! File: 2144C.PROP ! Database: PEPDB ! Date: 17-FEB-1994:01:39:58 coverpage: title_1: NEAR AND MID ANGLE SCATTERING MEASUREMENT TEST proposal_for: SV/OLT pi_fname: CHRISTOPHER pi_lname: BURROWS pi_inst: ST SCI pi_country: USA pi_phone: (301) 338-4913 num_pri: 1 fos: Y ! end of coverpage abstract: line_1: Test Objective: line_2: Determine the effect of internal HST light scattering. Use spectroscopic line_3: measurements taken within a radius of approximately 25 arc seconds line_4: from a bright (V about 7) target star. line_6: The scattering may be due to dust particles or minute line_7: surface irregularities in the OTA mirror surfaces. line_8: Determine the spectral energy distribution by obtaining low resolution line_9: spectra over a wide range of wavelengths. Also determine the radial line_10: dependence of the scattered light measurements. Derive the possible line_11: impact on HST observations. ! ! end of abstract general_form_proposers: lname: BURROWS fname: CHRISTOPHER title: PI inst: ST SCI country: USA esa: Y ! lname: STOCKMAN fname: PETER inst: ST SCI country: USA ! lname: LUPIE fname: OLIVIA inst: ST SCI country: USA ! lname: SCHROEDER fname: DAN inst: BELOIT COLLEGE country: USA ! lname: FASTIE fname: BILL inst: JOHNS HOPKINS UNIVERSITY country: USA ! lname: DOWNES fname: RON inst: APPLIED RESEARCH CORPORATION country: USA ! lname: GRIFFITHS fname: RICHARD inst: ST SCI country: USA ! ! end of general_form_proposers block general_form_text: question: 2 section: 1 line_1: Test Description: line_2: Determine the effect of internal HST light scattering. Use spectroscopic line_3: measurements taken within a radius of approximately 25 arc seconds line_4: from a bright (V about 7) target star. line_6: The scattering may be due to dust line_7: particles or minute surface irregularities in the OTA mirror surfaces. line_8: Determine the spectral energy distribution by obtaining low resolution line_9: spectra over a wide range of wavelengths. Also determine the radial line_10: dependence of the scattered light measurements. Derive the possible line_11: impact on HST observations. ! question: 3 section: 2 line_1: line_3: The detectors of the FOS are used to sample the sky immediately line_4: surrounding a bright star. Scattering will be caused by dust particles line_5: within the OTA or microscopic irregularities of the OTA mirror surfaces. line_6: A series of HST attitudes will be chosen to point the FOS at selected line_7: offset positions from the star which lie along a line at 45 degrees to line_8: the spider diffraction peaks. Spectroscopic data is taken in both the line_9: red and blue FOS channels. The FOS spertures increase in size with line_10: distance from the star. Measurements with a new aperture will overlap line_11: a portion of those obtained from the previously used aperture to enable line_12: the diffraction at the aperture to be accounted for as a function of line_13: wavelength. ! question: 3 section: 3 line_1: line_10: The FOS will enable a precise determination of the spectral energy line_11: distribution of the scattered light and any radial dependence line_12: close to the target. FOS spectral intensity measurements will line_13: provide an estimate of the wavelength dependence of the scattered light line_14: and some indication of the type and size of the scattering source. line_15: The WFC photometric data will enable a determination of the radial line_16: dependence of the intensity of scattered light at the furthest positions line_17: measured from the