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The James Webb Space Telescope (JWST) will observe several stars for longcumulative durations while pursuing exoplanets as primary science targets forboth Guaranteed Time Observations (GTO) and very likely General Observer (GO)programs. Here we argue in favor of an automatic default parallels program toobserve e.g., using the F200W/F277W filters or grism of NIRCAM/NIRISS in orderto find high redshift (z >> 10) galaxies, cool red/brown dwarf-sub-stellarobjects, Solar System objects, and observations of serendipitous planetarytransits. We argue here the need for automated exploratory astrophysicalobservations with unused JWST instruments during these long duration exoplanetobservations. Randomized fields that are observed in parallel mode reduceerrors due to cosmic variance more effectively than single continuous fields ofa typical wedding cake observing strategy (Trenti & Stiavelli 2008). Hence, weargue that the proposed automated survey will explore a unique and richdiscovery space in high redshift Universe, Galactic structure, and SolarSystem. We show that the GTO and highly-probable GO target list of exoplanetscovers the Galactic disk/halo and high redshift Universe, mostly well out ofthe plane of the disk of the Milky Way. Exposure times are of the order of theCEERS GTO medium deep survey in a single filter, comparable to CANDELS in HST'ssurveys and deep fields. The area covered by NIRISS and NIRCam combined couldaccumulate to a half square degree surveyed.

Default Parallels: The Science Potential Of JWST Parallel Observations During TSO Primary Observations