2023-08-07, NaI, 48mm × 6in quartz. 207 absolute spectra × 1725 native bins (0.376 nm/px), 545 s.
every wavelength gets its own radiance temperature T_R(λ,t) — the blackbody matching that one bin at ε=1: a unit
conversion, not a claim. scroll to zoom wavelength · drag to pan · double-click resets ·
click the waterfall to jump in time · click the spectrum for a λ / radiance / T_R readout (click again to clear). zoom into 585–595 and scrub: the self-reversal gulf and the D2/D1 horn
inversion, live, at native resolution.
speedt = 0.0 sL = 0 cd/m²440–1010 nm
top: log spectral radiance, bars in true wavelength color; "eye" = photopic composite.
middle: false-color T_R(λ) now (iron, 1000–2600 K). bottom: T_R(λ,t), whole burn, playhead yellow.
ignition ~100 s · record peak 281 s · plateau · smoke-alarm cutoff 545 s.