! File: 4673C.PROP ! Database: PEPDB ! Date: 22-FEB-1994:21:59:42 coverpage: title_1: ULTRAVIOLET INTERSTELLAR POLARIZATION-CYC3HIGH sci_cat: INTERSTELLAR MEDIUM sci_subcat: DUST proposal_for: GO pi_fname: WILLIAM pi_mi: B. pi_lname: SOMERVILLE pi_inst: UNIVERSITY COLLEGE LONDON hours_pri: 5.00 num_pri: 2 fos: Y off_fname: SIR ROBERT off_lname: WILSON off_title: HEAD OF DEPARTMENT off_inst: 8090 off_addr_1: DEPARTMENT OF PHYSICS AND ASTRONOMY, off_addr_2: UNIVERSITY COLLEGE LONDON, off_city: LONDON WC1E 6BT off_country: UK off_phone: 071-380-7154 ! end of coverpage abstract: line_1: We propose to study interstellar polarization in the spectra of reddened line_2: early-type stars throughout the ultraviolet range. This is an extension of line_3: work done in the optical and infrared and addresses three principal line_4: observational questions: (1) does the same empirical polarization curve line_5: (Serkowski's Law) extend into the UV\?; (2) does the 2175 A absorption feature line_6: show polarization\?; (3) in the far ultraviolet, does the polarization reflect line_7: the strong rise seen in the extinction curve\? The results will provide vital line_8: new information about the composition and the size and shape distributions of line_9: the grains, and the nature of the carrier of the 2175 A feature. Targets are line_10: selected to have a variety of ultraviolet extinction and optical polarization line_11: properties, to enable us to examine whether the ultraviolet polarization is line_12: related to any of these. line_13: In Cycle 1, our proposal P2245 has been awarded time sufficient to observe line_14: three targets; the present proposal is to increase the number of sightlines line_15: studied. In the recent WUPPE observations, evidence was found for excess line_16: polarization in the 2175 A feature in one star, and excess in the far UV in line_17: two others, out of six stars observed, showing that interstellar properties line_18: can be different in different directions. The HST observations will have line_19: better signal-to-noise, better resolution and extend to shorter wavelengths line_20: than the WUPPE data. ! ! end of abstract general_form_proposers: lname: SOMERVILLE fname: WILLIAM title: PI mi: B. inst: UNIVERSITY COLLEGE LONDON country: UNITED KINGDOM esa: Y ! lname: WILSON fname: SIR ROBERT inst: UNIVERSITY COLLEGE LONDON country: UNITED KINGDOM esa: Y ! lname: CARNOCHAN fname: DAVID mi: J. inst: UNIVERSITY COLLEGE LONDON country: UNITED KINGDOM esa: Y ! lname: MCNALLY fname: DEREK inst: UNIVERSITY COLLEGE LONDON country: UNITED KINGDOM esa: Y ! lname: NANDY fname: KASHI inst: ROYAL OBSERVATORY, EDINBURGH country: UNITED KINGDOM esa: Y ! lname: MORGAN fname: DAVID mi: H. inst: ROYAL OBSERVATORY, EDINBURGH country: UNITED KINGDOM esa: Y ! lname: WHITTET fname: DOUGLAS C. mi: B. inst: RENSSELAER POLYTECHNIC INSTITUTE country: USA ! lname: MARTIN fname: PETER mi: G. inst: UNIVERSITY OF TORONTO country: CANADA ! lname: KIM fname: SANG-HEE inst: UNIVERSITY OF TORONTO country: CANADA ! ! end of general_form_proposers block ! No records found general_form_address: lname: SOMERVILLE fname: WILLIAM mi: B. category: PI inst: University College London addr_1: DEPARTMENT OF PHYSICS AND ASTRONOMY, addr_3: GOWER STREET, city: LONDON WC1E 6BT country: