A REFLECTION-DOMINATED X-RAY-SPECTRUM DISCOVERED BY ASCA IN THE CIRCINUS GALAXY

Authors
MATT G FIORE F PEROLA GC PIRO L FINK HH GRANDI P MATSUOKA M OLIVA E SALVATI M
Citation
G. Matt et al., A REFLECTION-DOMINATED X-RAY-SPECTRUM DISCOVERED BY ASCA IN THE CIRCINUS GALAXY, Monthly Notices of the Royal Astronomical Society, 281(4), 1996, pp. 69-73
Citations number
25
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Monthly Notices of the Royal Astronomical Society → ACNP
ISSN journal
00358711
Volume
281
Issue
4
Year of publication
1996
Pages
69 - 73
Database
ISI
SICI code
0035-8711(1996)281:4<69:ARXDBA>2.0.ZU;2-Q
Abstract
We report the first pointed X-ray observation, made by ASCA, of the ne arby Seyfert 2 galaxy in Circinus. The spectrum consists of a very pro minent (EW similar to 2 keV) fluorescent 6.4-keV iron line, a very fla t continuum (photon spectral index less than 1) and other lines, inclu ding one at similar to 7 keV that is probably due, at least in part, t o iron K beta fluorescent emission. The spectrum is consistent with Co mpton scattering and fluorescent emission from cold matter illuminated by an obscured active nucleus.