Power Spectrum Density of Long-Term MAXI Data
Abstract
Monitor of All-sky X-ray Image (MAXI) on the International Space Station has been observing the X-ray sky since 2009 August 15. It has accumulated the X-ray data for about four years, so far. X-ray objects are usually variable and their variability can be studied by the power spectrum density (PSD) of the X-ray light curves. We applied our method to calculate PSDs of several kinds of objects observed with MAXI. We obtained significant PSDs from 16 Seyfert galaxies. For blackhole binary Cygnus X-1 there was a difference in the shape of PSD between the hard state and the soft state. For high mass X-ray binaries, Cen X-3, SMC X-1, and LMC X-4, there were several peaks in the PSD corresponding to the orbital period and the superorbital period.
- Publication:
-
JPS Conference Proceedings
- Pub Date:
- 2014
- DOI:
- 10.7566/JPSCP.1.013104
- arXiv:
- arXiv:1310.6821
- Bibcode:
- 2014JPSCP...1a3104S
- Keywords:
-
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 4 pages, 4 figures, accepted for proceedings of The 12th Asia Pacific Physics Conference of AAPPS