In't Zand, J. J. M., Jonker, P. G., Nelemans, G., Steeghs, D. (Danny), 1972- and O'Brien, K.. (2006) Optical identification of IGR J19140+0951. Astronomy and Astrophysics, Vol.448 (No.3). pp. 1101-1106. ISSN 0004-6361

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Abstract

IGR J19140+0951 was discovered by INTEGRAL in 2003 in the 4-100 keV band. Observations with INTEGRAL and RXTE provide a tentative identification as a high-mass X-ray binary (HMXB) with a neutron star as accretor. However, an optical counterpart was thus far not established, nor was the presence of a pulsar which is commonly observed in HMXBs. We observed IGR J19140+0951 with Chandra and find the source to be active at a similar flux as previous measurements. The lightcurve shows a marginally significant oscillation at 6.5 ks which requires confirmation. We determine a sub-arcsecond position from the Chandra data and identify the heavily reddened optical counterpart 2MASS 19140422+0952577 in the 2MASS catalog. Optical follow-up observations with the William Herschel Telescope at La Palma exhibit a continuum spectrum coming out of extinction above 7000 Å without strong absorption or emission features. V, I and band photometry point to an optical counterpart with an extinction of . The extinction is consistent with the interstellar value. None of the data reject the suspicion that IGR J19140+0951 is an HMXB with additional circumstellar obscuration around the accretor.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	X-ray binaries
Journal or Publication Title:	Astronomy and Astrophysics
Publisher:	EDP Sciences
ISSN:	0004-6361
Date:	2006
Volume:	Vol.448
Number:	No.3
Page Range:	pp. 1101-1106
Identification Number:	10.1051/0004-6361:20053411
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO), Smithsonian Astrophysical Observatory
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URI:	http://wrap.warwick.ac.uk/id/eprint/49500

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