Erratum to: Corrigenda et Addenda

Bruyn, J.; Haak, B.; Levie, S. H.; Thiel, P. J. J. Van; Wetering, E. Van De

doi:10.1007/978-94-009-0811-6_92

Cited by 2 publications

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“…Next, we combined the XRT spectra with the BAT ones (from the 70-month BAT catalogue, Baumgartner et al 2013) 5 to perform the spectral analysis over the 0.3-100 keV energy range. We adopted a simple absorbed power law model to fit the source spectra where absorption is partly due to a Galactic column density in the source direction (fixed value) and partly to an intrinsic column density (free parameter).…”

Section: Discussionmentioning

confidence: 99%

The column density distribution of hard X-ray radio galaxies

Panessa

Bassani

Landi

et al. 2016

Mon. Not. R. Astron. Soc.

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In order to investigate the role of absorption in AGN with jets, we have studied the column density distribution of a hard X-ray selected sample of radio galaxies, derived from the INTEGRAL/IBIS and Swift /BAT AGN catalogues (∼ 7-10% of the total AGN population). The 64 radio galaxies have a typical FRII radio morphology and are characterized by high 20-100 keV luminosities (from 10 42 to 10 46 erg/s) and high Eddington ratios (Log L Bol /L Edd typically larger than ∼ 0.01). The observed fraction of absorbed AGN (N H > 10 22 cm −2 ) is around 40% among the total sample, and ∼ 75% among type 2 AGN. The majority of obscured AGN are narrow line objects, while unobscured AGN are broad line objects, obeying to the zeroth-order predictions of unified models. A significant anti-correlation between the radio core dominance parameter and the X-ray column density is found. The observed fraction of Compton thick AGN is ∼ 2-3%, in comparison with the 5-7% found in radio-quiet hard X-ray selected AGN. We have estimated the absorption and Compton thick fractions in a hard X-ray sample containing both radio galaxies and non-radio galaxies and therefore affected by the same selection biases. No statistical significant difference was found in the absorption properties of radio galaxies and non radio galaxies sample. In particular, the Compton thick objects are likely missing in both samples and the fraction of obscured radio galaxies appears to decrease with luminosity as observed in hard X-ray non-radio galaxies.

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Section: Discussionmentioning

confidence: 99%

The column density distribution of hard X-ray radio galaxies

Panessa

Bassani

Landi

et al. 2016

Mon. Not. R. Astron. Soc.

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“…It is possible that Huygens's initial resistance was nothing more than a demonstration of the courtesy demanded by the protocols of accepting lavish gifts from clients. 41 Yet Huygens could have obviated the painting's ability to act as a challenging reminder of his obligations to Rembrandt even if he had accepted it. Jaap van der Veen has recently documented that Joan Huydecoper quickly disposed of a painting of the Entombment that Jan Lievens had given him as a gift after completing a portrait commission in 1659.…”

Section: Rembrandt's Gifts To Huygensmentioning

confidence: 99%

Rembrandt’s Gifts: A Case Study of Actor-Network-Theory

Zell¹

2011

JHNA

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This study explores the applicability of Actor-Network-Theory, a recent paradigm of social theory, to the investigation of Rembrandt's relations with patrons and collectors. Known by the acronym ANT, the method privileges objects as critical agents in creating, sustaining, and extending social ties and thus offers a model for capturing the dynamics underlying the interdependencies between Rembrandt, his art, his patrons, and collectors. I focus on Rembrandt's works presented and circulated as gifts, which epitomize the short-lived assemblies between humans and objects that ANT considers the cornerstone of social activity. Drawing on ANT's approach, I highlight the agency of these works in materializing and enhancing the reciprocal ties that bound networks of collectors and liefhebbers together with Rembrandt.

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Erratum to: Corrigenda et Addenda

Cited by 2 publications

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The column density distribution of hard X-ray radio galaxies

The column density distribution of hard X-ray radio galaxies

Rembrandt’s Gifts: A Case Study of Actor-Network-Theory

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