Skip to main content

6 Result(s)

within J. A. Biretta Remove this filter

and

  1. No Access

    Chapter and Conference Paper

    The large scale X-ray emission from M 87

    We describe asymmetrical features in a long exposure X-ray map of M 87 made with the ROSAT High Resolution Imager (HRI). A bright triangular region is marked by a linear ‘spur’ along one edge. The structure of...

    D. E. Harris, J. A. Biretta, W. Junor in The Radio Galaxy Messier 87 (1999)

  2. No Access

    Chapter and Conference Paper

    X-ray variability in M 87: 1992 – 1998

    Beginning in 1995 June, we have obtained an observation of M 87 with the ROSAT High Resolution Imager (HRI) every 6 months. We present the measurements of X-ray intensity for the core and knot A through 1998 J...

    D. E. Harris, J. A. Biretta, W. Junor in The Radio Galaxy Messier 87 (1999)

  3. No Access

    Chapter and Conference Paper

    HST observations of the M 87 jet

    We present highlights and preliminary results of our HST observing programs on the M 87 jet. We confirm previously known similarities between the radio and optical jets, but also describe a wealth of differenc...

    J. A. Biretta, E. Perlman, W. B. Sparks, F. Macchetto in The Radio Galaxy Messier 87 (1999)

  4. No Access

    Chapter and Conference Paper

    Radio observations of the M 87 jet

    We review observations of the M 87 jet made at radio frequencies and summarize some of the insights gained therefrom.

    J. A. Biretta in The Radio Galaxy Messier 87 (1999)

  5. No Access

    Chapter and Conference Paper

    The nuclear jet in M87

    J. A. Biretta, M. J. Reid in Active Galactic Nuclei (1988)

  6. No Access

    Article

    Non-radial ejection in 3C345

    The radio source 3C345 is associated with a 16th magnitude quasar with z = 0.595 (ref. 1). At radio wavelengths it has six major components. From largest to smallest these are: a low brightness halo2; a 3 kpc cur...

    J. A. Biretta, M. H. Cohen, S. C. Unwin, I. I. K. Pauliny-Toth in Nature (1983)