! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 6050,v 10.1 1995/09/26 18:59:40 pepsa Exp $ ! ! Refer to the HST Phase II Proposal Instructions to fill this out ! ! Anything after a "!" is ignored, and may be deleted ! ! All keywords with multiple entries are comma delimited except the ! Visit_Requirements and Special_Requirements keywords which can be ! delimited with carriage returns or semi-colons, but not commas ! ! For help call your Program Coordinator: Denise Taylor ! Phone: 410 338-4824 , E-mail: dctaylor@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Date generated: Sun Dec 18 11:39:21 EST 1994 ! Proposal_Information ! Section 4 Title: Spectroscopic and photometric study of the very low mass triple system LHS 1070 Proposal_Category: GO Scientific_Category: Cool Stars Cycle: 5 Investigators PI_name: Christoph Leinert PI_Institution: Max-Planck-Institut fuer Astronomie CoI_Name: Andrea Richichi CoI_Institution: Max-Planck-Institut fuer Astronomie Contact: N ! Y or N (designate at most one contact) CoI_Name: France Allard CoI_Institution: University of British Columbia Contact: N ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) Recently we detected and resolved in the near-infrared two faint components to the nearby low mass star LHS 1070. With their absolute K magnitudes of K_B = 10.4 mag and K_C = 10.8 mag these companions are expected to have masses very close to the hydrogen burning limit of 0.08 M_sun. Since the system is at a distance of only 7.5 pc from the sun, dynamical masses can be determined, and the very low mass companions still are bright enough for detailed study. Thus they provide an excellent if not unique opportunity to better determine the poorly covered transition region from low mass stars to substellar masses. We propose to do so by photometry with the WFPC2 and by spectroscopy with the FOS of all three components of LHS 1070. We want -- to check for substellar masses by searching for the Li 670.8 nm absorption, -- to determine luminosities by photometry and by integrating over spectra, -- to determine effective temperatures from VO and CaH bands, and -- to estimate metallicity and age from Na lines and other spectral features. This should also help to better understand other known very faint objects for which information on mass is not available. Questions ! Free format text (please update) Observing_Description: Orbit 1.Accurate positioning is critical for this proposal. Therefore the first orbit is used for an early acquisition with the WFPC2. The same orbit is used to give broadband photometry of the object, complemented by H-Alpha. With overheads of 3 minutes we do not plan for exposures shorter than 1 minute. Example: At V, component "A" has 15.6 mag, and we predict a count of 250 000 in 60s, while for the faintest component "C" (3.5 mag fainter) the count would be 10 000. At B, component "A" has 17.5 mag, "C" is about 4 mag fainter, and the count rates for 8 minutes integration are 64 000 and 1 600, respectively. The remaining 10 minutes left to fill the orbit are used for H-Alpha. With the pixel size of WFPC2 of 0.046 arcsec the components A,B,C will be well separated. Ten orbits are used for spectroscopy. To achieve the scientific goals, S/N ratios of 20-30 are aimed at. Orbits 2-4. Critical peak-up into the 0.3 arcsec aperture with accuracy of 0.04 arcsec requires three orbits, the first for peak-up type A and B, the second for peak-up type C, the third for peak-up type D. The remaining 32 minutes in orbits 3 and 4 will be used for spectroscopy of components "B" and "C" combined with the aperture of 0.9 arcsec at higher S/N ratio. Orbits 5-11. Here, the components "A","B", "C" will be measured separately with gratings F570H and F780H. Example: At 700 nm component "A" has F_Lambda = 10^-14 ergcm^-2s^-1ang^-1. The countrate for grating F780H into the aperture 0.3 arcsec then is about 1.5 counts/s longward of 700 nm. We plan an integration time of 12 min to obtain a total count rate of 