Gallo, Luigi C.; MacMackin, C.; Vasudevan, R.; Cackett, E. M.; Fabian, A. C.; Panessa, F.(Oxford University Press, 2013-07)
<p>1ES 1927+654 is an active galactic nucleus (AGN) that appears to defy the unification model. It exhibits a type-2 optical spectrum, but possesses little X-ray obscuration. XMM–Newton and Suzaku observations obtained in 2011 are used to study the X-ray properties of 1ES 1927+654. The spectral energy distribution derived from simultaneous optical-to-X-ray data obtained with XMM–Newton shows that the AGN has a typical Eddington ratio (L/L<sub>Edd</sub> = 0.014 – 0.11). The X-ray spectrum and rapid variability are consistent with originating from a corona surrounding a standard accretion disc. Partial covering models can describe the X-ray data; however, the narrow Fe Kα emission line predicted from standard photoelectric absorption is not detected. Ionized partial covering also favours a high-velocity outflow (v ≈ 0.3c), which requires the kinetic luminosity of the wind to be ≳ 30 per cent of the bolometric luminosity of the AGN. Such values are not unusual, but for 1ES 1927+654 it requires that the wind is launched very close to the black hole (∼10 r<sub>g</sub>). Blurred reflection models also work well at describing the spectral and timing properties of 1ES 1927+654 if the AGN is viewed nearly edge-on, implying that an inner accretion disc must be present. The high inclination is intriguing as it suggests 1ES 1927+654 could be orientated like a Seyfert 2, in agreement with its optical classification, but viewed through a tenuous torus.</p>...
Mattoon, C. M.; Sarazin, F.; Hackman, G.; Cunningham, E. S.; Austin, Roby Anne Elizabeth, 1974-; Ball, G. C.; Chakrawarthy, R. S.; Finlay, P.; Garrett, P. E.; Grinyer, G. F.(American Physical Society, 2007)
Gruberbauer, Michael; Balona, L. A.; Cunha, M. S.; Kurtz, D. W.; Saio, H.; White, T. R.; Christensen-Dalsgaard, J.; Kjeldsen, H.; Christiansen, J. L.; Hall, J. R.(Oxford University Press, 2011)
Bertolasi, Valerio; Gilli, Paola; Ferretti, Valeria; Gilli, Gastone; Vaughan, Keith, 1943-(Royal Society of Chemistry and the Centre National de la Recherche Scientifique, 1999)