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We have obtained a time series of two-dimensional spectra of H? and Ca II ?8542 for a flare on 2001 March 10. This flare showed an enhanced emission at the continuum near the Ca II 8542 ? line. The continuum contrast is estimated to be 3%-5%. This emission lasted about half a minute, showing a good time correlation with the peak of the microwave radio flux at 7.58 GHz. The flare can be classified as a type I white-light flare. A preliminary analysis shows that a nonthermal electron beam cannot directly produce the continuum emission. Heating in the lower atmosphere resulting from the radiative backwarming may account for the continuum enhancement.

Enhanced Emission at the Infrared Continuum in the Flare of 2001 March 10