1080 (S/N ~ 30). Two orbits (a total of 80 min integration) are used for component "C" to give 740 counts, one orbit for component "B" to give 600 counts. This emphasis is made to be able to see the Lithium absorption if present. Component "A", used as comparison star, always is observed to slightly higher accuracy. Similarly, the remaining three orbits are used for measurements with grating F570H. Real_Time_Justification: Early acquisition by the WFPC2 required in visit 1, since the offsetting from the primary to the faint companions is critical for the spectra to be taken in visit 2. Because of orbital motions in the system, visit 2 should not be later by more than 2 months than visit 1, preferably sooner. We will continue the observations of LHS 1070 in the near- infrared from the ground, in order to know its orbit sufficiently well to allow at least differential predictions of orbital motion for a couple of months ahead for the faint components of this system. Calibration_Justification: ! Move appropriate text from Real_Time_Justification The calibration information provided by the project should be sufficient for our proposal. Additional_Comments: The object is a high proper motion star (LHS !) and with no good coordinates in the literature. We are confident that by reading telescope coordinates during the ground-based infrared observations and by measuring a Schmidt plate taken for this purpuse, we will be able to predict the coordinates to within 1-2 arcsec. This should be well sufficient for the exposure with the PC. However, we want to mention this particularity of the object. Fixed_Targets ! Section 5.1 Target_Number: 1 Target_Name: LHS1070 Alternate_Names: GJ2005 Description: STAR, M V-IV, BROWN DWARF Position: RA = 0H 24M 44.40S +/- 0.30S,! Most common specification format is DEC = -27D 08' 26.5" +/- 5.0" ! RA=0H 0M 0.00S +/- 0S, ! DEC=0D 0' 0.0" +/- 0", ! PLATE-ID=0000 Equinox: 2000 RV_or_Z: V = -45 RA_PM: -0.0036 ! Units are seconds of time per year Dec_PM: 0.612 ! Units are seconds of arc per year Epoch: B1995 Annual_Parallax: 0.1328 Flux: V=15.42 +/- 0.1 ! Include at least V and B-V TYPE= M5.5 R-I = 1.78 +/- 0.1 B-V = 1.98 +/- 0.2 Comments: -- B-V taken from Gliese 866 (M dwarf system with same spectral type) -- remaining information from Gliese-Jahreiss-catalog of nearby stars, to appear in print 1995 -- values given refer to the integrated system (A+B+C). Target_Number: 2 Target_Name: LHS1070-A-OFFSET Alternate_Names: GJ2005-A Description: STAR, M V-IV, BROWN DWARF Position: RA = 0H 24M 44.407S +/- 0.30S,! Most common specification format is DEC = -27D 08' 37.96" +/- 5.0", PLATE-ID=04JL Equinox: 2000 RV_or_Z: V = -45 RA_PM: -0.0062 ! Units are seconds of time per year Dec_PM: 0.612 ! Units are seconds of arc per year Epoch: 1977.70 Annual_Parallax: 0.1328 Flux: V=15.42 +/- 0.1 ! Include at least V and B-V TYPE= M5.5 R-I = 1.78 +/- 0.1 B-V = 1.98 +/- 0.2 Comments: -- component A is expected to carry most of the flux of the system (A+B+C) at the optical wavelengths. Coordinates were taken from the GASP system since component A should dominate (over B & C) on the plates. Target_Number: 3 Target_Name: LHS1070-B Alternate_Names: GJ2005-B Description: STAR, M V-IV, BROWN DWARF Position: RA-OFF=-0.0088S +/- 0.01S, DEC-OFF=+1.100" +/- 0.02", FROM 2 Equinox: 2000 RV_or_Z: V = -45 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: 0.1328 Flux: V=17.64 +/- 0.5 ! Include at least V and B-V TYPE= M7 R-I = 1.97 +/- 0.2 B-V = 2.39 +/- 0.4 Comments: -- the brightness and colour information is not known but estimated by extrapolation from the near-infrared observations of relative brightnesses and from the brightnesses of the system (A+B+C). -- offset positions are provisional, to be improved before the observations will happen -- spectral type is a guess Target_Number: 4 Target_Name: LHS1070-C Alternate_Names: GJ2005-C Description: STAR, M V-IV, BROWN DWARF Position: RA-OFF=-0.0050S +/- 0.01S, DEC-OFF=+1.562" +/- 0.02", FROM 2 Equinox: 