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First Results from the PanRadio Gamma-Ray Burst Collaboration: The 400-day Afterglow of GRB 230815A

  • Authors: James K. Leung, Gemma E. Anderson, Alexander J. van der Horst, Claire Morley, Benjamin Schneider, Fabio De Colle, Om Sharan Salafia, Giancarlo Ghirlanda, Sarah I. Chastain, Adelle J. Goodwin, Ashna Gulati, Lauren Rhodes, Stuart D. Ryder, Ashley A. Chrimes, Valerio D'Elia, Mathieu de Bony de Lavergne, Massimiliano De Pasquale, Antonio de Ugarte Postigo, Dieter H. Hartmann, Benjamin P. Gompertz, Andrew J. Levan, Tara Murphy, Gavin P. Rowell, Thomas D. Russell, Fabian Schüssler, Rhaana L. C. Starling, Nial R. Tanvir, Susanna D. Vergani, Ralph A. M. J. Wijers

James K. Leung et al 2026 The Astrophysical Journal Letters 997 .

  • Provider: AAS Journals

Caption: Figure A3.

Posterior distributions of the parameters in the smoothly broken power-law model fit to the multifrequency radio light curves, assuming the rise and decay slopes (δ1 and δ2) are independent for each frequency (see Table 4). The dashed vertical lines on the histograms represent the 68% credible intervals of the corresponding marginalized posterior distributions. To help with readability, the parameters from left to right are: Speak,5.5 GHz, tb,5.5 GHz, Speak,9 GHz, tb,9 GHz, Speak,16.7 GHz, tb,16.7 GHz, Speak,21.2 GHz, tb,21.2 GHz, δ1,5.5 GHz, δ2,5.5 GHz, δ1,9 GHz, δ2,9 GHz, δ1,16.7 GHz, δ2,16.7 GHz, δ1,21.2 GHz, and δ2,21.2 GHz.

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