RXTE observations of Seyfert 2 galaxies: evidence for spectral variability |
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| Authors: | I Georgantopoulos I E Papadakis |
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| Institution: | Institute of Astronomy and Astrophysics, National Observatory of Athens, Lofos Koufou, Palaia Penteli, 15236, Athens, Greece;Physics Department, University of Crete, 71003, Heraklion, Greece |
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| Abstract: | We present a series of RXTE observations of the nearby obscured Seyfert galaxies ESO103-G35, IC5063, NGC 4507 and NGC 7172. The period of monitoring ranges from seven days for NGC 7172 up to about seven months for ESO103-G035. The spectra of all galaxies fit well with a highly obscured ( N H>1023 cm?2) power-law and an Fe line at 6.4 keV. We find strong evidence for the presence of a reflection component in ESO103-G35 and NGC 4507. The observed flux presents strong variability on day time-scales in all objects. Spectral variability is also detected in the sense that the spectrum steepens with increasing flux similar to the behaviour witnessed in some Seyfert 1 galaxies. |
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| Keywords: | galaxies: active galaxies: individual: ESO103-G35 galaxies: individual: IC5063 galaxies: individual: NGC 4507 galaxies: individual: NGC 7172 X-rays: galaxies |
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