UNITED KINGDOM phone: 071-387-7050 X 3477 telex: 28722 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD99872 name_2: GSC9233-02659 descr_1: A,111,G,508,706 pos_1: RA= 11H 28M 18.34S +/- 0.5", pos_2: DEC = -72D 28' 27.3" +/- 0.5" equinox: 2000 pm_or_par: N comment_1: GSC COORDINATES comment_2: SAO PROPER MOTIONS comment_3: UV FLUXES FROM S2/68 comment_4: ANOMALOUS UV EXTINCTION fluxnum_1: 1 fluxval_1: V = 6.08 +/- 0.05, B-V = 0.16 +/- 0.05 fluxnum_2: 2 fluxval_2: TYPE=B3 V, E(B-V) = 0.37 +/- 0.05 fluxnum_3: 3 fluxval_3: F-CONT (2500) = 18.04 +/- 0.96 E-12 fluxnum_4: 4 fluxval_4: F-CONT (1900) = 34.25 +/- 1.34 E-12 fluxnum_5: 5 fluxval_5: F-CONT (1400) = 74.39 +/- 1.28 E-12 ! targnum: 2 name_1: HD170740 name_2: GSC5695-00802 descr_1: A,111,G,508,706 pos_1: RA= 18H 31M 25.65S +/- 0.5", pos_2: DEC = -10D 47' 44.8" +/- 0.5" equinox: 2000 pm_or_par: N comment_1: GSC COORDINATES comment_2: PERTH70 PROPER MOTIONS comment_3: UV FLUXES FROM S2/68 comment_4: ANOMALOUS UV EXTINCTION comment_5: THERE IS A B9 COMPANION, comment_6: V=9.2, 13.3" AWAY, comment_7: AT RA 24.7S, DEC 48" fluxnum_1: 1 fluxval_1: V = 5.72 +/- 0.05, B-V = 0.24 +/- 0.05 fluxnum_2: 2 fluxval_2: TYPE=B2 V, E(B-V) = 0.48 +/- 0.05 fluxnum_3: 3 fluxval_3: F-CONT (2500) = 25.17 +/- 0.50 E-12 fluxnum_4: 4 fluxval_4: F-CONT (1900) = 32.38 +/- 0.72 E-12 fluxnum_5: 5 fluxval_5: F-CONT (1400) = 53.11 +/- 0.67 E-12 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: HD99872 config: FOS/BL opmode: ACQ/PEAK aperture: 4.3 sp_element: G570H num_exp: 1 time_per_exp: 0.6S fluxnum_1: 1 fluxnum_2: 2 priority: 1 param_1: TYPE=UP req_1: ONBOARD ACQ FOR 2; req_2: SEQ 1-3; req_3: SPATIAL SCAN; req_4: CYCLE 3 / 1-12 comment_1: COUNT RATE AT 4600 = 4450 ! linenum: 2.000 targname: HD99872 config: FOS/BL opmode: ACQ/PEAK aperture: 1.0 sp_element: G570H num_exp: 1 time_per_exp: 1.0S fluxnum_1: 1 fluxnum_2: 2 priority: 1 param_1: TYPE=UP req_1: ONBOARD ACQ FOR 3; req_2: SPATIAL SCAN comment_1: COUNT RATE AT 4600 = 2900 ! linenum: 3.000 targname: HD99872 config: FOS/BL opmode: ACQ/PEAK aperture: 0.5 sp_element: G570H num_exp: 1 time_per_exp: 3.0S fluxnum_1: 1 fluxnum_2: 2 priority: 1 param_1: TYPE=UP param_2: SEARCH-SIZE-X=3 param_3: SCAN-STEP-X=0.3 param_4: SEARCH-SIZE-Y=3 param_5: SCAN-STEP-Y=0.3 req_1: ONBOARD ACQ FOR 4,5,6 comment_1: COUNT RATE AT 4600 = 1830 ! linenum: 4.000 targname: HD99872 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G130H num_exp: 1 time_per_exp: 45.20M s_to_n: 520 fluxnum_1: 5 priority: 1 param_1: POLSCAN=8B comment_1: POLARIZATION REQUIRED OVER MAXIMUM comment_2: AVAILABLE WAVELENGTH RANGE. comment_3: POLARIZATION ERROR 0.1% IN 7.5 A AT comment_4: 1400 A REQUIRES 127000 COUNTS IN comment_5: 7-8 PIXELS RESULTING IN STATED S/N comment_6: PER PIXEL IN SUM OF ALL 16 SPECTRA. ! linenum: 5.000 targname: HD99872 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H num_exp: 1 time_per_exp: 19.25M s_to_n: 640 fluxnum_1: 4 priority: 1 param_1: POLSCAN=8B comment_1: POLARIZATION ERROR 0.1% IN 7.5 A AT comment_2: 1900 A REQUIRES 127000 COUNTS IN comment_3: 5-6 PIXELS RESULTING IN STATED S/N comment_4: PER PIXEL IN SUM OF ALL 16 SPECTRA. ! linenum: 6.000 targname: HD99872 config: FOS/BL opmode: ACCUM aperture: 1.0 sp_element: G270H num_exp: 1 time_per_exp: 8.32M s_to_n: 720 fluxnum_1: 3 