{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:EEQ6FYJGBG4SRIO2RUUTUOPXDP","short_pith_number":"pith:EEQ6FYJG","schema_version":"1.0","canonical_sha256":"2121e2e12609b928a1da8d293a39f71bf428d11f574066003b0e245918d98c68","source":{"kind":"arxiv","id":"0706.2652","version":1},"attestation_state":"computed","paper":{"title":"The Spectrum of the Black Hole X-ray Nova V404 Cygni in Quiescence as Measured by XMM-Newton","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.K.H. Kong, C.A. Haswell, C.K. Bradley, E. Gallo, J. Casares, R.I. Hynes","submitted_at":"2007-06-18T20:31:13Z","abstract_excerpt":"We present XMM observations of the black hole X-ray nova V404 Cygni in quiescence. Its quiescent spectrum can be best fitted by a simple power-law with slope 2. The spectra are consistent with that expected for the advection-dominated accretion flow (ADAF). V404 Cyg was roughly equal in luminosity compared to the previous observation of Chandra. We see variability of a factor of 4 during the observation. We find no evidence for the presence of fluorescent or H-like/He-like iron emission, with upper limits of 52 eV and 110 eV respectively. The limit on the fluorescent emission is improved by a "},"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":"0706.2652","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-18T20:31:13Z","cross_cats_sorted":[],"title_canon_sha256":"93566dfb56afc40c0f7b86f97f4e914b6908b791cbd2baf817d2194dbd0e83d0","abstract_canon_sha256":"8f178a2130f9557db06a85d1972dd5c489731f5626adb1d8212841f59fe37a8b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:33.892350Z","signature_b64":"o0Qotq7tOVGetc6msmy5lkZWKpSVwxxuDQ+qtReRLvxTIPJ6x/d+d9o1XI/O+0jFH4nbFLpT8DtD8Fgc/RZBBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2121e2e12609b928a1da8d293a39f71bf428d11f574066003b0e245918d98c68","last_reissued_at":"2026-05-18T04:29:33.891926Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:33.891926Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Spectrum of the Black Hole X-ray Nova V404 Cygni in Quiescence as Measured by XMM-Newton","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.K.H. Kong, C.A. Haswell, C.K. Bradley, E. Gallo, J. Casares, R.I. Hynes","submitted_at":"2007-06-18T20:31:13Z","abstract_excerpt":"We present XMM observations of the black hole X-ray nova V404 Cygni in quiescence. Its quiescent spectrum can be best fitted by a simple power-law with slope 2. The spectra are consistent with that expected for the advection-dominated accretion flow (ADAF). V404 Cyg was roughly equal in luminosity compared to the previous observation of Chandra. We see variability of a factor of 4 during the observation. We find no evidence for the presence of fluorescent or H-like/He-like iron emission, with upper limits of 52 eV and 110 eV respectively. The limit on the fluorescent emission is improved by a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.2652","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":"0706.2652","created_at":"2026-05-18T04:29:33.891987+00:00"},{"alias_kind":"arxiv_version","alias_value":"0706.2652v1","created_at":"2026-05-18T04:29:33.891987+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.2652","created_at":"2026-05-18T04:29:33.891987+00:00"},{"alias_kind":"pith_short_12","alias_value":"EEQ6FYJGBG4S","created_at":"2026-05-18T12:25:55.427421+00:00"},{"alias_kind":"pith_short_16","alias_value":"EEQ6FYJGBG4SRIO2","created_at":"2026-05-18T12:25:55.427421+00:00"},{"alias_kind":"pith_short_8","alias_value":"EEQ6FYJG","created_at":"2026-05-18T12:25:55.427421+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/EEQ6FYJGBG4SRIO2RUUTUOPXDP","json":"https://pith.science/pith/EEQ6FYJGBG4SRIO2RUUTUOPXDP.json","graph_json":"https://pith.science/api/pith-number/EEQ6FYJGBG4SRIO2RUUTUOPXDP/graph.json","events_json":"https://pith.science/api/pith-number/EEQ6FYJGBG4SRIO2RUUTUOPXDP/events.json","paper":"https://pith.science/paper/EEQ6FYJG"},"agent_actions":{"view_html":"https://pith.science/pith/EEQ6FYJGBG4SRIO2RUUTUOPXDP","download_json":"https://pith.science/pith/EEQ6FYJGBG4SRIO2RUUTUOPXDP.json","view_paper":"https://pith.science/paper/EEQ6FYJG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0706.2652&json=true","fetch_graph":"https://pith.science/api/pith-number/EEQ6FYJGBG4SRIO2RUUTUOPXDP/graph.json","fetch_events":"https://pith.science/api/pith-number/EEQ6FYJGBG4SRIO2RUUTUOPXDP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EEQ6FYJGBG4SRIO2RUUTUOPXDP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EEQ6FYJGBG4SRIO2RUUTUOPXDP/action/storage_attestation","attest_author":"https://pith.science/pith/EEQ6FYJGBG4SRIO2RUUTUOPXDP/action/author_attestation","sign_citation":"https://pith.science/pith/EEQ6FYJGBG4SRIO2RUUTUOPXDP/action/citation_signature","submit_replication":"https://pith.science/pith/EEQ6FYJGBG4SRIO2RUUTUOPXDP/action/replication_record"}},"created_at":"2026-05-18T04:29:33.891987+00:00","updated_at":"2026-05-18T04:29:33.891987+00:00"}