Observations of the giant radio lobes region of Centaurus A with SAS 3

Details Observations of the giant radio lobes region of Centaurus A with SAS 3 Observations of the giant radio lobes region of Centaurus A with SAS 3

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...245..840m&link_type=abstract

Astrophysical Journal, Part 1, vol. 245, May 1, 1981, p. 840-844.

Astronomy and Astrophysics

Astrophysics

15

Elliptical Galaxies, Galactic Radio Waves, Galactic Structure, Radio Galaxies, X Ray Sources, X Ray Spectra, Diffuse Radiation, Galactic Nuclei, Heao 2, High Energy Electrons, Interplanetary Magnetic Fields, Lobes, Point Sources, Raster Scanning, Sas-3, Synchrotron Radiation

Scientific paper

Observations of the X-ray flux from the extended radio lobes of the galaxy Centaurus A obtained with the SAS 3 observatory are reported. The 15 x 15 deg region that includes the lobes was mapped by superposing data from raster scans with the horizontal tubular collimator detectors, which have a 1.7 deg FWHM circular field of view. Data obtained is consistent with the presence of superposed emission from the point sources NGC 5128 and MX 1312-42, a previously unreported source detected by the Einstein Observatory IPC. Fluxes of 4.63 + or - 0.14 x 10 to the -10th and 4.6 + or - 0.6 x 10 to the -11th ergs/sq cm per sec were measured for NGC 5128 and MX 1312-42, respectively, with best fit power law spectra of indices 0.83 + or - 0.04 and 0.62 + or - 0.10 and hydrogen column densities of 1.23 + or - 0.10 x 10 to the 23rd and 9.7 + or - 15.0 x 10 to the 21st atoms/sq cm. Results imply an upper limit of 2.9 x 10 to the 11th for the X-ray emission from the extended radio lobes of Cen A between 2 and 10 keV, which indicates a lower limit to the magnetic field in the lobes of 1.6 x 10 to the -6th gauss.

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