X-ray timing and spectral behaviour of the Rapid Burster
Abstract
We present an X-ray fast-timing and spectral analysis of the type II bursts and the persistent emission (PE) of the Rapid Burster observed with the EXOSAT Medium-Energy Instrument. The hardness-intensity and colour-colour diagrams of the Rapid Burster are somewhat different from those of the majority of other low-mass X-ray binaries, which fall into two distinct groups, `atoll' and `Z' sources. The strength and frequencies of quasi-periodic oscillations (QPO) in the bursts and the PE, as well as a strong anticorrelation between QPO frequency and burst peak flux, also distinguish the Rapid Burster from atoll and Z sources. The presence, frequency and strength of QPO in type II bursts are all correlated in some manner with the spectral hardness, as are the strength of QPO and the very low-frequency noise (VLFN) component in the PE.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 1995
- DOI:
- 10.1093/mnras/277.2.523
- arXiv:
- arXiv:astro-ph/9510103
- Bibcode:
- 1995MNRAS.277..523R
- Keywords:
-
- BINARIES: CLOSE;
- STARS: INDIVIDUAL: RAPID BURSTER;
- STARS: VARIABLES: OTHER;
- X-RAYS: BURSTS;
- X-RAYS: STARS;
- Astrophysics
- E-Print:
- 52 pages, including 20 figures, LaTeX