2008A&A...483..749D


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET01:05:56

2008A&A...483..749D - Astronomy and Astrophysics, volume 483, 749-758 (2008/6-1)

An X-ray view of absorbed INTEGRAL AGN.

DE ROSA A., BASSANI L., UBERTINI P., PANESSA F., MALIZIA A., DEAN A.J. and WALTER R.

Abstract (from CDS):

We present a 0.2-200keV broadband study of absorbed Active Galactic Nuclei (AGN) observed with INTEGRAL, XMM-Newton, Chandra, and ASCA to investigate the continuum shape and the absorbing/reflecting medium properties. The sources are selected in the INTEGRAL AGN sample to have a 20-100keV flux below 8x10–11erg/cm2/s (5mCrab), and are characterized by a 2-10keV flux in the range (0.8-10)x10–11erg/cm2/s. The high quality of data allow us a detailed study of the intrinsic and reflected continuum components. In particular, the analysis performed on the combined broadband spectra allow us to investigate the presence of Compton reflection features and high energy cutoff in these objects. The column density of the absorbing gas establishes the Compton thin nature for three sources in which a measure of the absorption was still missing. The Compton thin nature of all the sources in this small sample is also confirmed by the diagnostic ratios Fx/F[OIII]. The Compton reflection components we measure, reflection continuum and iron line, are not immediately compatible with a scenario in which the absorbing and reflecting media are one and the same, i.e. the obscuring torus. A possible solution is that the absorption is more effective than reflection, e.g. under the hypothesis that the absorbing/reflecting medium is not uniform, like a clumpy torus, or that the source is observed through a torus with a very shallow opening angle. The high energy cutoff (a lower limit in two cases) is found in all sources of our sample and the range of values is in good agreement with that found in type 1 Seyfert galaxies. At lower energies there is clear evidence of a soft component (reproduced with a thermal and/or scattering model), in six objects.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies - galaxies: Seyfert - galaxies: nuclei

CDS comments: Note 1 : IGR J12415+5750 is a probable misprint for IGR J12415-5750.

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 788 Sy2 02 01 06.4622976350 -06 48 57.146217363   13.71 12.76 11.79   ~ 215 0
2 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4141 2
3 Mrk 3 Sy2 06 15 36.458 +71 02 15.24 14.21 14.03 12.97     ~ 855 3
4 2MASX J07561963-4137420 Sy2 07 56 19.636 -41 37 42.07           ~ 42 1
5 2MASX J10402231-4625264 Sy2 10 40 22.313 -46 25 26.45   16.8       ~ 65 0
6 2MASX J12024767-5350082 Sy2 12 02 47.6225970101 -53 50 07.801488651   17.3       ~ 62 0
7 NGC 4549 G 12 35 21.273 +58 56 58.84   16       ~ 13 0
8 2MASX J12390630-1610472 Sy2 12 39 06.2810518255 -16 10 47.227607708           ~ 74 0
9 2MASX J12412572-5750038 Sy2 12 41 25.7672413457 -57 50 03.481040498   17.4 16.9     ~ 62 0
10 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1025 2
11 IC 4518A Sy2 14 57 40.5 -43 07 54   16.64   13.74   ~ 74 0
12 NGC 6300 Sy2 17 16 59.473 -62 49 13.98   10.88 13.08 9.44 10.2 ~ 366 0
13 2MASS J17511362-2012145 Sy1 17 51 13.6163988533 -20 12 14.610272343           ~ 26 0
14 ESO 103-35 Sy2 18 38 20.3207055742 -65 25 39.142872479   14.75 14.53 13.24   ~ 278 0
15 MCG+04-48-002 Sy2 20 28 35.061 +25 44 00.18   18       ~ 114 1

    Equat.    Gal    SGal    Ecl

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2020.11.28-01:05:56

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