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NICER Observes the Effects of an X-Ray Burst on the Accretion Environment in Aql X-1

  • Authors: L. Keek, Z. Arzoumanian, P. Bult, E. M. Cackett, D. Chakrabarty, J. Chenevez, A. C. Fabian, K. C. Gendreau, S. Guillot, T. Güver, J. Homan, G. K. Jaisawal, F. K. Lamb, R. M. Ludlam, S. Mahmoodifar, C. B. Markwardt, J. M. Miller, G. Prigozhin, Y. Soong, T. E. Strohmayer, and M. T. Wolff

2018 The Astrophysical Journal Letters 855 L4.

  • Provider: AAS Journals

Caption: Figure 3.

Spectral fits to burst peak (top panels; solid line is the best-fit model and dashed line illustrates one model component) and the fit residuals with the goodness of fit, ﹩{\chi }_{\nu }^{2}﹩ (bottom panels). Left: the commonly used spectral model with a blackbody and fixed pre-burst spectrum leaves a substantial soft excess. Middle: an increase in the normalization of the pre-burst component fits the excess. Right: alternatively, a disk reflection component produces a similar improvement.

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