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Pulse Peak Migration during the Outburst Decay of the Magnetar SGR 1830-0645: Crustal Motion and Magnetospheric Untwisting

  • Authors: George Younes, Samuel K Lander, Matthew G. Baring, Teruaki Enoto, Chryssa Kouveliotou, Zorawar Wadiasingh, Wynn C.G. Ho, Alice K. Harding, Zaven Arzoumanian, Keith Gendreau, Tolga Güver, Chin-Ping Hu, Christian Malacaria, Paul S. Ray, and Tod E. Strohmayer

2022 The Astrophysical Journal Letters 924 L27.

  • Provider: AAS Journals

Caption: Figure 3.

Sample dynamic spectral profiles of SGR 1830−0645 derived by fitting 50 phase bins with an absorbed double-blackbody model. Panel tetrads show the integrated fluxes (upper panels) and the νFν photon flux contours in the phase-energy diagram (lower panels) for the warm BB (left) and hot BB (right) spectral components. The time interval for each is noted in the upper-right corner as days from outburst onset. The vertical lines indicate the best-fit Gaussian centroids to the count pulse peaks for each interval. The last row is for two intervals during the post-Sun-constrained period. The analysis is performed for 20 phase bins to increase S/N. See text for more details.

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