! File: 1153C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:03:49:10 coverpage: title_1: UV INTERSTELLAR EXTINCTION IN THE SMC sci_cat: INTERSTELLAR MEDIUM sci_subcat: DUST proposal_for: GTO/HRS pi_title: PROF. pi_fname: JOHN pi_mi: B. pi_lname: HUTCHINGS pi_inst: DOMINION ASTROPHYSICAL OBSERVATORY pi_country: CANADA pi_phone: (604)388-3909 keywords_1: REDDENED BO STARS IN SMC FOR UV EXTINCTION hours_pri: 0.50 num_pri: 6 pi_position: PROFESSOR ! end of coverpage abstract: line_1: IUE spectra have shown that the SMC has high UV extinction compared with the line_2: galaxy. Because of this IUE data have not been good enough to define the line_3: extinction curve well. This proposal is to obtain good S/N data on reddened line_4: and unreddened stars of the same type in the SMC, to obtain better estimate of line_5: the UV extinction curve. Parallel WFC exposures in the SMC with the prism will line_6: pick out hot stars for further studies and map the UV extinction. ! ! end of abstract general_form_proposers: lname: HUTCHINGS fname: JOHN mi: B. inst: DOMINION ASTROPHYSICAL OBSERVATORY country: CANADA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: All observations with Blue digicon. Each star to be observed with G130H, G190H, line_2: G270H gratings; 0.5" aperture to be used for all observations. Parallel line_3: observations with the WFC in UV grating mode requested for the duration of the line_4: dwell time at each star. ! question: 4 section: 1 line_1: ST observations are required to obtain the high S/N data required. IUE is not line_2: sensitive enough and has poor S/N. The dispersion chosen will provide line_3: sufficient resolution to distinguish line features from continuum variations. ! question: 7 section: 1 line_1: UV flux distributions of three stars will be compared with each other and with line_2: appropriate model atmospheres, to derive extinction curves. Stellar line line_3: features will also be examined as part of stellar wind studies in the SMC. WFC line_4: UV grating data will provide deep investigation of SMC stellar populations, line_5: with particular emphasis on reddened early type stars. Appropriate facilities line_6: and software exist at DAO for all analysis. ! question: 10 section: 1 line_1: All analysis on spectra can be done at DAO from standard ST product tapes. ! question: 13 section: 1 line_1: FOS spectra will be obtained in the 1200-3000A region of one unreddened and two line_2: reddened early B type stars in the SMC. The data will define the UV extinction line_3: curves. The reddened stars have very differing degrees of visible diffuse line_4: interstellar band absorption. ! !end of general form text general_form_address: lname: HUTCHINGS fname: JOHN mi: B. title: PROF. category: PI inst: DOMINION ASTROPHYSICAL OBSERVATORY addr_1: 5071 W. SAANICH RD. addr_2: R.R. #5 addr_3: V8X 4M6 city: VICTORIA state: BC country: CANADA ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: AZZ104 descr_1: B1 STAR pos_1: RA=0H 50M 46.2S +/- 1", pos_2: DEC=-72D 56' 6" +/- 1" equinox: 1950 pm_or_par: NO fluxnum_1: 1 fluxval_1: V=13.13 +/- 0.05 fluxnum_2: 2 fluxval_2: E(B-V)=0 +/- 0.05 ! targnum: 2 name_1: AZZ398 descr_1: B2 STAR pos_1: RA=1H 5M 22.2S +/- 1", pos_2: DEC=-72D 4' 0" +/- 1" equinox: ^ pm_or_par: ^ fluxnum_1: 1 fluxval_1: V=13.85 +/- 0.05 fluxnum_2: 2 fluxval_2: E(B-V)=0.2 +/- 0.05 ! targnum: 3 name_1: AZZ456 descr_1: BO STAR pos_1: RA=1H 10M 11.4S +/- 1", pos_2: DEC=-72D 50' 48" +/- 1" equinox: ^ pm_or_par: ^ fluxnum_1: 1 fluxval_1: V=12.88 +/- 0.05 fluxnum_2: 2 fluxval_2: E(B-V) = 0.3 +/- 0.05 ! ! end of fixed targets ! No solar system records found generic_targets: targnum_1: 4 name_1: AZZ104-FIELD descr_1: FIELD IN WFC criteria_1: SMC FIELD IN WFC, FOR PARALLEL OBS ! targnum_1: 5 name_1: AZZ398-FIELD descr_1: ^ criteria_1: ^ ! targnum_1: 6 name_1: AZZ456-FIELD descr_1: ^ criteria_1: ^ ! ! end of generic targets exposure_logsheet: linenum: 1.000 targname: AZZ104 config: FOS/BL opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: 1 time_per_exp: 5S priority: 1 param_1: BRIGHT=65000 req_1: ONBOARD ACQ FOR 2-4; req_2: CYCLE 2 /1-15 ! linenum: 2.000 targname: ^ config: ^ opmode: ACCUM aperture: 0.5 sp_element: G130H wavelength: 1150-1608 num_exp: ^ time_per_exp: 2M priority: ^ req_1: SEQ 2-4 NO GAP ! linenum: 3.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: G190H wavelength: 1595-2282 num_exp: ^ time_per_exp: ^ priority: ^ ! linenum: 4.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: G270H wavelength: 2227-3306 num_exp: ^ time_per_exp: 1M priority: ^ ! linenum: 5.000 targname: AZZ104-FIELD config: WFC opmode: IMAGE aperture: ALL sp_element: G200L num_exp: ^ time_per_exp: 5M priority: ^ req_1: PAR WITH 2 ! linenum: 6.000 targname: AZZ398 config: FOS/BL opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: ^ time_per_exp: 11S priority: ^ param_1: BRIGHT=60000 req_1: ONBOARD ACQ FOR 7-9 ! linenum: 7.000 targname: ^ config: ^ opmode: ACCUM aperture: 0.5 sp_element: G130H wavelength: 1150-1608 num_exp: ^ time_per_exp: 3M priority: ^ req_1: SEQ 7-9 NO GAP ! linenum: 8.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: G190H wavelength: 1595-2282 num_exp: ^ time_per_exp: ^ priority: ^ ! linenum: 9.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: G270H wavelength: 2227-3306 num_exp: ^ time_per_exp: 2M priority: ^ ! linenum: 10.000 targname: AZZ398-FIELD config: WFC opmode: IMAGE aperture: ALL sp_element: G200L num_exp: 1 time_per_exp: 8M priority: 1 req_1: PAR WITH 7 ! linenum: 11.000 targname: AZZ456 config: FOS/BL opmode: ACQ/BINARY aperture: 4.3 sp_element: MIRROR num_exp: ^ time_per_exp: 11S priority: ^ param_1: BRIGHT=60000 req_1: ONBOARD ACQ FOR 12-14 ! linenum: 12.000 targname: AZZ456 config: FOS/BL opmode: ACCUM aperture: 0.5 sp_element: G130H wavelength: 1150-1608 num_exp: 1 time_per_exp: 3M priority: 1 req_1: SEQ 12-14 NO GAP ! linenum: 13.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: G190H wavelength: 1595-2282 num_exp: ^ time_per_exp: ^ priority: ^ ! linenum: 14.000 targname: ^ config: ^ opmode: ^ aperture: ^ sp_element: G270H wavelength: 2227-3306 num_exp: ^ time_per_exp: 2M priority: ^ ! linenum: 15.000 targname: AZZ456-FIELD config: WFC opmode: IMAGE aperture: ALL sp_element: G200L num_exp: ^ time_per_exp: 8M priority: ^ req_1: PAR WITH 12 ! ! end of exposure logsheet ! No scan data records found