Other
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20717007l&link_type=abstract
American Astronomical Society Meeting 207, #170.07; Bulletin of the American Astronomical Society, Vol. 37, p.1428
Other
Scientific paper
The original HST/ACS UDF was a program designed to probe the early epochs of galaxy formation, and comprised the deepest optical image ever taken of the universe. Situated in the center of a well-studied area (the Chandra Deep Field-South, GOODS-S, GEMS, and a number of ground-based surveys), in addition to the primary observations taken with the HST Advanced Camera for Surveys (ACS), the NICMOS Ultra-Deep Field (Thompson et al.) overlies it. The ACS UDF also included more parallel HST observations in NICMOS, WFCP2, and STIS. The NICMOS and WFPC2 parallel images taken in parallel to ACS were also the deepest IR and UV images ever taken. ACS observations in parallel with the NICMOS UDF and NICMOS observations in parallel to ACS grism surveys on the UDF (e.g. the GRAPES program) and other NICMOS GO pure parallels also add to the total of surrounding area imaged in multiple optical and IR bandpasses. As such, it is prime territory for exploring problems such as, for example, the luminosity function of galaxy populations at the early epochs of galaxy formation, at the end of the era of reionization. We have been granted further HST observations in NICMOS and ACS to go deeper in IR in the original UDF and to yield useful depth in optical passbands in ACS on the original UDF deep NICMOS parallel fields. We will present these observations in more detail.
Beckwith Steve V. W.
Bergeron Louis E.
Carollo Marcella C.
Ferguson Henry C.
Gardner Jeffrey P.
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