Observations of Type 1 Seyfert galaxies with the HEAO-1 scanning modulation collimator

Details Observations of Type 1 Seyfert galaxies with the HEAO-1 scanning modulation collimator Observations of Type 1 Seyfert galaxies with the HEAO-1 scanning modulation collimator

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.188..813g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 188, Sept. 1979, p. 813-817.

Astronomy and Astrophysics

Astronomy

13

Collimators, Heao 1, Seyfert Galaxies, X Ray Sources, Ariel Satellites, Galactic Nuclei, Spaceborne Astronomy, Uhuru Satellite

Scientific paper

Precise positions of four X-ray sources associated with Type 1 Seyfert galaxies are reported which were measured with the HEAO 1 scanning modulation collimator. The Seyferts are confirmed as the X-ray emitters in each case. The sources (and corresponding galaxies) studied include 2A 0551+466 (NGC 4151), 2A 1207+397 (MCG 8-11-11), 2A 1914-589 (ESO 141-G55), and A 1021+198 (NGC 3227). It is found that the X-ray source is located in the nucleus or the nuclear region for NGC 4151 and that the galaxy is unresolved by the present instrument in the other cases.

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