Göğüş, E. and Cusumano, G. and Levan, A. J. and Kouveliotou, C. and Sakamoto, T. and Barthelmy, S. D. and Campana, S. and Kaneko, Y. and Stappers, B. W. and de Ugarte Postigo, A. and Strohmayer, T. and Palmer, D. M. and Gelbord, J. and Burrows, D. N. and van der Horst, A. J. and Muñoz-Darias, T. and Gehrels, N. and Hessels, J. W. T. and Kamble, A. P. and Wachter, S. and Wiersema, K. and Wijers, R. A. M. J. and Woods, P. M. (2010) Discovery of a New Soft Gamma Repeater, SGR J1833–0832. Astrophysical Journal, 718 (1). pp. 331-339. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20100818-090054285
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On 2010 March 19, the Swift/Burst Alert Telescope triggered on a short burst with temporal and spectral characteristics similar to those of soft gamma repeater (SGR) bursts. The source location, however, did not coincide with any known SGR. Subsequent observations of the source error box with the Swift/X-Ray Telescope and the Rossi X-ray Timing Explorer led to the discovery of a new X-ray source with a spin period of 7.56 s, confirming SGR J1833–0832 as a new magnetar. Based on our detailed temporal and spectral analyses, we show that the new SGR is rapidly spinning down (4 × 10^(–12) s s^(–1)) and find an inferred dipole magnetic field of 1.8 × 10^(14) G. We also show that the X-ray flux of SGR J1833–0832 remained constant for approximately 20 days following the burst and then started to decline. We derived an accurate location of the source with the Chandra X-ray Observatory and we searched for a counterpart in deep optical and infrared observations of SGR J1833–0832, and for radio pulsed emission with the Westerbork Radio Synthesis Telescope. Finally, we compare the spectral and temporal properties of the source to other magnetar candidates.
|Additional Information:||© 2010 The American Astronomical Society. Received 2010 May 2; accepted 2010 May 17; published 2010 June 30. E.G. and Y.K. acknowledge EU FP6 Transfer of Knowledge Project “Astrophysics of Neutron Stars” (MTKD-CT-2006- 042722). J.G. and D.N.B. acknowledge support from NASA contract NAS5-00136. A.J.v.d.H. was supported by an appointment to the NASA Postdoctoral Program at the MSFC, administered by Oak Ridge Associated Universities through a contract with NASA. C.K. acknowledges support by NASA grant NNH07ZDA001-GLAST. Partly based on observations made with the Gran Telescopio Canarias (GTC), installed in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias, in the island of La Palma. The WSRT is operated by ASTRON (Netherlands Institute for Radio Astronomy) with support from the Netherlands foundation for Scientific Research. Partly based on observations made with ESO Telescopes at the La Silla or Paranal Observatories under program ID 084.D-0621.|
|Subject Keywords:||pulsars: individual (SGR J1833-0832); X- rays: bursts|
|Classification Code:||PACS: 98.70.Rz; 95.85.Pw; 98.70.Qy; 97.60.Jd; 97.60.Gb; 95.85.Nv|
|Official Citation:||E. Göğüş et al 2010 ApJ 718 331 doi: 10.1088/0004-637X/718/1/331|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||18 Aug 2010 16:41|
|Last Modified:||26 Dec 2012 12:19|
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