{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1999:KVB3MW7D7TJEJPDJFJKAEBMA3L","short_pith_number":"pith:KVB3MW7D","schema_version":"1.0","canonical_sha256":"5543b65be3fcd244bc692a54020580dad82d1ad6a9290430c828cea7aab40b98","source":{"kind":"arxiv","id":"astro-ph/9907150","version":1},"attestation_state":"computed","paper":{"title":"The Steep Spectrum Quasar PG1404+226 with ASCA, HST and ROSAT","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andrea Comastri (Osservatorio Astronomico di Bologna), Marie-Helene Ulrich (ESO Garching), Phil Crane (Dartmouth College), Stefanie Komossa (MPE Garching)","submitted_at":"1999-07-12T16:00:05Z","abstract_excerpt":"(abridged) We present and discuss our observations of the NL quasar PG1404+226 with ASCA and HST, and a re-analysis of our earlier observations with ROSAT. The soft X-ray spectrum is very steep and displays an absorption feature (edge or line at ~1.1 keV). We have applied a variety of models to the ASCA and ROSAT spectra without finding a completely satisfactory fit, and the identification of the edge remains uncertain. A satisfactory fit of the ASCA spectrum assuming that the edge is produced by highly ionized iron (using the code absori in XSPEC) is obtained with an overabundance of iron by "},"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/9907150","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-07-12T16:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"bad5f698a6d87ce5260086cde1dc7eb404e78040a4647ae3c0c8edabadbf5a52","abstract_canon_sha256":"433db7b0ad2846b4db1dae1b24c4e7fd652f97b50f73d7a18644f7804f678291"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:36.296275Z","signature_b64":"UasSW9n4g7h0hBmoX18fAJplXc8u30c3azWni13TRu+wtzZ0OwBTl+4I4FcLQuiMM+V/1K71fAM32Oeyf2yRCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5543b65be3fcd244bc692a54020580dad82d1ad6a9290430c828cea7aab40b98","last_reissued_at":"2026-05-18T01:07:36.295804Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:36.295804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Steep Spectrum Quasar PG1404+226 with ASCA, HST and ROSAT","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andrea Comastri (Osservatorio Astronomico di Bologna), Marie-Helene Ulrich (ESO Garching), Phil Crane (Dartmouth College), Stefanie Komossa (MPE Garching)","submitted_at":"1999-07-12T16:00:05Z","abstract_excerpt":"(abridged) We present and discuss our observations of the NL quasar PG1404+226 with ASCA and HST, and a re-analysis of our earlier observations with ROSAT. The soft X-ray spectrum is very steep and displays an absorption feature (edge or line at ~1.1 keV). We have applied a variety of models to the ASCA and ROSAT spectra without finding a completely satisfactory fit, and the identification of the edge remains uncertain. A satisfactory fit of the ASCA spectrum assuming that the edge is produced by highly ionized iron (using the code absori in XSPEC) is obtained with an overabundance of iron by "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9907150","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/9907150","created_at":"2026-05-18T01:07:36.295879+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9907150v1","created_at":"2026-05-18T01:07:36.295879+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9907150","created_at":"2026-05-18T01:07:36.295879+00:00"},{"alias_kind":"pith_short_12","alias_value":"KVB3MW7D7TJE","created_at":"2026-05-18T12:25:49.631198+00:00"},{"alias_kind":"pith_short_16","alias_value":"KVB3MW7D7TJEJPDJ","created_at":"2026-05-18T12:25:49.631198+00:00"},{"alias_kind":"pith_short_8","alias_value":"KVB3MW7D","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/KVB3MW7D7TJEJPDJFJKAEBMA3L","json":"https://pith.science/pith/KVB3MW7D7TJEJPDJFJKAEBMA3L.json","graph_json":"https://pith.science/api/pith-number/KVB3MW7D7TJEJPDJFJKAEBMA3L/graph.json","events_json":"https://pith.science/api/pith-number/KVB3MW7D7TJEJPDJFJKAEBMA3L/events.json","paper":"https://pith.science/paper/KVB3MW7D"},"agent_actions":{"view_html":"https://pith.science/pith/KVB3MW7D7TJEJPDJFJKAEBMA3L","download_json":"https://pith.science/pith/KVB3MW7D7TJEJPDJFJKAEBMA3L.json","view_paper":"https://pith.science/paper/KVB3MW7D","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/9907150&json=true","fetch_graph":"https://pith.science/api/pith-number/KVB3MW7D7TJEJPDJFJKAEBMA3L/graph.json","fetch_events":"https://pith.science/api/pith-number/KVB3MW7D7TJEJPDJFJKAEBMA3L/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KVB3MW7D7TJEJPDJFJKAEBMA3L/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KVB3MW7D7TJEJPDJFJKAEBMA3L/action/storage_attestation","attest_author":"https://pith.science/pith/KVB3MW7D7TJEJPDJFJKAEBMA3L/action/author_attestation","sign_citation":"https://pith.science/pith/KVB3MW7D7TJEJPDJFJKAEBMA3L/action/citation_signature","submit_replication":"https://pith.science/pith/KVB3MW7D7TJEJPDJFJKAEBMA3L/action/replication_record"}},"created_at":"2026-05-18T01:07:36.295879+00:00","updated_at":"2026-05-18T01:07:36.295879+00:00"}