High-Frequency Power Spectrum of AGN NGC 4051 Revealed by NICER

Authors: Rani, B., Kim, Jungeun, Papadakis, I., Gendreau, K. C., Masterson, M., Hamaguchi, K., Kara, E., Lee, S. -S., Mushotzky, R.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2501.13049

X-ray reverberation modelling of the continuum, optical/UV time-lags in quasars

Authors: Langis, D. A., Papadakis, I. E., Kammoun, E., Panagiotou, C., Dovčiak, M.

Subject Terms: Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2411.09681

X-ray reverberation as an explanation for UV/optical variability in nearby Seyferts

Authors: Papoutsis, M., Papadakis, I. E., Panagiotou, C., Dovčiak, M., Kammoun, E.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2409.10417

Multi-epoch UV $-$ X-ray spectral study of NGC 4151 with AstroSat

Authors: Kumar, Shrabani, Dewangan, G. C., Gandhi, P., Papadakis, I. E., Mithun, N. P. S., Singh, K. P., Bhattacharya, D., Zdziarski, A. A., Stewart, G. C., Bhattacharyya, S., Chandra, S.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2409.04762

Broadband X-ray/UV/optical time-resolved spectroscopy of NGC 5548: The origin of the UV/optical variability in active galactic nuclei

Authors: Kammoun, E., Papadakis, I. E., Dovčiak, M., Panagiotou, C.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2403.12208

The X-ray variability of AGN: power-spectrum and variance analysis of the Swift/BAT light curves

Authors: Papadakis, I. E., Binas-Valavanis, V.

Source: A&A 685, A50 (2024)

Subject Terms: Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2402.15373

Comparing indirect methods for black hole masses in AGN: the good, the bad, and the ugly

Authors: Gliozzi, M., Williams, J. K., Akylas, A., Papadakis, I. E., Shuvo, O. I., Halavatkar, A., Alt, A.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2312.14098

Detection of X-ray/UV delay in NGC 4051 using AstroSat observations

Authors: Kumari, Kavita, Dewangan, G. C., Papadakis, I. E., Singh, K. P.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2311.02722

Revisiting UV/optical continuum time lags in AGN

Authors: Kammoun, E. S., Robin, L., Papadakis, I. E., Dovčiak, M., Panagiotou, C.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2309.05392

The RoboPol sample of optical polarimetric standards

Authors: Blinov, D., Maharana, S., Bouzelou, F., Casadio, C., Gjerløw, E., Jormanainen, J., Kiehlmann, S., Kypriotakis, J. A., Liodakis, I., Mandarakas, N., Markopoulioti, L., Panopoulou, G. V., Pelgrims, V., Pouliasi, A., Romanopoulos, S., Skalidis, R., Anche, R. M., Angelakis, E., Antoniadis, J., Medhi, B. J., Hovatta, T., Kus, A., Kylafis, N., Mahabal, A., Myserlis, I., Paleologou, E., Papadakis, I., Pavlidou, V., Papamastorakis, I., Pearson, T. J., Potter, S. B., Ramaprakash, A. N., Readhead, A. C. S., Reig, P., Słowikowska, A., Tassis, K., Zensus, J. A.

Source: A&A 677, A144 (2023)

Subject Terms: Astrophysics - Instrumentation and Methods for Astrophysics

Access URL: http://arxiv.org/abs/2307.06151

Far-Ultraviolet Spectroscopy Of Active Galactic Nuclei With AstroSat/UVIT

Authors: Kumar, Shrabani, Dewangan, G. C., Singh, K. P., Gandhi, P., Papadakis, I. E., Tripathi, P., Mallick, L.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2303.11882

Contrasting X-ray/UV time-lags in Seyfert 1 galaxies NGC 4593 and NGC 7469 using AstroSat observations

Authors: Kumari, Kavita, Dewangan, G. C., Papadakis, I. E., Beard, Max W. J., McHardy, I. M., Singh, K. P., Bhattacharya, D., Bhattacharyya, S., Chandra, S.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2303.01556

The universal shape of the X-ray variability power spectrum of AGN up to $z\sim 3$

Authors: Paolillo, M., Papadakis, I. E., Brandt, W. N., Bauer, F. E., Lanzuisi, G., Allevato, V., Shemmer, O., Zheng, X. C., De Cicco, D., Gilli, R., Luo, B., Thomas, M., Tozzi, P., Vito, F., Xue, Y. Q.

Source: A&A 673, A68 (2023)

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2302.08524

A theoretical study of the time-lags due to Comptonization and the constraints on the X-ray corona in AGN

Authors: Zhang, W., Papadakis, I. E., Dovčiak, M., Bursa, M., Karas, V.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2212.02734

Black hole mass estimation using X-ray variability measurements in Seyfert galaxies

Authors: Akylas, A., Papadakis, I., Georgakakis, A.

Source: A&A 666, A127 (2022)

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies

Access URL: http://arxiv.org/abs/2208.12490

X-ray illuminated accretion discs and quasar microlensing disc sizes

Authors: Papadakis, I. E., Dovciak, M., Kammoun, E.

Source: A&A 666, A11 (2022)

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2207.12473

Strategien zur langfristigen und koordinierten baulichen und hydraulischen Sanierung von Entwässerungssystemen
56th Essener Tagung für Wasserwirtschaft

Authors: Siekmann, M., Großklags, F., Kerres, K., Papadakis, I.

Source: Gewässerschutz, Wasser, Abwasser. 256:62/1-62/15

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCCN608156378&indx=1&recIds=ETOCCN608156378

A physical model for the broadband energy spectrum of X-ray illuminated accretion discs: fitting the spectral energy distribution of NGC 5548

Authors: Dovciak, M., Papadakis, I. E., Kammoun, E. S., Zhang, W.

Source: A&A 661, A135 (2022)

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2110.01249

Exploring black-hole scaling relations via the ensemble variability of Active Galactic Nuclei

Authors: Georgakakis, A., Papadakis, I., Paolillo, M.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2105.08752

Revealing Thermal Comptonization of accretion-disk photons in IC4329A with AstroSat

Authors: Tripathi, Prakash, Dewangan, Gulab Chand, Papadakis, I. E., Singh, K. P.

Subject Terms: Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2104.13031