Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5128 Report Date: 18-Jul-95:16:59 Version: ********** Check-in Date: ********** 1.Proposal Title: SEARCH FOR PRIMEVAL GALAXIES (FOS 25): CYCLE 4 EARLY-ACQ IMAGING ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID GALAXIES & CLUSTERS GTO/FOS 1045 Sub Category DISTANT GALAXIES ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Arthur F. Davidsen JOHNS HOPKINS UNIVERSITY USA 410-516-7370 ------------------------------------------------------------------------------------ 7. Abstract The purpose of this program is to locate and obtain spectra of several primeval galaxies (i.e., galaxies at very high redshifts). The method employed is to obtain deep WF/PC exposures of the regions near known high redshift quasars and search for faint, extended objects, including anything associated with the quasars themselves. Out of the three WF/PC fields, the three brightest extended objects will be chosen for follow-up with the FOS. Depending on the magnitudes of the objects, long integrations with G650L or the prism will be used to compare the spectral energy distributions of the primeval galaxies to lower redshift objects to study the evolution of galaxies. ------------------------------------------------------------------------------------ 8. Scientific Key Words: HIGH REDSHIFT QUASARS, GALAXIES-EVOLUTION ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 6.41 par: 0 10. Num targs pri: 3 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5128 PI: Arthur F. Davidsen Proposal Title: SEARCH FOR PRIMEVAL GALAXIES (FOS 25): CYCLE 4 EARLY-ACQ IMAGING ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Edward Beaver UC, SAN DIEGO USA E. Margaret Burbidge UC, SAN DIEGO USA Frank Bartko APPLIED RESEARCH CORP. USA Bruce Margon WASHINGTON, UNIVERSITY OF USA J. Roger P. Angel ARIZONA, UNIVERSITY OF USA Arthur F. Davidsen JOHNS HOPKINS UNIVERSITY USA Richard J. Harms APPLIED RESEARCH CORPORATION USA Ralph Bohlin SPACE TELESCOPE SCIENCE USA INSTITUTE Holland C. Ford SPACE TELESCOPE SCIENCE USA INSTITUTE ------------------------------------------------------------------------------------ 3. Description of proposed observations. WFPC2 exposures with the F606W filter of ~7.9 ks duration are requested for three of the highest redshift quasars known. These images will be searched for signs of extended emission which may either be associated with the quasar itself or with neighboring galaxies. Because the region in the immediate vicinity of the quasar is of interest, the Baum spot will not be used. With the wide filter, the roughly 18th magnitude quasars will saturate during the long exposures and bleed down a column or two on the CCD. This is preferable to losing the entire region immediately adjacent to the quasar. Assuming that at least several extended objects are found, the three brightest candidates will be observed with FOS, using either G650L (if V