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- W2024953260 abstract "view Abstract Citations (47) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS HEAO 1 scanning modulation collimator discovery of an extended X-ray source at Cygnus A. Fabbiano, G. ; Doxsey, R. E. ; Johnston, M. ; Schwartz, D. A. ; Schwarz, J. Abstract The HEAO 1 modulation-collimator data associate the X-ray emission from the Cygnus A region (4U 1957 + 40) with a small area including the radio galaxy. The source appears to be extended, with a size of about 2 arcmin; it may have a complex geometry. Any point-source component must have a flux no greater than 1.3 UFU. A lower limit of 1 microgauss is placed on the magnetic field in the radio lobes, based on the upper limit on the X-ray flux due to inverse Compton scattering of radio electrons on the 2.7-K microwave background radiation. The X-ray emission is more likely due to driven accretion of the intercluster gas onto the giant cD radio galaxy. Therefore this source appears to be similar to the Virgo and Perseus clusters. The density derived for the X-ray-emitting gas is too small for its thermal pressure to confine the radio source. Publication: The Astrophysical Journal Pub Date: June 1979 DOI: 10.1086/182963 Bibcode: 1979ApJ...230L..67F Keywords: Collimators; Cygnus Constellation; Heao 1; Radio Galaxies; X Ray Sources; Galactic Clusters; Modulation; Scanning; Astrophysics; Radio Galaxies:X-Ray Sources; X-Ray Sources:Surveys full text sources ADS | data products SIMBAD (1) NED (1)" @default.
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- W2024953260 date "1979-06-01" @default.
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- W2024953260 title "HEAO 1 scanning modulation collimator discovery of an extended X-ray source at Cygnus A" @default.
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