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Brightening X-Ray Emission from GW170817/GRB 170817A: Further Evidence for an Outflow

  • Authors: John J. Ruan, Melania Nynka, Daryl Haggard, Vicky Kalogera, and Phil Evans

2018 The Astrophysical Journal Letters 853 L4.

  • Provider: AAS Journals

Caption: Figure 3.

Comparison of the radio to X-ray flux densities at 15.6 days (blue points) and 109.2 days post-burst (red points). The X-ray-to-radio spectral index α remains constant at −0.53 over this timespan, indicating that the X-ray emission brightened at the same rate as the radio.

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