The 2009 outburst from the new X-ray transient and black-hole candidate XTE J1652-453
Abstract
We analyse the Rossi X-ray Timing Explorer (RXTE) and Swift observations of the 2009 outburst from a newly discovered transient and black hole candidate XTE J1652-453. The behaviour of the source was observed by RXTE to be a sequence of spectral states that are typical of black-hole X-ray binaries. During the first seven observations, it is determined that the source remains in a high/soft state. This is determined from the spectrum that is dominated by a soft thermal component, which contributes an average of ∼85 per cent to the X-ray flux at 2-20 keV, and from the hardness ∼0.1 showing up in the hardness-intensity diagram. For the last 20 observations, the spectral state is classified as low/hard, according to an average hardness of ∼0.8 and a balance between the thermal and the non-thermal components; a power-law component takes ≥80 per cent of the total 2-20 keV flux. Located in between is an intermediate state that the source might have experienced. The usual relationship between the rms and hardness is also present in the hardness-rms diagram. Throughout the outburst, no quasi-periodic oscillations are found in XTE J1652-453.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 2011
- DOI:
- 10.1111/j.1365-2966.2011.18197.x
- arXiv:
- arXiv:1101.4346
- Bibcode:
- 2011MNRAS.413.1072H
- Keywords:
-
- accretion;
- accretion discs;
- black hole physics;
- stars: evolution;
- stars: individual: XTE J1652-453;
- X-rays: binaries;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 8 pages, 5 figures