Non-detection of Khz Qpos in Gx 9+1 and Gx 9+9 Rudy Wijnands and Michiel Van Der Klis
نویسنده
چکیده
We observed GX 9+1 on 1996 Feb 29, Apr 21, May 29, and 1997 Feb 10 and Mar 9, and GX 9+9 on 1996 Aug 12, Oct 16, and Oct 30 with the RXTE satellite. We obtained a total of 23.3 ksec (GX 9+1) and 15.2 ksec (GX9+9) of data. The X-ray hardness-intensity diagrams (HIDs) were made using the Standard 2 data. Due to gain changes the GX 9+1 HID for the 1996 Feb 29 observation can not be directly compared with those of the other observations. The power density spectra were made using the 250μs time resolution data. We calculated rms amplitude upper limits (95% confidence) on QPOs with a FWHM of 150 Hz in the frequency range 100–1500 Hz.
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تاریخ انتشار 1997