Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Articles Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Correlated variability of the reflection fraction with the X-ray flux and spectral index for Mrk 478 Subject The topic of the resource accretion, accretion discs; black hole physics; galaxies: active; galaxies: Seyfert; X-rays: individual: Mrk 478 Description An account of the resource The X-ray spectrum of Mrk 478 is known to be dominated by a strong soft excess that can be described using relativistic blurred reflection. Using observations from XMM-Newton, AstroSat, and Swift, we show that for the long-term (?years) and intermediate-term (days to months) variability, the reflection fraction is anticorrelated with the flux and spectral index, which implies that the variability is due to the hard X-ray producing corona moving closer to and further from the black hole. Using flux-resolved spectroscopy of the XMM-Newton data, we show that the reflection fraction has the same behaviour with flux and index on short time-scales of hours. The results indicate that both the long- and short-term variability of the source is determined by the same physical mechanism of strong gravitational light bending causing enhanced reflection and low flux as the corona moves closer to the black hole. 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. Creator An entity primarily responsible for making the resource Barua S.; Jithesh V.; Misra R.; Medhi B.J.; Adegoke O. Source A related resource from which the described resource is derived Monthly Notices of the Royal Astronomical Society, Vol-517, No. 1, pp. 801-807. Publisher An entity responsible for making the resource available Oxford University Press Date A point or period of time associated with an event in the lifecycle of the resource 2022-01-01 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1093/mnras/stac2690" target="_blank" rel="noreferrer noopener">https://doi.org/10.1093/mnras/stac2690</a> <br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159212665&amp;doi=10.1093%2Fmnras%2Fstac2690&amp;partnerID=40&amp;md5=696fbcf076d22e4f455a18615f8a580b" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85159212665&amp;doi=10.1093%2fmnras%2fstac2690&amp;partnerID=40&amp;md5=696fbcf076d22e4f455a18615f8a580b</a> Rights Information about rights held in and over the resource All Open Access; Green Open Access Relation A related resource ISSN: 358711; CODEN: MNRAA Format The file format, physical medium, or dimensions of the resource Online Language A language of the resource English Type The nature or genre of the resource Article Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Barua S., Department of Physics, Gauhati University, Assam, Jalukbari, Guwahati, 781014, India; Jithesh V., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Main Road, Bengaluru, 560029, India; Misra R., Inter-University Centre for Astronomy and Astrophysics (IUCAA), PB No. 4, Ganeshkhind, Pune, 411007, India; Medhi B.J., Department of Physics, Gauhati University, Assam, Jalukbari, Guwahati, 781014, India; Adegoke O., Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, 91125, CA, United States