! File: 1173C.PROP ! Database: PEPDB ! Date: 16-FEB-1994:04:38:52 coverpage: title_1: SPECTROSCOPY AND REDSHIFT OF A WHITE DWARF sci_cat: STELLAR ASTROPHYSICS sci_subcat: SUBLUMINOUS STARS proposal_for: GTO/HRS pi_title: DR. pi_fname: ALBERT pi_lname: BOGGESS pi_inst: NASA, GODDARD SPACE FLIGHT CENTER pi_country: USA pi_phone: (301) 344-5975 keywords_1: STARS - WHITE DWARFS - ABUNDANCE - CHEMICAL PECULIAR keywords_2: STAR - MASS LOSS hours_pri: 1.60 num_pri: 2 ! end of coverpage abstract: line_1: One hot DA white dwarf, G191-B2B will be observed with the HRS. line_2: This object have been observed previously with IUE and reveal trace line_3: amounts of heavy elements either in the photosphere, line_4: or in a surrounding expanding halo. line_5: These observations have three scientific objectives: line_6: 1) to quantitatively test if diffusion and levitation can explain the observed line_7: abundances in these objects; 2) search for other heavier line_8: atomic species in the photosphere; and line_9: 3) by also observing the K-dwarf companion in this visual line_10: binary, to derive a gravitational redshift for the white line_11: dwarf. ! ! end of abstract general_form_proposers: lname: BOGGESS fname: ALBERT inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! lname: BRUHWEILER fname: FRED mi: C. inst: CATHOLIC UNIVERSITY OF AMERICA country: USA ! lname: KONDO fname: YOJI inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: We wish to obtain high-dispersion HRS data at a minimum S/N ratio of 20/1 for line_2: sharp-lined features associated with hot white dwarfs. At this time, there is line_3: still some question about the sensitivity of the G140M shortward of 1300 A. We line_4: may want to refine these observations as improved calibration data become line_5: available. line_7: W1346 is to be observed in Cycle 1, priority 3. line_8: G191-B2B is to be observed in Cycle 0, priority 3. ! question: 4 section: 1 line_1: The observed phenomena was discovered in the Ultraviolet. No hint of similar line_2: features is seen at other wavelengths. ! question: 7 section: 1 line_1: All data reduction and analysis is expected to be performed at NASA/GSFC. line_2: Radial velocities, equivalent widths, and other line profile information will line_3: be deduced. Available codes will be used to deduce photospheric abundances in line_4: W 1346. ! question: 10 section: 1 line_1: All the necessary software for analysis of the data is available at NASA/GSFC. line_2: F. Bruhweiler and Y. Kondo will participate in the analysis of data. ! question: 13 section: 1 line_1: One hot DA white dwarfs will be observed with the HRS. These observations have line_2: three scientific objectives: 1) to quantitatively test if diffusion and line_3: levitation or some other process can produce the observed abundances in these line_4: objects; 2) to analyze absorption profile information to obtain a clearer line_5: understanding of the mass loss process in these objects; and 3) to derive ionic line_6: column densities from the interstellar features to provide a clearer picture of line_7: the physical conditions of the Local ISM. ! !end of general form text general_form_address: lname: BRUHWEILER fname: FRED mi: C. category: CON inst: CATHOLIC UNIVERSITY OF AMERICA addr_1: DEPARTMENT OF PHYSICS city: WASHINGTON state: DC zip: 20064 country: USA phone: (202) 319-5315 ! lname: KONDO fname: YOJI category: CON inst: NASA, GODDARD SPACE FLIGHT CENTER addr_1: CODE 684 city: GREENBELT state: MD zip: 20771 country: USA phone: (301) 286-6247 ! lname: BOGGESS fname: ALBERT title: DR. category: PI inst: NASA, GODDARD SPACE FLIGHT CENTER addr_1: CODE 600 city: GREENBELT state: MD zip: 20771 country: USA phone: (301) 286-5975 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: G191-B2B descr_1: HOT DA WHITE DWARF pos_1: RA = 05H 05M 30.617S +/-1", pos_2: DEC = +52D 49' 53.97" +/-1" equinox: 2000 