2000ApJ...533L..79M

Query : 2000ApJ...533L..79M

2000ApJ...533L..79M - Astrophys. J., 533, L79-L82 (2000/April-3)

Thomson thick X-ray absorption in a broad absorption line quasar, PG 0946+301.

MATHUR S., GREEN P.J., ARAV N., BROTHERTON M., CRENSHAW M., DEKOOL M., ELVIS M., GOODRICH R.W., HAMANN F., HINES D.C., KASHYAP V., KORISTA K., PETERSON B.M., SHIELDS J.C., SHLOSMAN I., VAN BREUGEL W. and VOIT M.

Abstract (from CDS):

We present a deep ASCA observation of a broad absorption line quasar (BALQSO) PG 0946+301. The source was clearly detected in one of the gas imaging spectrometers, but not in any other detector. If BALQSOs have intrinsic X-ray spectra similar to normal radio-quiet quasars, our observations imply that there is Thomson thick X-ray absorption (NH≳1024 cm–2) toward PG 0946+301. This is the largest column density estimated so far toward a BALQSO. The absorber must be at least partially ionized and may be responsible for attenuation in the optical and UV. If the Thomson optical depth toward BALQSOs is close to 1, as inferred here, then spectroscopy in hard X-rays with large telescopes like XMM would be feasible.

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Journal keyword(s): Galaxies: Active - Galaxies: Quasars: Absorption Lines - Galaxies: Quasars: Individual: Alphanumeric: PG 0946+301 - X-Rays: Galaxies

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO J0949+2955 QSO 09 49 41.1069232848 +29 55 19.261130988   16.00 16.2     ~ 150 0
2 QSO B2225-055 QSO 22 28 30.3464915928 -05 18 54.694692252   18.45 17.70     ~ 159 0

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