The Hard Truth about Some "Soft" X-ray Transients
Abstract
We have accumulated multiwavelength lightcurves for eight black hole X-ray binaries which have been observed to enter a supposed ``soft X-ray transient'' outburst, but which in fact remained in the low/hard state throughout the outburst. Comparison of the lightcurve morphologies, spectral behaviour, properties of the QPOs and the radio jet provides the first study of such objects as a subclass of X-ray transients (XRTs). However, rather than assuming that these hard state XRTs are different from ``canonical'' soft XRTs, we prefer to consider the possibility that a new analysis of both soft and hard state XRTs in a spectral context will provide a model capable of explaining the outburst mechanisms for the majority of black hole X-ray binaries.
Cite
@article{arxiv.astro-ph/0207386,
title = {The Hard Truth about Some "Soft" X-ray Transients},
author = {R. M. Bandyopadhyay and C. Brocksopp and R. P. Fender},
journal= {arXiv preprint arXiv:astro-ph/0207386},
year = {2007}
}
Comments
3 pages, 2 figures; to appear in the Proceedings of the 4th Microquasar Workshop, 2002, eds. Durouchoux, Fuchs & Rodriguez, published by the Center for Space Physics: Kolkata