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We present results of 2 mm observations of the Crab Nebula, obtained usingthe Goddard-IRAM Superconducting 2 Millimeter Observer (GISMO) bolometer cameraon the IRAM 30 m telescope. Additional 3.3 mm observations with the MUSTANGbolometer array on the Green Bank Telescope are also presented. The integrated2 mm flux density of the Crab Nebula provides no evidence for the emergence ofa second synchrotron component that has been proposed. It is consistent withthe radio power law spectrum, extrapolated up to a break frequency oflog(nu_{b} [GHz]) = 2.84 +/- 0.29 or nu_{b} = 695^{+651}_{-336} GHz. The CrabNebula is well-resolved by the ~16.7" beam (FWHM) of GISMO. Comparison to radiodata at comparable spatial resolution enables us to confirm significant spatialvariation of the spectral index between 21 cm and 2 mm. The main effect is aspectral flattening in the inner region of the Crab Nebula, correlated with thetoroidal structure at the center of the nebula that is prominent in the near-IRthrough X-ray regime.

The Radio - 2 mm Spectral Index of the Crab Nebula Measured with GISMO