! $Id: 5382,v 4.1 1994/07/27 17:20:43 pepsa Exp $ coverpage: title_1: BORON AS A PROBE OF THE FORMATION OF THE GALACTIC HALO, title_2: AND OF PRIMORDIAL NUCLEOSYNTHESIS; CYCLE4 MEDIUM sci_cat: COOL STARS sci_subcat: EVOLUTION/COSMOLOGY proposal_for: GO pi_fname: DOUGLAS pi_mi: K. pi_lname: DUNCAN pi_inst: 1710 pi_country: USA pi_phone: 312-702-8207 hours_pri: 33.88 num_pri: 1 hrs: Y off_fname: JOYCE off_lname: FREEDMAN off_title: ASSOC. VP. RESEARCH off_inst: 1710 off_addr_1: 970 E. 58TH ST. off_city: CHICAGO off_state: IL off_zip: 60637 off_country: USA off_phone: 312-702-8604 ! end of coverpage abstract: line_1: We propose to observe boron in 3 halo stars of extremely low metallicity line_2: (\[Fe/H\] = -3.1 to -3.5) and combine this data with our ground-based line_3: measurements of Be and Li. The evolution of Li, Be, and B has now been line_4: shown to be a powerful descriminant between different models of the chemical line_5: and dynamical evolution of the galaxy, and must be added to the evolution of line_6: \[Fe/H\] and \[O/H\] as the critical test of such models. Light element line_7: production depends on the intensity and shape of the cosmic ray spectrum, which line_8: in turn depends on the supernova rate and thus the star formation rate. It also line_9: depends on the rise of the (progenitor) CNO abundances, and the decline of line_10: the gas mass fraction, which is affected by rates of infall of fresh line_11: (unprocessed) material and outflow, e.g. by supernova heating. The greater line_12: efficiency of the post-COSTAR HST will allow us to probe more metal-poor line_13: stars than previously observed, so that we can study the earliest phases of line_14: formation of the halo. Already the first HST observations of B in halo stars line_15: CANNOT BE MATCHED by existing models of galactic chemical evolution. line_16: -- In addition, the search for primordial B and Be in the most metal-poor line_17: stars allows discriminating between standard and inhomogeneous big line_18: bang nucleosynthesis models. Pushing the search for a "plateau" in B and Be line_19: (similar to the plateau which demonstrates the cosmological origin of Li) to line_20: more metal-poor stars constrains the possiblities of nonstandard models. ! ! end of abstract general_form_proposers: lname: DUNCAN fname: DOUGLAS mi: K. inst: 1710 country: USA ! lname: BOESGAARD fname: ANN mi: M. inst: UNIVERSITY OF HAWAII/PENN STATE UNIVERSITY country: USA ! lname: DELIYANNIS fname: CONSTANTINE mi: P. inst: 2190 country: USA ! lname: HOBBS fname: LEWIS mi: M. inst: 1716 country: USA ! lname: KING fname: JEREMY mi: R. inst: 2190 country: USA ! lname: RYAN fname: SEAN mi: G. inst: 4140 country: AUSTRALIA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: GHRS observations will be made of a single star using the G270M line_2: grating (SSA aperture) centered at 2500A, the wavelength of the line_3: B resonance lines. Following TAC recommendation, all exp. time line_4: will be devoted to one star; a S/N approaching 200 will line_5: sought. The exp's will be broken into 3 parts of slightly line_6: different wavelength, to get better S/N by using different line_7: parts of the photocathode. The initial target acq is specified line_8: as 5 x 5 search, for safety with this object which shows PM. line_9: It is followed by TWO ACQ/PEAKs in the SSA (for best centering). line_10: Exposures are each 30 min. long; with FP-SPLIT that means the line_11: individual parts are 7.5 min. long, within the 5-10 min. max. line_13: recommended. Every 8 hrs. exposure time, a new ACQ/PEAKUP is line_14: done and the central wavelength slightly shifted. ! question: 3 section: 2 line_1: ! question: 4 section: 1 line_1: The only boron lines observable in late-type stars are in line_2: the UV (2500A) and CANNOT be observed from the ground. line_3: Cannot get nearly enough S/N from IUE to determine accurate line_4: abundances since the expected line is very weak. ! question: 5 section: 1 line_1: None. ! question: 6 section: 1 line_1: None ! ! question: 8 section: 1 line_1: ! question: 9 section: 1 line_1: Duncan and many of the Co-Is have participated (or are in the line_2: midst of) these previous proposals analyzing B abundances: line_3: 2634. Duncan, PI. "Boron and Be as probes of Cosmic Ray line_4: Spallation..." 