从RXTE(Rossi X—ray timing explorer)观测原始数据出发,分析了耀变体3C273在x射线波段2-10keV从1996年2月2日(MJD50115)到2007年8月27日(MJD 54339)的数据.一共得到了1010次观测数据的光子谱指数和相应的流量,平均每次观测时间为1666.76S.通过分析3C273在观测期间2-10keV硬X射线的能谱变化及光变行为,发现在2000年2月,2003年3、4月,2004年2、3、7月,2006年及2007年,其光子谱指数Г与流量1gF2-10kev存在显著反相关.在1999年和2000-2007年观测期间,Г与1g而。10kev月平均行为也同样存在显著反相关.对整个观测期间的光变行为作定量的分析,发现几次较大的光变,并在部分光谱拟合中发现Fe发射线存在的证据,其平均宽度为93.85121.49eV.通过分析光变强度与Fe发射线特性,发现3C273同时具有耀变体与Seyfert星系的一些性质.
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.