X-ray Absorption Towards The Einstein Ring Source PKS1830-211

Abstract

PKS1830-211 is an unusually radio-loud gravitationally lensed quasar. In the radio, the system appears as two compact, dominant features surrounded by relatively extended radio emission which forms an Einstein Ring. As the line of sight to it passes close to our Galactic center, PKS1830-211 has not been detected in wave-bands other than the radio and X-ray so far. Here we present X-ray data of PKS1830-211 observed with ROSAT PSPC. The X-ray spectrum shows that absorption in excess of the Galactic contribution is highly likely, which at the redshift of the lensing galaxy ($z_l=0.886$) corresponds to N${}_H=3.5_{-0.5}^{+0.6}\times 10^{22}$ atoms cm${}^{-2}$. The effective optical extinction is large, A${}_V$(observed)\gax5.8. When corrected for this additional extinction, the two point optical to X-ray slope \aox\ of PKS1830-211 lies just within the observed range of quasars. It is argued here that both compact images must be covered by the X-ray absorber(s) which we infer to be the lensing galaxy(galaxies). The dust to gas ratio along the line of sight within the lensing galaxy is likely to be somewhat larger than for our Galaxy.

To appear in the ApJ Vol. 484, July 20, 1997. LaTex, 15 pages. Requires AAS macros

Cited by in corpus (18)

• Dust and Extinction Curves in Galaxies with z>0: The Interstellar Medium of Gravitational Lens Galaxies
• HST Observations of 10 Two-Image Gravitational Lenses
• Molecules at z=0.89: A 4-mm-rest-frame absorption line survey toward PKS 1830-211
• Gamma-ray flaring activity from the gravitationally lensed blazar PKS 1830-211 observed by Fermi LAT
• XMM-Newton observations of a sample of gamma-ray loud active galactic nuclei
• The kinetic temperature of a molecular cloud at redshift 0.9: Ammonia in the gravitational lens PKS1830-211
• X-ray Observations of Gravitationally Lensed Quasars; Evidence for a Hidden Quasar Population
• Cosmic alignment towards the radio Einstein ring PKS 1830-211 ?
• Helical Jet in the Gravitationally Lensed Blazar PKS1830-211
• Submillimeter water and ammonia absorption by the peculiar z~0.89 interstellar medium in the gravitational lens of the PKS 1830-211 system
• The broad-band X-ray spectrum of the blazar PKS B1830-211 by Chandra and INTEGRAL
• Probing The Dust-To-Gas Ratio of z > 0 Galaxies Through Gravitational Lenses
• Detection of CI in absorption towards PKS 1830-211 with the eSMA
• MALS SALT-NOT survey of MIR-selected powerful radio-bright AGN at 0<z<3.5
• Variable X-ray Absorption toward Gravitationally-Lensed Blazar PKS1830-211
• High energy properties of PKS 1830-211
• A new constraint on the molecular oxygen abundance at $z\sim 0.886$
• Breaks in the X-ray spectra of high redshift blazars and the intervening medium