3614. Duncan, PI "Boron as a Probe of Stellar line_5: Structure and Mass Loss." 4510. Duncan, PI. "The Evolution of line_6: Boron -Implications for Galactic Evolution and Cosmology. line_7: Hobbs has participated in three unrelated proposals and Duncan line_8: one. ! question: 10 section: 1 line_1: Normal office and secretarial support is provided to the PI line_2: and Co-Is by their institutions. The spectrum synthesis program line_3: will be run on a workstations at the University of Chicago which line_4: were funded out of previous HST grants. ! !end of general form text general_form_address: lname: DUNCAN fname: DOUGLAS mi: K category: PI inst: 1710 addr_1: Dept.of Astron. and Astrophys. addr_2: 5640 S. Ellis Ave. city: CHICAGO state: IL zip: 60637 country: USA phone: 312-702-8207 telex: duncan@oddjob.uchicago.edu ! lname: DUNCAN fname: DOUGLAS mi: K category: CON inst: 1710 addr_1: ALTERNATE (SECONDARY) ADDRESS addr_2: ADLER PLANETARIUM city: CHICAGO state: IL zip: 60605 country: USA phone: 312-322-0316 telex: 312-322-2257 ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: BD-13D3442 name_2: GSC5523-1415 descr_1: A,134,911 pos_1: PLATE-ID=03YF, pos_2: RA = 11H 46M 50.62S +/- 0.1S, pos_3: DEC = -14D 06' 39.4" +/- 1" equinox: J2000 pm_or_par: Y pos_epoch_bj: J pos_epoch_yr: 1983.36 ra_pm_val: 0.001600 dec_pm_val: -0.2050 fluxnum_1: 1 fluxval_1: V = 10.2, TYPE=SDF fluxnum_2: 2 fluxval_2: B-V = 0.39 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 targname: BD-13D3442 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 15.0S s_to_n: 50 s_to_n_time: .2S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 param_2: BRIGHT=RETURN req_1: ONBOARD ACQ FOR 1.1; CYCLE 4 comment_1: STEP-TIME=0.6S ! linenum: 1.100 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 1.2; CYCLE 4 comment_1: STEP-TIME=1.6S ! linenum: 1.200 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 1.3-1.5; CYCLE 4 comment_1: THE SECOND ACQ/PEAK IS INTENTIONAL, comment_2: TO START WITH BEST POSSIBLE CENTERING ! linenum: 1.300 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2494 num_exp: 3 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 1.400 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2494 num_exp: 3 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 1.500 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2494 num_exp: 4 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 2.000 targname: BD-13D3442 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 15.0S s_to_n: 50 s_to_n_time: .2S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 param_2: BRIGHT=RETURN req_1: ONBOARD ACQ FOR 2.1; CYCLE 4 comment_1: STEP-TIME=0.6S ! linenum: 2.100 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 2.2; CYCLE 4 comment_1: STEP-TIME=1.6S ! linenum: 2.200 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 2.3-2.5; CYCLE 4 comment_1: STEP-TIME=1.6S, comment_2: NEW ACQ/PEAK FOR SAFETY ! linenum: 2.300 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2494 num_exp: 3 time_per_exp: 30M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 2.400 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2494 num_exp: 3 time_per_exp: 30M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 2.500 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2494 num_exp: 3 time_per_exp: 30M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 3.000 targname: BD-13D3442 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 15.0S s_to_n: 50 s_to_n_time: .2S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 param_2: BRIGHT=RETURN req_1: ONBOARD ACQ FOR 3.1; CYCLE 4 comment_1: STEP-TIME=0.6S ! linenum: 3.100 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 3.2; CYCLE 