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RXTE observations of Seyfert 2 galaxies: evidence for spectral variability.
- Source :
- Monthly Notices of the Royal Astronomical Society; 4/1/2001, Vol. 322 Issue 2, p218-230, 13p, 4 Diagrams, 14 Charts, 1 Graph
- Publication Year :
- 2001
-
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[sub H]>10[sup 23] cm[sup -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. [ABSTRACT FROM AUTHOR]
- Subjects :
- SEYFERT galaxies
SPECTRAL energy distribution
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 322
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 5640018
- Full Text :
- https://doi.org/10.1046/j.1365-8711.2001.04059.x