2000 RV_or_Z: V = -45 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: 0.1328 Flux: V=18.44 +/- 0.7 ! Include at least V and B-V TYPE= M8 R-I = 2.05 +/- 0.2 B-V = 2.51 +/- 0.5 Comments: same as for (3) !!!6.3.95 -- the brightness and colour information is not known but estimated ! by extrapolation from the near-infrared observations of relative ! brightnesses and from the brightnesses of the system (A+B+C). ! -- offset positions are provisional, to be improved before the ! observations will happen ! -- spectral type is a guess Target_Number: 5 Target_Name: LHS1070-BC Alternate_Names: GJ2005-BC Description: STAR, M V-IV, BROWN DWARF Position: R = 1.334", PA = 356.05D, FROM 2 Equinox: 2000 RV_or_Z: V = -45 RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: 0.1328 Flux: V=17.40 +/- 0.5 ! Include at least V and B-V TYPE= M7 R-I = 2.00 +/- 0.2 B-V = 2.35 +/- 0.5 Comments: -- the brightness, colour and spectral type information is just the combination of values given for components B and C. -- offset positions are provisional, to be improved before the observations will happen -- position to be used for combined observations of B and C Visits ! Section 6 Visit_Number: 1 Visit_Requirements: ! Section 7.1 PCS MODE F ![Fine | Gyro] Visit_Comments: This visit produces scientific results. At the same time it is used as an early acquisition for visits 2 and 3 (orbits 2-11). Exposure_Number: 1 ! Section 6.5 Target_Name: LHS1070 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F814W Wavelength: 7940 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 10S Special_Requirements: ! Section 7.2 Exposure_Number: 2 ! Section 6.5 Target_Name: LHS1070 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F675W Wavelength: 6714 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 10S Special_Requirements: ! Section 7.2 Exposure_Number: 3 ! Section 6.5 Target_Name: LHS1070 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F555W Wavelength: 5407 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 20S Special_Requirements: ! Section 7.2 Exposure_Number: 4 ! Section 6.5 Target_Name: LHS1070 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F439W Wavelength: 4300 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 350S Special_Requirements: ! Section 7.2 Exposure_Number: 5 ! Section 6.5 Target_Name: LHS1070 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F656N Wavelength: 6563 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 400S Special_Requirements: ! Section 7.2 Exposure_Number: 6 ! Section 6.5 Target_Name: LHS1070 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F658N Wavelength: 6590 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 300S Special_Requirements: ! Section 7.2 Exposure_Number: 7 ! Section 6.5 Target_Name: LHS1070 Config: WFPC2 Opmode: IMAGE Aperture: PC1 Sp_Element: F673N Wavelength: 6590 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 200S Special_Requirements: !SEQ 1-7 NON-INT ! Section 7.2 Visit_Number: 2 Visit_Requirements: ! Section 7.1 PCS MODE F ![Fine | Gyro] AFTER 1 BY 50D TO 110D ON HOLD FOR 1 On_Hold_Comments: Waiting for the results of early acquisition from visit 1 Visit_Comments: -- This visit is to provide accurate acquisition in several steps on ****** the primary ******* of the triple system. Then measurements on the primary, and by offsetting, on components B and C are performed. Fills orbits 2-11. -- Since there is orbital motion in the system, of the order of 30 degrees per year, visit 2 should follow visit one as soon as possible, in order to have minimum uncertainties in the positions of components B and C relative to A. Also, in order to keep flexibility in the scheduling of visit 2, it would be good to get the WFPC exposures of visit 1 as early as possible during cycle 5. Exposure_Number: 1 ! Section 6.5 Target_Name: LHS1070-A-OFFSET Config: FOS/RD Opmode: ACQ/PEAK Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: SEARCH-SIZE-X = 1, SEARCH-SIZE-Y = 3, SCAN-STEP-Y = 1.23 !non-critical type A to +/- 0.6" Number_of_Iterations: 1 Time_Per_Exposure: 4.0S Special_Requirements: ONBOARD ACQ FOR 2 ! Section 7.2 Exposure_Number: 2 ! Section 6.5 Target_Name: LHS1070-A-OFFSET Config: FOS/RD Opmode: ACQ/PEAK Aperture: 1.0 Sp_Element: MIRROR Wavelength: Optional_Parameters: SEARCH-SIZE-X = 6, SEARCH-SIZE-Y = 2, SCAN-STEP-X = 0.61, SCAN-STEP-Y = 0.61 !non-critical type B to +/- 0.43" Number_of_Iterations: 1 Time_Per_Exposure: 4.0S Special_Requirements: ONBOARD ACQ FOR 3 ! Section 7.2 Exposure_Number: 3 ! Section 6.5 Target_Name: LHS1070-A-OFFSET Config: FOS/RD Opmode: ACQ/PEAK Aperture: 0.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: SEARCH-SIZE-X = 5, SEARCH-SIZE-Y = 5, SCAN-STEP-X = 0.17, SCAN-STEP-Y = 0.17 !non-critical type C to +/- 0.12" Number_of_Iterations: 1 Time_Per_Exposure: 4.0S Special_Requirements: ONBOARD ACQ FOR 4 ! Section 7.2 Exposure_Number: 4 ! Section 6.5 Target_Name: LHS1070-A-OFFSET Config: FOS/RD Opmode: ACQ/PEAK Aperture: 0.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: SEARCH-SIZE-X = 5, SEARCH-SIZE-Y = 5, SCAN-STEP-X = 0.052, SCAN-STEP-Y = 0.052 !*** critical *** type D to +/- 0.04" Number_of_Iterations: 1 Time_Per_Exposure: 7.0S Special_Requirements: ONBOARD ACQ FOR 5-20 ! Section 7.2 Comments: -- the pointing has to be ** very accurate ** over orbits nr. 2-15, since B and C are separated only by 0.3"-0.4". Our acquisition has to provide this accuracy and has to actually peak up on the primary star. Exposure_Number: 5 ! Section 6.5 Target_Name: LHS1070-A-OFFSET Config: FOS/RD Opmode: ACCUM Aperture: 1.0 Sp_Element: G570H !Wavelength: 4571-6820 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 580S Special_Requirements: ! Section 7.2 Exposure_Number: 6 ! Section 6.5 Target_Name: LHS1070-BC Config: FOS/RD Opmode: ACCUM Aperture: 1.0 Sp_Element: G650L !Wavelength: 3540-8729 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 600S Special_Requirements: ! Section 7.2 Exposure_Number: 7 ! Section 6.5 Target_Name: LHS1070-A-OFFSET Config: FOS/RD Opmode: ACCUM Aperture: 1.0 Sp_Element: G650L !Wavelength: 3540-8729 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 180S Special_Requirements: ! Section 7.2 Exposure_Number: 8 ! Section 6.5 Target_Name: LHS1070-B Config: FOS/RD Opmode: ACCUM Aperture: 0.3 Sp_Element: G570H !Wavelength: 4571-6820 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1910S Special_Requirements: !SEQ 7-8 NON-INT ! Section 7.2 Exposure_Number: 9 ! Section 6.5 Target_Name: LHS1070-C Config: FOS/RD Opmode: ACCUM Aperture: 0.3 Sp_Element: G570H !Wavelength: 4571-6820 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 2370S Special_Requirements: ! Section 7.2 Exposure_Number: 10 ! Section 6.5 Target_Name: LHS1070-C Config: FOS/RD Opmode: ACCUM Aperture: 0.3 Sp_Element: G570H !Wavelength: 4571-6820 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 2370S Special_Requirements: ! Section 7.2 Exposure_Number: 11 ! Section 6.5 Target_Name: LHS1070-A-OFFSET Config: FOS/RD Opmode: ACCUM Aperture: 1.0 Sp_Element: G780H !Wavelength: 6272-9219 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 570S Special_Requirements: ! Section 7.2 Exposure_Number: 12 ! Section 6.5 Target_Name: LHS1070-C Config: FOS/RD Opmode: ACCUM Aperture: 0.3 Sp_Element: G780H !Wavelength: 6272-9219 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1500S Special_Requirements: !SEQ 11-12 NON-INT ! Section 7.2 Exposure_Number: 13 ! Section 6.5 Target_Name: LHS1070-C Config: FOS/RD Opmode: ACCUM Aperture: 0.3 Sp_Element: G780H !Wavelength: 6272-9219 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 2370S Special_Requirements: ! Section 7.2 Exposure_Number: 14 ! Section 6.5 Target_Name: LHS1070-B Config: FOS/RD Opmode: ACCUM Aperture: 0.3 Sp_Element: G780H !Wavelength: 6272-9219 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1980S Special_Requirements: ! Section 7.2 Exposure_Number: 15 ! Section 6.5 Target_Name: LHS1070-B Config: FOS/RD Opmode: IMAGE Aperture: 4.3 Sp_Element: MIRROR !Wavelength: 1650-9000 Optional_Parameters: SUB-STEP=4 !0.075 ARCSEC Y-OFFSET=0 Y-SPACE=16.76 !0.075 ARCSEC Y-SIZE=21 !