!   $Id: 5468,v 11.1 1994/07/29 15:23:20 pepsa Exp $

coverpage:

  title_1:         THE MASS OF THE WHITE DWARF IN V471 TAURI:
    title_2:       CYCLE 4 MEDIUM
    sci_cat:       HOT STARS
    sci_subcat:    WHITE DWARFS
    proposal_for:  GO
    pi_fname:      HOWARD
    pi_mi:         E.
    pi_lname:      BOND
    pi_inst:       3470
    pi_country:    USA
    pi_phone:      410-338-4718
    num_pri:       1
    hrs:           Y
    time_crit:     Y
    off_fname:     HOLLAND C.
    off_lname:     FORD
    off_title:     DEP DIRECTOR
    off_inst:      3470
    off_addr_1:    3700 SAN MARTIN DR.
    off_city:      BALTIMORE
    off_state:     MD
    off_zip:       21218
    off_country:   USA
    off_phone:     410-338-4803
! end of coverpage

abstract:

    line_1:        V471 Tau is an eclipsing binary in the Hyades cluster whose components
    line_2:        are a DA white dwarf and a detached K2 V main-sequence star. It
    line_3:        presents a unique opportunity for direct determination of the mass of
    line_4:        a white dwarf, except that it is impossible to obtain the velocity
    line_5:        curve of the white dwarf from the ground because its light is swamped
    line_6:        by that of the K dwarf. We propose to determine its velocity curve
    line_7:        using the GHRS at Lyman-alpha, where the white dwarf has a strong
    line_8:        absorption feature, and thus obtain only the fourth fundamentally
    line_9:        determined mass of a white dwarf. As bonuses, our observations will
    line_10:       also: (1) provide constraints on the presence of photospheric metals
    line_11:       accreted at the white dwarf's magnetic poles from the K2 V star's
    line_12:       wind; (2) allow us to search for modulation of metal lines at the
    line_13:       9.25-min rotation period of the white dwarf, which is expected if the
    line_14:       metals are concentrated at the magnetic poles; (3) measure the
    line_15:       gravitational redshift of the white dwarf; and (4) stringently
    line_16:       constrain the magnetic field strength of the white dwarf by the
    line_17:       presence or absence of Zeeman components of Lyman-alpha.

!
! end of abstract

general_form_proposers:

  lname:           BOND
    fname:         HOWARD E.
    inst:          3470
    country:       USA

!

  lname:           SION
    fname:         EDWARD
    inst:          3720
    country:       USA

!

  lname:           STAUFFER
    fname:         JOHN
    inst:          2160
    country:       USA

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        V471 Tau is an eclipsing binary containing a white dwarf (WD) and a K
    line_2:        dwarf (dK), with an orbital period of 12.5 hours. The WD is also known
    line_3:        to rotate with a period of 9.25 minutes.
    line_5:        In order to determine the radial-velocity curve of the white-dwarf
    line_6:        component, we will obtain GHRS observations centered near phases 0.25
    line_7:        and 0.75 of the 12.5-hour binary-star orbit.  We will use the G160M
    line_8:        grating, which provides 34 A of coverage, at a dispersion of 0.07
    line_9:        A/diode, and will center the spectra at Ly-alpha.  Such exposures will
    line_10:       cover the core and a significant portion of the wings of Ly-alpha.
    line_12:       We will obtain a total of four independent observations each near
    line_13:       phase 0.25 and near phase 0.75, for a total of eight separate
    line_14:       observations.  Each of the eight observations will have a duration of
    line_15:       four white-dwarf rotation periods, for a total of 37 min.
    line_17:       Each of the 37-min runs will be broken into 16 individual spectra
    line_18:       (i.e., there will be four spectra taken per white-dwarf rotation
    line_19:       period), in order to allow a search for rotational modulation of any
    line_20:       Zeeman structure in Ly-alpha or in any photospheric metal lines. Note
    line_21:       that deadtime between exposures is assumed to be 20 sec.  The exposure
    line_22:       time for each of the 16 spectra is thus 8 times 14.4 sec, which is the
    line_23:       step-time for our chosen step-patt and comb, or 115.2 seconds.

