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 A stochastic propagation model to the energy dependent rapid temporal behaviour of Cygnus X-1 as observed by AstroSat in the hard state Subject The topic of the resource accretion, accretion discs; black hole physics -X-rays: binaries; X-rays: individual: Cygnus X-1. Description An account of the resource We report the results from analysis of six observations of Cygnus X-1 by Large Area X-ray Proportional Counter (LAXPC) and Soft X-ray Telescope (SXT) onboard AstroSat, when the source was in the hard spectral state as revealed by the broad-band spectra. The spectra obtained from all the observations can be described by a single-temperature Comptonizing region with disc and reflection components. The event mode data from LAXPC provides unprecedented energy dependent fractional root mean square (rms) and time-lag at different frequencies which we fit with empirical functions.We invoke a fluctuation propagation model for a simple geometry of a truncated disc with a hot inner region. Unlike other propagation models, the hard X-ray emission (&gt;4 keV) is assumed to be from the hot inner disc by a single-temperature thermal Comptonization process. The fluctuations first cause a variation in the temperature of the truncated disc and then the temperature of the inner disc after a frequency dependent time delay.We find that the model can explain the energy dependent rms and time-lag at different frequencies. 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. Creator An entity primarily responsible for making the resource Maqbool B.; Mudambi S.P.; Misra R.; Yadav J.S.; Gudennavar S.B.; Bubbly S.G.; Rao A.; Jogadand S.; Patil M.K.; Bhattacharyya S.; Singh K.P. Source A related resource from which the described resource is derived Monthly Notices of the Royal Astronomical Society, Vol-486, No. 2, pp. 2964-2975. 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 2019-01-01 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1093/mnras/stz930" target="_blank" rel="noreferrer noopener">https://doi.org/10.1093/mnras/stz930</a> <br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-85068007710&amp;doi=10.1093%2Fmnras%2Fstz930&amp;partnerID=40&amp;md5=0c653dc51b826d5e57a0fb410d2aaa12" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-85068007710&amp;doi=10.1093%2fmnras%2fstz930&amp;partnerID=40&amp;md5=0c653dc51b826d5e57a0fb410d2aaa12</a> Rights Information about rights held in and over the resource All Open Access; Bronze 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 Maqbool B., Inter-University Centre for Astronomy and Astrophysics, Ganeshkind, Pune, 411007, India; Mudambi S.P., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Road, Bengaluru, 560029, India; Misra R., Inter-University Centre for Astronomy and Astrophysics, Ganeshkind, Pune, 411007, India; Yadav J.S., Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400005, India; Gudennavar S.B., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Road, Bengaluru, 560029, India; Bubbly S.G., Department of Physics and Electronics, CHRIST (Deemed to Be University), Hosur Road, Bengaluru, 560029, India; Rao A., Department of Physics and Astronomy, Faculty of Physical Sciences and Engineering, University of Southampton, Southampton, SO17 1BJ, United Kingdom; Jogadand S., Swami Ramanand Teerth Marathwada University, Nanded, 431 606, India; Patil M.K., Swami Ramanand Teerth Marathwada University, Nanded, 431 606, India; Bhattacharyya S., Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400005, India; Singh K.P., Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81 SAS Nagar, Manauli, 140306, India