CP
Christos Panagiotou
astro-ph.HEastro-ph.GAastro-ph.SR
On Valency
published · living versionsW_y9kgpdcz·v1 · currentpublished
Resolving a Clumpy Disk Wind in 4U 1957+115 with XRISM
with Paul A. Draghis, Erin Kara, Ehud Behar, Jon M. Miller +5
1 version
Preprints & journals
56 papers in the corpus · 2016–2026Extreme AGN Variability in WISE: Powerful Flares and Candidate Tidal Disruption Events in AGN2609.01421v1 · Satya Teja Anuraag Upadhyayula, Daniel Stern, Kishalay De et al.2026 · 0 citationsarXiv
X-ray disc reverberation modelling of the X-ray/UV/optical spectral/timing properties of Fairall 92607.23267v1 · M. Polioudakis, M. Papoutsis, I. E. Papadakis et al.2026 · 0 citationsarXiv
A Suppressed Volumetric Rate of High-Luminosity Mid-Infrared Selected Tidal Disruption Events2606.31926v2 · Prajna Nair, Christos Panagiotou, Megan Masterson et al.2026 · 0 citationsarXiv
Observation of A Solar Like Magnetic Reconnection Event in an AGN Corona with XRISM2606.25636v2 · Gal Vardi, Ehud Behar, Liyi Gu et al.2026 · 1 citationAstrophys. J. Lett. 1007 (2026) L23
Discovery of Quasar Variability and Early Accretion Disk Signatures at Cosmic Dawn2605.00978v1 · Gene C. K. Leung, Anna-Christina Eilers, Christos Panagiotou et al.2026 · 1 citationarXiv
Delving into the depths of NGC 3783 with XRISM: V. Broad-band modeling of ionized outflows2604.21710v1 · Keqin Zhao, Jelle S. Kaastra, Liyi Gu et al.2026 · 1 citationA&A 710, A192 (2026)
Persistence of the Millihertz X-ray Quasi-Periodic Oscillation in the Active Galactic Nucleus 1ES 1927+6542604.16688v1 · Megan Masterson, Erin Kara, William N. Alston et al.2026 · 0 citationsarXiv
Even a precessing clock is right twice per orbit -- The super-periods of eRO-QPE2 and challenges for quasi-periodic eruption orbital models2604.09788v1 · R. Arcodia, G. Miniutti, J. Chakraborty et al.2026 · 0 citationsarXiv
Variability of the X-ray obscuring wind in Mrk 335 with XMM-Newton/RGS2602.23255v2 · Daniele Rogantini, Erin Kara, Luigi Gallo et al.2026 · 0 citationsarXiv
X-ray Spectral-Timing Properties of Tidal Disruption Events2602.16868v1 · Joheen Chakraborty, Megan Masterson, Andrew Mummery et al.2026 · 3 citationsarXiv
Testing the Association of Supermassive Black Hole Infrared Flares and High-energy Neutrinos2601.22309v1 · Megan Wang, Christos Panagiotou, Kishalay De et al.2026 · 0 citationsarXiv
Fading into darkness: A weak mass ejection and low-efficiency fallback accompanying black hole formation in M31-2014-DS12601.05774v2 · Kishalay De, Morgan MacLeod, Jacob E. Jencson et al.2026 · 1 citationarXiv
Delving into the depths of NGC 3783 with XRISM IV. Mapping of the accretion flow with Fe K emission lines2512.09207v1 · Chen Li, Jelle S. Kaastra, Liyi Gu et al.2025 · 10 citationsarXiv
Delving into the depths of NGC 3783 with XRISM III. Birth of an ultrafast outflow during a soft flare2512.08448v1 · Liyi Gu, Keigo Fukumura, Jelle Kaastra et al.2025 · 11 citationsA&A, 704, A146 (2025)
The X-ray/UV Connection in NGC 5548: A Rapidly Varying Corona2512.05739v1 · M. Papoutsis, I. E. Papadakis, C. Panagiotou et al.2025 · 2 citationsarXiv
The Accretion Disk Size Problem in AGN Disk Reverberation Mapping is an Obscuration Effect: A Uniform AGN Sample Study with Swift2509.25315v1 · Collin Lewin, Erin Kara, Christos Panagiotou et al.2025 · 3 citationsarXiv