!

  question:        3
    section:       2
    line_1:        The observing sequence (for each of the eight independent
    line_2:        observations) is: (1) acquire target in LSA; (2) acquire/peakup in
    line_3:        SSA; (3) wavelength calibration (with no further carousel motions
    line_4:        during the sequence); (4) the 16 science observations covering 37 min;
    line_5:        (5) a final wavelength calibration.

!

  question:        4
    section:       1
    line_1:        (See Phase I proposal.)

!

  question:        5
    section:       1
    line_1:        Observations are time-critical and uninterrupted, since they must cover
    line_2:        specific orbital phases of the binary star.  The detailed requirements
    line_3:        are given in the Special Requirements on the Exposure Logsheet.
    line_4:        DARK TIME would have been desirable to reduce the intensity of
    line_5:        geocoronal Lyman-alpha but we were told in Cycle 3 that this would make
    line_6:        the observations very difficult to schedule.

!

  question:        6
    section:       1
    line_1:        Wavelength calibrations before and after the science observations are
    line_2:        specified in the Exposure Logsheet.

!


!

  question:        8
    section:       1
    line_1:        None.

!

  question:        9
    section:       1
    line_1:        (See Phase I proposal.)

!

  question:        10
    section:       1
    line_1:        (See Phase I proposal.)

!
!end of general form text

general_form_address:

  lname:           BOND
    fname:         HOWARD E.
    category:      PI
    inst:          3470
    addr_1:        SPACE TELESCOPE SCIENCE INSTITUTE
    addr_2:        3700 SAN MARTIN DRIVE
    city:          BALTIMORE
    state:         MD
    zip:           21218
    country:       USA
    phone:         410-338-4718
    telex:         BOND@STSCI.EDU

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        V471-TAU
    name_2:        BD+16D516
    name_3:        GSC1252-212
    descr_1:       A,120,139,161
    pos_1:         PLATE-ID=00FH,
    pos_2:         RA = 03H 50M 24.85S +/- 0.7",
    pos_3:         DEC = +17D 14' 47.7" +/- 0.7"
    equinox:       J2000
    pm_or_par:     Y
    pos_epoch_bj:  J
    pos_epoch_yr:  1993.00
    ra_pm_val:     0.006200
    dec_pm_val:    -0.0140
    fluxnum_1:     1
    fluxval_1:     V=10.7,TYPE=DA
    fluxnum_2:     1
    fluxval_2:     B-V=0.92

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  1.8S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN
    req_1:         CYCLE 4 / 1-39;
    req_2:         ONBOARD ACQ FOR 2
    comment_1:     THIS BEGINS THE FIRST OBSERVATION
    comment_2:     SEQUENCE TAKEN NEAR PHASE 0.25.
    comment_3:     STEP-TIME OF 0.2 SEC WAS USED.

!

    linenum:       2.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      0.25
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  40S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=5,
    req_1:         ONBOARD ACQ FOR 3-4
    comment_1:     STEP-TIME OF 1.6 SEC WAS USED.

!

    linenum:       3.000
    targname:      WAVE
    config:        HRS
    opmode:        ACCUM
    aperture:      SC2
    sp_element:    G160M
    wavelength:    1215
    num_exp:       1
    time_per_exp:  DEF
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO
    req_1:         CALIB FOR 4 NO SLEW;
    req_2:         PERIOD 0.5211833 D +/- 0.0000001 D;
    req_3:         ZERO-PHASE JD2440612.6696 +/- 0.0001 D;
    req_4:         PHASE 0.23 +/- 0.06;
    req_5:         SEQ 3-4 NON-INT
    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
    comment_2:     JUST BEFORE THE SCIENCE OBSERVATION.
    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
    comment_4:     DURING OR AFTER THIS OBSERVATION, NOR
    comment_5:     DURING REST OF THE SEQUENCE.  NO
    comment_6:     INTERRUPTIONS FOR SPYBAL AT ANY TIME.

