Open AccessAn XMM–Newton observation of the narrow‐line Seyfert 1 galaxy Markarian 896
Author(s) -
Page K. L.,
O'Brien P. T.,
Reeves J. N.,
Breeveld A. A.
Publication year - 2003
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2003.06403.x
Subject(s) - physics , astrophysics , black body radiation , galaxy , line (geometry) , spectral line , equivalent width , emission spectrum , photon , ionization , astronomy , optics , ion , radiation , geometry , mathematics , quantum mechanics
We present XMM–Newton observations of the narrow‐line Seyfert 1 galaxy Markarian 896. Over the 2–10 keV band, an iron emission line, close to 6.4 keV, is seen. The line is just resolved and has an equivalent width of ∼170 eV. The broad‐band spectrum is well modelled by a power‐law slope of Γ∼ 2.03 , together with two blackbody components to fit the soft X‐ray excess. Using a more physical two‐temperature Comptonization model, a good fit is obtained for an input photon distribution of kT ∼ 60 eV and Comptonizing electron temperatures of ∼0.3 and 200 keV. The soft excess cannot be explained purely through the reprocessing of a hard X‐ray continuum by an ionized disc reflector.