! $Id: 4884,v 6.1 1994/07/27 14:56:04 pepsa Exp $ coverpage: title_1: HIGH SPEED ASTROMETRY - A SEARCH FOR PLANETARY COMPANIONS title_2: TO LOW-MASS STARS PART FOUR: CYCLE3 HIGH sci_cat: SOLAR SYSTEM proposal_for: GTO/AST longterm: 2 pi_title: DR. pi_fname: WILLIAM pi_mi: H. pi_lname: JEFFERYS pi_inst: UNIVERSITY OF TEXAS pi_country: USA pi_phone: (512)471-3000 keywords_1: FINE GUIDANCE SENSORS, FGS, STELLAR COMPANIONS, keywords_2: EXTRASOLAR PLANETS hours_pri: 35.00 num_pri: 6 fgs: Y pi_position: PROFESSOR ! end of coverpage abstract: line_1: We propose to test the hypothesis that jupiter-like planets line_2: are formed at distances from the primary dictated by the line_3: 'freezing' temperature of the volatiles which comprise jovian line_4: planets. Predicted periods for jovian planets orbiting this sample line_5: of very late-type, low-mass stars range from 70 to 160 days. line_6: We shall monitor the positions of these nearby late-M stars with line_7: a time-resolution of 4 to 10 days in an attempt to detect positional line_8: perturbations caused by possible jovian companions. Detection line_9: limits for these proposed targets lie between 0.4 and one Jupiter line_10: mass. ! ! end of abstract general_form_proposers: lname: JEFFERYS fname: WILLIAM title: DR. mi: H. inst: UNIVERSITY OF TEXAS country: USA ! lname: BENEDICT fname: GEORGE title: DR. mi: F. inst: UNIVERSITY OF TEXAS country: USA ! lname: DUNCOMBE fname: RAYNOR title: DR. mi: L. inst: UNIVERSITY OF TEXAS country: USA ! lname: HEMENWAY fname: PAUL title: DR. mi: D. inst: UNIVERSITY OF TEXAS country: USA ! lname: SHELUS fname: PETER title: DR. mi: S. inst: UNIVERSITY OF TEXAS country: USA ! lname: FRANZ fname: OTTO title: DR. mi: G. inst: LOWELL OBSERVATORY country: USA ! lname: FREDRICK fname: LAURENCE title: DR. mi: W. inst: UNIVERSITY OF VIRGINIA country: USA ! lname: VAN ALTENA fname: WILLIAM title: DR. mi: F. inst: YALE UNIVERSITY country: USA ! ! end of general_form_proposers block general_form_text: ! ! ! question: 3 section: 1 line_1: Acquire guide stars in the FGS units selected for guiding. line_2: Measure target, then reference stars, then target. line_3: Observations will be spaced 4 to 10 days over a time span of 100 to 250 days, line_4: depending on the target. Use FGS unit designated as Astrometry Prime. line_5: Cycle 0 = Exposures 13, 23 line_6: Cycle 1 = Exposures 13, 23, 33 ,45, 53, 63 line_7: Cycle 2 = Exposures 63 ! question: 4 section: 1 line_1: The minimum detectable mass depends directly on the accuracy line_2: of the positional measurements. Ground-based accuracies rarely exceed line_3: 50 milliarcseconds (mas). The assumed 2 mas accuracy of HST should line_4: let us detect 25 times less massive companions than from the ground. ! ! question: 13 section: 1 line_1: "High-Speed" Astrometry will be carried out on 6-8 low-mass stars in an line_2: effort to detect positional perturbations due to jovian planets. We assume line_3: that such planets will lie close to these low luminosity stars, and, hence, line_4: have fairly short orbital periods. Observations will be spaced 4 to 8 days line_5: apart. ! !end of general form text general_form_address: lname: JEFFERYS category: PI ! lname: BENEDICT fname: GEORGE mi: F. title: DR. category: CON addr_1: DEPARTMENT OF ASTRONOMY city: AUSTIN state: TX zip: 78712 country: USA phone: (512)471-3448 ! lname: JEFFERYS fname: WILLIAM mi: H. title: DR. category: PI inst: UNIVERSITY OF TEXAS addr_1: DEPARTMENT OF ASTRONOMY city: AUSTIN