Evidence of an Ionized Iron Emission Line from the Radio-quiet Quasar E1821+643 by ASCA

Details Evidence of an Ionized Iron Emission Line from the Radio-quiet Quasar E1821+643 by ASCA Evidence of an Ionized Iron Emission Line from the Radio-quiet Quasar E1821+643 by ASCA

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...486..763y&link_type=abstract

Astrophysical Journal v.486, p.763

Astronomy and Astrophysics

Astronomy

14

Galaxies: Quasars: Individual Alphanumeric: E1821+643, X-Rays: Galaxies

Scientific paper

We present the results of an ASCA observation of the radio-quiet quasar E1821+643. The 2--10 keV flux and the power-law index are consistent with the values reported previously by EXOSAT, Ginga, and BBXRT. The iron K-emission line feature discovered by the Ginga observations is confirmed, and its redshift-corrected, line-center energy is better determined to be 6.58 +/- 0.05 keV. This line feature shows marginal broadening with an upper limit of 180 eV in Gaussian sigma (in the quasar rest frame). The line equivalent width is 170 +/- 50 eV in the quasar rest frame, which is consistent with the Ginga measurement, and the contribution from the quasar-associated cluster of galaxies is estimated to be negligible.

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