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Evidence for quiescent synchrotron emission in the black hole X-ray transient Swift J1357.2–0933
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Gómez, José L., Shahbaz, T., Russell, D. M., Zurita, C., Casares, J., Corral-Santana, J. M., Dhillon, V. S. and Marsh, Tom (2013) Evidence for quiescent synchrotron emission in the black hole X-ray transient Swift J1357.2–0933. In: Innermost Regions of Relativistic Jets and Their Magnetic Fields, Granada, Spain, June 10–14, 2013. Published in: EPJ Web of Conferences, 61 doi:10.1051/epjconf/20136103007 ISSN 2100-014X.
An open access version can be found in:
Official URL: http://dx.doi.org/10.1051/epjconf/20136103007
Abstract
We present high time-resolution optical and infrared observations of the edge-on black hole X-ray transient Swift J1357.2-0933. Our data taken in 2012 shows the system to be at its pre-outburst magnitude and so the system is in quiescence. In contrast to other X-ray transients, the quiescent light curves of Swift J1357.2-0933 do not show the secondary star’s ellipsoidal modulation. The optical and infrared light curves is dominated by variability with an optical fractional rms of about 20 per cent, much larger than what is observed in other systems. The quiescent ultraviolet to mid-IR spectral energy distribution in quiescence is dominated by a nonthermal component with a power–law index of −1.4, (the broad-band rms SED has a similar index) which arises from optically thin synchrotron emission from a jet; the lack of a peak in the spectral energy distribution rules out advection-dominated models (based on [19]).
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | EPJ Web of Conferences | ||||
| Publisher: | EPJ | ||||
| ISSN: | 2100-014X | ||||
| Official Date: | 9 December 2013 | ||||
| Dates: |
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| Volume: | 61 | ||||
| Article Number: | 03007 | ||||
| DOI: | 10.1051/epjconf/20136103007 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | Innermost Regions of Relativistic Jets and Their Magnetic Fields | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Granada, Spain | ||||
| Date(s) of Event: | June 10–14, 2013 | ||||
| Open Access Version: |
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