4 comment_1: STEP-TIME=1.6S ! linenum: 3.200 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 3.3-3.5; CYCLE 4 comment_1: NEW ACQ/PEAK FOR SAFETY, ! linenum: 3.300 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2497 num_exp: 3 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED, comment_2: SLIGHT WAVELENGTH SHIFT ! linenum: 3.400 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2497 num_exp: 3 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED, comment_2: SLIGHT WAVELENGTH SHIFT ! linenum: 3.500 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2497 num_exp: 4 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED, comment_2: SLIGHT WAVELENGTH SHIFT ! linenum: 4.000 targname: BD-13D3442 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 15.0S s_to_n: 50 s_to_n_time: .2S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 param_2: BRIGHT=RETURN req_1: ONBOARD ACQ FOR 4.1; CYCLE 4 comment_1: STEP-TIME=0.6S ! linenum: 4.100 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 4.2; CYCLE 4 comment_1: STEP-TIME=1.6S ! linenum: 4.200 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 4.3-4.5; CYCLE 4 comment_1: NEW ACQ/PEAK FOR SAFETY ! linenum: 4.300 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2497 num_exp: 3 time_per_exp: 30M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 4.400 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2497 num_exp: 3 time_per_exp: 30M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 4.500 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2497 num_exp: 3 time_per_exp: 30M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 5.000 targname: BD-13D3442 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 15.0S s_to_n: 50 s_to_n_time: .2S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 param_2: BRIGHT=RETURN req_1: ONBOARD ACQ FOR 5.1; CYCLE 4 comment_1: STEP-TIME=0.6S ! linenum: 5.100 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 5.2; CYCLE 4 comment_1: STEP-TIME=1.6S ! linenum: 5.200 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 5.3-5.5; CYCLE 4 comment_1: NEW ACQ/PEAK FOR SAFETY ! linenum: 5.300 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2502 num_exp: 3 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED, comment_2: SLIGHT WAVELENGTH SHIFT ! linenum: 5.400 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2502 num_exp: 3 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED, comment_2: SLIGHT WAVELENGTH SHIFT ! linenum: 5.500 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2502 num_exp: 4 time_per_exp: 28M s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED, comment_2: SLIGHT WAVELENGTH SHIFT ! linenum: 6.000 targname: BD-13D3442 config: HRS opmode: ACQ aperture: 2.0 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 15.0S s_to_n: 50 s_to_n_time: .2S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 param_2: BRIGHT=RETURN req_1: ONBOARD ACQ FOR 6.1; CYCLE 4 comment_1: STEP-TIME=0.6S ! linenum: 6.100 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 6.2; CYCLE 4 comment_1: STEP-TIME=1.6S ! linenum: 6.200 targname: BD-13D3442 config: HRS opmode: ACQ/PEAKUP aperture: 0.25 sp_element: MIRROR-N2 num_exp: 1 time_per_exp: 40S s_to_n: 50 s_to_n_time: 1.6S fluxnum_1: 1 priority: 1 param_1: SEARCH-SIZE=5 req_1: ONBOARD ACQ FOR 6.3-6.5; CYCLE 4 comment_1: NEW ACQ/PEAK FOR SAFETY ! linenum: 6.300 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2502 num_exp: 3 time_per_exp: 1900S s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 6.400 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2502 num_exp: 3 time_per_exp: 1900S s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! linenum: 6.500 targname: BD-13D3442 config: HRS opmode: ACCUM aperture: 0.25 sp_element: G270M wavelength: 2502 num_exp: 3 time_per_exp: 1900S s_to_n: 100 s_to_n_time: 8H fluxnum_1: 1 priority: 1 param_1: STEP-PATT=DEF param_2: FP-SPLIT=STD req_1: CYCLE 4 comment_1: QUARTER-STEPPED ! ! end of exposure logsheet ! No scan data records found