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.
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High luminosities above 10^44 erg/s and compact radii below 10^14 cm suppress H and He lines via high ionization and temperature, with non-homologous compact outflows needed for persistent featurelessness in LFBOTs and TDEs.
TESS and ZTF observations of 12 LFBOTs yield no late-time flares after SSO attribution, constraining central engine lifetimes to hundreds of days or less.
citing papers explorer
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GRB 210704A: A Luminous Fast Blue Transient in a GRB Afterglow at $z = 2.34$
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.
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The Emission and Suppression of Line Features in Luminous Transients
High luminosities above 10^44 erg/s and compact radii below 10^14 cm suppress H and He lines via high ionization and temperature, with non-homologous compact outflows needed for persistent featurelessness in LFBOTs and TDEs.
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Constraints on Late-Time Flaring from Luminous Fast Blue Optical Transients using the Transiting Exoplanet Survey Satellite and the Zwicky Transient Facility
TESS and ZTF observations of 12 LFBOTs yield no late-time flares after SSO attribution, constraining central engine lifetimes to hundreds of days or less.