The X-ray jet and lobes of PKS 1354+195 (=4C 19.44)

D. A. Schwartz*, D. E. Harris, H. Landt, A. Siemiginowska, H. L. Marshall, J. M. Gelbord, E. S. Perlman, M. Georganopoulos, M. Birkinshaw, D. M. Worrall, C. C. Cheung, L. Stawarz, S. G. Jorstad, A. P. Marscher, Y. Uchiyama, C. M. Urry

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

7 Citations (Scopus)


We present a Chandra image of the quasar, jet, and lobes of PKS 1354+195 (=4C 19.44). The radio jet is 18 arcsec long, and appears to be very straight. The length gives many independent spatial resolution elements in the Chandra image while the straightness implies that the geometrical factors are constant along the jet although their values are uncertain. We also have 4 frequency radio images with half to one arcsecond angular resolution, and use HST and Spitzer data to study the broad band spectral energy distributions. The X-ray and radio spectra are both consistent with a spectrum f(nu) alpha nu(-0.7) stop for the integrated jet. Using that spectral index, the model of inverse Compton scattering of electrons on the cosmic microwave background (IC/CMB) gives magnetic field strengths and Doppler factors that are relatively constant along the jet. Extended X-ray emission is evident in the direction of the otherwise unseen counter-jet. X-ray emission continues past the radio jet to the South, and is detected within both the southern and northern radio lobes.

Original languageEnglish
Pages (from-to)341-345
Number of pages5
JournalAstrophysics and Space Science
Issue number1-3
Publication statusPublished - Oct 2007
Event5th Stromlo Symposium on Disks, Winds and Jets - From Planets to Quasars - Canberra, Australia
Duration: 3 Dec 20068 Dec 2006


  • (Galaxies : ) quasars : individual (4C 19.44, PKS 1354+135)
  • galaxies : jets
  • X-rays : individual (4C 19.44, PKS 1354+135)
  • radio continuum : general
  • magnetic fields


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