! File: 3207C.PROP ! Database: PEPDB ! Date: 18-FEB-1994:21:57:04 coverpage: title_1: ELEMENTAL ABUNDANCES IN EARLY-TYPE STARS -- CYCLE 1 sci_cat: STELLAR ASTROPHYSICS proposal_for: GTO/HRS longterm: 2 cont_id: 1182 pi_fname: DAVID pi_mi: S. pi_lname: LECKRONE pi_inst: NASA, GODDARD SPACE FLIGHT CENTER pi_country: USA pi_phone: 301-286-8904 keywords_1: MS STAR, HB STAR, CHEMICALLY PECULIAR STAR, ABUNDANCE, keywords_2: SPECTROSCOPY, UV hours_pri: 4.43 num_pri: 1 pi_position: HRS CO-INVESTIGATOR ! end of coverpage abstract: line_1: The resolving power and photometric quality of GHRS data are line_2: exploited in an investigation of the elemental abundances, line_3: atmospheric properties and evolutionary characteristics of line_4: sharp-lined B and A stars. Three classes of stars are included line_5: in the overall program - chemically peculiar (CP) non-magnetic line_6: late B stars of the HgMn class, early A-type horizontal line_7: branch stars and sharp-lined normal stars ranging from B6 to A2. line_8: The Cycle 1 segment of this program continues the systematic study line_9: of anomalies in the abundance of Hg and in the mixture of Hg isotopes. line_10: Abundances of Hg derived from lines of Hg I, II, and III in the line_11: relatively hot Hg-rich star, kappa Cnc, will be used to test line_12: diffusion-theory models for the production of abundance and line_13: isotope anomalies. The Hg abundance of the normal A1 star, line_14: Sirius, will be derived. Abundances of many other species with line_15: lines in the observed intervals will also be obtained. A line_16: "standard" spectral interval in Sirius, of considerable interest line_17: for atomic physics, is included in the program. ! ! end of abstract general_form_proposers: lname: LECKRONE fname: DAVID mi: S. inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! lname: BRANDT fname: JOHN mi: C. inst: UNIVERSITY OF COLORADO country: USA ! lname: CARPENTER fname: KENNETH mi: G. inst: NASA, GODDARD SPACE FLIGHT CENTER country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: In Cycle 1, GHRS small science aperture, accum mode observations line_2: will be obtained with Echelle-B at five wavelength intervals line_3: in the chemically peculiar B star kappa Cancri. line_5: S/N per quarterstep will range from 40 to 100. ! question: 4 section: 1 line_1: line_3: Described under 2. above and in the HRS proposal. ! question: 7 section: 1 line_1: line_4: Data will be analysed at the RDAF facility at GSFC. Model atmospheres and line_5: synthetic spectra will be computed with ATLAS-based codes currently running on line_6: the HRSVAX at the GSFC. ! question: 10 section: 1 line_1: line_4: All funded support will be obtained through direct transfer of funds from ST line_5: Project. In-house facilities for data analysis are described in 7. above. ! question: 13 section: 1 line_1: line_2: High dispersion (R=85000) GHRS spectra will be utilized to line_3: explore the behavior of Hg I, II, and III in a HgMn star, to line_4: measure the Hg abundance in a "normal" A star, to obtain line_5: abundances of numerous other species observed in these spectral line_6: intervals, and to investigate phenomena of atomic physics. ! !end of general form text general_form_address: lname: LECKRONE fname: DAVID mi: S. category: PI inst: NASA, GODDARD SPACE FLIGHT CENTER ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HD78316 name_2: KAPPA-CNC descr_1: BP HGMN STAR pos_1: RA=09H05M02.387S +/- 0.2", pos_2: DEC=+10D52'13.91" +/- 0.2" equinox: 1950 pm_or_par: Y pos_epoch_yr: 1960.60 ra_pm_val: -0.002333 ra_pm_unct: 0.000667 dec_pm_val: -0.0320 dec_pm_unct: 0.0100 rv_or_z: V=+24 comment_1: AGK 3 fluxnum_1: 1 fluxval_1: V=5.24+/-.05,TYPE=BP fluxnum_2: 2 fluxval_2: F-CONT(1742)=1.3E-10 fluxnum_3: 3 fluxval_3: F-CONT(1849)=1.2E-10 fluxnum_4: 4 fluxval_4: F-CONT(1942)=1.1E-10 fluxnum_5: 5 fluxval_5: F-CONT(2354)=7.3E-11 fluxnum_6: 6 fluxval_6: F-CONT(2536)=6.7E-11 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 5.000 targname: HD78316 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B wavelength: 1741.6 num_exp: 5 time_per_exp: 1108S s_to_n: 40 fluxnum_1: 2 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD req_1: CYCLE 1/5.000-9.000; req_2: SEQ 5.000-9.000 NO GAP ! linenum: 6.000 targname: HD78316 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B wavelength: 1849 num_exp: 3 time_per_exp: 1000S s_to_n: 40 fluxnum_1: 3 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD ! linenum: 7.000 targname: HD78316 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B wavelength: 1942 num_exp: 3 time_per_exp: 891S s_to_n: 60 fluxnum_1: 4 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD ! linenum: 8.000 targname: HD78316 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B wavelength: 2354 num_exp: 2 time_per_exp: 673S s_to_n: 70 fluxnum_1: 5 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD ! linenum: 9.000 targname: HD78316 config: HRS opmode: ACCUM aperture: 0.25 sp_element: ECH-B wavelength: 2540 num_exp: 1 time_per_exp: 1217S s_to_n: 70 fluxnum_1: 6 priority: 1 param_1: STEP-PATT=7, param_2: FP-SPLIT=STD ! linenum: 28.000 targname: HD78316 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 57.8S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: FAINT=1100, param_2: MAP=END-POINT, param_3: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 29.000; req_2: CYCLE 1/28.000-30.000; req_3: SEQ 28.000-30.000 NO GAP comment_1: STEP-TIME=0.2 SEC ! linenum: 29.000 targname: HD78316 config: HRS opmode: ACQ/PEAKUP aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 73.6S s_to_n: 10 fluxnum_1: 1 priority: 1 req_1: ONBOARD ACQ FOR 30.000,5-9 comment_1: STEP-TIME=1.6 SEC ! linenum: 30.000 targname: HD78316 config: HRS opmode: IMAGE aperture: 2.0 sp_element: MIRROR-A2 num_exp: 1 time_per_exp: 97S s_to_n: 10 fluxnum_1: 1 priority: 1 comment_1: TAKE MAP AFTER CENTERING ! ! end of exposure logsheet ! No scan data records found