{"paper":{"title":"Alternative explanations for extreme supersolar iron abundances inferred from the energy spectrum of Cygnus X-1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Andrew Fabian (Cambridge), CNRS), Didier Barret (Univ. de Toulouse, Dominic J. Walton (Cambridge), Felix Furst (ESAC), Javier A. Garcia (Caltech, Jeng-Lun Chiu (National Tsing Hua Univ.), John A. Tomsick (SSL/UCB), Jon M. Miller (Univ. of Michigan), Katja Pottschmidt (NASA/GSFC, Kazutaka Yamaoka (Nagoya Univ.), Maica Clavel (SSL/UCB, Michael L. Parker (ESAC), Poshak Gandhi (Univ. of Southampton), Univ. Erlangen-Nurnberg), Univ. Grenoble Alpes), Univ. of Maryland), Victoria Grinberg (ESTEC)","submitted_at":"2018-01-22T19:00:09Z","abstract_excerpt":"Here we study a 1-200 keV energy spectrum of the black hole binary Cygnus X-1 taken with NuSTAR and Suzaku. This is the first report of a NuSTAR observation of Cyg X-1 in the intermediate state, and the observation was taken during the part of the binary orbit where absorption due to the companion's stellar wind is minimal. The spectrum includes a multi-temperature thermal disk component, a cutoff power-law component, and relativistic and non-relativistic reflection components. Our initial fits with publicly available constant density reflection models (relxill and reflionx) lead to extremely "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07267","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"}