Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Dan R. Wilkins"'
Autor:
Elias Kammoun, Anne M. Lohfink, Megan Masterson, Dan R. Wilkins, Xiurui Zhao, Mislav Balokovic, Peter G. Boorman, Riley Connors, Paolo Coppi, Andrew Fabian, Javier A. García, Kristin K. Madsen, Nicole Rodriguez Cavero, Navin Sridhar, Daniel Stern, John Tomsick, Thomas Wevers, Dominic J. Walton, Stefano Bianchi, Johannes Buchner, Francesca M. Civano, Giorgio Lanzuisi, Labani Mallick, Giorgio Matt, Andrea Merloni, Emanuele Nardini, Joanna M. Piotrowska, Claudio Ricci, Ka-Wah Wong, Abderahmen Zoghbi
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2024)
The hard X-ray emission in active galactic nuclei (AGN) and black hole X-ray binaries is thought to be produced by a hot cloud of electrons referred to as the corona. This emission, commonly described by a power law with a high-energy cutoff, is sugg
Externí odkaz:
https://doaj.org/article/89d4444f0ddb4266a2823787d2cadb21
Autor:
S. Komossa, Luigi C. Gallo, Dan R. Wilkins, Alpha A. Lee, George Cann, W. N. Alston, Erin Kara, D. J. K. Buisson, Anthony Bourached, Ryan-Rhys Griffiths, Dirk Grupe, Adam Ingram, Michael Parker, Andrew J. Young, Jiachen Jiang
The optical and UV variability of the majority of AGN may be related to the reprocessing of rapidly-changing X-ray emission from a more compact region near the central black hole. Such a reprocessing model would be characterised by lags between X-ray
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9443273e8885581418010b2f89b725e9
Autor:
Christopher S. Reynolds, Matthew J. Middleton, A. C. Fabian, Edward M. Cackett, Dan R. Wilkins, Erin Kara, G. Miniutti, Andrew J. Young, Dom Walton, Ciro Pinto, D. J. K. Buisson, Jiachen Jiang, B. De Marco, Michal Dovciak, Anne M. Lohfink, William Alston, Phil Uttley, Michael Parker, Luigi C. Gallo, Abderahmen Zogbhi
Publikováno v:
Alston, W N, Fabian, A C, Buisson, D J K, Kara, E, Parker, M L, Lohfink, A M, Uttley, P, Wilkins, D R, Pinto, C, De Marco, B, Cackett, E M, Middleton, M J, Walton, D J, Reynolds, C S, Jiang, J, Gallo, L C, Zogbhi, A, Miniutti, G, Dovciak, M & Young, A J 2019, ' The remarkable X-ray variability of IRAS 13224-3809-I. The variability process ', Monthly Notices of the Royal Astronomical Society, vol. 482, no. 2, pp. 2088-2106 . https://doi.org/10.1093/mnras/sty2527
NASA Astrophysics Data System
ResearcherID
Monthly Notices of the Royal Astronomical Society, 482(2), 2088-2106. Oxford University Press
NASA Astrophysics Data System
ResearcherID
Monthly Notices of the Royal Astronomical Society, 482(2), 2088-2106. Oxford University Press
We present a detailed X-ray timing analysis of the highly variable NLS1 galaxy, IRAS 13224-3809. The source was recently monitored for 1.5 Ms with XMM-Newton which, combined with 500 ks archival data, makes this the best studied NLS1 galaxy in X-rays
Autor:
Labani Mallick, Michael Parker, Anne M. Lohfink, B. De Marco, C. S. Stalin, Dan R. Wilkins, William Alston, Alex Markowitz
Publikováno v:
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Universitat Politècnica de Catalunya (UPC)
The scaling relations between the black hole (BH) mass and soft lag properties for both active galactic nuclei (AGNs) and BH X-ray binaries (BHXRBs) suggest the same underlying physical mechanism at work in accreting BH systems spanning a broad range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64b4a66cb98e2a2674984c043b694015
https://hdl.handle.net/2117/360207
https://hdl.handle.net/2117/360207
The innermost regions of accretion disks around black holes are strongly irradiated by X-rays that are emitted from a highly variable, compact corona, in the immediate vicinity of the black hole. The X-rays that are seen reflected from the disk and t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::697d34922d495e50a96a24e8a0fb3647
Autor:
Dan R. Wilkins, Mark W. Bautz, Sven Herrmann, Paul Nulsen, Stanislav Fort, Eric D. Miller, Catherine E. Grant, Tanmoy Chattopadhyay, Steven W. Allen, Ralph P. Kraft, R. G. Morris
Space-based X-ray detectors are subject to significant fluxes of charged particles in orbit, notably energetic cosmic ray protons, contributing a significant background. We develop novel machine learning algorithms to detect charged particle events i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f508fd985d9579b3f9395806be20cc64
http://arxiv.org/abs/2012.01463
http://arxiv.org/abs/2012.01463
Autor:
Erin Kara, Michael Parker, Luigi C. Gallo, Stefanie Komossa, A. L. Longinotti, D. Blue, Dan R. Wilkins, Dirk Grupe, P. Poulos, Gerard A. Kriss
The narrow-line Seyfert 1 galaxy Mrk 335 was one of the X-ray brightest AGN, but it has systematically faded since 2007. Here, we report the discovery with Swift of a sequence of bright and rapid X-ray flare events that reveal the emergence of Mrk 33
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afe8d1d1a327f8c6ca28519df4b7ae30
http://arxiv.org/abs/2011.04996
http://arxiv.org/abs/2011.04996
Autor:
Eric D. Miller, Mark W. Bautz, Esra Bulbul, Vittorio Ghirardini, Dan R. Wilkins, David Hall, Michael Freyberg, Joern Wilms, Arne Rau, Valentina Fioretti, Paul Nulsen, David N. Burrows, Fabio Gasteldello, Catherine E. Grant, Ralph P. Kraft, Steven W. Allen, Norbert Meidinger, Tanja Eraerds, Silvano Molendi
The particle-induced background of X-ray observatories is produced by Galactic Cosmic Ray (GCR) primary protons, electrons, and He ions. Events due to direct interaction with the detector are usually removed by on board processing. The interactions o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04e39734268f5bcd81ba83eb5123166d
http://oro.open.ac.uk/69780/7/69780.pdf
http://oro.open.ac.uk/69780/7/69780.pdf
Autor:
Dan R. Wilkins, Andrew C. Fabian, A G Gonzalez, P. Kosec, Marco Berton, Luigi C. Gallo, William Alston
We present results of temporal and spectral analyses on four XMM-Newton EPIC pn observations of IRAS 17020+4544, a narrow-line Seyfert 1 galaxy with evidence of a radio jet. Analysis of the light curves reveals that this radio-loud source does not be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40713bfbdfade20e98a764b298d26281
We study reflected X-ray emission that returns to the accretion disc in the strong gravitational fields around black holes using General Relativistic ray tracing and radiative transfer calculations. Reflected X-rays that are produced when the inner r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd8045eb7b7db0814755fcfa60664971