{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"205c10be5cb061b7e71fcc67fa730b20442358a03b0f6056448c5c8bf0518f21","created":"2026-10-03T07:17:55Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"0c19b74804641de061fd7819b7d65c1169841564b2210dfec7b2fc891d8ee049","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"astro.grb-engines-jets.prompt-emission","kind":"phenomenon","literature_status":"contested","n":"1","parents":[],"plain":"The first seconds of gamma rays have a spectral shape that neither the glow of hot gas nor electrons spiraling in magnetic fields (synchrotron radiation) reproduces cleanly.","posed_since":"","precise":"Explain the prompt spectra (peak energy $E_p \\sim 100\\,\\mathrm{keV}$ to a few MeV; low-energy photon index $\\alpha \\sim -1$, harder than the fast-cooling synchrotron value $-3/2$, with a sizable fraction of spectra harder than the slow-cooling synchrotron limit $-2/3$) and the $E_p$ versus isotropic energy (Amati) correlation, choosing among synchrotron from internal shocks or reconnection with marginally fast cooling, dissipative photospheres, and Comptonization. Answer: a mechanism and dissipation radius that reproduce spectra, variability and correlations for a large sample.","problem_ref":null,"references":"","settled_by":"Joint fits of time-resolved spectra and polarization of a large burst sample by one mechanism with physically consistent parameters.","status_note":"","title":"What radiation mechanism produces GRB prompt gamma-ray spectra?","topic_ref":"d34ff2cb4f455ed6abcd7339be502ac934cb4f47f2fd2df51ba89febba9c8dd6"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"a3e17d1ff5496dcbf89f34b3b2be2ea11c22c4d47f83403c6a55c1662da98389","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"2810851f6b456f0f38c07eb45cf69c1ed1185ce0a056d83de0bce5dfb7ddc012","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"JJqOanauYny4iRgMIRmzLw7f8uT3K1nReTL2vJ0UA3DFQKa6FAW_rfVIP4-mvkJXLzsXx1nBVN-whkOB2nMYBw"},"schema":"pubphys.envelope/1"},"record_hash":"a3e17d1ff5496dcbf89f34b3b2be2ea11c22c4d47f83403c6a55c1662da98389","leaf_index":549}