! $Id: 5474,v 16.1 1994/10/05 18:05:15 pepsa Exp $ ! Date: Tue, 8 Mar 94 11:45:37 EST ! From: Max Mutchler ! Subject: additional revisions from Paola Sartoretti ! affecting # of exposures, exposure times, coordinates, ORIENTs ! coverpage: title_1: THE SEARCH FOR SUPERPLANETS AROUND WEAK T-TAURI STARS:TEST EXPOS sci_cat: COOL STARS sci_subcat: FAINT COMPANIONS proposal_for: GO pi_fname: ROBERT pi_mi: A. pi_lname: BROWN pi_inst: STSCI pi_country: USA pi_phone: 410-516-8129 hours_pri: 1.90 num_pri: 11 wf_pc: Y off_fname: ROBERT off_lname: WILLIAMS off_title: DIRECTOR off_inst: STSCI off_addr_1: 3700 SAN MARTIN DRIVE off_city: BALTIMORE off_state: MD off_zip: 21218 off_country: USA off_phone: 410-516-4710 ! end of coverpage abstract: line_1: This project is a search for 'superplanets' around selected pre-main line_2: sequence stars in I band using Planetary Camera II. The superplanets line_3: will be detected in their intrinsic thermal radiation. The detectability line_4: factors are stellar age and spectral type, and mass and semi-major line_5: orbital axis of the superplanet. Because of the superb peak-to-wing ratio line_6: of its point spread function after spherical aberration is corrected, line_7: HST is uniquely capable of performing this survey and determining the line_8: statistical occurrence of superplanets. ! ! end of abstract general_form_proposers: lname: BROWN fname: ROBERT mi: A. inst: 3470 country: USA ! lname: SARTORETTI fname: PAOLA inst: STSCI country: USA ! ! end of general_form_proposers block general_form_text: question: 3 section: 1 line_1: On each target star, we will obtain PC frames at each line_2: of two spacecraft rotations, and each frame will have 9 exposures line_3: (dwell points) with the star positioned at grid points in a line_4: pattern. All exposures of one star must be obtained within one line_5: day. We understand this will involve multiple scheduling line_6: units to implement. line_7: Because the two spacecraft rotations must be separated by a line_8: fairly large angle--minimum of 18 deg--the first orientation line_9: should probably be at an off-nominal roll angle line_10: to assure the feasibility of the second rotation, line_11: which will be off-nominal in the other direction, but by a line_12: lesser amount than if the first rotation were nominal. The line_13: absolute position angle on the sky is irrelevant. line_14: We need to obtain 9 exposures for each PC1 frame in a 3x3 pattern. line_15: The spacing between the repeated images should be 8", and the line_16: shutter should be closed between exposures. line_17: Each target should be acquired at 2 roll angles differing by line_18: 20 degrees +/- 1 degree. The rotated exposures should be obtained line_19: within one day of the first exposures and the rotation line_20: can be either a + or a - rotation of 20 degrees. line_21: The exposure times (dwell times) were computed to detect a line_22: superplanet with flux 2.5 PH/S at 9000A at a distance of 0.3" line_23: from the target star. ! question: 4 section: 1 line_1: The search of superplanets will be performed in the Taurus-Auriga star line_2: forming complex. The superplanets will be detected in their intrinsic line_3: thermal radiation. The detectability factors are the age and spectral line_4: type of the star, and the mass and semi-major orbital axis of the line_5: superplanet. Because of the superb peak-to-wing ratio of its PSF after line_6: spherical aberration is corrected, HST is uniquely capable of performing line_7: this survey and determining the statistical occurrence of superplanets line_8: around pre main sequence stars down to a distance of about 0.3". We are line_9: acutely aware that this search is at the cutting edge of what is line_10: technically feasible with HST and may be subject to systematic errors. line_11: Neverthless, based on our long experience with HST optical issue, with line_12: the problem of direct planet detection, and with similar data sets at line_13: infrared wavelengths, we have confidence in this project. ! question: 5 section: 1 line_1: We want to obtain 2 frames within 1 day with an ORIENT offset of line_2: 20 degrees between the two. The first observations should be line_3: sought in off-nominal rolls to increase the availability of line_4: guide stars pairs for both orientations. We do want the same line_5: guide star pair if possible. ! ! question: 9 section: 1 line_1: The previous HST work is unrelated to this proposal. line_2: The program was GO 4353 - Hubble Space Telescope Imaging of Io, line_3: M.McGrath, P.Sartoretti, F.Paresce, J.T.Clarke, J.R.Spencer, line_4: A.S. McEwen. line_5: The publications resulting from previous HST data are: line_6: Near UV Imaging of Io with the Hubble Space Telescope, F.Paresce, line_7: P.Sartoretti, et al., Astronomy and Astrophisics, 262, 617, 1992. line_8: Disk-resolved Imaging of Io with the Hubble Space Telescope, line_9: P.Sartoretti, M.McGrath, F.Paresce, submitted to Icarus, May 1993. ! question: 10 section: 1 line_1: Workstations, and extensive software and technical support are line_2: provided by the home institution of the PI. ! !end of general form text general_form_address: lname: Brown fname: Robert mi: A. category: PI inst: STSCI addr_1: 3700 San Martin Drive city: Baltimore state: MD zip: 21218 country: USA phone: 410-516-8129 telex: scivax::rbrown (SPAN) ! ! end of general_form_address records fixed_targets: targnum: 1 name_1: HBC347 descr_1: A,156 pos_1: RA = 03H 29M 38.359S +/- 0.1S, pos_2: DEC = +24D 30' 38.48" +/- 1.0" equinox: 2000 fluxnum_1: 1 fluxval_1: V=12.05 +/- 0.01, TYPE=K1 fluxnum_2: 2 fluxval_2: I=11.01 +/- 0.01 ! ! end of fixed targets ! No solar system records found ! No generic target records found exposure_logsheet: linenum: 120.000 targname: HBC347 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F785LP num_exp: 1 time_per_exp: 72S s_to_n: 5 s_to_n_time: 210S fluxnum_1: 2 priority: 1 param_1: SCAN-READ=END req_1: SEQ 120-125 WITHIN 1D; req_2: ORIENT -10D +/- 1D FROM NOMINAL; req_3: CYCLE 4/120-125; req_4: SPATIAL SCAN comment_1: ORIENT 350D +/- 10D FROM NOMINAL comment_2: ALSO OK. comment_3: THIS IS ONE TARGET OUT OF 11 comment_4: THIS IS AN EXPOSURE TEST FOR comment_5: 5760 ! linenum: 125.000 targname: HBC347 config: WFPC2 opmode: IMAGE aperture: PC1-FIX sp_element: F785LP num_exp: 1 time_per_exp: 72S s_to_n: 5 s_to_n_time: 210S fluxnum_1: 2 priority: 1 param_1: SCAN-READ=END req_1: ORIENT 20D +/- 1D FROM 120; req_2: SPATIAL SCAN; comment_1: ORIENT 340D FROM 120 comment_2: ALSO OK. ! ! ! end of exposure logsheet scan_data: line_list: 120-125 fgs_scan: cont_dwell: D dwell_pnts: 3 dwell_secs: 1.00 scan_width: 16.0000 scan_length: 16.0000 sides_angle: 90.0000 number_lines: 3 scan_rate: 0.0000 first_line_pa: 90.0000 scan_frame: S/C len_offset: 8 wid_offset: 8 ! ! end of scan data