2011ApJ...736...81T


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST14:21:29

2011ApJ...736...81T - Astrophys. J., 736, 81 (2011/August-1)

XMM follow-up observations of three Swift BAT-selected active galactic nuclei.

TRIPPE M.L., REYNOLDS C.S., KOSS M., MUSHOTZKY R.F. and WINTER L.M.

Abstract (from CDS):

We present XMM-Newton observations of three active galactic nuclei (AGNs) taken as part of a hunt to find very heavily obscured Compton-thick AGNs. For obscuring columns greater than 1025/cm2, AGNs are only visible at energies below 10 keV via reflected/scattered radiation, characterized by a flat power law. We therefore selected three objects (ESO 417-G006, IRAS 05218-1212, and MCG -01-05-047) from the Swift Burst Alert Telescope (BAT) hard X-ray survey catalog with Swift X-ray Telescope (XRT) 0.5-10 keV spectra with flat power-law indices as candidate Compton-thick sources for follow-up observations with the more sensitive instruments on XMM-Newton. The XMM spectra, however, rule out reflection-dominated models based on the weakness of the observed Fe Kα lines. Instead, the spectra are well fit by a model of a power-law continuum obscured by a Compton-thin absorber plus a soft excess. This result is consistent with previous follow-up observations of two other flat-spectrum BAT-detected AGNs. Thus, out of the six AGNs in the 22 month BAT catalog with apparently flat Swift XRT spectra, all five that have had follow-up observations are not likely Compton thick. We also present new optical spectra of two of these objects, IRAS 05218-1212 and MCG -01-05-047. Interestingly, though both the AGNs have similar X-ray spectra, their optical spectra are completely different, adding evidence against the simplest form of the geometric unified model of AGNs. IRAS 05218-1212 appears in the optical as a Seyfert 1, despite the ∼8.5x1022/cm2 line-of-sight absorbing column indicated by its X-ray spectrum. MCG -01-05-047's optical spectrum shows no sign of AGN activity; it appears as a normal galaxy.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual (ESO 417-G006, IRAS 05218-1212, MCG -01-05-047) - X-rays: galaxies

Simbad objects: 10

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Number of rows : 10

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 612 Sy2 01 33 57.751 -36 29 35.80   13.90 13.15 12.33   ~ 200 0
2 MCG-01-05-047 Sy2 01 52 49.004 -03 26 48.56   13.9   13.8 13.2 ~ 94 0
3 ESO 417-6 Sy2 02 56 21.530 -32 11 08.17   14.29   13.13   ~ 66 0
4 2MASX J03565655-4041453 SyG 03 56 56.5217153948 -40 41 45.910075460   16.77   15.45   ~ 25 0
5 2MASX J04532576+0403416 Sy2 04 53 25.7394366595 +04 03 41.800055196   15.0       ~ 100 0
6 IRAS 05218-1212 Sy1 05 24 06.9091453358 -12 10 08.855662980   15.70 14.84 15.08   ~ 58 1
7 ESO 5-4 Sy2 06 05 41.721 -86 37 55.02   13.55   11.88 12.2 ~ 130 0
8 Mrk 417 Sy2 10 49 30.9256835232 +22 57 52.380753630   16.0       ~ 77 0
9 LAWD 37 WD* 11 45 42.9170659451 -64 50 29.464090822 11.08 11.725 11.513 11.34 11.163 DQ 238 0
10 Feige 110 HS* 23 19 58.3995050606 -05 09 56.170282845 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 575 1

    Equat.    Gal    SGal    Ecl

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2021.04.16-14:21:29

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