!

    linenum:       4.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1215
    num_exp:       16
    time_per_exp:  136S
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO,
    param_4:       CENSOR=YES,
    param_5:       DOPPLER=ON
    comment_1:     THE 16 OBSERVATIONS SHOULD BE TAKEN
    comment_2:     CONTIGUOUSLY.  THE EXPOSURE TIME HAS
    comment_3:     BEEN CHOSEN SUCH THAT THE 16 EXPOSURES
    comment_4:     WILL COVER EXACTLY 4 ROTATIONS OF THE
    comment_5:     WHITE DWARF, I.E., 37 UNINTERRUPTED
    comment_6:     MINUTES.

!
!
!    linenum:       5.000
!    targname:      WAVE
!    config:        HRS
!    opmode:        ACCUM
!    aperture:      SC2
!    sp_element:    G160M
!    wavelength:    1215
!    num_exp:       1
!    time_per_exp:  DEF
!    fluxnum_1:     1
!    priority:      1
!    param_1:       STEP-PATT=5,
!    param_2:       FP-SPLIT=NO,
!    param_3:       COMB=TWO
!    req_1:         CALIB FOR 4 NO SLEW
!    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
!    comment_2:     JUST AFTER THE SCIENCE OBSERVATION.
!    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
!    comment_4:     BEFORE OR DURING THIS OBSERVATION.
!
!

    linenum:       6.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  1.8S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN
    req_1:         ONBOARD ACQ FOR 7
    comment_1:     THIS BEGINS THE SECOND OBSERVATION
    comment_2:     SEQUENCE TAKEN NEAR PHASE 0.25.
    comment_3:     STEP-TIME OF 0.2 SEC WAS USED.

!

    linenum:       7.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      0.25
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  40S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=5,
    req_1:         ONBOARD ACQ FOR 8-9
    comment_1:     STEP-TIME OF 1.6 SEC WAS USED.

!

    linenum:       8.000
    targname:      WAVE
    config:        HRS
    opmode:        ACCUM
    aperture:      SC2
    sp_element:    G160M
    wavelength:    1215
    num_exp:       1
    time_per_exp:  DEF
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO
    req_1:         CALIB FOR 9 NO SLEW;
    req_2:         PERIOD 0.5211833 D +/- 0.0000001 D;
    req_3:         ZERO-PHASE JD2440612.6696 +/- 0.0001 D;
    req_4:         PHASE 0.23 +/- 0.06;
    req_5:         SEQ 8-9 NON-INT
    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
    comment_2:     JUST BEFORE THE SCIENCE OBSERVATION.
    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
    comment_4:     DURING OR AFTER THIS OBSERVATION, NOR
    comment_5:     DURING REST OF THE SEQUENCE.  NO
    comment_6:     INTERRUPTIONS FOR SPYBAL AT ANY TIME.

!

    linenum:       9.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1215
    num_exp:       16
    time_per_exp:  136S
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO,
    param_4:       CENSOR=YES,
    param_5:       DOPPLER=ON
    comment_1:     THE 16 OBSERVATIONS SHOULD BE TAKEN
    comment_2:     CONTIGUOUSLY.  THE EXPOSURE TIME HAS
    comment_3:     BEEN CHOSEN SUCH THAT THE 16 EXPOSURES
    comment_4:     WILL COVER EXACTLY 4 ROTATIONS OF THE
    comment_5:     WHITE DWARF, I.E., 37 UNINTERRUPTED
    comment_6:     MINUTES.

!
!
!    linenum:       10.000
!    targname:      WAVE
!    config:        HRS
!    opmode:        ACCUM
!    aperture:      SC2
!    sp_element:    G160M
!    wavelength:    1215
!    num_exp:       1
!    time_per_exp:  DEF
!    fluxnum_1:     1
!    priority:      1
!    param_1:       STEP-PATT=5,
!    param_2:       FP-SPLIT=NO,
!    param_3:       COMB=TWO
!    req_1:         CALIB FOR 9 NO SLEW
!    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
!    comment_2:     JUST AFTER THE SCIENCE OBSERVATION.
!    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
!    comment_4:     BEFORE OR DURING THIS OBSERVATION.
!
!

    linenum:       11.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  1.8S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN
    req_1:         ONBOARD ACQ FOR 12
    comment_1:     THIS BEGINS THE THIRD OBSERVATION
    comment_2:     SEQUENCE TAKEN NEAR PHASE 0.25.
    comment_3:     STEP-TIME OF 0.2 SEC WAS USED.

