On UT 2001 September 14-18, we used the MOSAIC II imager on the CTIO 4m Blanco telescope to obtain deep U-band observations of the CDF-S/GOODS field. ... Here we decribe the observations and the data processing, and make available the initial, version 0.5 ("best effort") release of the reduced image. ... Visual comparison of image quality between CTIO and EIS U-band imaging data of the CDF-S . ... The EIS CDF-S U-band images have comparable sensitivity to the CTIO data, but with better image quality. ...

ST-ECF Instrument Science Report ACS-2006-02 Wavelength and Flux calibration of the ACS/SBC PR110L and PR130L prisms S. S. Larsen, February 2006 ABSTRACT Wavelength- and flux calibrations are presented for the ACS/SBC PR110L and PR130L slitless spectroscopy modes. ... Wavelength. ... Flux calibration Figure 5: Comparison of sensitivity functions for the SBC prisms derived from the inorbit calibration (solid curves) and the ground calibration from Bohlin et al. 2000 (dashed curves). ...

... 70 · Winter 2007 www.astrosociety.org/uitc © 2007, Astronomical Society of the Pacific 390 Ashton Avenue, San Francisco, CA 94112 Hubble Observations of Ceres and Pluto: A Closer Look at the "Ugly Ducklings" of the Solar System by Max Mutchler Space Telescope Science Institute Introduction regret that my 4th Grade teacher, Mrs. Hadley, doesn't know that she provided me with the very first astronomy book that I ever read, because it had a profound impact on me. ... Planet count 7 6 7 11 12 13 8 9 9? ...