deed0b2c5a6e6ded3ff064149db8661c276abcb22cca9348e","source":{"kind":"arxiv","id":"0902.0933","version":1},"attestation_state":"computed","paper":{"title":"Spectroscopic follow-up of variability-selected active galactic nuclei in the Chandra Deep Field South","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"B. Leibundgut, D. Trevese, F. Vagnetti, K. Boutsia","submitted_at":"2009-02-05T16:14:46Z","abstract_excerpt":"Luminous AGNs are usually selected by their non-stellar colours or their X-ray emission. Colour selection cannot be used to select low-luminosity AGNs, since their emission is dominated by the host galaxy. Objects with low X-ray to optical ratio escape even the deepest X-ray surveys performed so far. In a previous study we presented a sample of candidates selected through optical variability in the Chandra Deep Field South, where repeated optical observations were performed for the STRESS supernova survey. We obtained new optical spectroscopy for a sample of variability selected candidates wit"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0902.0933","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-02-05T16:14:46Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"5855ea0c3a7cd35b518c07f240447476082c97e60a342ac9f3936b5237fe60a4","abstract_canon_sha256":"faf793bed14f5d83eae835aa3a7c7756458e060eef9fe89c069278d26c1b8355"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:14:21.503987Z","signature_b64":"7/wawgiYrL/Dek6Zrj0lAOSJsx8mVsu71yKG0BVsuenO8nJ7IXHkd3RXlwLD8JwVqa766JyJAi4CNP66txO9BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"10d0137b3718c82deed0b2c5a6e6ded3ff064149db8661c276abcb22cca9348e","last_reissued_at":"2026-07-04T17:14:21.503591Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:14:21.503591Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spectroscopic follow-up of variability-selected active galactic nuclei in the Chandra Deep Field South","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"B. Leibundgut, D. Trevese, F. Vagnetti, K. Boutsia","submitted_at":"2009-02-05T16:14:46Z","abstract_excerpt":"Luminous AGNs are usually selected by their non-stellar colours or their X-ray emission. Colour selection cannot be used to select low-luminosity AGNs, since their emission is dominated by the host galaxy. Objects with low X-ray to optical ratio escape even the deepest X-ray surveys performed so far. In a previous study we presented a sample of candidates selected through optical variability in the Chandra Deep Field South, where repeated optical observations were performed for the STRESS supernova survey. We obtained new optical spectroscopy for a sample of variability selected candidates wit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.0933","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/0902.0933/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0902.0933","created_at":"2026-07-04T17:14:21.503648+00:00"},{"alias_kind":"arxiv_version","alias_value":"0902.0933v1","created_at":"2026-07-04T17:14:21.503648+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0902.0933","created_at":"2026-07-04T17:14:21.503648+00:00"},{"alias_kind":"pith_short_12","alias_value":"CDIBG6ZXDDEC","created_at":"2026-07-04T17:14:21.503648+00:00"},{"alias_kind":"pith_short_16","alias_value":"CDIBG6ZXDDEC33WQ","created_at":"2026-07-04T17:14:21.503648+00:00"},{"alias_kind":"pith_short_8","alias_value":"CDIBG6ZX","created_at":"2026-07-04T17:14:21.503648+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P","json":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P.json","graph_json":"https://pith.science/api/pith-number/CDIBG6ZXDDEC33WQWLC2NZW62P/graph.json","events_json":"https://pith.science/api/pith-number/CDIBG6ZXDDEC33WQWLC2NZW62P/events.json","paper":"https://pith.science/paper/CDIBG6ZX"},"agent_actions":{"view_html":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P","download_json":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P.json","view_paper":"https://pith.science/paper/CDIBG6ZX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0902.0933&json=true","fetch_graph":"https://pith.science/api/pith-number/CDIBG6ZXDDEC33WQWLC2NZW62P/graph.json","fetch_events":"https://pith.science/api/pith-number/CDIBG6ZXDDEC33WQWLC2NZW62P/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P/action/storage_attestation","attest_author":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P/action/author_attestation","sign_citation":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P/action/citation_signature","submit_replication":"https://pith.science/pith/CDIBG6ZXDDEC33WQWLC2NZW62P/action/replication_record"}},"created_at":"2026-07-04T17:14:21.503648+00:00","updated_at":"2026-07-04T17:14:21.503648+00:00"}