+- 1.82 ARCSEC STEP-TIME=1.0 ! COUNT RATE 1000 PER SEC FOR COMP. A Number_of_Iterations: 1 Time_Per_Exposure: 84S Special_Requirements: SAME POS AS 14 ! Section 7.2 !SEQ 14-15 NON-INT ! Visit_Number: 3 !Visit_Requirements: ! Section 7.1 ! PCS MODE F ![Fine | Gyro] ! ON HOLD FOR 2 ! On_Hold_Comments: Using the results of accurate acquisition ! from visit 2 ! Visit_Comments: -- This visit has to recover the accurate acquisition ! obtained in several steps during visit 2. This is done ! with the procedure "REUSE TARGET OFFSETS". ! Then measurements on the primary, and by offsetting, on ! components B and C are performed. This fills two orbits. ! -- Visit 3 should be performed almost immediately after ! visit 2. (*** The timing link between visits 2 and 3 ! calculated by the programme is erraneous, putting more ! than a month betwwen the two visits instead of a few ! days.***) Exposure_Number: 16 Target_Name: LHS1070-B Config: FOS/RD Opmode: ACCUM Aperture: 0.3 Sp_Element: G650L !Wavelength: 3540-8729 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 550S Special_Requirements: ! Section 7.2 Comments: -- Concerning "REUSE TARGET OFFSETS": Two minutes have been reserved here to allow for the necessary small angle movements. The programme added them to exposure two, from where they should be taken again.*** Exposure_Number: 17 ! Section 6.5 Target_Name: LHS1070-C Config: FOS/RD Opmode: ACCUM Aperture: 0.3 Sp_Element: G650L !Wavelength: 3540-8729 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 1020S Special_Requirements: !SEQ 1-2 NON-INT ! Section 7.2 Comments: Exposure_Number: 18 ! Section 6.5 Target_Name: LHS1070-BC Config: FOS/RD Opmode: ACCUM Aperture: 1.0 Sp_Element: G780H !Wavelength: 6272-9219 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 830S Special_Requirements: ! Section 7.2 Exposure_Number: 19 ! Section 6.5 Target_Name: LHS1070-BC Config: FOS/RD Opmode: ACCUM Aperture: 1.0 Sp_Element: G570H !Wavelength: 4571-6820 Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 830S Special_Requirements: !SEQ 3-5 NON-INT ! Section 7.2 Exposure_Number: 20 ! Section 6.5 Target_Name: LHS1070-B Config: FOS/RD Opmode: IMAGE Aperture: 4.3 Sp_Element: MIRROR !Wavelength: 1650-9000 Optional_Parameters: SUB-STEP=4 !0.075 ARCSEC Y-OFFSET=0 Y-SPACE=16.76 !0.075 ARCSEC Y-SIZE=21 !+- 1.82 ARCSEC STEP-TIME=1.0 ! COUNT RATE 1000 PER SEC FOR COMP. A Number_of_Iterations: 1 Time_Per_Exposure: 84S Special_Requirements: SAME POS AS 14 ! Section 7.2 !SEQ 14-15 NON-INT Data_Distribution ! Defaults indicated; change if desired Medium: 8MM ! 8MM or 6250BPI or 1600BPI Blocking_Factor: 10 ! 10 or 1 ! Only astronomers with very old 9- ! track tape drives should consider ! a blocking factor of 1 Ship_To: PI_Address ! STSCI or PI_Address or ! PI Address from Phase I is: ! ! Koenigstuhl 17 , ! D--69117 Heidelberg , Germany ! ! Ship_Via: UPS ! UPS (2-day) or OVERNIGHT ! Overnight shipping done at PI expense !Recipient_Email: ! Needed if Ship_To: is not PI_Address ! ! Let us know what you think of this template and software! ! Please send a list of your likes and dislikes to your Program Coordinator __Diagnostic-Sum-Section__ Software-Version (Controller= 2.0) Preprocessor (Errors= 1 Fatal-Errors= 0 ) Validation (Errors= 0 Fatal-Errors= 0 ) Transformation (Errors= 0 Fatal-Errors= 0 ) CASM (Errors= 1 Fatal-Errors= 0 ) __User-Comments__ 11.3.95 Dear Denise Taylor, please note that I had to split visit 2 into two because more than 8 orbits per visit were not allowed, and that I rely on "REUSE TARGET OFFSETS" for precise reacquisition in visit 3. CHristoph Leinert P.S. The message "Comment too long" is a nuisance. I do not get told which field it is nor which character string excceds the limit. After shortening those fields I had changed after the message first appeared I got tired trying everything and submit now the proposal. Christoph Leinert