Synphot simulates photometric data and spectra, observed or otherwise. It can incorporate external filters, spectra, and data. One can also use a pre-defined standard star (Vega), bandpass, or extinction law. Furthermore, it allows one to:

* Construct complicated composite spectra using different models. * Simulate observations. * Compute photometric properties such as count rate, effective wavelength, and effective stimulus. * Manipulate a spectrum; e.g., applying redshift or normalize it to a given flux value in a given bandpass. * Sample a spectrum at given wavelengths. * Plot a quick-view of a spectrum. * Perform repetitive operations such as simulating the observations of multiple type of sources through multiple bandpasses.