Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. V. Discovery of a z=4.28 QSO near the RASS source RX J1028.6-0844.

Details Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. V. Discovery of a z=4.28 QSO near the RASS source RX J1028.6-0844. Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. V. Discovery of a z=4.28 QSO near the RASS source RX J1028.6-0844.

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...323l..21z&link_type=abstract

Astronomy and Astrophysics, v.323, p.L21-L24

Astronomy and Astrophysics

Astrophysics

32

Surveys, X-Rays: General, X-Rays: Galaxies, (Galaxies:) Quasars: General, Galaxies: Active, (Galaxies:) Quasars: Emission Lines

Scientific paper

We report on the discovery of the first z>4 QSO in the ROSAT All Sky Survey (RASS) near the X-ray source RX J1028.6-0844. From the Lyα emission line found in an optical spectrum we measured z=4.276+/-0.005. This is so far the highest redshift for a QSO in the RASS. The RASS X-ray count rate of 0.035ct/s leads to an X-ray flux of f_x_=8.3310^-13^erg/s/cm and a luminosity of L_x_=~6x10^46^erg/s in the 2-10keV rest frame energy band of the QSO if galactic column density of neutral hydrogen and a photon index {GAMMA}=-2 is assumed. The spectral energy distribution as inferred from the observed hardness ratios indicates the presence of considerable intrinsic absorption in the QSO around 2-2.5keV.

Affiliated with

Also associated with

No associations

Rating

Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. V. Discovery of a z=4.28 QSO near the RASS source RX J1028.6-0844. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. V. Discovery of a z=4.28 QSO near the RASS source RX J1028.6-0844., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources. V. Discovery of a z=4.28 QSO near the RASS source RX J1028.6-0844. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1183984