3D kinetic simulations of pre-merger binary neutron star magnetospheres predict nonthermal gamma-ray signals at ~16 MeV and fast radio burst-like radio transients from reconnecting current sheets.
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The intensity-tracking pattern in GRB prompt spectra divides into three subclasses: aligned peaks (Type I), Ep before flux (Type II, dominant), and Ep after flux (Type III).
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Her X-1 precession implies unpinned crustal superfluid vortices with weak mutual friction persisting for centuries.
A second coherent radio burst spanning 704-4032 MHz with spectral index -2.18, 54% linear and 22% circular polarization, and an orthogonal polarization angle jump was detected from 2XMM J104608.7-594306, showing rare radio activity in sources thought to be radio-quiet.
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GRB 210704A at z=2.34 shows a luminous fast blue transient excess peaking at ~7 days, modeled as refreshed shock emission and linked to LFBOTs alongside a high-Lorentz-factor jet.
Optically thin inverse Compton scattering in GRB fireballs yields a positive E_peak-α correlation with alpha evolving from >+0.5 to <-0.67, proposed as a diagnostic signature for the prompt emission mechanism.
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Multi-wavelength monitoring of nearby SNe Ic-BL adds new constraints on the fraction with relativistic jets comparable to SN 1998bw and flags candidates for choked jets and CSM-driven radio emission.
Long-term multi-band photometry of SN 2019vxm shows initial thick CSM interaction, photosphere decoupling at 80-100 days, long-lasting dust emission, and a possible outer CSM rebrightening, implying a massive progenitor with extreme pre-explosion mass loss.
No coincident GW signals found with long GRBs in O3 run; luminosity distance limits set assuming binary merger powering.
A Python pipeline for robotic GRB optical followup with LCO that responds within 3 minutes and was demonstrated on GRB180720B.
This review summarizes the basic principles of electron transport in inhomogeneous and tangled magnetic fields through gyro-centre trajectories, kinetic instabilities, trapping, and diffusion processes.