Spectral Variability in NGC 3227 Observed by RXTE

Details Spectral Variability in NGC 3227 Observed by RXTE Spectral Variability in NGC 3227 Observed by RXTE

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.4101p&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #41.01; Bulletin of the American Astronomical Society, Vol. 30, p.871

Astronomy and Astrophysics

Astronomy

Scientific paper

NGC 3227 was observed over an ~ 90 hour period by RXTE resulting in ~ 36 hours of good exposure time (the best-sampled light curve in the 2-10 keV bandpass to date). The flux in the 2-20 keV bandpass was observed to vary significantly throughout the observation. Spectral variability is also observed on ks time scales, in the sense that the spectrum softens as the flux increases. An Fe-K line at 6.4 keV with an equivalent width of ~ 200 eV is detected in the time-averaged spectrum, consistent with ASCA results. The results of detailed analysis of the light curves and time-resolved spectra will be presented, with emphasis on to what extent the spectral variability may be due to occultation events as opposed to intrinsic variability in the slope of the continuum.

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