RXTE observations of the Low/Hard State X-ray Outburst of the new x-ray transient SWIFT J1753.5-0127

Abstract

We present the results of the analysis of RXTE (Rossi X-ray Timing Explorer) observations of the new x-ray transient, SWIFT J1753.5-0127 during its outburst in July, 2005. The source was caught at the peak of the burst with a flux of 7.19e-09 ergs-s${}^{-1}$-cm${}^{-2}$ in the 3-25 keV energy range and observed until it decreased by about a factor of 10. The photon index of the power law component, which is dominant during the entire outburst, decreases from $\sim$1.76 to 1.6. However, towards the end of the observations the photon index is found to increase, indicating a softening of the spectra. The presence of an ultrasoft thermal component, during the bright phases of the burst, is clear from the fits to the data. The temperature associated with this thermal component is 0.4 keV. We believe that this thermal component could be due to the presence of an accretion disk. Assuming a distance of 8.5 kpc, $L_X/L_{Edd}\simeq 0.05$ at the peak of the burst, for a black hole of mass $10{\mathrm{M}}_{\odot }$. The source is found to be locked in the low/hard state during the entire outburst and likely falls in the category of the x-ray transients that are observed in the low/hard state throughout the outburst. We discuss the physical scenario of the low/hard state outburst for this source.

arXiv commentAccepted for publication in MNRAS; some sections are added as per referee's suggestions; 7 figures and 8 pages

References in corpus (15)

• X-ray Properties of Black-Hole Binaries
• Advection-Dominated Accretion and the Spectral States of Black Hole X-Ray Binaries: Application to Nova Muscae 1991
• The disc instability model of dwarf-novae and low-mass X-ray binary transients
• First Results from the All-Sky Monitor on the Rossi X-ray Timing Explorer
• The Properties of X-Ray and Optical Light Curves of X-Ray Novae
• Spectral Index and Quasi-Periodic Oscillation Frequency Correlation in Black Hole (BH) Sources: Observational Evidence of Two Phases and Phase Transition in BHs
• A Prominent Accretion Disk in the Low-Hard State of the Black Hole Candidate SWIFT J1753.5-0127
• How Do Z and Atoll X-ray Binaries Differ?
• "Soft X-ray transient" outbursts which aren't soft
• The Global-Normal Disk Oscillations and the Persistent Low Frequency QPO in X-ray Binaries
• XTE J1550-564: INTEGRAL Observations of a Failed Outburst
• A Low/Hard State Outburst of XTE J1550-564
• Disk Diffusion Propagation Model for the Outburst of XTE J1118+480
• Rxte Observations of a New X-Ray Transient: GRS 1737-31
• Hard X-ray variability of the black-hole candidate GRO J0422+32 during its 1992 outburst

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