! File: 2592C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:08:52:15 coverpage: title_1: EMISSION LINE IMAGING OF MODERATE REDSHIFT OBJECTS sci_cat: GALAXIES & CLUSTERS sci_subcat: DISTANT GALAXIES proposal_for: GO pi_title: PROF. pi_fname: D. pi_mi: G. pi_lname: YORK pi_inst: CHICAGO, UNIVERSITY OF pi_country: USA pi_phone: 312-702-8930 keywords_1: GALAXIES, STRUCTURE, GALAXIES, FORMATION, QUASARS, BL keywords_2: LACERTAE OBJECTS hours_pri: 9.94 num_pri: 1 wf_pc: X funds_amount: 61193 funds_length: 12 funds_date: JUL-90 pi_position: PROFESSOR ! end of coverpage abstract: line_1: Using intervening QSO metal absorption line systems as tracers, we have line_2: searched for and found [OII] emission at moderate redshift. The emission is line_3: seen large distances (>100h-1 kpc) from the QSO absorber and possibly indicates line_4: an extended diffuse object. We wish to test this hypothesis with ST by line_5: obtaining Ly-alpha and off-band images using the WFC and available medium width line_6: filters. We will be able to obtain sensitivity limits of S(Ly-apah) > 10-16 line_7: erg cm-2 s-1 arcsec-2 for objects extended over (20 arcsec)2=(100h-1kpc)2 at line_8: z=0.6 corresponding to 3 x 10-3M yr-1kpc-2 (one large Sc galaxy spread over line_9: [100h-1kpc]2). Fully half the age of the universe is represented by line_10: redshifts <1 and recent observational and theoretical work indicates that not line_11: all galaxy formation necessarily occurred at large redshift z>5. We will also line_12: examine the nature of the object less the 1" from the line-of-sight to line_13: AO0235+164 at z=0.525 using ST's high resolution. ! ! end of abstract general_form_proposers: lname: YORK fname: D. title: P.I. mi: G. inst: CHICAGO, UNIVERSITY OF country: USA ! lname: YANNY fname: BRIAN inst: CHICAGO, UNIVERSITY OF country: USA ! ! end of general_form_proposers block ! No records found general_form_address: lname: YORK fname: DONALD mi: G. title: PROF. category: PI inst: UNIVERSITY OF CHICAGO addr_1: 5640 S. ELLIS AVENUE city: CHICAGO state: IL zip: 60637 country: USA ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: QO453-423 descr_1: GALAXY; QSO; descr_2: IMAGING; CONTINUUM; descr_3: EMISSION pos_1: RA=04H 53M 48S +/-1", pos_2: DEC=-42D 2' 8.6"+/-1" equinox: 1950 rv_or_z: Z=0.726 comment_1: SIGNAL TO NOISE IS COMPLICATED comment_2: COMBINATION OF FACTORS INVOLVING comment_3: COMBINATION OF PICTURES. FLUX DATA comment_4: GIVE POINT SOURCE DETECTION LIMITS comment_5: NEEDED TO REACH OUR GOALS. comment_6: SEARCHING FOR LYMAN ALPHA AND comment_7: 3727A EMISSION IN A GAS CLOUD SEEN comment_8: AT Z=0.726 IN ABSORPTION IN THE comment_9: SPECTRUM OF THE QSO 0453-423. fluxnum_1: 1 fluxval_1: F-CONT(1940)=3.0 +/- 1.0 E-18 fluxnum_2: 2 fluxval_2: F-CONT(2840)=1.3 +/- 0.4 E-18 fluxnum_3: 3 fluxval_3: F-CONT(6480)=3.0 +/- 1.0 E-20 fluxnum_4: 4 fluxval_4: F-CONT(6640)=1.0 +/- 0.3 E-18 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: QAELS targname: QO453-423 config: WFC opmode: IMAGE aperture: ALL sp_element: F194W num_exp: 1 time_per_exp: 1600S s_to_n: 3 fluxnum_1: 1 priority: # param_1: CR-SPLIT=NO, param_2: SUM=2X2, param_3: PRE-FLASH=YES ! linenum: 2.000 sequence_1: DEFINE sequence_2: QAELS targname: BIAS config: ^ opmode: ^ aperture: ^ sp_element: F194W num_exp: ^ time_per_exp: 0S s_to_n: ^ priority: # param_1: ^ req_1: CALIB FOR 1 NO SLEW ! linenum: 3.000 sequence_1: ^ targname: QO453-423 config: ^ opmode: ^ aperture: ^ sp_element: F284W num_exp: ^ time_per_exp: 1100S s_to_n: ^ fluxnum_1: 2 priority: # param_1: ^ ! linenum: 4.000 sequence_1: ^ targname: BIAS config: ^ opmode: ^ aperture: ^ sp_element: F284W num_exp: ^ time_per_exp: 0S s_to_n: ^ priority: # param_1: ^ req_1: CALIB FOR 2 NO SLEW ! linenum: 5.000 sequence_1: ^ targname: QO453-423 config: ^ opmode: ^ aperture: ^ sp_element: F648M num_exp: ^ time_per_exp: 1600S s_to_n: ^ fluxnum_1: 3 priority: # param_1: ^ ! linenum: 6.000 sequence_1: ^ targname: BIAS config: ^ opmode: ^ aperture: ^ sp_element: F648M num_exp: ^ time_per_exp: 0S s_to_n: ^ priority: # param_1: ^ req_1: CALIB FOR 3 NO SLEW ! linenum: 7.000 sequence_1: ^ targname: QO453-423 config: ^ opmode: ^ aperture: ^ sp_element: F664N num_exp: ^ time_per_exp: 1600S s_to_n: ^ fluxnum_1: 4 priority: # param_1: ^ ! linenum: 8.000 sequence_1: ^ targname: BIAS config: ^ opmode: ^ aperture: ^ sp_element: F664N num_exp: ^ time_per_exp: 0S s_to_n: ^ priority: # param_1: ^ req_1: CALIB FOR 4 NO SLEW ! linenum: 9.000 sequence_1: USE QAELS priority: 1 ! linenum: 10.000 sequence_1: USE QAELS priority: 2 req_1: POS TARG +20,+20 /1-8 ! linenum: 11.000 sequence_1: USE QAELS priority: 3 req_1: POS TARG +20,-20 /1-8 ! linenum: 12.000 sequence_1: USE QAELS priority: 4 req_1: POS TARG -20,-20 /1-8 ! linenum: 13.000 sequence_1: USE QAELS priority: 5 req_1: POS TARG -20,+20 /1-8 ! ! end of exposure logsheet ! No scan data records found