target. ! question: 3 section: 4 line_1: Test Procedure: line_2: Three phase FOS/PEAK: line_3: FOS TA: (FOS/BL), ACQ/PEAK, 1.0-PAIR-A line_4: FOS TA: (FOS/BL), ACQ/PEAK, 0.25-PAIR-A line_5: FOS TA: (FOS/BL), ACQ/PEAK, 0.1-PAIR-A line_6: FOS/BL, ACCUM, Grating G160L, time 5S, S/N=30, 1.0-PAIR-A and 0.1-PAIR-A line_7: Offset radius: 0.1 arcsec, 43S,S/N=10. line_8: Offset radius: 0.2 arcsec, 31S,S/N=3.0 line_9: Offset radius: 0.4 arcsec, 110S,S/N=2.0 line_10: Offset radius: 0.8 arcsec, 219S,S/N=1.0 line_11: Select 0.25-PAIR-A, offset 0.4 arcsec,29S,S/N=3.0 line_12: Offset radius: 0.8 arcsec, 101S,S/N=2.0 line_13: Offset radius: 1.6 arcsec, 203S,S/N=1.0 line_14: Offset radius: 3.2 arcsec, 900S line_15: Select 1.0-PAIR-A, offset 3.2 arcsec,300S line_16: Offset radius: 6.4 arcsec,500S line_17: SKY: Offset radius: 60 arcsec, 500S ! question: 3 section: 6 line_1: (FOS/RD), ACQ/PEAK, 1.0-PAIR-A,G650L (3770-8900), line_2: ACQ/PEAK, 0.25-PAIR-A line_3: ACQ/PEAK, 0.1-PAIR-A line_4: FOS/RD, ACCUM, Grating G650L 60S, 1.0-PAIR-A and 0.1-PAIR-A apertures line_6: Offset radius: 0.1 arcsec, 156S,S/N=10. line_7: Offset radius: 0.2 arcsec, 112S,S/N=3.0 line_8: Offset radius: 0.4 arcsec, 399S,S/N=2.0 line_10: Select 0.25-PAIR-A, offset 0.4 arcsec,64S,S/N=3.0 line_11: Offset radius: 0.8 arcsec, 227S,S/N=2.0 line_12: Offset radius: 1.6 arcsec, 454S,S/N=1.0 line_14: Select 1.0-PAIR-A, offset 1.6 arcsec,255S,S/N=3.0 line_15: Offset radius: 3.2 arcsec,277S,S/N=1.0 line_16: Offset radius: 6.4 arcsec,300S line_17: Select 2.0-BAR, offset 6.4 arcsec, 300S line_18: Offset radius: 12.8 arcsec, 300s line_19: Offset radius: 25.6 arcsec, 1200s line_20: Offset radius: 180 arcsec, 600s ! question: 4 section: 1 line_1: Submitted as an Observatory Level Test ! question: 5 section: 1 line_1: Test Requirements: line_2: - Exp lines which call for large offsets (27,29,31,66), line_3: use gyro track line_4: - Optical image quality should be near Level 1 (lambda / 8). line_5: - No observations made during SAA passage. line_6: - FGS/SI Phase III alignments are complete for the FOS. (1527) line_7: - Onboard (Mode II) FOS peak-up target acquisition is functional. (2195) line_10: - The POS TARG offsets were calculated using a line_11: position angle in the radial direction which approximately line_12: bissected the V2V3 axes. This direction is required line_13: to avoid the scattered light from the secondary spider. ! question: 5 section: 2 line_1: Test Repetition: line_2: - No repetitions of this OLT are scheduled during SV. ! question: 7 section: 1 line_1: Real Time Data Analysis Requirements: line_2: Not anticipated at this time. line_3: Off Line Data Analysis Requirements: line_4: FOS Observations: line_5: o Compare the spectrum taken with the FOS positioned at the sky line_6: background position to the spectra obtained at each of the offset line_7: positions for each detector and aperture combination. line_8: o Derive the following: line_9: o Intensity ratios at selected wavelengths. line_10: o Intensity ratios at various radial distances. line_11: o Estimate of wavelength dependence of intensity ratios. line_12: o Estimate of radial dependence of intensity ratios. ! question: 8 section: 1 line_1: ! question: 9 section: 1 line_1: Results of this OLT will be documented in an ST ScI Technical line_2: Report with distribution to appropriate personnel. Portions of line_3: this test will be presented at the HST symposium following the line_4: SV mission phase. Test results may also be submitted for pub- line_5: lication in an appropriate