2 HST.UDF ivo://mast.stsci/siap/hst.udf Space Telescope Science Institute Archive STScI 1.0 Archive Branch, STScI archive@stsci.edu Observational astronomy Optical Astronomy The ACS Ultra Deep Field (UDF) is a cycle 12 survey carried out using the Advanced Camera for Surveys (ACS) on HST and taking advantage of the Director's Discretionary time. The UDF consists of a single ultra-deep field (412 orbits in total taken in 4 bands) within the CDF-S GOODS area. It is the deepest image ever obtained with Hubble. This service also includes data from the UDF follow-Up program by PI Massimo Stiavelli and colleagues obtained under HST cycle 14 program 10632 titled Searching for galaxies at z>6.5 in the Hubble Ultra Deep Field (also known as UDF05). http://archive.stsci.edu/prepds/udf/udf_hlsp.html Archive Research 2 http://archive.stsci.edu/siap/search.php?id=udf& GET Pointed 360.0 360.0 360.0 360.0 0 0 0 100 53.22 -27.83 0.3 0.3 HST ACS Optical