! File: 2524C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:07:38:07 coverpage: title_1: SPECTROPOLARIMETRY OF BRIGHT QUASARS sci_cat: QUASARS & AGN sci_subcat: QUASAR EMISSION proposal_for: GO pi_title: PROF. pi_fname: CHRIS pi_lname: IMPEY pi_inst: ARIZONA, UNIVERSITY OF pi_country: USA pi_phone: (602)-621-6522 keywords_1: QUASAR, CONTINUUM, RADIATION hours_pri: 10.50 num_pri: 1 fos: X funds_amount: 78441 funds_length: 12 funds_date: SEP-91 pi_position: ASSOCIATE PROFESSOR off_fname: MICHAEL off_lname: CUSANOVICH off_title: V.PRES.RES off_inst: UNIVERSITY OF ARIZONA off_addr_1: ADMINISTRATION 601 off_addr_2: UNIVERSITY OF ARIZONA off_addr_3: TUCSON 85721 off_city: TUCSON off_state: AR. off_zip: 85721 off_country: USA off_phone: (602)-621-3513 off_telex: 467175 ! end of coverpage abstract: line_1: We request 10.5 hours with the FOS to obtain the first ultraviolet line_2: polarimetry of the five bright quasars. They have been specifically selected line_3: from a large optical polarimetric survey; their measured U,B,V,R and I colors line_4: and polarizations indicate the absence of contaminating starlight,dust or line_5: blazar components. These observations will be combined with quasi-simultaneous line_6: ground based polarimetry and spectrophotometry, to double the spectral coverage line_7: into the critical UV region. These data will be analyzed with multiwavelength line_8: fitting techniques. Several emission mechanisms contribute to the optical- line_9: ultraviolet continuum in quasars, including a power law of slope line_10: ~ 1(S_v proportional to v -1), an optically thick thermal component which peaks line_11: in the ultraviolet, and occasionally a highly polarized and variable synchroton line_12: power law. The combined UV and optical spectropolarimetry will determine, for line_13: the first time, the polarization of these individual components, including that line_14: of the strong ultraviolet excess. We will check to see if the observed line_15: polarization can be fully explained by a synchrotron component or external line_16: scatterers (electrons or dust). If, however, the observed rise of polarization line_17: into the blue is attributable to an accretion disk with an electron scattering line_18: atmosphere, we will infer its optical thickness, shape and orientation. Thus line_19: HST spectropolarimetry provides a unique test of the physical emission line_20: mechanisms which produce the energy of quasars. ! ! end of abstract general_form_proposers: lname: IMPEY fname: CHRIS title: P.I. inst: ARIZONA, UNIVERSITY OF country: USA ! lname: MALKAN fname: MATTHEW mi: A. inst: CALIFORNIA, UNIVERSITY OF, LOS ANGELES country: USA ! ! end of general_form_proposers block ! No records found general_form_address: lname: IMPEY fname: CHRIS title: PROF. category: PI inst: UNIVERSITY OF ARIZONA addr_1: STEWARD OBSERVATORY city: TUCSON state: AZ zip: 85721 country: USA ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: PG1222+228 name_2: TON1530 descr_1: GALAXY; QUASAR pos_1: RA=12H 25M 27.393S+/-0.010", pos_2: DEC=+22D 35' 13.08"+/-0.10", pos_3: PLATE-ID = 01TD equinox: 2000 rv_or_z: Z=2.046 comment_1: BRIGHT QUASAR, comment_2: FOS SPECTROPOLARIMETRY fluxnum_1: 1 fluxval_1: V=15.5+/-0.1 fluxnum_2: 2 fluxval_2: F-CONT(3000)=23+/-3E-17 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: PG1222+228 config: FOS/BL opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 1.3S s_to_n: 17 fluxnum_1: 2 priority: 1 req_1: CYCLE 1 / 1.0-20.0; ONBOARD ACQ FOR 2-9 comment_1: BRIGHT QUASARS, FOS comment_2: SPECTROPOLARIMETRY ! linenum: 2.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 3.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 4.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 5.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 6.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 7.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 8.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 9.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 9.500 targname: PG1222+228 config: FOS/BL opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 1.3S s_to_n: 17 fluxnum_1: 2 priority: 1 req_1: CYCLE 1 / 1.0-20.0; ONBOARD ACQ FOR req_2: 10-17 comment_1: BRIGHT QUASARS, FOS comment_2: SPECTROPOLARIMETRY ! linenum: 10.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 11.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 12.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 13.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 14.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 15.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 16.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 17.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 17.500 targname: PG1222+228 config: FOS/BL opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 1.3S s_to_n: 17 fluxnum_1: 2 priority: 1 req_1: CYCLE 1 / 1.0-20.0; ONBOARD ACQ FOR req_2: 18-20 comment_1: BRIGHT QUASARS, FOS comment_2: SPECTROPOLARIMETRY ! linenum: 18.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 19.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G270H wavelength: 2230-3300 num_exp: 1 time_per_exp: 24M s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! linenum: 20.000 targname: PG1222+228 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H wavelength: 1600-2300 num_exp: 1 time_per_exp: 24M s_to_n: 30 fluxnum_1: 2 priority: 1 param_1: POLSCAN=8B ! ! end of exposure logsheet ! No scan data records found