! File: 4577C.PROP ! Database: PEPDB ! Date: 22-FEB-1994:18:23:40 coverpage: title_1: MORPHOLOGIES OF DISTANT RADIO GALAXIES - CYCLE 3 SUPPLEMENTAL sci_cat: QUASARS & AGN proposal_for: GO pi_fname: GEORGE pi_lname: MILEY pi_inst: LEIDEN OBSERVATORY pi_country: NETHERLANDS pi_phone: 011-(31)-71-275849 keywords_1: RADIO GALAXIES hours_pri: 10.00 num_pri: 2 wf_pc: X ! end of coverpage abstract: line_1: Some of us carried out a pilot project in Cycle 1 to observe two line_2: distant galaxies known, 4C 41.17 at z = 3.8 and 4C 28.58 at z = 2.9. line_3: These redshifts correspond to relative lookback times of between 80% line_4: must be close to the epoch at which the galaxies formed. The pilot line_5: project was successful. The ultraviolet continua of galaxies were well line_6: detected and exhibit clumpiness on a scale of hundred parsec. The line_7: morphologies help constrain models of the radio/optical alignment line_8: effect observed in distant radio galaxies indicate that the optical line_9: structure has scales that are ideally to mapping with the HST. There line_10: are several important differences between the the two detected line_11: objects. Here we propose expanding our sample by imaging 2 additional line_12: galaxies to search for trends and relate them to models of the line_13: emission. The observations are also preparatory to a statistical study line_14: of a large sample of distant radio galaxies which we hope to after line_15: refurbishment. This will investigate the continuum and morphologies line_16: and their redshift dependance. It will provide information about (i) line_17: radio galaxy formation and evolution, (ii) environment of the z > 2 line_18: Universe and (iii) cosmological models. ! ! end of abstract general_form_proposers: lname: MILEY fname: GEORGE mi: K. inst: LEIDEN OBSERVATORY country: NETHERLANDS esa: X ! lname: MACCHETTO fname: F. DUCCIO inst: ESA, SPACE TELESCOPE SCIENCE INSTITUTE country: USA esa: X ! lname: VAN BREUGEL fname: WIL inst: LAWRENCE LIVERMORE NATIONAL LAB country: USA ! lname: CHAMBERS fname: KENNETH inst: INSTITUTE FOR ASTRONOMY country: USA ! lname: MCCARTHY fname: PATRICK inst: OBSERVATORIES OF THE CIW country: USA ! lname: ROTTGERING fname: HUUB inst: LEIDEN OBSERVATORY country: NETHERLANDS esa: X ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: We shall take deep images of two z > 2 radio galaxies with the line_2: WFC. The filters are wide-band ones, chosen to maximise the line_3: sensitivity in the continua, while avoiding Lyman alpha. line_5: The targets have similar brightnesses to the targets which we line_6: successfully detected in Cycle 1. Following these previous line_7: observations, we shall observe each galaxy for a total of 12000s, line_8: divided into five separate exposures to satisfy orbital line_9: constraints and allow the effects of cosmic rays to be removed. line_10: The images will provide morphological information on the continuum line_11: in the ultraviolet rest frame. ! question: 4 section: 1 line_1: The HST is needed to image sub-kiloparsec structure in these distant line_2: galaxies. The proposed observations will augment the number of z > 2 line_3: galaxies in our sample from 2 to 4, and give limited information line_4: about the systematics of their morphologies. This should line_5: constrain models of distant radio galaxies. line_7: The exposure times in our revised Cycle 1 proposals gave good signal to line_8: noise. The new targets are comparable in brightness and general line_9: properties. Similar exposure times should be well matched to the line_10: targets and will facilitate comparisons with the Cycle 1 observations. ! question: 7 section: 1 line_1: The HST images will be reduced initially using STSDAS. After optimum line_2: flat-fielding, the effect of cosmic rays and cosmetic imperfections in line_3: the chip will be removed. Deconvolution algorithms (e.g. line_4: Lucy-Richardson) will then be CRITICALLY applied. There are no line_5: stringent requirements on deconvolution. The data are not limited by line_6: dynamic range. line_8: The HST images will be compared with radio morphology data from the line_10: VLA, the Jodrell Bank MERLIN array and the European VLBI Network. Also, line_11: the images will be smoothed and compared photometrically with our line_12: ground-based optical images. ! question: 10 section: 1 line_1: The reduction will take place at the ST ScI and at the various line_2: participating institutions. SDAS/IRAF is running at all of them. line_4: As well as the normal institutional support, GM has a postdoc allocated line_5: to HST research funded jointly by ASTRON and SRON (the Dutch line_6: equivalents of NSF and NASA) and is PI in a large EEC project to study line_7: distant radio galaxies. ! !end of general form text general_form_address: lname: MILEY fname: GEORGE category: PI inst: LEIDEN OBSERVATORY addr_1: POSTBUS 9513 addr_2: NEILSBOHRWEG 2 city: LEIDEN zip: 2300 RA country: NETHERLANDS phone: 011-(31)-71-275849 ! lname: MACCHETTO fname: DUCCIO mi: F. title: DR. category: ADV inst: ESA, SPACE TELESCOPE SCIENCE INSTITUTE addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: 4C40.36 descr_1: E,315 pos_1: RA = 18H 09M 19.424S +/- 0.1S, pos_2: DEC = +40D 44' 38.88" +/- 1" equinox: 1950 pm_or_par: N rv_or_z: Z = 2.27 plate_req: N fluxval_1: R=21.7 ! targnum: 2 name_1: TX0828+193 descr_1: E,315 pos_1: RA = 08H 28M 01.0S +/- 0.1S, pos_2: DEC = +19D 23' 21" +/- 1" equinox: 1950 pm_or_par: NO rv_or_z: Z = 2.57 plate_req: N fluxval_1: R=20.8 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: 4C40.36 config: WFC opmode: IMAGE aperture: WFALL sp_element: F702W num_exp: 6 time_per_exp: 1728S priority: 1 req_1: CYCLE 3/ 1.00-2.00 ! linenum: 2.000 targname: TX0828+193 config: WFC opmode: IMAGE aperture: WFALL sp_element: F702W num_exp: 6 time_per_exp: 2155S priority: 1 ! ! end of exposure logsheet ! No scan data records found