Cygnus X-1: shedding light on the spectral variability of a black hole

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dc.contributor.authorGrinberg, V.
dc.contributor.authorHell, N.
dc.contributor.authorWilms, J.
dc.contributor.authorRodriguez, J.
dc.contributor.authorPottschmidt, Katja
dc.contributor.authorNowak, M.A.
dc.contributor.authorBöck, M.
dc.contributor.authorBodaghee, A.
dc.contributor.authorBel, M. Cadolle
dc.contributor.authorFürst, F.
dc.contributor.authorHanke, M.
dc.contributor.authorKühnel, M.
dc.contributor.authorLaurent, P.
dc.contributor.authorMarkoff, S.B.
dc.contributor.authorMarkowitz, A.
dc.contributor.authorMarcu, D.M.
dc.contributor.authorPooley, G.G.
dc.contributor.authorPopp, A.
dc.contributor.authorRothschild, R.E.
dc.contributor.authorTomsick, J.A.
dc.date.accessioned2023-09-14T20:49:50Z
dc.date.available2023-09-14T20:49:50Z
dc.date.issued2013-07-18
dc.description9th INTEGRAL Workshop and celebration of the 10th anniversary of the launch, October 15-19, 2012 Bibliotheque Nationale de France, Paris, Franceen_US
dc.description.abstractThe knowledge of the spectral state of a black hole is essential for the interpretation of data from black holes in terms of their emission models. Based on pointed observations of Cyg X-1 with the Rossi X-ray timing Explorer (RXTE) that are used to classify simultaneous RXTE-ASM observations, we develop a scheme based on RXTE-ASM colors and count rates that can be used to classify all observations of this canonical black hole that were performed between 1996 and 2011. We show that a simple count rate criterion, as used previously, leads to a significantly higher fraction of misclassified observations. This scheme enables us to classify single INTEGRALIBIS science windows and to obtain summed spectra for the soft, intermediate and hard state with low contamination by other states.en_US
dc.description.sponsorshipThis work has been partially funded by the Bundesministerium für Wirtschaft und Technologie under Deutsches Zentrum für Luft- und Raumfahrt Grants 50 OR 1007 and 50 OR 1113 and by the European Commission through ITN 215212 “Black Hole Universe”, was partially completed by LLNL under Contract DE-AC52-07NA27344. K.P. and D.M.M. acknowledge support from NASA grant NNX09AT28G for INTEGRAL’s Cycle 7 Guest Observer Programme. The data analysis presented in this work was performed with ISIS 1.6.2 [5]. We thank John E. Davis for the development of the slxfig module used to prepare all figures in this work.en_US
dc.description.urihttps://pos.sissa.it/176/050/en_US
dc.format.extent6 pagesen_US
dc.genreconference papers and proceedingsen_US
dc.identifierdoi:10.13016/m2hciq-ge14
dc.identifier.citationGrinberg, Victoria. “Cygnus X-1: Shedding Light on the Spectral Variability of a Black Hole.” In Proceedings of An INTEGRAL View of the High-Energy Sky (the First 10 Years) - 9th INTEGRAL Workshop and Celebration of the 10th Anniversary of the Launch — PoS(INTEGRAL 2012), 176:050. SISSA Medialab, 2013. https://doi.org/10.22323/1.176.0050.en_US
dc.identifier.urihttps://doi.org/10.22323/1.176.0050
dc.identifier.urihttp://hdl.handle.net/11603/29675
dc.language.isoen_USen_US
dc.publisherProceedings of Scienceen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Physics Department
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Student Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.en_US
dc.rightsAttribution-NonCommercial-ShareAlike 1.0 Generic (CC BY-NC-SA 1.0)*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/1.0/*
dc.titleCygnus X-1: shedding light on the spectral variability of a black holeen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0002-4656-6881en_US

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