Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasj...46l..59f&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan, vol. 46, no. 3, p. L59-L63
Astronomy and Astrophysics
Astronomy
110
Astronomical Satellites, Seyfert Galaxies, X Ray Absorption, X Ray Astronomy, Charge Coupled Devices, Ionization, Red Shift
Scientific paper
We report the first X-ray observations of the Seyfert 1 galaxy MCG-6-30-15 obtained at medium spectral resolution. The partially-ionized, 'warm' absorber is resolved and shown to be due to O VII and O VIII. The main absorption edge agrees with that of O VII at the redshift of the galaxy to within 1%. The column density of the absorbing material is greater by a factor of 2 in the first of our two obsevations, which were 3 weeks apart, while the mean flux is slightly lower and the ionization parameter slightly higher. We also discuss the flourescent iron emssion line seen in the source, which is at 6.40 keV. The line is significantly broadened, with a Full Width at Half Maximum (FWHM) of about 0.4 keV.
Fabian Andrew C.
Inoue Shigeru
Kunieda Hideyo
Matsuoka Masaru
Mihara Tatehiro
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