!

    linenum:       12.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      0.25
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  40S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=5,
    req_1:         ONBOARD ACQ FOR 13-14
    comment_1:     STEP-TIME OF 1.6 SEC WAS USED.

!

    linenum:       13.000
    targname:      WAVE
    config:        HRS
    opmode:        ACCUM
    aperture:      SC2
    sp_element:    G160M
    wavelength:    1214
    num_exp:       1
    time_per_exp:  DEF
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO
    req_1:         CALIB FOR 14 NO SLEW;
    req_2:         PERIOD 0.5211833 D +/- 0.0000001 D;
    req_3:         ZERO-PHASE JD2440612.6696 +/- 0.0001 D;
    req_4:         PHASE 0.23 +/- 0.06;
    req_5:         SEQ 13-14 NON-INT
    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
    comment_2:     JUST BEFORE THE SCIENCE OBSERVATION.
    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
    comment_4:     DURING OR AFTER THIS OBSERVATION, NOR
    comment_5:     DURING REST OF THE SEQUENCE.  NO
    comment_6:     INTERRUPTIONS FOR SPYBAL AT ANY TIME.

!

    linenum:       14.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1214
    num_exp:       16
    time_per_exp:  136S
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO,
    param_4:       CENSOR=YES,
    param_5:       DOPPLER=ON
    comment_1:     THE 16 OBSERVATIONS SHOULD BE TAKEN
    comment_2:     CONTIGUOUSLY.  THE EXPOSURE TIME HAS
    comment_3:     BEEN CHOSEN SUCH THAT THE 16 EXPOSURES
    comment_4:     WILL COVER EXACTLY 4 ROTATIONS OF THE
    comment_5:     WHITE DWARF, I.E., 37 UNINTERRUPTED
    comment_6:     MINUTES.

!
!
!    linenum:       15.000
!    targname:      WAVE
!    config:        HRS
!    opmode:        ACCUM
!    aperture:      SC2
!    sp_element:    G160M
!    wavelength:    1214
!    num_exp:       1
!    time_per_exp:  DEF
!    fluxnum_1:     1
!    priority:      1
!    param_1:       STEP-PATT=5,
!    param_2:       FP-SPLIT=NO,
!    param_3:       COMB=TWO
!    req_1:         CALIB FOR 14 NO SLEW
!    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
!    comment_2:     JUST AFTER THE SCIENCE OBSERVATION.
!    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
!    comment_4:     BEFORE OR DURING THIS OBSERVATION.
!
!

    linenum:       16.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  1.8S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN
    req_1:         ONBOARD ACQ FOR 17
    comment_1:     THIS BEGINS THE FOURTH OBSERVATION
    comment_2:     SEQUENCE TAKEN NEAR PHASE 0.25.
    comment_3:     STEP-TIME OF 0.2 SEC WAS USED.

!

    linenum:       17.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      0.25
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  40S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=5,
    req_1:         ONBOARD ACQ FOR 18-19
    comment_1:     STEP-TIME OF 1.6 SEC WAS USED.

!

    linenum:       18.000
    targname:      WAVE
    config:        HRS
    opmode:        ACCUM
    aperture:      SC2
    sp_element:    G160M
    wavelength:    1214
    num_exp:       1
    time_per_exp:  DEF
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO
    req_1:         CALIB FOR 19 NO SLEW;
    req_2:         PERIOD 0.5211833 D +/- 0.0000001 D;
    req_3:         ZERO-PHASE JD2440612.6696 +/- 0.0001 D;
    req_4:         PHASE 0.23 +/- 0.06;
    req_5:         SEQ 18-19 NON-INT
    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
    comment_2:     JUST BEFORE THE SCIENCE OBSERVATION.
    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
    comment_4:     DURING OR AFTER THIS OBSERVATION, NOR
    comment_5:     DURING REST OF THE SEQUENCE.  NO
    comment_6:     INTERRUPTIONS FOR SPYBAL AT ANY TIME.

