! $Id: 5316,v 8.1 1995/02/21 14:34:04 pepsa Exp $ coverpage: title_1: MASSES OF PREMAIN SEQUENCE STARS CYC4MEDIUM sci_cat: COOL STARS sci_subcat: EARLY EVOLUTION proposal_for: GO longterm: 3 pi_fname: MICHAL pi_lname: SIMON pi_inst: SUNY STONY BROOK pi_country: USA hours_pri: 7.37 num_pri: 10 fgs: Y off_fname: KATHERINE off_mi: L. off_lname: MACCORMACK off_title: SPONS. PROG. ASSOC. off_inst: 2988 off_addr_1: OFFICE OF RESEARCH SERVICES off_addr_2: RESEARCH FOUNDATION off_addr_3: W-5510 LIBRARY off_city: STONY BROOK off_state: NY off_zip: 11794 off_country: USA off_phone: (516)-632-9039 ! end of coverpage abstract: line_1: We propose to determine the masses of pre-main sequence binaries line_2: selected from our lunar occultation survey of the Taurus star-forming line_3: region. We plan to use the Fine Guidance Sensors to measure the line_4: apparent orbits of the binaries. Since the distance to the region is line_5: known the apparent orbits will yield the total masses of the binaries. line_6: This proposal is for the third year continuation for our program line_7: previously approved for Cycles 2 and 3. No data has been taken yet line_8: so we can only summarize our goals and plans. The first observations line_9: are scheduled for September and October 1993. We will use those line_10: results to update the target list as described in Question 4. ! ! end of abstract general_form_proposers: lname: SIMON fname: MICHAL inst: 2988 country: USA esa: N ! lname: TAFF fname: LAURENCE mi: G. inst: 3470 country: USA esa: N ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: This program requires the FGS Interferometers operating in Transfer line_2: Function Mode. We plan to use the clear filter to take advantage line_3: of the red spectra of the stars and the S20 response of the FGS line_4: photomultipliers and to use the 2/3 aperture stop to achieve the line_5: best signal-to-noise ratio. line_6: For binary orbit determination we require that a given system be line_7: observed twice per Cycle, as far apart in time as possible. The line_8: hierarchical triple HV Tau will require two observations: one of line_9: the close components and the second with the full 5 X 5 arc sec line_10: aperture of the close components relative to the third component. line_11: Our Cycle 2 observations are, at this writing, scheduled for line_12: September, 1993 and late October, 1993. They will be directed at line_13: the targets originally proposed: DF, DI, FF, HQ, HV, and GN Tau. line_14: In Cycles 3 and 4 we will DELETE from the original target list those line_15: systems found by Cycle 2 observations to be unsuitable for orbit line_16: determination and to REPLACE them by ZZ Tau, HK Tau G2, Elias 12, line_17: and SVS 1849 (as described in our approved Cycle 3 proposal). ! question: 4 section: 1 line_1: The results of our ground-based survey (refs. 4 and 7) by lunar line_2: occultations and imaging provide the source list for this program. line_3: Lunar occultations of a given object occur infrequently so orbit line_4: determination by ground-based occultation observations is not line_5: practical. Moreover, the components of the binaries we propose line_6: for FGS observation are too close to be resolvable by IR speckle line_7: interferometry, and too close and too faint to be observed by line_8: visible light speckle interferometry. The systems considered here line_9: are simply too faint for the present generation of ground-based line_10: Michelson interferometers operating in the visible and IR. ! question: 5 section: 1 line_1: The Taurus Star Forming Region is a dark cloud so line_2: the surface