X-ray reverberation modelling of the observed UV/optical power spectra of quasars2509.03159v1 · M. Papoutsis, I. E. Papadakis, C. Panagiotou et al.2025 · 4 citationsarXiv
Radio Emission from the Infrared Tidal Disruption Event WTP14adeqka: The First Directly Resolved Delayed Outflow from a TDE2508.16756v1 · Walter W. Golay, Edo Berger, Yvette Cendes et al.2025 · 0 citationsarXiv
Delving into the depths of NGC 3783 with XRISM. I. Kinematic and ionization structure of the highly ionized outflows2506.09395v2 · Missagh Mehdipour, Jelle S. Kaastra, Megan E. Eckart et al.2025 · 26 citationsA&A 699, A228 (2025)
Discovery of Quasi-periodic Eruptions in the Tidal Disruption Event and Extreme Coronal Line Emitter AT2022upj: implications for the QPE/TDE fraction and a connection to ECLEs2503.19013v2 · Joheen Chakraborty, Erin Kara, Riccardo Arcodia et al.2025 · 38 citationsarXiv
Frequency-resolved time lags due to X-ray disk reprocessing in AGN2503.09036v1 · Christos Panagiotou, Iossif Papadakis, Erin Kara et al.2025 · 6 citationsarXiv
JWST's First View of Tidal Disruption Events: Compact, Accretion-Driven Emission Lines & Strong Silicate Emission in an Infrared-selected Sample2503.08647v2 · Megan Masterson, Kishalay De, Christos Panagiotou et al.2025 · 0 citationsarXiv
Millihertz oscillations near the innermost orbit of a supermassive black hole.39910305 · Masterson, Megan, Kara, Erin, Panagiotou, Christos et al.2025 · 32 citationsNature. 2025;638(8050):370-375
X-ray reverberation modelling of the continuum, optical/UV time-lags in quasars2411.09681v1 · D. A. Langis, I. E. Papadakis, E. Kammoun et al.2024 · 6 citationsarXiv
Disappearance of a massive star in the Andromeda Galaxy due to formation of a black hole2410.14778v2 · Kishalay De, Morgan MacLeod, Jacob E. Jencson et al.2024 · 9 citationsarXiv
X-ray reverberation as an explanation for UV/optical variability in nearby Seyferts2409.10417v1 · M. Papoutsis, I. E. Papadakis, C. Panagiotou et al.2024 · 10 citationsarXiv
AGN STORM 2. VII. A Frequency-resolved Map of the Accretion Disk in Mrk 817: Simultaneous X-ray Reverberation and UVOIR Disk Reprocessing Time Lags2409.09115v1 · Collin Lewin, Erin Kara, Aaron J. Barth et al.2024 · 20 citationsApJ 974 271 (2024)
Correlated mid-infrared and X-ray outbursts in black hole X-ray binaries: A new route to discovery in infrared surveys2406.17866v1 · Chris John, Kishalay De, Matteo Lucchini et al.2024 · 6 citationsarXiv
AGN STORM 2: IX. Studying the Dynamics of the Ionized Obscurer in Mrk 817 with High-resolution X-ray Spectroscopy2406.17061v1 · Fatima Zaidouni, Erin Kara, Peter Kosec et al.2024 · 11 citationsarXiv
WTP19aalnxx: Discovery of a bright mid-infrared transient in the emerging class of low luminosity supernovae revealed by delayed circumstellar interaction2405.14663v1 · Charlotte Myers, Kishalay De, Lin Yan et al.2024 · 9 citationsarXiv
Stacking X-ray Observations of "Little Red Dots": Implications for their AGN Properties2404.13290v3 · Minghao Yue, Anna-Christina Eilers, Tonima Tasnim Ananna et al.2024 · 4 citationsarXiv
Broadband X-ray/UV/optical time-resolved spectroscopy of NGC 5548: The origin of the UV/optical variability in active galactic nuclei2403.12208v1 · E. Kammoun, I. E. Papadakis, M. Dovciak et al.2024 · 16 citationsarXiv