!

    linenum:       19.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1214
    num_exp:       16
    time_per_exp:  136S
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO,
    param_4:       CENSOR=YES,
    param_5:       DOPPLER=ON
    comment_1:     THE 16 OBSERVATIONS SHOULD BE TAKEN
    comment_2:     CONTIGUOUSLY.  THE EXPOSURE TIME HAS
    comment_3:     BEEN CHOSEN SUCH THAT THE 16 EXPOSURES
    comment_4:     WILL COVER EXACTLY 4 ROTATIONS OF THE
    comment_5:     WHITE DWARF, I.E., 37 UNINTERRUPTED
    comment_6:     MINUTES.

!
!
!    linenum:       20.000
!    targname:      WAVE
!    config:        HRS
!    opmode:        ACCUM
!    aperture:      SC2
!    sp_element:    G160M
!    wavelength:    1214
!    num_exp:       1
!    time_per_exp:  DEF
!    fluxnum_1:     1
!    priority:      1
!    param_1:       STEP-PATT=5,
!    param_2:       FP-SPLIT=NO,
!    param_3:       COMB=TWO
!    req_1:         CALIB FOR 19 NO SLEW
!    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
!    comment_2:     JUST AFTER THE SCIENCE OBSERVATION.
!    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
!    comment_4:     BEFORE OR DURING THIS OBSERVATION.
!
!

    linenum:       21.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  1.8S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN
    req_1:         ONBOARD ACQ FOR 22
    comment_1:     THIS BEGINS THE FIRST OBSERVATION
    comment_2:     SEQUENCE TAKEN NEAR PHASE 0.75.
    comment_3:     STEP-TIME OF 0.2 SEC WAS USED.

!

    linenum:       22.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      0.25
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  40S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=5,
    req_1:         ONBOARD ACQ FOR 23-24
    comment_1:     STEP-TIME OF 1.6 SEC WAS USED.

!

    linenum:       23.000
    targname:      WAVE
    config:        HRS
    opmode:        ACCUM
    aperture:      SC2
    sp_element:    G160M
    wavelength:    1215
    num_exp:       1
    time_per_exp:  DEF
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO
    req_1:         CALIB FOR 24 NO SLEW;
    req_2:         PERIOD 0.5211833 D +/- 0.0000001 D;
    req_3:         ZERO-PHASE JD2440612.6696 +/- 0.0001 D;
    req_4:         PHASE 0.73 +/- 0.06;
    req_5:         SEQ 23-24 NON-INT
    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
    comment_2:     JUST BEFORE THE SCIENCE OBSERVATION.
    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
    comment_4:     DURING OR AFTER THIS OBSERVATION, NOR
    comment_5:     DURING REST OF THE SEQUENCE.  NO
    comment_6:     INTERRUPTIONS FOR SPYBAL AT ANY TIME.

!

    linenum:       24.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1215
    num_exp:       16
    time_per_exp:  136S
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO,
    param_4:       CENSOR=YES,
    param_5:       DOPPLER=ON
    comment_1:     THE 16 OBSERVATIONS SHOULD BE TAKEN
    comment_2:     CONTIGUOUSLY.  THE EXPOSURE TIME HAS
    comment_3:     BEEN CHOSEN SUCH THAT THE 16 EXPOSURES
    comment_4:     WILL COVER EXACTLY 4 ROTATIONS OF THE
    comment_5:     WHITE DWARF, I.E., 37 UNINTERRUPTED
    comment_6:     MINUTES.

!
!
!    linenum:       25.000
!    targname:      WAVE
!    config:        HRS
!    opmode:        ACCUM
!    aperture:      SC2
!    sp_element:    G160M
!    wavelength:    1215
!    num_exp:       1
!    time_per_exp:  DEF
!    fluxnum_1:     1
!    priority:      1
!    param_1:       STEP-PATT=5,
!    param_2:       FP-SPLIT=NO,
!    param_3:       COMB=TWO
!    req_1:         CALIB FOR 24 NO SLEW
!    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
!    comment_2:     JUST AFTER THE SCIENCE OBSERVATION.
!    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
!    comment_4:     BEFORE OR DURING THIS OBSERVATION.
!
!

    linenum:       26.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  1.8S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN
    req_1:         ONBOARD ACQ FOR 27
    comment_1:     THIS BEGINS THE SECOND OBSERVATION
    comment_2:     SEQUENCE TAKEN NEAR PHASE 0.75.
    comment_3:     STEP-TIME OF 0.2 SEC WAS USED.