density of potential Guide Stars is low. Finding suitable line_3: Guide Stars for our targets has proved to line_4: be a problem and has delayed the scheduling of our Cycle 2 line_5: observations. An additional complication is that, as noted in line_6: Question 3, we need to observe our targets as far apart line_7: in time as possible to facilitate orbit determination. For the line_8: targets scheduled for observations in late 1993 (DF Tau, DI Tau, line_9: FF Tau, GN Tau, HQ Tau, HV Tau and HV Tau/C), Denise Taylor of line_10: the STScI staff has determined that Guide Stars are available in the line_11: interval aproximately Days 240 to 300. The Guide Star problem may line_12: arise again for the new objects, ZZ Tau, HK Tau G2, Elias 12, and line_13: SVS 1849 that we may introduce as replacements in Cycle 4 (see line_14: Question 3). We note this now to alert the STScI staff and to ask line_15: that we be notified as soon as the problem arises. ! ! question: 9 section: 1 line_1: MS (PI) and LGT (Co-I) are the investigators for the HST program line_2: "Masses of Pre-Main sequence Stars", approved for 3 years, line_3: assigned time as GO 3842 and GO 4789 in Cycle 2, and as GO 4568 line_4: for Cycle 3. The present proposal is the continuation request line_5: for the third cycle, Cycle 4. The Cycle 2 observations are line_6: scheduled for Sept., 1993 and late October, 1993. line_7: LGT participated in the data reduction of SAO observations 3004 line_8: and was a Co-I on the engineering proposal 3368. ! question: 10 section: 1 line_1: The SUNY SB Astronomy Group maintains a cluster of VMS and Ultrix line_2: workstations that operate the usual arsenal of astronomical line_3: software. MS draws on the expertise of Frederick Walter (a member line_4: of the GHRS team) for HST-related advice and Deane Peterson for line_5: advice pertaining to binary star analysis. MS has regularly guided line_6: PhD students and plans to involve a graduate student in this line_7: work. LGT has full access to the software required for working line_8: with FGS data. ST provides support of Taff's research time and line_9: computing needs. ! !end of general form text general_form_address: lname: SIMON fname: MICHAL category: PI inst: 2988 addr_1: ASTRONOMY PROGRAM addr_2: DEPT. OF EARTH AND SPACE SCIENCES addr_3: STATE UNIV. OF NEW YORK city: STONY BROOK state: NY zip: 11794 country: USA phone: (516)-632-8226 telex: MSIMON@SBAST1.ESS.SUNYSB.EDU ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: DF-TAU name_2: GSC1820 descr_1: A,156,141 pos_1: RA = 4H 27M 02.80S +/- 0.1S, pos_2: DEC = 25D 42' 23.11" +/- 0.1", pos_3: PLATE-ID= 000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=12.6 +/- 1.0 fluxnum_2: 1 fluxval_2: B-V=0.5 +/- 0.2 ! targnum: 2 name_1: DI-TAU name_2: GSC1837 descr_1: A,156,141 pos_1: RA = 4H 29M 42.49S +/- 0.1S, pos_2: DEC = 26D 32' 49.55" +/-0.1", pos_3: PLATE-ID=000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=12.8 +/- 1.0 fluxnum_2: 1 fluxval_2: B-V=1.6 +/- 0.2 ! targnum: 3 name_1: FF-TAU name_2: GSC1829 descr_1: A,156,139 pos_1: RA = 4H 35M 20.87S +/- 0.1S, pos_2: DEC = 22D 54' 24.69" +/- 0.1", pos_3: PLATE-ID=000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=14.3 +/- 1.0 fluxnum_2: 1 fluxval_2: B-V=1.5 +/- 0.2 ! targnum: 4 name_1: HQ-TAU name_2: GSC1829 descr_1: A,156 pos_1: RA = 4H 35M 47.30S +/- 0.1S, pos_2: DEC = 22D 50' 22.18" +/- 0.1", pos_3: PLATE-ID=000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=12.6 +/- 1.0 fluxnum_2: 1 fluxval_2: B-V=1.3 +/- 0.2 ! targnum: 5 name_1: HV-TAU name_2: GSC1834 descr_1: A,156,141 pos_1: RA = 4H 38M 35.27S +/- 0.1S, pos_2: DEC = 26D 10' 38.90" +/- 0.1", pos_3: PLATE-ID=000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=14.3 +/- 1.0 fluxnum_2: 1 fluxval_2: B-V=1.3 +/- 0.2 ! targnum: 6 name_1: HV-TAU-C descr_1: A,156,141 pos_1: RA-OFF = 0.15S +/- 0.1S, pos_2: DEC-OFF = 2" +/- 0.1", pos_3: FROM 5 equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 comment_1: THIS POSITION IS 2" NE FROM #5 comment_2: IT IS HALFWAY TO A COMPANION 4" comment_3: FROM HV-TAU. THERE IS NO STAR comment_4: ACTUALLY AT THIS POS. fluxnum_1: 1 fluxval_1: V=14.3 +/- 1.0 fluxnum_2: 1 fluxval_2: B-V=1.3 +/- 0.2 ! targnum: 7 name_1: GN-TAU name_2: GSC1834 descr_1: A,156 pos_1: RA = 4H 39M 20.90S +/- 0.1S, pos_2: DEC = 25D 45' 02.8" +/- 0.1", pos_3: PLATE-ID=000L equinox: 2000 pos_epoch_bj: J fluxnum_1: 1 fluxval_1: V=15.7 +/- 1.0 fluxnum_2: 1 fluxval_2: B-V=0.9 +/- 0.2 ! targnum: 8 name_1: ZZ-TAU name_2: GSC1833 descr_1: A,156,141 pos_1: RA = 4H 30M 51.39S +/- 0.1S, pos_2: DEC = 24D 42' 22.5" +/- 0.1", pos_3: PLATE-ID= 000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=14.3 +/- 1.0 fluxnum_2: 1 fluxval_2: B-V=1.5 +/- 0.2 ! targnum: 9 name_1: HK-TAU-G2 name_2: GSC1829 descr_1: A,156,141 pos_1: RA = 4H 32M 18.88S +/- 0.1S, pos_2: DEC = 24D 22' 27.2" +/-0.1", pos_3: PLATE-ID=000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=13.7 +/- 1.0 fluxnum_2: 1 ! targnum: 10 name_1: ELIAS-12 name_2: GSC1829 descr_1: A,156,139 pos_1: RA = 4H 33M 6.62S +/- 0.1S, pos_2: DEC = 24D 9' 55.2" +/- 0.1", pos_3: PLATE-ID=000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=11.2 +/- 1.0 fluxnum_2: 1 ! targnum: 11 name_1: SVS-1849 name_2: GSC1829 descr_1: A,156 pos_1: RA = 4H 33M 23.65S +/- 0.1S, pos_2: DEC = 23D 59' 27.7" +/- 0.1", pos_3: PLATE-ID=000L equinox: 2000 pos_epoch_bj: J pos_epoch_yr: 2000.00 fluxnum_1: 1 fluxval_1: V=12.3 +/- 1.0 fluxnum_2: 1 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 1.000 sequence_1: DEFINE sequence_2: BINOBS targname: # config: FGS opmode: TRANS aperture: 3 sp_element: PUPIL num_exp: 1 time_per_exp: 600S fluxnum_1: 1 priority: 1 param_1: DATA-RATE = 32, param_2: STEP-SIZE = 0.3, param_3: SCANS = 10 ! linenum: 2.000 sequence_1: USE BINOBS targname: DF-TAU time_per_exp: X1.5 req_1: AT 17-FEB-1995 +/- 30D; req_2: CYCLE 4 / 2-19.5; ! linenum: 6.000 sequence_1: USE BINOBS targname: HV-TAU req_1: GROUP 6-7 NO GAP; req_2: AT 8-SEP-1994 +/- 4D; ! linenum: 7.000 sequence_1: USE BINOBS targname: HV-TAU-C ! linenum: 8.000 sequence_1: USE BINOBS targname: GN-TAU req_1: AT 25-AUG-1994 +/- 10D; ! linenum: 9.000 sequence_1: USE BINOBS targname: DF-TAU req_1: GROUP 9-15 WITHIN 10D; req_2: AT 27-OCT-1994 +/- 4D; ! linenum: 13.000 sequence_1: USE BINOBS targname: HV-TAU req_1: GROUP 13-14 NO GAP; ! linenum: 14.000 sequence_1: USE BINOBS targname: HV-TAU-C ! linenum: 15.000 sequence_1: USE BINOBS targname: GN-TAU ! linenum: 16.000 sequence_1: USE BINOBS targname: ZZ-TAU ! linenum: 16.500 sequence_1: USE BINOBS targname: ZZ-TAU time_per_exp: X1.5 req_1: AFTER 16.0 BY 120D +/- 15D; ! linenum: 17.000 sequence_1: USE BINOBS targname: HK-TAU-G2 ! linenum: 17.500 sequence_1: USE BINOBS targname: HK-TAU-G2 time_per_exp: X1.5 req_1: AFTER 17.0 BY 120D +/- 15D; ! linenum: 18.000 sequence_1: USE BINOBS targname: ELIAS-12 ! linenum: 18.500 sequence_1: USE BINOBS targname: ELIAS-12 req_1: AFTER 18.0 BY 180D +/- 20D; ! linenum: 19.000 sequence_1: USE BINOBS targname: SVS-1849 req_1: COND IF A PREVIOUS TARGET IS DROPPED; ! linenum: 19.500 sequence_1: USE BINOBS targname: SVS-1849 req_1: AFTER 19.0 BY 180D +/- 20D; req_2: COND IF A PREVIOUS TARGET IS DROPPED; ! ! end of exposure logsheet ! No scan data records found