Long-term X-ray Variability of Circinus X-1

Details Long-term X-ray Variability of Circinus X-1 Long-term X-ray Variability of Circinus X-1

2003-03-18

arxiv.org/abs/astro-ph/0303402v1

Astrophys.J. 595 (2003) 333-341

Astronomy and Astrophysics

Astrophysics

19 pages, 8 figures, Latex

Scientific paper

10.1086/377193

We present an analysis of long term X-ray monitoring observations of Circinus X-1 (Cir X-1) made with four different instruments: Vela 5B, Ariel V ASM, Ginga ASM, and RXTE ASM, over the course of more than 30 years. We use Lomb-Scargle periodograms to search for the ~16.5 day orbital period of Cir X-1 in each of these data sets and from this derive a new orbital ephemeris based solely on X-ray measurements, which we compare to the previous ephemerides obtained from radio observations. We also use the Phase Dispersion Minimization (PDM) technique, as well as FFT analysis, to verify the periods obtained from periodograms. we obtain dynamic periodograms (both Lomb-Scargle and PDM) of Cir X-1 during the RXTE era, showing the period evolution of Cir X-1, and also displaying some unexplained discrete jumps in the location of the peak power.

Affiliated with

Also associated with

No associations

Rating

Long-term X-ray Variability of Circinus X-1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Long-term X-ray Variability of Circinus X-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long-term X-ray Variability of Circinus X-1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-119022