!

    linenum:       27.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      0.25
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  40S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=5,
    req_1:         ONBOARD ACQ FOR 28-29
    comment_1:     STEP-TIME OF 1.6 SEC WAS USED.

!

    linenum:       28.000
    targname:      WAVE
    config:        HRS
    opmode:        ACCUM
    aperture:      SC2
    sp_element:    G160M
    wavelength:    1215
    num_exp:       1
    time_per_exp:  DEF
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO
    req_1:         CALIB FOR 29 NO SLEW;
    req_2:         PERIOD 0.5211833 D +/- 0.0000001 D;
    req_3:         ZERO-PHASE JD2440612.6696 +/- 0.0001 D;
    req_4:         PHASE 0.73 +/- 0.06;
    req_5:         SEQ 28-29 NON-INT
    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
    comment_2:     JUST BEFORE THE SCIENCE OBSERVATION.
    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
    comment_4:     DURING OR AFTER THIS OBSERVATION, NOR
    comment_5:     DURING REST OF THE SEQUENCE.  NO
    comment_6:     INTERRUPTIONS FOR SPYBAL AT ANY TIME.

!

    linenum:       29.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1215
    num_exp:       16
    time_per_exp:  136S
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO,
    param_4:       CENSOR=YES,
    param_5:       DOPPLER=ON
    comment_1:     THE 16 OBSERVATIONS SHOULD BE TAKEN
    comment_2:     CONTIGUOUSLY.  THE EXPOSURE TIME HAS
    comment_3:     BEEN CHOSEN SUCH THAT THE 16 EXPOSURES
    comment_4:     WILL COVER EXACTLY 4 ROTATIONS OF THE
    comment_5:     WHITE DWARF, I.E., 37 UNINTERRUPTED
    comment_6:     MINUTES.

!
!
!    linenum:       30.000
!    targname:      WAVE
!    config:        HRS
!    opmode:        ACCUM
!    aperture:      SC2
!    sp_element:    G160M
!    wavelength:    1215
!    num_exp:       1
!    time_per_exp:  DEF
!    fluxnum_1:     1
!    priority:      1
!    param_1:       STEP-PATT=5,
!    param_2:       FP-SPLIT=NO,
!    param_3:       COMB=TWO
!    req_1:         CALIB FOR 29 NO SLEW
!    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
!    comment_2:     JUST AFTER THE SCIENCE OBSERVATION.
!    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
!    comment_4:     BEFORE OR DURING THIS OBSERVATION.
!
!

    linenum:       31.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  1.8S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN
    req_1:         ONBOARD ACQ FOR 32
    comment_1:     THIS BEGINS THE THIRD OBSERVATION
    comment_2:     SEQUENCE TAKEN NEAR PHASE 0.75.
    comment_3:     STEP-TIME OF 0.2 SEC WAS USED.

!

    linenum:       32.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      0.25
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  40S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=5,
    req_1:         ONBOARD ACQ FOR 33-34
    comment_1:     STEP-TIME OF 1.6 SEC WAS USED.

!

    linenum:       33.000
    targname:      WAVE
    config:        HRS
    opmode:        ACCUM
    aperture:      SC2
    sp_element:    G160M
    wavelength:    1214
    num_exp:       1
    time_per_exp:  DEF
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO
    req_1:         CALIB FOR 34 NO SLEW;
    req_2:         PERIOD 0.5211833 D +/- 0.0000001 D;
    req_3:         ZERO-PHASE JD2440612.6696 +/- 0.0001 D;
    req_4:         PHASE 0.73 +/- 0.06;
    req_5:         SEQ 33-34 NON-INT
    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
    comment_2:     JUST BEFORE THE SCIENCE OBSERVATION.
    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
    comment_4:     DURING OR AFTER THIS OBSERVATION, NOR
    comment_5:     DURING REST OF THE SEQUENCE.  NO
    comment_6:     INTERRUPTIONS FOR SPYBAL AT ANY TIME.