priority: 1 param_1: POLSCAN=8B comment_1: POLARIZATION ERROR 0.1% IN 7.5 A AT comment_2: 2500 A REQUIRES 127000 COUNTS IN 4 comment_3: PIXELS RESULTING IN STATED S/N PER comment_4: PIXEL IN SUM OF ALL 16 SPECTRA. ! linenum: 7.000 targname: HD170740 config: FOS/BL opmode: ACQ/PEAK aperture: 4.3 sp_element: G570H num_exp: 1 time_per_exp: 0.5S fluxnum_1: 1 fluxnum_2: 2 priority: 1 param_1: TYPE=UP req_1: ONBOARD ACQ FOR 8; req_2: SEQ 7-9; req_3: SPATIAL SCAN comment_1: COUNT RATE AT 4600 = 6830 ! linenum: 8.000 targname: HD170740 config: FOS/BL opmode: ACQ/PEAK aperture: 1.0 sp_element: G570H num_exp: 1 time_per_exp: 0.7S fluxnum_1: 1 fluxnum_2: 2 priority: 1 param_1: TYPE=UP req_1: ONBOARD ACQ FOR 9; req_2: SPATIAL SCAN comment_1: COUNT RATE AT 4600 = 4440 ! linenum: 9.000 targname: HD170740 config: FOS/BL opmode: ACQ/PEAK aperture: 0.5 sp_element: G570H num_exp: 1 time_per_exp: 2.0S fluxnum_1: 1 fluxnum_2: 2 priority: 1 param_1: TYPE=UP param_2: SEARCH-SIZE-X=3 param_3: SCAN-STEP-X=0.3 param_4: SEARCH-SIZE-Y=3 param_5: SCAN-STEP-Y=0.3 req_1: ONBOARD ACQ FOR 10,11,12 comment_1: COUNT RATE AT 4600 = 2810 ! linenum: 10.000 targname: HD170740 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G130H num_exp: 2 time_per_exp: 26.774M s_to_n: 520 fluxnum_1: 5 priority: 1 param_1: POLSCAN=8B comment_1: POLARIZATION REQUIRED OVER MAXIMUM comment_2: AVAILABLE WAVELENGTH RANGE. comment_3: POLARIZATION ERROR 0.1% IN 7.5 A AT comment_4: 1400 A REQUIRES 127000 COUNTS IN comment_5: 7-8 PIXELS RESULTING IN STATED S/N comment_6: PER PIXEL IN SUM OF ALL 16 SPECTRA. ! linenum: 11.000 targname: HD170740 config: FOS/BL opmode: ACCUM aperture: 4.3 sp_element: G190H num_exp: 1 time_per_exp: 27.374M s_to_n: 640 fluxnum_1: 4 priority: 1 param_1: POLSCAN=8B comment_1: POLARIZATION ERROR 0.1% IN 7.5 A AT comment_2: 1900 A REQUIRES 127000 COUNTS IN 5-6 comment_3: PIXELS RESULTING IN STATED S/N PER comment_4: PIXEL IN SUM OF ALL 16 SPECTRA. ! linenum: 12.000 targname: HD170740 config: FOS/BL opmode: ACCUM aperture: 1.0 sp_element: G270H num_exp: 1 time_per_exp: 10.00M s_to_n: 720 fluxnum_1: 3 priority: 1 param_1: POLSCAN=8B comment_1: POLARIZATION ERROR 0.1% IN 7.5 A AT comment_2: 2500 A REQUIRES 127000 COUNTS IN 4 comment_3: PIXELS RESULTING IN STATED S/N PER comment_4: PIXEL IN SUM OF ALL 16 SPECTRA. ! ! end of exposure logsheet scan_data: line_list: 1 fgs_scan: cont_dwell: D dwell_pnts: 3 dwell_secs: 1.00 scan_width: 0.0000 scan_length: 2.8000 sides_angle: 90.0000 number_lines: 1 scan_rate: 0.0000 first_line_pa: 0.0000 scan_frame: S/C len_offset: 1.4 wid_offset: 0 ! line_list: 2 fgs_scan: cont_dwell: D dwell_pnts: 6 dwell_secs: 1.00 scan_width: 0.7000 scan_length: 3.5000 sides_angle: 90.0000 number_lines: 2 scan_rate: 0.0000 first_line_pa: 90.0000 scan_frame: S/C len_offset: 1.75 wid_offset: 0.35 ! line_list: 7 fgs_scan: cont_dwell: D dwell_pnts: 3 dwell_secs: 1.00 scan_width: 0.0000 scan_length: 2.8000 sides_angle: 90.0000 number_lines: 1 scan_rate: 0.0000 first_line_pa: 0.0000 scan_frame: S/C len_offset: 1.4 wid_offset: 0 ! line_list: 8 fgs_scan: cont_dwell: D dwell_pnts: 6 dwell_secs: 1.00 scan_width: 0.7000 scan_length: 3.5000 sides_angle: 90.0000 number_lines: 2 scan_rate: 0.0000 first_line_pa: 90.0000 scan_frame: S/C len_offset: 1.75 wid_offset: 0.35 ! ! end of scan data