{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2000:IDX6C2JZOE4Q4TO7QLHOXNGXM2","short_pith_number":"pith:IDX6C2JZ","schema_version":"1.0","canonical_sha256":"40efe1693971390e4ddf82ceebb4d766ad47145b042b24e388be533f5dbbeee1","source":{"kind":"arxiv","id":"astro-ph/0012100","version":1},"attestation_state":"computed","paper":{"title":"X-ray variability in a complete sample of Soft X-ray selected AGN","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. Grupe, H.-C. Thomas, K. Beuermann","submitted_at":"2000-12-05T13:25:07Z","abstract_excerpt":"We present ROSAT All-Sky Survey and ROSAT pointed observations (PSPC and HRI) of a complete sample of 113 bright soft X-ray AGN selected from the ROSAT Bright Source Catalog. We compare these observations in order to search for extreme cases of flux and spectral X-ray variability - X-ray transient AGN. Three definite transients and one transient candidate are found.\n The other sources show amplitude variations typically by factors of 2-3 on timescales of years. We found that the variability strength on timescales of days is a function of the steepness of the X-ray spectrum: steeper X-ray objec"},"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":"astro-ph/0012100","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-12-05T13:25:07Z","cross_cats_sorted":[],"title_canon_sha256":"f5881517aaa3e2489fc419eb8ab5495c4fe045df6940b983a284f92f0db43f23","abstract_canon_sha256":"71834c27e86f03c6c97f1ac98b543379d5115c32ae1a7dc195b845eb4a650d01"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:46.199651Z","signature_b64":"f29/J7vazoKDUKH3mEbgdbx3vgfkMt8nelISt8TxXbXw3iiiL9De5LVeouNzYHYPaYTX/kbGgykJXbacz4UtAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"40efe1693971390e4ddf82ceebb4d766ad47145b042b24e388be533f5dbbeee1","last_reissued_at":"2026-05-18T01:07:46.199235Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:46.199235Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"X-ray variability in a complete sample of Soft X-ray selected AGN","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. Grupe, H.-C. Thomas, K. Beuermann","submitted_at":"2000-12-05T13:25:07Z","abstract_excerpt":"We present ROSAT All-Sky Survey and ROSAT pointed observations (PSPC and HRI) of a complete sample of 113 bright soft X-ray AGN selected from the ROSAT Bright Source Catalog. We compare these observations in order to search for extreme cases of flux and spectral X-ray variability - X-ray transient AGN. Three definite transients and one transient candidate are found.\n The other sources show amplitude variations typically by factors of 2-3 on timescales of years. We found that the variability strength on timescales of days is a function of the steepness of the X-ray spectrum: steeper X-ray objec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0012100","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0012100","created_at":"2026-05-18T01:07:46.199298+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0012100v1","created_at":"2026-05-18T01:07:46.199298+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0012100","created_at":"2026-05-18T01:07:46.199298+00:00"},{"alias_kind":"pith_short_12","alias_value":"IDX6C2JZOE4Q","created_at":"2026-05-18T12:25:49.631198+00:00"},{"alias_kind":"pith_short_16","alias_value":"IDX6C2JZOE4Q4TO7","created_at":"2026-05-18T12:25:49.631198+00:00"},{"alias_kind":"pith_short_8","alias_value":"IDX6C2JZ","created_at":"2026-05-18T12:25:49.631198+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/IDX6C2JZOE4Q4TO7QLHOXNGXM2","json":"https://pith.science/pith/IDX6C2JZOE4Q4TO7QLHOXNGXM2.json","graph_json":"https://pith.science/api/pith-number/IDX6C2JZOE4Q4TO7QLHOXNGXM2/graph.json","events_json":"https://pith.science/api/pith-number/IDX6C2JZOE4Q4TO7QLHOXNGXM2/events.json","paper":"https://pith.science/paper/IDX6C2JZ"},"agent_actions":{"view_html":"https://pith.science/pith/IDX6C2JZOE4Q4TO7QLHOXNGXM2","download_json":"https://pith.science/pith/IDX6C2JZOE4Q4TO7QLHOXNGXM2.json","view_paper":"https://pith.science/paper/IDX6C2JZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0012100&json=true","fetch_graph":"https://pith.science/api/pith-number/IDX6C2JZOE4Q4TO7QLHOXNGXM2/graph.json","fetch_events":"https://pith.science/api/pith-number/IDX6C2JZOE4Q4TO7QLHOXNGXM2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IDX6C2JZOE4Q4TO7QLHOXNGXM2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IDX6C2JZOE4Q4TO7QLHOXNGXM2/action/storage_attestation","attest_author":"https://pith.science/pith/IDX6C2JZOE4Q4TO7QLHOXNGXM2/action/author_attestation","sign_citation":"https://pith.science/pith/IDX6C2JZOE4Q4TO7QLHOXNGXM2/action/citation_signature","submit_replication":"https://pith.science/pith/IDX6C2JZOE4Q4TO7QLHOXNGXM2/action/replication_record"}},"created_at":"2026-05-18T01:07:46.199298+00:00","updated_at":"2026-05-18T01:07:46.199298+00:00"}