! $Id: 5510,v 4.1 1994/07/27 18:47:07 pepsa Exp $ coverpage: title_1: MASS RATIO DETERMINATION FOR DOUBLES WITH SUBSTELLAR title_2: MASS MEMBERS CYCLE 4 - MEDIUM sci_cat: COOL STARS proposal_for: GO longterm: 3 pi_title: DR. pi_fname: LAURENCE pi_mi: G. pi_lname: TAFF pi_inst: STSCI pi_country: USA pi_phone: 410-338-4799 keywords_1: STELLAR MASSES, LOW MASS STARS keywords_2: DOUBLE STARS hours_pri: 5.70 num_pri: 1 fgs: Y pi_position: INSTR SCIENTIST ! end of coverpage abstract: line_1: Stellar masses which lie at or just below the stellar/ line_2: sub-stellar boundary are difficult to determine with certainty. line_3: Only binary stars with low luminosity members provide masses. line_4: In the best studied cases a significant source of line_5: uncertainty in the estimated masses is the blending of line_6: the light on the photographic plates used to record line_7: the stars' positions. The blending must be modelled in line_8: order to determine the locus of the center of mass. The line_9: position of the center of mass determines the mass ratio. line_10: Without knowing this, or the fraction of the total mass of line_11: the pair present in each component of the system, the line_12: uncertainty resulting from blending provides a point of line_13: attack for those who question the reality of ~ 0.05 solar line_14: mass estimates and thus not clearly sub-stellar or "brown line_15: dwarfs". We plan to resolve the pairs, measure orbital line_16: motion for mass ratio and determine individual masses line_17: with the help of orbital parameters which are well determined line_18: from ground-based work. ! ! end of abstract general_form_proposers: lname: TAFF fname: LAURENCE title: DR. mi: G. inst: STSCI country: USA ! lname: HERSHEY fname: JOHN title: DR. mi: L. inst: COMPUTER SCIENCE CORP AT STSCI country: USA ! ! end of general_form_proposers block general_form_text: ! ! ! ! ! question: 3 section: 1 line_1: Observe the target double star in POS and TRANS mode. Observe line_2: a field of reference stars in POS mode, return to the double line_3: and observe in TRANS and POS mode; all in Fine Lock guidance. ! question: 3 section: 2 line_1: POSitional Mode FGS Observations to establish a reference line_2: reference frame for each scientific target plus the line_3: TRANSfer Mode observations of the scientific targets for line_4: positions of binary components. Primary objective is measuring line_5: long-term orbital motion in a reference frame for individual line_6: mass determination. ! question: 4 section: 1 line_1: Speckle interferometry cannot provide the mass ratio and line_2: individual masses of these close pairs because it cannot line_3: provide the star positions in a reference frame of line_4: background stars. While speckle interferometry, and other line_5: forms of ground-based interferometry used on bright stars line_6: can resolve most of these systems, only position angle and line_7: distance are furnished. The absolute motion of the center of line_8: mass is not fixed because no other (i.e., reference) stars line_9: are observed when performing speckle work. Thus, the HST is line_10: not needed to observe these systems to compute the RELATIVE line_11: orbit; rather the HST is critical for computing the ABSOLUTE line_12: orbit. The HST Fine Guidance Sensors are uniquely capable line_13: of resolving these close, faint stars AND measuring line_14: background stars to provide a reference frame in which to line_15: determine the locus of the center of mass of the pairs. line_16: The HIPPARCOS mission is too short and unlikely to detect line_17: them as doubles. ! question: 5 section: 1 line_1: No real time observations requested. line_2: Scheduling requests are intended give a good range of parallax line_3: factors, but with broad time ranges in the requested intervals line_4: for ease of scheduling. ! ! !end of general form text general_form_address: lname: TAFF fname: LAURENCE mi: G. title: DR. category: PI addr_1: STSCI city: BALTIMORE state: MD zip: 21218 country: USA phone: (410)338-4767 ! lname: HERSHEY fname: JOHN mi: L. title: DR. inst: COMPUTER SCIENCE CORP. ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: L722-22 descr_1: A,141 pos_1: RA= 3.8640416D +/-0.00139D, pos_2: DEC=-16.1307D +/-0.00139D equinox: 2000 pm_or_par: Y pos_epoch_bj: J pos_epoch_yr: 1983.80 ra_pm_val: 0.045500 ra_pm_unct: 0.010000 dec_pm_val: -0.5950 dec_pm_unct: 0.0100 an_prlx_val: 0.1890 an_prlx_unct: 0.0050 comment_1: SCIENTIFIC TARGET fluxnum_1: 1 fluxval_1: V=12.62 +/- 0.5 ! targnum: 2 name_1: L722-22-0002-REF descr_1: J,701 pos_1: RA= 3.8676667D +/-0.00139D, pos_2: DEC=-16.1415272D +/-0.00139D equinox: 2000 pm_or_par: N comment_1: CLOSE REF STAR fluxnum_1: 1 fluxval_1: V=14.82 +/- 0.5 ! targnum: 3 name_1: L722-22-0003-REF descr_1: J,701 pos_1: RA= 3.8372500D +/-0.00139D, pos_2: DEC=-16.1202507D +/-0.00139D equinox: 2000 pm_or_par: N comment_1: CLOSE REF STAR fluxnum_1: 1 fluxval_1: V=14.10 +/- 0.5 ! targnum: 6 name_1: L722-22-0006-REF descr_1: J,701 pos_1: RA= 3.8183751D +/-0.00139D, pos_2: DEC=-16.1315002D +/-0.00139D, equinox: 2000 pm_or_par: N fluxnum_1: 1 fluxval_1: V=16.92 +/- 0.5 ! targnum: 7 name_1: L722-22-0007-REF descr_1: J,701 pos_1: RA= 3.9148333D +/-0.00139D, pos_2: DEC=-16.1189995D +/-0.00139D, equinox: 2000 pm_or_par: N fluxnum_1: 1 fluxval_1: V=16.32 +/- 0.5 ! targnum: 8 name_1: L722-22-0008-REF descr_1: J,701 pos_1: RA= 3.9035001D +/-0.00139D, pos_2: DEC=-16.0891666D +/-0.00139D, equinox: 2000 pm_or_par: N fluxnum_1: 1 fluxval_1: V=13.38 +/- 0.5 ! targnum: 9 name_1: L722-22-0009-REF descr_1: J,701 pos_1: RA= 3.9003334D +/-0.00139D, pos_2: DEC=-16.0824184D +/-0.00139D, equinox: 2000 pm_or_par: N fluxnum_1: 1 fluxval_1: V=16.38 +/- 0.5 ! targnum: 13 name_1: L722-22-0013-REF descr_1: J,701 pos_1: RA= 3.9290416D +/-0.00139D, pos_2: DEC=-16.1772499D +/-0.00139D, equinox: 2000 pm_or_par: N fluxnum_1: 1 fluxval_1: V=16.03 +/- 0.5 ! targnum: 14 name_1: L722-22-0014-REF descr_1: J,701 pos_1: RA= 3.9423335D +/-0.00139D, pos_2: DEC=-16.1177216D +/-0.00139D, equinox: 2000 pm_or_par: N fluxnum_1: 1 fluxval_1: V=16.25 +/- 0.5 ! targnum: 26 name_1: L722-22-0026-REF descr_1: J,701 pos_1: RA= 3.8276668D +/-0.00139D, pos_2: DEC=-16.2296124D +/-0.00139D, equinox: 2000 pm_or_par: N fluxnum_1: 1 fluxval_1: V=14.61 +/- 0.5 ! targnum: 27 name_1: L722-22-0027-REF descr_1: J,701 pos_1: RA= 3.7597084D +/-0.00139D, pos_2: DEC=-16.1507492D +/-0.00139D, equinox: 2000 pm_or_par: N fluxnum_1: 1 fluxval_1: V=16.48 +/- 0.5 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 req_1: SEQ 1-7 NON-INT; req_2: PCS FINE / 1-51; req_3: GROUP 1-15 NO GAP; ! linenum: 2.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 3.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 4.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22-0002-REF config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 120S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 5.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22-0003-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 6.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22-0002-REF config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 7.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 8.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: DATA-RATE=32 req_1: SEQ 8-15 NON-INT; req_2: GROUP-FGS 8-15 WITHIN 39M; comment_1: EXPECT 3 OF THE 5 -REF STARS comment_2: TO SCHEDULE...ADJUST THE 35M TO comment_3: MATCH THE TARGET VISIBILITY comment_4: PERIOD ! linenum: 9.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22-0006-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 10.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22-0007-REF config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 11.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22-0008-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 12.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22-0009-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 13.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22-0014-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 14.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 15.000 sequence_1: DEFINE sequence_2: LSEQ01 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 16.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 req_1: SEQ 16-22 NON-INT; req_2: GROUP 16-29 NO GAP; ! linenum: 17.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 18.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 19.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22-0002-REF config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 120S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 20.