{"paper":{"title":"Identification of the soft X-ray excess in Cygnus X-1 with disc emission","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"G. Hasinger, M. Balucinska-Church, M. J. Church, T. Belloni","submitted_at":"1995-09-05T11:32:21Z","abstract_excerpt":"We present results of a study of the soft X-ray excess in the black hole candidate Cygnus X-1 made with the {\\it Rosat PSPC}, using observations taken during persistent emission at orbital phases close to 0.5. The soft excess can be well fitted as a blackbody with temperature $\\rm {kT_{bb}}$ = $\\rm {0.13\\pm 0.02}$ keV. $\\rm {kT_{bb}}$ did not vary appreciably with intensity of the source. By assuming that the distance of the source is its lower limit of 2.5 kpc, a luminosity of the soft excess of $\\rm {4.7\\cdot 10^{36}}$ erg $\\rm {s^{-1}}$ was obtained. From this, disc temperatures were calcul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9509020","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9509020/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}