{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:ROGX6WXWTDXIOO5W3Z5GFBAPTP","short_pith_number":"pith:ROGX6WXW","schema_version":"1.0","canonical_sha256":"8b8d7f5af698ee873bb6de7a62840f9bce5374275c1761daf08e8c2dc7acb4bf","source":{"kind":"arxiv","id":"1304.1653","version":1},"attestation_state":"computed","paper":{"title":"X-ray emission from the luminous O-type subdwarf HD 49798 and its compact companion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A. Tiengo, G.L. Israel, L.Stella, N. La Palombara, N. Sartore, P. Esposito, S. Mereghetti","submitted_at":"2013-04-05T09:20:05Z","abstract_excerpt":"The X-ray source RX J0648.0-4418 is the only confirmed binary system in which a compact object, most likely a massive white dwarf, accretes from a hot subdwarf companion, the bright sdO star HD 49798. The X-ray emission from this system is characterized by two periodic modulations caused by an eclipse, at the orbital period of 1.55 d, and by the rotation of the compact object with a spin period of 13.2 s. In 2011 we obtained six short XMM-Newton observations centered at orbital phase 0.75, in order to study the system during the eclipse, and spaced at increasingly long time intervals in order "},"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":"1304.1653","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-04-05T09:20:05Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"305da09705946275b91a2c7f94dc142b34b9f2460df32bfcc098da84acadc7c4","abstract_canon_sha256":"7acbbf5e6e468dc6dfebcba6c7395114a6ab2e01be4218d7c69450f825ca8f74"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:42.590008Z","signature_b64":"hubj1sfGvq3SRe4ZI7Lu6fPra/CBXU78v/VSfuuZG59W6v8+r7R9gxrLowtGVrWxuVBSorom7Cr6zxjOn5uIDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b8d7f5af698ee873bb6de7a62840f9bce5374275c1761daf08e8c2dc7acb4bf","last_reissued_at":"2026-05-18T01:50:42.589389Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:42.589389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"X-ray emission from the luminous O-type subdwarf HD 49798 and its compact companion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A. Tiengo, G.L. Israel, L.Stella, N. La Palombara, N. Sartore, P. Esposito, S. Mereghetti","submitted_at":"2013-04-05T09:20:05Z","abstract_excerpt":"The X-ray source RX J0648.0-4418 is the only confirmed binary system in which a compact object, most likely a massive white dwarf, accretes from a hot subdwarf companion, the bright sdO star HD 49798. The X-ray emission from this system is characterized by two periodic modulations caused by an eclipse, at the orbital period of 1.55 d, and by the rotation of the compact object with a spin period of 13.2 s. In 2011 we obtained six short XMM-Newton observations centered at orbital phase 0.75, in order to study the system during the eclipse, and spaced at increasingly long time intervals in order "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.1653","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":"1304.1653","created_at":"2026-05-18T01:50:42.589482+00:00"},{"alias_kind":"arxiv_version","alias_value":"1304.1653v1","created_at":"2026-05-18T01:50:42.589482+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.1653","created_at":"2026-05-18T01:50:42.589482+00:00"},{"alias_kind":"pith_short_12","alias_value":"ROGX6WXWTDXI","created_at":"2026-05-18T12:27:59.945178+00:00"},{"alias_kind":"pith_short_16","alias_value":"ROGX6WXWTDXIOO5W","created_at":"2026-05-18T12:27:59.945178+00:00"},{"alias_kind":"pith_short_8","alias_value":"ROGX6WXW","created_at":"2026-05-18T12:27:59.945178+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/ROGX6WXWTDXIOO5W3Z5GFBAPTP","json":"https://pith.science/pith/ROGX6WXWTDXIOO5W3Z5GFBAPTP.json","graph_json":"https://pith.science/api/pith-number/ROGX6WXWTDXIOO5W3Z5GFBAPTP/graph.json","events_json":"https://pith.science/api/pith-number/ROGX6WXWTDXIOO5W3Z5GFBAPTP/events.json","paper":"https://pith.science/paper/ROGX6WXW"},"agent_actions":{"view_html":"https://pith.science/pith/ROGX6WXWTDXIOO5W3Z5GFBAPTP","download_json":"https://pith.science/pith/ROGX6WXWTDXIOO5W3Z5GFBAPTP.json","view_paper":"https://pith.science/paper/ROGX6WXW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1304.1653&json=true","fetch_graph":"https://pith.science/api/pith-number/ROGX6WXWTDXIOO5W3Z5GFBAPTP/graph.json","fetch_events":"https://pith.science/api/pith-number/ROGX6WXWTDXIOO5W3Z5GFBAPTP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ROGX6WXWTDXIOO5W3Z5GFBAPTP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ROGX6WXWTDXIOO5W3Z5GFBAPTP/action/storage_attestation","attest_author":"https://pith.science/pith/ROGX6WXWTDXIOO5W3Z5GFBAPTP/action/author_attestation","sign_citation":"https://pith.science/pith/ROGX6WXWTDXIOO5W3Z5GFBAPTP/action/citation_signature","submit_replication":"https://pith.science/pith/ROGX6WXWTDXIOO5W3Z5GFBAPTP/action/replication_record"}},"created_at":"2026-05-18T01:50:42.589482+00:00","updated_at":"2026-05-18T01:50:42.589482+00:00"}