RXTE observations of Seyfert-2 galaxies: evidence for spectral variability

Details RXTE observations of Seyfert-2 galaxies: evidence for spectral variability RXTE observations of Seyfert-2 galaxies: evidence for spectral variability

2000-08-18

arxiv.org/abs/astro-ph/0008295v1

Mon.Not.Roy.Astron.Soc. 322 (2001) 218

Astronomy and Astrophysics

Astrophysics

15 pages, submitted to the MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04059.x

We present a series of RXTE observations of the nearby obscured Seyfert galaxies ESO103-G35, IC5063, NGC4507 and NGC7172. The period of monitoring ranges from seven days for NGC7172 up to about seven months for ESO103-G035. The spectra of all galaxies are well fit with a highly obscured (N_H>10^23 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 NGC4507. The observed flux presents strong variability on day timescales 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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