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A Precessing, Magnetically Dominated, Structured Jet Powering the Hour-scale Quasiperiodic GRB 250702B

  • Authors: Tao An

Tao An 2025 The Astrophysical Journal Letters 995 .

  • Provider: AAS Journals

Caption: Figure 1.

Geometry of the precessing, magnetically dominated, structured-jet model proposed for GRB 250702B. A misaligned geometrically thick torus/wind collimates the jet and defines the precessing axis. The structured jet consists of a narrow spine (orange color) surrounded by a wider sheath (blue color), with a small kink at (2–4) × 102rg indicating where the jet is forced into precession by the disk wind. The observer’s LOS lies just outside the sheath at a small inclination to the jet axis, enabling lighthouse-like modulation and occasional “missing” pulses. An outer thin disk at r ≳ 250 rg is also indicated.

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