{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:2LHP26EPBKM2QEHSNOI4CEIXFV","short_pith_number":"pith:2LHP26EP","schema_version":"1.0","canonical_sha256":"d2cefd788f0a99a810f26b91c111172d671efa5be9e53d675151efa953aac7e3","source":{"kind":"arxiv","id":"1804.01464","version":1},"attestation_state":"computed","paper":{"title":"Discovery of two eclipsing X-ray binaries in M51","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Jifeng Liu, Roberto Soria, Ryan Urquhart, Song Wang","submitted_at":"2018-04-04T15:20:11Z","abstract_excerpt":"We discovered eclipses and dips in two luminous (and highly variable) X-ray sources in M\\,51. One (CXOM51 J132943.3$+$471135) is an ultraluminous supersoft source, with a thermal spectrum at a temperature of about 0.1 keV and characteristic blackbody radius of about $10^4$ km. The other (CXOM51 J132946.1$+$471042) has a two-component spectrum with additional thermal-plasma emission; it approached an X-ray luminosity of $10^{39}$erg s$^{-1}$ during outbursts in 2005 and 2012. From the timing of three eclipses in a series of {\\it Chandra} observations, we determine the binary period ($52.75 \\pm "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1804.01464","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-04-04T15:20:11Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"c5c7197fbbb7ccd7adeff55f63768b973dadbf4212ad5b3ec316370162e2aff2","abstract_canon_sha256":"413d0eb43ec37ec135427e5aa2e4c2f9e87d26f8ec56ba0b39b4eeb87b7ecd6b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:37.933782Z","signature_b64":"nkEVKtQsasp0tZGIbNVFfK9T8Di7/dgexgGxG6MepHRuQh/XMMf6aLvABiQJ3/TbDihnGT7c4GkXSUbxB6enDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2cefd788f0a99a810f26b91c111172d671efa5be9e53d675151efa953aac7e3","last_reissued_at":"2026-05-18T00:17:37.933056Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:37.933056Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Discovery of two eclipsing X-ray binaries in M51","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Jifeng Liu, Roberto Soria, Ryan Urquhart, Song Wang","submitted_at":"2018-04-04T15:20:11Z","abstract_excerpt":"We discovered eclipses and dips in two luminous (and highly variable) X-ray sources in M\\,51. One (CXOM51 J132943.3$+$471135) is an ultraluminous supersoft source, with a thermal spectrum at a temperature of about 0.1 keV and characteristic blackbody radius of about $10^4$ km. The other (CXOM51 J132946.1$+$471042) has a two-component spectrum with additional thermal-plasma emission; it approached an X-ray luminosity of $10^{39}$erg s$^{-1}$ during outbursts in 2005 and 2012. From the timing of three eclipses in a series of {\\it Chandra} observations, we determine the binary period ($52.75 \\pm "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.01464","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":"1804.01464","created_at":"2026-05-18T00:17:37.933191+00:00"},{"alias_kind":"arxiv_version","alias_value":"1804.01464v1","created_at":"2026-05-18T00:17:37.933191+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.01464","created_at":"2026-05-18T00:17:37.933191+00:00"},{"alias_kind":"pith_short_12","alias_value":"2LHP26EPBKM2","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_16","alias_value":"2LHP26EPBKM2QEHS","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_8","alias_value":"2LHP26EP","created_at":"2026-05-18T12:32:02.567920+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/2LHP26EPBKM2QEHSNOI4CEIXFV","json":"https://pith.science/pith/2LHP26EPBKM2QEHSNOI4CEIXFV.json","graph_json":"https://pith.science/api/pith-number/2LHP26EPBKM2QEHSNOI4CEIXFV/graph.json","events_json":"https://pith.science/api/pith-number/2LHP26EPBKM2QEHSNOI4CEIXFV/events.json","paper":"https://pith.science/paper/2LHP26EP"},"agent_actions":{"view_html":"https://pith.science/pith/2LHP26EPBKM2QEHSNOI4CEIXFV","download_json":"https://pith.science/pith/2LHP26EPBKM2QEHSNOI4CEIXFV.json","view_paper":"https://pith.science/paper/2LHP26EP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1804.01464&json=true","fetch_graph":"https://pith.science/api/pith-number/2LHP26EPBKM2QEHSNOI4CEIXFV/graph.json","fetch_events":"https://pith.science/api/pith-number/2LHP26EPBKM2QEHSNOI4CEIXFV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2LHP26EPBKM2QEHSNOI4CEIXFV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2LHP26EPBKM2QEHSNOI4CEIXFV/action/storage_attestation","attest_author":"https://pith.science/pith/2LHP26EPBKM2QEHSNOI4CEIXFV/action/author_attestation","sign_citation":"https://pith.science/pith/2LHP26EPBKM2QEHSNOI4CEIXFV/action/citation_signature","submit_replication":"https://pith.science/pith/2LHP26EPBKM2QEHSNOI4CEIXFV/action/replication_record"}},"created_at":"2026-05-18T00:17:37.933191+00:00","updated_at":"2026-05-18T00:17:37.933191+00:00"}