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Wideband speckle spectroscopy based on the shift-and-add method.

We propose a method for speckle spectroscopy in which objective prism spectra of astronomical objects are reconstructed from dispersed speckle data by using the shift-and-add method. The method is only applicable at high light levels. Because the shift-and-add method is applicable to white-light speckle images, wideband speckle spectroscopy is feasible. Some laboratory experiments confirm the usefulness of the shift-and-add method for speckle spectroscopy.