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We report on a study of long-term flux variations in a sample of more than 1000 AGN observed with ROSAT and in the XMM-Newton slew survey.
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Risaliti, G.; Miniutti, G.; Elvis, M.; Fabbiano, G.; Salvati, M.; Baldi, A.; Braito, V.; Bianchi, S.; Matt, G.; Reeves, J. Variable Partial Covering and A Relativistic Iron Line in NGC 1365 , ApJ, 696, 160 (2009)
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Leighly, K., Hamann, Fred; Casebeer, Darrin A.; Grupe, Dirk.: Emergence of a Broad Absorption Line Outflow in the Narrow-line Seyfert 1 Galaxy WPVS 007 , ApJ, 701, 176 (2009)
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Kalberla, P. M. W.; Burton, W. B.; Hartmann, Dap; Arnal, E. M.; Bajaja, E.; Morras, R.; Pöppel, W. G. L.: The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI. Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections , A&A, 440, 775 (2005)
2005
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McHardy, I., Koerding, E.; Knigge, C.; Uttley, P.; Fender, R. P: Active galactic nuclei as scaled-up Galactic black holes , Nature, 444, 730 (2006)
2006
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Veron-Cetty, M. P. & Veron, P.: Veron Catalog of Quasars & AGN, 12th edition , A&A, 455, 776 (2006)
2006
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Elitzur, M. & Shlosman, I.: The AGN-obscuring Torus: The End of the “Doughnut” Paradigm? , ApJ, 648, L101 (2006)
2006
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Markowitz, A., Papadakis, I., Arevalo, P., Turner, T.J., Miller, L., Reeves, J.N,: The Energy-dependent X-Ray Timing Characteristics of the Narrow-Line Seyfert 1 Mrk 766 , ApJ, 656, 116, (2007)
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Mateos, S., Barcons, X., Carrera, F. J., Page, M. J., Ceballos, M. T., Hasinger, G., Fabian, A. C.: XMM-Newton observations of the Lockman Hole. V. Time variability of the brightest AGN , A&A, 473, 105 (2007)
2007
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Saxton, R., Read, A M., Esquej, P., Freyberg, M. J., Altieri, B., Bermejo, D. The first XMM-Newton slew survey catalogue: XMMSL1 , A&A, 480, 611 (2008)
2008
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Lamastra, A., Bianchi, S., Matt, G., Perola, G. C., Barcons, X., Carrera, F. J.: The bolometric luminosity of type 2 AGN from extinction-corrected [OIII]. No evidence of Eddington-limited sources , A&A, 504, 73 (2009)
2009
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MacLeod, C. L. et al. : Modeling the Time Variability of SDSS Stripe 82 Quasars as a Damped Random Walk , ApJ, 721, 1014 (2010)
2010
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Yuan, W., Liu, B. F., Zhou, H. & Wang, T. G.: X-ray observational signature of a black hole accretion disk in an active galactic nucleus RX J1633+4718 , ApJ, 723, 508 (2010)
2010
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Denney, K. D., Peterson, B. M., Pogge, R. W., Adair, A., Atlee, D. W., Au-Yong, K., Bentz, M. C., Bird, J. C., Brokofsky, D. J., Chisholm, E.: et al. : Reverberation Mapping Measurements of Black Hole Masses in Six Local Seyfert Galaxies , ApJ, 721, 715 (2010)
2010
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Vaughan, S., Uttley, P., Pounds, K.A., Nandra, K., Strohmayer, T.E.: The rapid X-ray variability of NGC 4051 , MNRAS, 413, 2489 (2011)
2011
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Saxton, R. & Diaz-Toledo Gimeno, C.: ULS: An upper limit server for X-ray and Gamma-ray astronomy . In: ASP Conf. Ser., Vol. 442, ADASS XX ed. I. N. Evans, Accomazzi, A., Mink, D. J. & Rots, A. H., 567 (2011)
2011
Closest in time.