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X-Ray Observations of the New Unusual Magnetar Swift J1834.9-0846

Kargaltsev, Oleg and Kouveliotou, Chryssa and Pavlov, George G. and Göğüş, Ersin and Lin, Lin and Wachter, Stefanie and Griffith, Roger L. and Kaneko, Yuki and Younes, George (2012) X-Ray Observations of the New Unusual Magnetar Swift J1834.9-0846. Astrophysical Journal, 748 (1). Art. No. 26. ISSN 0004-637X.

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We present X-ray observations of the new transient magnetar Swift J1834.9–0846, discovered with the Swift Burst Alert Telescope on 2011 August 7. The data were obtained with Swift, Rossi X-ray Timing Explorer (RXTE), CXO, and XMM-Newton both before and after the outburst. Timing analysis reveals single peak pulsations with a period of 2.4823 s and an unusually high pulsed fraction, 85% ± 10%. Using the RXTE and CXO data, we estimated the period derivative, Ṗ=8 x 10^(-12) s s^(–1), and confirmed the high magnetic field of the source, B = 1.4 × 10^(14)G. The decay of the persistent X-ray flux, spanning 48 days, is consistent with a power law, F α t^(–0.5). In the CXO/Advanced CCD Imaging Spectrometer image, we find that the highly absorbed point source is surrounded by extended emission, which most likely is a dust scattering halo. Swift J1834.9–0846 is located near the center of the radio supernova remnant W41 and TeV source HESS J1834–087. An association with W41 would imply a source distance of about 4 kpc; however, any relation to the HESS source remains unclear, given the presence of several other candidate counterparts for the latter source in the field. Our search for an IR counterpart of Swift J1834.9–0846 revealed no source down to K_s ~ 19.5 within the 0."6 CXO error circle.

Item Type:Article
Related URLs:
URLURL TypeDescription
Kouveliotou, Chryssa0000-0003-1443-593X
Göğüş, Ersin0000-0002-5274-6790
Kaneko, Yuki0000-0003-2342-0131
Younes, George0000-0002-7991-028X
Additional Information:© 2012 American Astronomical Society. Received 2011 November 1; accepted 2012 January 9; published 2012 March 1. The authors are grateful to Harvey Tananbaum for his decision to award his DDT time for CXO observations of Swift J1834.9−0846. S.W. thanks Davy Kirkpatrick for the use of his Palomar observing time to obtain the near-IR observations of Swift J1834.9−0846. This work was partly based on observations obtained at the Hale Telescope, Palomar Observatory, as a part of a continuing collaboration between the California Institute of Technology, NASA/JPL, and Cornell University. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. The work by O.Y.K. and G.G.P. was partly supported by NASA grants NNX09AC81G and NNX09AC84G, NSF grants AST09-08733 and AST09- 08611, and by the Ministry of Education and Science of the Russian Federation (contract 11.G34.31.0001). C.K. was partly supported by NASA grant NNH07ZDA001-GLAST. L.L. is supported by the Postdoctoral Research Program of the Turkish Academy of Sciences (TÜBA).
Funding AgencyGrant Number
Ministry of Education and Science of the Russian Federation11.G34.31.0001
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK)UNSPECIFIED
Subject Keywords: gamma-ray burst: individual (HESS J1834–087); ISM: individual objects (W41); stars: neutron; X-rays: ISM
Issue or Number:1
Record Number:CaltechAUTHORS:20120418-094841511
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Official Citation: X-Ray Observations of the New Unusual Magnetar Swift J1834.9–0846 Oleg Kargaltsev et al. 2012 ApJ 748 26
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:30155
Deposited By: Ruth Sustaita
Deposited On:18 Apr 2012 17:21
Last Modified:17 Dec 2019 21:18

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