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The science investigation teams (SITs) for the WFIRST coronagraphicinstrument have begun studying the capabilities of the instrument to directlyimage reflected light off from exoplanets at contrasts down to contrasts of~10^-9 with respect to the stellar flux. Detection of point sources at thesehigh contrasts requires yield estimates and detailed modeling of the image ofthe planetary system as it propagates through the telescope optics. While theSITs might generate custom astrophysical scenes, the integrated model,propagated through the internal speckle field, is typically done at JPL. Inthis white paper, we present a standard file format to ensure a singledistribution system between those who produce the raw astrophysical scenes, andJPL modelers who incorporate those scenes into their optical modeling. At itscore, our custom file format uses FITS files, and incorporates standards onpackaging astrophysical scenes. This includes spectral and astrometricinformation for planetary and stellar point sources, zodiacal light andextragalactic sources that may appear as contaminants. Adhering to such auniform data distribution format is necessary, as it ensures seamless work flowbetween the SITs and modelers at JPL for the goals of understanding limits ofthe WFIRST coronagraphic instrument.

Standard FITS template for simulated astrophysical scenes with the WFIRST coronagraph