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SWIFT J1753.5-0127 : a surprising optical/X-ray cross-correlation function

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Durant, M., Gandhi, P., Shahbaz, Tariq, Fabian, A. C., Miller, J., Dhillon, V. S. and Marsh, T. R.. (2008) SWIFT J1753.5-0127 : a surprising optical/X-ray cross-correlation function. Astrophysical Journal Letters, Volume 682 (Number 1). L45-L48. ISSN 2041-8205

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Official URL: http://iopscience.iop.org/1538-4357/682/1/L45/

Abstract

We have conducted simultaneous optical and X-ray observations of SWIFT J1753.5-0127 with RXTE and ULTRACAM, while the system persisted in its relatively bright low/hard state. In the cross-correlation function, we find that the optical emission, with a broad negative peak, leads the X-ray emission by a few seconds and has a smaller positive peak at positive lags. This is markedly different from what was seen for the similarly interesting system XTE J1118+480, and it is the first time that such a correlation function has been so clearly measured. We suggest a physical scenario for its origin.

Item Type:

Journal Article

Subjects:

Q Science > QB Astronomy

Divisions:

Faculty of Science > Physics

Library of Congress Subject Headings (LCSH):

Double stars -- Spectra, X-ray spectroscopy, Emission spectroscopy

Journal or Publication Title:

Astrophysical Journal Letters

Publisher:

IOP Publishing Ltd

ISSN:

2041-8205

Official Date:

20 July 2008

Dates:

Date	Event
20 July 2008	Published

Volume:

Volume 682

Number:

Number 1

Number of Pages:

Page Range:

L45-L48

Identifier:

10.1086/590906

Status:

Peer Reviewed

Publication Status:

Published

Access rights to Published version:

Open Access

Funder:

Spain. Ministerio de Ciencia e Innovación (MICINN), Nihon Gakujutsu Shinkōkai [Japan Society for the Promotion of Science] (NGS), Science and Technology Facilities Council (Great Britain) (STFC), Spain. Ministerio de Educación y Ciencia (MEC)

Grant number:

CSD2006-00070 (MEC)

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