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GRB 221009A: Discovery of an Exceptionally Rare Nearby and Energetic Gamma-Ray Burst

  • Authors: Maia A. Williams, Jamie A. Kennea, S. Dichiara, Kohei Kobayashi, Wataru B. Iwakiri, Andrew P. Beardmore, P. A. Evans, Sebastian Heinz, Amy Lien, S. R. Oates, Hitoshi Negoro, S. Bradley Cenko, Douglas J. K. Buisson, Dieter H. Hartmann, Gaurava K. Jaisawal, N. P. M. Kuin, Stephen Lesage, Kim L. Page, Tyler Parsotan, Dheeraj R. Pasham, B. Sbarufatti, Michael H. Siegel, Satoshi Sugita, George Younes, Elena Ambrosi, Zaven Arzoumanian, M. G. Bernardini, S. Campana, Milvia Capalbi, Regina Caputo, Antonino D'Aì, P. D'Avanzo, V. D'Elia, Massimiliano De Pasquale, R. A. J. Eyles-Ferris, Elizabeth Ferrara, Keith C. Gendreau, Jeffrey D. Gropp, Nobuyuki Kawai, Noel Klingler, Sibasish Laha, A. Melandri, Tatehiro Mihara, Michael Moss, Paul O'Brien, Julian P. Osborne, David M. Palmer, Matteo Perri, Motoko Serino, E. Sonbas, Michael Stamatikos, Rhaana Starling, G. Tagliaferri, Aaron Tohuvavohu, Silvia Zane, Houri Ziaeepour

Maia A. Williams et al 2023 The Astrophysical Journal Letters 946 .

  • Provider: AAS Journals

Caption: Figure 3.

XRT PC-mode 0.8–5.0 keV images from ObsIDs 01126853004 (top left), 01126853006 (top right), 01126853008/09 (bottom left), and 01126853010/11 (bottom right), illustrating the echo expansion with time. The echo event radial positions were scaled by t −0.5 to each observation midtime (given in the upper left corner of each image in days since GBM trigger) to counter the halo expansion within each observation.

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