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We demonstrate that gamma-ray burst afterglow spectra and light curves can becalculated for arbitrary explosion and radiation parameters by scaling the peakflux and the critical frequencies connecting different spectral regimes. Onlyone baseline calculation needs to be done for each jet opening angle andobserver angle. These calculations are done numerically using high-resolutionrelativistic hydrodynamical afterglow blast wave simulations which include thetwo-dimensional dynamical features of expanding and decelerating afterglowblast waves. Any light curve can then be generated by applying scalingrelations to the baseline calculations.  As a result, it is now possible to fully fit for the shape of the jet break,e.g. at early time X-ray and optical frequencies. In addition, late-time radiocalorimetry can be improved since the general shape of the transition into theSedov-Taylor regime is now known for arbitrary explosion parameters so theexact moment when the Sedov-Taylor asymptote is reached in the light curve isno longer relevant.  When calculating the baselines, we find that the synchrotron criticalfrequency and the cooling break frequency are strongly affected by the jetbreak. The synchrotron break temporal slope quickly drops to the steep latetime Sedov-Taylor slope, while the cooling break first steepens then rises tomeet the level of its shallow late time asymptote.

Gamma-ray burst afterglow scaling relations for the full blast wave evolution