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22-0003-REF config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 120S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 21.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22-0002-REF config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 22.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 23.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22 config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: DATA-RATE=32 req_1: SEQ 23-29 NON-INT; req_2: GROUP-FGS 23-29 WITHIN 39M; comment_1: EXPECT 3 OF THE 5 -REF STARS comment_2: TO SCHEDULE...ADJUST THE 35M TO comment_3: MATCH THE TARGET VISIBILITY comment_4: PERIOD ! linenum: 24.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22-0006-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 25.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22-0007-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: LSEQ02 targname: L722-22-0014-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 27.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22-0013-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 28.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 29.000 sequence_1: DEFINE sequence_2: LSEQ02 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 30.000 sequence_1: DEFINE sequence_2: LSEQ03 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 req_1: SEQ 30 - 36 NON-INT; ! linenum: 31.000 sequence_1: DEFINE sequence_2: LSEQ03 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 32.000 sequence_1: DEFINE sequence_2: LSEQ03 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 33.000 sequence_1: DEFINE sequence_2: LSEQ03 targname: L722-22-0002-REF config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 120S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 34.000 sequence_1: DEFINE sequence_2: LSEQ03 targname: L722-22-0003-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 35.000 sequence_1: DEFINE sequence_2: LSEQ03 targname: L722-22-0002-REF config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 36.000 sequence_1: DEFINE sequence_2: LSEQ03 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 45.000 sequence_1: DEFINE sequence_2: LSEQ04 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 req_1: SEQ 45- 51 NON-INT; ! linenum: 46.000 sequence_1: DEFINE sequence_2: LSEQ04 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 47.000 sequence_1: DEFINE sequence_2: LSEQ04 targname: L722-22 config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 48.000 sequence_1: DEFINE sequence_2: LSEQ04 targname: L722-22-0002-REF config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 120S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 49.000 sequence_1: DEFINE sequence_2: LSEQ04 targname: L722-22-0003-REF config: ^ opmode: ^ aperture: ^ sp_element: ^ num_exp: ^ time_per_exp: ^ s_to_n: ^ fluxnum_1: ^ priority: ^ param_1: ^ ! linenum: 50.000 sequence_1: DEFINE sequence_2: LSEQ04 targname: L722-22-0002-REF config: FGS opmode: TRANS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 225S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 param_2: STEP-SIZE=1.0 param_3: SCANS=8 ! linenum: 51.000 sequence_1: DEFINE sequence_2: LSEQ04 targname: L722-22 config: FGS opmode: POS aperture: 3 sp_element: F583W num_exp: 1 time_per_exp: 60S s_to_n: 10 fluxnum_1: 1 priority: 1 param_1: DATA-RATE=32 ! linenum: 59.000 sequence_1: USE LSEQ01 req_1: AT 15-JUN-94 +/- 26D; req_2: CYCLE 4 / 59-62 comment_1: ONE OF FOUR INTERVALS COVERING comment_2: THE USABLE PART OF THE OF THE comment_3: PARALLACTIC ELLIPSE AND SEP- comment_4: ARATED BY ABOUT 2 WEEKS. ! linenum: 60.000 sequence_1: USE LSEQ02 req_1: AT 19-AUG-94 +/- 26D; comment_1: ONE OF FOUR INTERVALS COVERING comment_2: THE USABLE PART OF THE OF THE comment_3: PARALLACTIC ELLIPSE AND SEP- comment_4: ARATED BY ABOUT 2 WEEKS. ! linenum: 61.000 sequence_1: USE LSEQ03 req_1: AT 26-OCT-94 +/- 26D; comment_1: ONE OF FOUR INTERVALS COVERING comment_2: THE USABLE PART OF THE OF THE comment_3: PARALLACTIC ELLIPSE AND SEP- comment_4: ARATED BY ABOUT 2 WEEKS. ! linenum: 62.000 sequence_1: USE LSEQ04 req_1: AT 27-DEC-94 +/- 26D; comment_1: ONE OF FOUR INTERVALS COVERING comment_2: THE USABLE PART OF THE OF THE comment_3: PARALLACTIC ELLIPSE AND SEP- comment_4: ARATED BY ABOUT 2 WEEKS. ! ! end of exposure logsheet ! No scan data records found