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As part of the Hubble Deep Field South program, a set of shorter 2-orbitobservations were obtained of the area adjacent to the deep fields. The WFPC2flanking fields cover a contiguous solid angle of 48 square arcminutes.Parallel observations with the STIS and NICMOS instruments produce a patchworkof additional fields with optical and near-infrared (1.6 micron) response.Deeper parallel exposures with WFPC2 and NICMOS were obtained when STISobserved the NICMOS deep field. These deeper fields are offset from the rest,and an extended low surface brightness object is visible in the deeper WFPC2flanking field. In this data paper, which serves as an archival record of theproject, we discuss the observations and data reduction, and present SExtractorsource catalogs and number counts derived from the data. Number counts arebroadly consistent with previous surveys from both ground and space. Amongother things, these flanking field observations are useful for defining slitmasks for spectroscopic follow-up over a wider area around the deep fields, forstudying large-scale structure that extends beyond the deep fields, for futuresupernova searches, and for number counts and morphological studies, but theirultimate utility will be defined by the astronomical community.

The Hubble Deep Field South Flanking Fields