Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010acasn..51..236w&link_type=abstract
Acta Astronomica Sinica, vol. 51, no. 3, p. 236-244
Astronomy and Astrophysics
Astronomy
Quasars: Individual, X-Rays: Galaxies, Methods: Data Analysis, Radiation Mechanisms: Non-Thermal
Scientific paper
The X-ray raw data of blazar 3C 273 from RXTE observations are analyzed. The observational time is from Feb. 2rd 1996 to Aug. 27th 2007. The average time for each observation is 1666.76 s. Totally, the photon spectral indexes and corresponding fluxes of 1010 data are derived. The spectral properties of 3C 273 in 2~10 keV band are analyzed. It is found that there is a significant anti-correlation between the photon index and flux in February 2000, March and April 2003, February, March and July 2004, 2006 and 2007. The variability in entire observations has been investigated and some significant variations in 2~10 keV band are found. There is an evidence of Fe emission lines in some spectral fittings. Its average width is 93.85±21.49 eV. By analyzing the intensity of X-ray variability and the properties of Fe emission lines, it is found that 3C 273 has both properties which belong to blazars and Seyfert galaxies.
Bao Kun-Sen
Dai Ben Zhong
Liu Zhi-Min
Wu Xiaolin
Yan Da-Hai
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