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Photometric Variability and Rotation of β Pictoris b from JWST NIRCam Coronagraphic Imaging

  • Authors: Yifan Zhou, Beth A. Biller, Aarynn L. Carter, Marshall D. Perrin, Michael Poon, Genaro Suárez, Ben J. Sutlieff, Johanna M. Vos, Jason J. Wang, William O. Balmer, Marta L. Bryan, Anthony Boccaletti, Julien H. Girard, Eileen C. Gonzales, Jens Kammerer, Jarron M. Leisenring, Paulina. Palma-Bifani, Kevin R. Wagner, Dániel Apai, Mickäel Bonnefoy, Brendan P. Bowler, Kyle Franson, Pengyu Liu, Marcio Meléndez, Stanimir A. Metchev, Simon Petrus, Laurent Pueyo, Isabel Rebollido, Andrew J. Skemer, Xianyu Tan, Niall Whiteford

Yifan Zhou et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 18.

A flash observed by JWST’s guider at the same time as the discontinuity in the time-series data. The main panel shows the median background level in the 8 × 8 “postage stamp” guide exposures. The background spikes sharply at the moment of the PSF change. Insets compare a typical guide star image to the image at the time of the event. The flash morphology is consistent with a micrometeor strike. A comprehensive analysis of such events in FGS and science data will be presented in R. Telfer et al. (2026, in preparation).

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