2003A&A...398..107B


Query : 2003A&A...398..107B

2003A&A...398..107B - Astronomy and Astrophysics, volume 398, 107-111 (2003/1-4)

XMM-Newton observations of ULIRGs: A Compton-thick AGN in IRAS 19254-7245.

BRAITO V., FRANCESCHINI A., DELLA CECA R., SEVERGNINI P., BASSANI L., CAPPI M., MALAGUTI G., PALUMBO G.G.C., PERSIC M., RISALITI G. and SALVATI M.

Abstract (from CDS):

We present the XMM-Newton observation of the merging system IRAS 19254-7245, also known as The Superantennae, whose southern nucleus is classified as a Seyfert 2 galaxy. The XMM- Newton data have allowed us to perform a detailed X-ray imaging and spectral analysis of this system. We clearly detect, for the first time in this system, a strong (EW∼1.4keV) Fe emission line at 6.49±0.1keV (rest-frame). The X-ray spectrum requires a soft thermal component (kT∼0.9keV; L0.5–2∼4x1041erg/s), likely associated with the starburst, and a hard power-law continuum above 2keV (observed L2–10∼4x1042erg/s). We confirm the flatness of this latter component, already noted in previous ASCA data. This flatness, together with the detection of the strong Fe-Kα line and other broad band indicators, suggest the presence of a Compton-thick AGN with intrinsic luminosity >1044erg/s. We show that a Compton-thick model can perfectly reproduce the X-ray spectral properties of this object.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: starburst - X-rays: galaxies - galaxies: individual: IRAS 19254-7245

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4323 2
2 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1556 2
3 NAME Super Antennae Sy2 19 31 21.4272801984 -72 39 21.442847832   17.39 16.37 14.65   ~ 284 2

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2022.05.24-10:35:05

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