technical journal. ! !end of general form text general_form_address: lname: BURROWS fname: CHRIS mi: Y title: DR. inst: STSCI addr_1: 3700 SAN MARTIN DRIVE city: BALTIMORE state: MD zip: 21218 country: USA phone: 301-338-4780 from_date: 01-JAN-87 to_date: 01-JAN-95 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD44927 descr_1: BRIGHT A2V STAR pos_1: RA=06H 25M 32.9S +/- 0.1S, pos_2: DEC=+23D 19' 37" +/- 1" equinox: 2000 fluxnum_1: 1 fluxval_1: V = 7.10 +/- 0.05, TYPE = A2V fluxnum_2: 2 fluxval_2: B = 7.07 +/- 0.05 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: HD44927 config: FOS/BL opmode: ACQ/PEAK aperture: 1.0-PAIR-A sp_element: G160L num_exp: 1 time_per_exp: 1S s_to_n: 30 fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=6, param_2: SCAN-STEP=0.5 req_1: ONBOARD ACQ FOR 2; req_2: GROUP 1-15 WITHIN 48H; req_3: CYCLE 0 / 1-54; ! linenum: 2.000 targname: HD44927 config: ^ opmode: ACQ/PEAK aperture: 0.25-PAIR-A sp_element: ^ num_exp: 1 time_per_exp: 1S s_to_n: 30 fluxnum_1: ^ priority: ^ param_1: SEARCH-SIZE=5, param_2: SCAN-STEP=0.2, req_1: ONBOARD ACQ FOR 3 ! linenum: 3.000 targname: HD44927 config: ^ opmode: ACQ/PEAK aperture: 0.1-PAIR-A sp_element: ^ num_exp: 1 time_per_exp: 1S s_to_n: 30 fluxnum_1: ^ priority: ^ param_1: SEARCH-SIZE=5, param_2: SCAN-STEP=0.04 req_1: ONBOARD ACQ FOR 4-15 ! linenum: 4.000 targname: HD44927 config: ^ opmode: ACCUM aperture: 1.0-PAIR-A sp_element: G160L num_exp: 1 time_per_exp: 5S s_to_n: 10 fluxnum_1: ^ priority: ^ param_1: STEP-TIME=0.125 req_1: SEQ 4-8 NO GAP ! linenum: 4.500 targname: HD44927 config: ^ opmode: ^ aperture: 0.1-PAIR-A sp_element: ^ num_exp: 1 time_per_exp: 5S s_to_n: 10 fluxnum_1: ^ priority: ^ param_1: STEP-TIME=0.125 ! linenum: 5.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 43S s_to_n: 10 fluxnum_1: ^ priority: ^ req_1: POS TARG 0.08,-0.06 ! linenum: 6.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 31S s_to_n: 3 fluxnum_1: ^ priority: ^ req_1: POS TARG 0.16,-0.12 ! linenum: 7.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 110S s_to_n: 2 fluxnum_1: ^ priority: ^ req_1: POS TARG 0.32,-0.24 ! linenum: 8.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 219S s_to_n: 1 fluxnum_1: ^ priority: ^ req_1: POS TARG 0.64,-0.48 ! linenum: 9.000 targname: HD44927 config: FOS/BL opmode: ACCUM aperture: 0.25-PAIR-A sp_element: G160L num_exp: 1 time_per_exp: 29S s_to_n: 3 fluxnum_1: ^ priority: ^ req_1: SEQ 9-12 NO GAP; req_2: POS TARG 0.32,-0.24 ! linenum: 10.000 targname: HD44927 config: FOS/BL opmode: ACCUM aperture: 0.25-PAIR-A sp_element: G160L num_exp: 1 time_per_exp: 101S s_to_n: 2 fluxnum_1: 1 priority: 1 req_1: POS TARG 0.64,-0.48 ! linenum: 11.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 203S s_to_n: 1 fluxnum_1: ^ priority: ^ req_1: POS TARG 1.28,-0.96 ! linenum: 12.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 900S s_to_n: 1 fluxnum_1: ^ priority: ^ req_1: POS TARG 2.56,-1.92 ! linenum: 13.000 targname: HD44927 config: FOS/BL opmode: ACCUM aperture: 1.0-PAIR-A sp_element: G160L num_exp: 1 time_per_exp: 300S s_to_n: 3 fluxnum_1: ^ priority: ^ req_1: SEQ 13-15 NO GAP; req_2: POS TARG 2.56,-1.92 ! linenum: 14.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 500S s_to_n: 1 fluxnum_1: ^ priority: ^ req_1: POS TARG 5.12,-3.83 ! linenum: 15.