pm_or_par: Y pos_epoch_bj: B pos_epoch_yr: 1950.00 ra_pm_val: 0.000533 ra_pm_unct: 0.000200 dec_pm_val: -0.0880 dec_pm_unct: 0.0030 an_prlx_val: 0.0200 an_prlx_unct: 0.0100 fluxnum_1: 1 fluxval_1: V = 11.8 fluxnum_2: 2 fluxval_2: F-CONT(1260) = 1.1 E-11 fluxnum_3: 3 fluxval_3: F-CONT(1800) = 5.5 E-12 ! targnum: 2 name_1: G191-B2A descr_1: K DWARF COMPANION OF HOT DA WHITE DWARF pos_1: RA = 05H 05M 30.617S +/-1", pos_2: DEC = +52D 49' 53.97" +/-1" equinox: 2000 pm_or_par: Y pos_epoch_bj: B pos_epoch_yr: 1950.00 ra_pm_val: 0.000533 ra_pm_unct: 0.000200 dec_pm_val: -0.0880 dec_pm_unct: 0.0030 an_prlx_val: 0.0200 an_prlx_unct: 0.0100 fluxnum_1: 1 fluxval_1: V = 7.2 fluxnum_2: 2 fluxval_2: F-CONT(2800) = 1.5E-13 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: G191-B2B config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 57.8S fluxnum_1: 1 priority: 3 param_1: SEARCH-SIZE=5, param_2: BRIGHT=DEF, param_3: FAINT=0, param_4: LOCATE=NO, param_5: MAP=END-POINT req_1: ONBOARD ACQ FOR 1.2-5.5; req_2: CYCLE 2 / 1.0-5.5 comment_1: STEP-TIME=0.2. ! linenum: 1.200 targname: G191-B2B config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 73.6S fluxnum_1: 1 priority: 3 req_1: ONBOARD ACQ FOR 1.3 comment_1: STEP-TIME=1.6S ! linenum: 1.300 targname: G191-B2B config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 53.0S fluxnum_1: 1 priority: 3 param_1: SEARCH-SIZE=1, param_2: MAP=END-POINT, param_3: LOCATE=NO, param_4: FAINT=0 req_1: ONBOARD ACQ FOR 1.6 comment_1: TAKE MAP AFTER CENTERING comment_2: 200 MSEC INTEGRATIONS ! linenum: 1.600 targname: G191-B2B config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 73.6S fluxnum_1: 1 priority: 3 req_1: ONBOARD ACQ FOR 4.0-5.5 comment_1: STEP-TIME=1.6S comment_2: USE ONLY IF SSA PEAKUP VALIDATED, comment_3: OTHERWISE REPLACE WITH SSA MAP ! linenum: 4.000 targname: G191-B2B config: HRS opmode: ACCUM aperture: 0.25 sp_element: G160M wavelength: 1340 num_exp: 4 time_per_exp: 270S s_to_n: 50 fluxnum_1: 2 priority: 3 param_1: FP-SPLIT=STD ! linenum: 4.500 targname: WAVE config: HRS opmode: ACCUM aperture: SC1 sp_element: G160M wavelength: 1340 num_exp: 1 time_per_exp: 30S fluxnum_1: 2 priority: 3 req_1: CALIB FOR 4; req_2: SEQ 4-4.5 NON-INT ! linenum: 5.000 targname: G191-B2B config: HRS opmode: ACCUM aperture: 0.25 sp_element: G160M wavelength: 1374 num_exp: 4 time_per_exp: 120S s_to_n: 30 fluxnum_1: 3 priority: 3 ! linenum: 5.500 targname: WAVE config: HRS opmode: ACCUM aperture: SC1 sp_element: G160M wavelength: 1340 num_exp: 1 time_per_exp: 30S fluxnum_1: 2 priority: 3 req_1: CALIB FOR 5; req_2: SEQ 5-5.5 NON-INT ! linenum: 10.000 targname: G191-B2A config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 57.8S fluxnum_1: 1 priority: 3 param_1: SEARCH-SIZE=5, param_2: BRIGHT=DEF, param_3: FAINT=0, param_4: LOCATE=NO, param_5: MAP=END-POINT req_1: ONBOARD ACQ FOR 10.2-11; req_2: CYCLE 2 / 10-11 comment_1: STEP-TIME=0.2. ! linenum: 10.200 targname: G191-B2A config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 73.6S fluxnum_1: 1 priority: 3 req_1: ONBOARD ACQ FOR 10.3 comment_1: STEP-TIME=1.6S ! linenum: 10.300 targname: G191-B2A config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 53.0S fluxnum_1: 1 priority: 3 param_1: SEARCH-SIZE=1, param_2: MAP=END-POINT, param_3: LOCATE=NO, param_4: FAINT=0 req_1: ONBOARD ACQ FOR 10.6 comment_1: TAKE MAP AFTER CENTERING comment_2: 200 MSEC INTEGRATIONS ! linenum: 10.600 targname: G191-B2A config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 73.6S fluxnum_1: 1 priority: 3 req_1: ONBOARD ACQ FOR 11 comment_1: STEP-TIME=1.6S comment_2: USE ONLY IF SSA PEAKUP VALIDATED, comment_3: OTHERWISE REPLACE WITH SSA MAP ! linenum: 11.000 targname: G191-B2A config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2800 num_exp: 7 time_per_exp: 326.4S s_to_n: 20 fluxnum_1: 1 priority: 3 param_1: FP-SPLIT=STD ! ! end of exposure logsheet ! No scan data records found