state: TX zip: 78712 country: USA phone: (512)471-1455 telex: TEXASTRO ! ! end of general_form_address records fixed_targets: targnum: 29 name_1: BARNARDS-STAR descr_1: A,139 pos_1: RA = 17H 55M 20.94S +/- 2", pos_2: DEC = +4D 39' 21.40" +/- 2" equinox: 1950.0 pm_or_par: Y pos_epoch_bj: B pos_epoch_yr: 1985.50 ra_pm_val: -0.049998 ra_pm_unct: 0.000669 dec_pm_val: 10.3100 dec_pm_unct: 0.0100 an_prlx_val: 0.5520 an_prlx_unct: 0.0050 fluxnum_1: 1 fluxval_1: V = 9.54 +/- 0.02 ! targnum: 30 name_1: BARNARD-GSC-1-REF descr_1: J,701 pos_1: RA = 269.47687D +/- 0.0003D, pos_2: DEC = +4.680570D +/- 0.0003D equinox: 2000.0 fluxnum_1: 1 fluxval_1: V = 13.26 +/- 0.6 ! targnum: 31 name_1: BARNARD-75-REF descr_1: J,701 pos_1: RA = 269.436264D +/- 0.0003D, pos_2: DEC = +4.690059D +/- 0.0003D equinox: 2000.0 fluxnum_1: 1 fluxval_1: V = 16.84 +/- 0.6 ! targnum: 32 name_1: BARNARD-81-REF descr_1: J,701 pos_1: RA = 269.437087D +/- 0.0003D, pos_2: DEC = +4.679343D +/- 0.0003D equinox: 2000.0 fluxnum_1: 1 fluxval_1: V = 15.5 +/- 0.6 ! targnum: 33 name_1: BARNARD-90-REF descr_1: J,701 pos_1: RA = 269.42924D +/- 0.0003D, pos_2: DEC = +4.666314D +/- 0.0003D equinox: 2000.0 fluxnum_1: 1 fluxval_1: V = 15.5 +/- 0.6 ! targnum: 34 name_1: BARNARD-GSC-2-REF descr_1: J,701 pos_1: RA = 269.456590D +/- 0.0003D, pos_2: DEC = +4.706910D +/- 0.0003D equinox: 2000.0 fluxnum_1: 1 fluxval_1: V = 14.52 +/- 0.6 ! targnum: 35 name_1: BARNARD-GSC-3-REF descr_1: J,701 pos_1: RA = 269.466480D +/- 0.0003D, pos_2: DEC = +4.705630D +/- 0.0003D equinox: 2000.0 fluxnum_1: 1 fluxval_1: V = 11.18 +/- 0.6 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 20.000 sequence_1: DEFINE sequence_2: SEQ21 targname: BARNARDS-STAR config: FGS opmode: POS aperture: PRIME sp_element: F583W num_exp: 1 time_per_exp: 10S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 req_3: SEQ 20-26 NON-INT; comment_1: AVOID TERMINATOR CROSSING ! linenum: 20.500 sequence_1: DEFINE sequence_2: SEQ21 targname: BARNARD-GSC-1-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: 52S s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 21.000 sequence_1: DEFINE sequence_2: SEQ21 targname: BARNARD-75-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ req_1: DO FOR TARG 31-33; comment_1: OBSERVE ONLY THOSE REFERENCE STARS comment_2: WITHIN THE ASTROMETRY PICKLE ! linenum: 22.000 sequence_1: DEFINE sequence_2: SEQ21 targname: BARNARDS-STAR config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: 10S s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 23.000 sequence_1: DEFINE sequence_2: SEQ21 targname: BARNARD-GSC-1-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: 52S s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 24.000 sequence_1: DEFINE sequence_2: SEQ21 targname: BARNARD-GSC-2-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ req_1: DO FOR TARG 34-35; comment_1: OBSERVE ONLY THOSE REFERENCE STARS comment_2: WITHIN THE ASTROMETRY PICKLE ! linenum: 25.000 sequence_1: DEFINE sequence_2: SEQ21 targname: BARNARD-GSC-1-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 26.000 sequence_1: DEFINE sequence_2: SEQ21 targname: BARNARDS-STAR config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: 10S s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 27.000 sequence_1: USE SEQ21 req_1: AT 24-MAR-94 +/- 4D; req_2: REPEAT 27 EVERY 16D +/- 2D FOR 16 MORE req_3: TIMES; req_4: CYCLE 4; comment_1: BREAK IN SERIES AVOIDS HST SUN comment_2: CONSTRAINTS ! ! end of exposure logsheet ! No scan data records found