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: 1 time_per_exp: 500S s_to_n: 3 fluxnum_1: ^ priority: ^ req_1: POS TARG 48.0,-35.9; req_2: GUID TOL 0.01"; comment_1: SKY 60" FROM TARGET. ! linenum: 38.000 targname: HD44927 config: FOS/RD opmode: ACQ/PEAK aperture: 1.0-PAIR-A sp_element: G650L num_exp: 1 time_per_exp: 0.3S s_to_n: 30 fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=6, param_2: SCAN-STEP=0.5 req_1: ONBOARD ACQ FOR req_2: 39; GROUP 38-54 req_3: WITHIN 48H ! linenum: 39.000 targname: ^ config: ^ opmode: ACQ/PEAK aperture: 0.25-PAIR-A sp_element: ^ num_exp: 1 time_per_exp: 0.3S s_to_n: 30 fluxnum_1: ^ priority: ^ param_1: SEARCH-SIZE=5, param_2: SCAN-STEP=0.2 req_1: ONBOARD ACQ FOR 40 ! linenum: 40.000 targname: ^ config: ^ opmode: ACQ/PEAK aperture: 0.1-PAIR-A sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 0.3S s_to_n: 30 fluxnum_1: ^ priority: ^ param_1: SEARCH-SIZE=5 param_2: SCAN-STEP=0.04 req_1: ONBOARD ACQ FOR req_2: 41-54; ! linenum: 41.000 targname: HD44927 config: FOS/RD opmode: ACCUM aperture: 1.0-PAIR-A sp_element: G650L wavelength: 3770-8900 num_exp: 1 time_per_exp: 60S s_to_n: 30 fluxnum_1: 1 priority: 1 req_1: SEQ 41-44 NO GAP ! linenum: 41.500 targname: HD44927 config: ^ opmode: ^ aperture: 0.1-PAIR-A sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: ^ priority: ^ ! linenum: 42.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 156S s_to_n: 10 fluxnum_1: ^ priority: ^ req_1: POS TARG 0.08,0.06 ! linenum: 43.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 112S s_to_n: 3 fluxnum_1: ^ priority: ^ req_1: POS TARG 0.16,0.12 ! linenum: 44.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 399S s_to_n: 2 fluxnum_1: ^ priority: ^ req_1: POS TARG 0.32,0.24 ! linenum: 45.000 targname: HD44927 config: FOS/RD opmode: ACCUM aperture: 0.25-PAIR-A sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 64S s_to_n: 3 fluxnum_1: ^ priority: ^ req_1: SEQ 45-47 NO GAP; req_2: POS TARG 0.32,0.24 ! linenum: 46.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 227S s_to_n: 2 fluxnum_1: ^ priority: ^ req_1: POS TARG 0.64,0.48 ! linenum: 47.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 454S s_to_n: 1 fluxnum_1: ^ priority: ^ req_1: POS TARG 1.28,0.96 ! linenum: 48.000 targname: HD44927 config: FOS/RD opmode: ACCUM aperture: 1.0-PAIR-A sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 255S s_to_n: 3 fluxnum_1: ^ priority: ^ req_1: SEQ 48-51 NO GAP; req_2: POS TARG 1.28,0.96 ! linenum: 49.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 227S s_to_n: 1 fluxnum_1: ^ priority: ^ req_1: POS TARG 2.56,1.92 ! linenum: 50.000 targname: HD44927 config: ^ opmode: ^ aperture: ^ sp_element: ^ wavelength: ^ num_exp: 1 time_per_exp: 1817S s_to_n: 1 fluxnum_1: ^ priority: ^ req_1: POS TARG 5.12,3.83 ! linenum: 51.000 targname: HD44927 config: FOS/RD opmode: ACCUM aperture: 2.0-BAR sp_element: G650L wavelength: 3770-8900 num_exp: 1 time_per_exp: 300S s_to_n: 1 fluxnum_1: 1 priority: 1 req_1: POS TARG 5.12,3.83; ! linenum: 52.000 targname: HD44927 config: FOS/RD opmode: ACCUM aperture: 2.0-BAR sp_element: G650L wavelength: 3770-8900 num_exp: 1 time_per_exp: 300S s_to_n: 1 fluxnum_1: 1 priority: 1 req_1: POS TARG 10.24,7.66; ! linenum: 53.000 targname: HD44927 config: FOS/RD opmode: ACCUM aperture: 2.0-BAR sp_element: G650L wavelength: 3770-8900 num_exp: 1 time_per_exp: 1200S s_to_n: 1 fluxnum_1: 1 priority: 1 req_1: POS TARG 20.48,15.36; ! linenum: 54.000 targname: HD44927 config: FOS/RD opmode: ACCUM aperture: 2.0-BAR sp_element: G650L wavelength: 3770-8900 num_exp: 1 time_per_exp: 300S s_to_n: 1 fluxnum_1: 1 priority: 1 req_1: POS TARG 144.0,107.7; comment_1: OFFSET 180" FROM TARGET. USE GYRO comment_2: TRACKING FOR LINE 54. ! ! end of exposure logsheet ! No scan data records found