X-ray polarization measurement of the gold standard of radio-quiet active galactic nuclei : NGC 10682403.02061v2 · F. Marin, A. Marinucci, M. Laurenti et al.2024 · 19 citationsA&A 689, A238 (2024)
A New Population of Mid-Infrared-Selected Tidal Disruption Events: Implications for Tidal Disruption Event Rates and Host Galaxy Properties2401.01403v1 · Megan Masterson, Kishalay De, Christos Panagiotou et al.2024 · 83 citationsarXiv
Variability as a predictor for the hard-to-soft state transition in GX 339-42310.07462v1 · Matteo Lucchini, Marina Ten Have, Jingyi Wang et al.2023 · 10 citationsarXiv
AGN STORM 2. VI. Mapping Temperature Fluctuations in the Accretion Disk of Mrk 8172310.01497v1 · Jack M. M. Neustadt, Christopher S. Kochanek, John Montano et al.2023 · 17 citationsarXiv
Revisiting UV/optical continuum time lags in AGN2309.05392v2 · E. S. Kammoun, L. Robin, I. E. Papadakis et al.2023 · 33 citationsarXiv
X-ray/UVOIR Frequency-resolved Time Lag Analysis of Mrk 335 Reveals Accretion Disk Reprocessing2307.11145v1 · Collin Lewin, Erin Kara, Edward M. Cackett et al.2023 · 19 citationsApJ 954 33 (2023)
AGN STORM 2. IV. Swift X-ray and ultraviolet/optical monitoring of Mrk 8172306.17663v2 · Edward M. Cackett, Jonathan Gelbord, Aaron J. Barth et al.2023 · 33 citationsarXiv
Investigating the impact of vertically extended coronae on X-ray reverberation mapping2305.05039v1 · Matteo Lucchini, Guglielmo Mastroserio, Jingyi Wang et al.2023 · 21 citationsarXiv
Uncovering the geometry of the hot X-ray corona in the Seyfert galaxy NGC4151 with IXPE2303.12541v2 · V. E. Gianolli, D. E. Kim, S. Bianchi et al.2023 · 84 citationsarXiv
Rapidly evolving Galactic plane outbursts in NEOWISE: Revisiting the Galactic nova rate with the first all-sky search in the mid-infrared2303.08795v3 · Liam Zuckerman, Kishalay De, Anna-Christina Eilers et al.2023 · 12 citationsarXiv
A luminous dust-obscured Tidal Disruption Event candidate in a star forming galaxy at 42 Mpc2303.02710v1 · Christos Panagiotou, Kishalay De, Megan Masterson et al.2023 · 23 citationsarXiv
AGN STORM 2: II. Ultraviolet Observations of Mrk817 with the Cosmic Origins Spectrograph on the Hubble Space Telescope2302.11587v1 · Y. Homayouni, Gisella De Rosa, Rachel Plesha et al.2023 · 17 citationsarXiv
UV/Optical disk reverberation lags despite a faint X-ray corona in the AGN Mrk 3352302.07342v1 · Erin Kara, Aaron J. Barth, Edward M. Cackett et al.2023 · 41 citationsarXiv
Explaining the moderate UV/X-ray correlation in AGN2211.06963v1 · Christos Panagiotou, Erin Kara, Michal Dovciak2022 · 32 citationsarXiv
Polarization constraints on the X-ray corona in Seyfert Galaxies: MCG-05-23-162207.09338v1 · A. Marinucci, F. Muleri, M. Dovciak et al.2022 · 54 citationsarXiv
A physical model for the UV/optical power spectra of AGN2207.04917v1 · Christos Panagiotou, Iossif Papadakis, Erin Kara et al.2022 · 30 citationsarXiv
SRGA J181414.6-225604: A new Galactic symbiotic X-ray binary outburst triggered by an intense mass loss episode of a heavily obscured Mira variable2205.09139v1 · Kishalay De, Ilya Mereminskiy, Roberto Soria et al.2022 · 18 citationsarXiv
NuSTAR view of heavily absorbed AGN: The correlation2107.10917v1 · Christos Panagiotou, Roland Walter, Stephane Paltani2021 · 3 citationsA&A 653, A162 (2021)
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