!

    linenum:       34.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1214
    num_exp:       16
    time_per_exp:  136S
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO,
    param_4:       CENSOR=YES,
    param_5:       DOPPLER=ON
    comment_1:     THE 16 OBSERVATIONS SHOULD BE TAKEN
    comment_2:     CONTIGUOUSLY.  THE EXPOSURE TIME HAS
    comment_3:     BEEN CHOSEN SUCH THAT THE 16 EXPOSURES
    comment_4:     WILL COVER EXACTLY 4 ROTATIONS OF THE
    comment_5:     WHITE DWARF, I.E., 37 UNINTERRUPTED
    comment_6:     MINUTES.

!
!
!    linenum:       35.000
!    targname:      WAVE
!    config:        HRS
!    opmode:        ACCUM
!    aperture:      SC2
!    sp_element:    G160M
!    wavelength:    1214
!    num_exp:       1
!    time_per_exp:  DEF
!    fluxnum_1:     1
!    priority:      1
!    param_1:       STEP-PATT=5,
!    param_2:       FP-SPLIT=NO,
!    param_3:       COMB=TWO
!    req_1:         CALIB FOR 34 NO SLEW
!    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
!    comment_2:     JUST AFTER THE SCIENCE OBSERVATION.
!    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
!    comment_4:     BEFORE OR DURING THIS OBSERVATION.
!
!

    linenum:       36.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ
    aperture:      2.0
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  1.8S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=3,
    param_2:       BRIGHT=RETURN
    req_1:         ONBOARD ACQ FOR 37
    comment_1:     THIS BEGINS THE FOURTH OBSERVATION
    comment_2:     SEQUENCE TAKEN NEAR PHASE 0.75.
    comment_3:     STEP-TIME OF 0.2 SEC WAS USED.

!

    linenum:       37.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACQ/PEAKUP
    aperture:      0.25
    sp_element:    MIRROR-N2
    num_exp:       1
    time_per_exp:  40S
    fluxnum_1:     1
    priority:      1
    param_1:       SEARCH-SIZE=5,
    req_1:         ONBOARD ACQ FOR 38-39
    comment_1:     STEP-TIME OF 1.6 SEC WAS USED.

!

    linenum:       38.000
    targname:      WAVE
    config:        HRS
    opmode:        ACCUM
    aperture:      SC2
    sp_element:    G160M
    wavelength:    1214
    num_exp:       1
    time_per_exp:  DEF
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO
    req_1:         CALIB FOR 39 NO SLEW;
    req_2:         PERIOD 0.5211833 D +/- 0.0000001 D;
    req_3:         ZERO-PHASE JD2440612.6696 +/- 0.0001 D;
    req_4:         PHASE 0.73 +/- 0.06;
    req_5:         SEQ 38-39 NON-INT
    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
    comment_2:     JUST BEFORE THE SCIENCE OBSERVATION.
    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
    comment_4:     DURING OR AFTER THIS OBSERVATION, NOR
    comment_5:     DURING REST OF THE SEQUENCE.  NO
    comment_6:     INTERRUPTIONS FOR SPYBAL AT ANY TIME.

!

    linenum:       39.000
    targname:      V471-TAU
    config:        HRS
    opmode:        ACCUM
    aperture:      0.25
    sp_element:    G160M
    wavelength:    1214
    num_exp:       16
    time_per_exp:  136S
    fluxnum_1:     1
    priority:      1
    param_1:       STEP-PATT=5,
    param_2:       FP-SPLIT=NO,
    param_3:       COMB=TWO,
    param_4:       CENSOR=YES,
    param_5:       DOPPLER=ON
    comment_1:     THE 16 OBSERVATIONS SHOULD BE TAKEN
    comment_2:     CONTIGUOUSLY.  THE EXPOSURE TIME HAS
    comment_3:     BEEN CHOSEN SUCH THAT THE 16 EXPOSURES
    comment_4:     WILL COVER EXACTLY 4 ROTATIONS OF THE
    comment_5:     WHITE DWARF, I.E., 37 UNINTERRUPTED
    comment_6:     MINUTES.

!
!
!    linenum:       40.000
!    targname:      WAVE
!    config:        HRS
!    opmode:        ACCUM
!    aperture:      SC2
!    sp_element:    G160M
!    wavelength:    1214
!    num_exp:       1
!    time_per_exp:  DEF
!    fluxnum_1:     1
!    priority:      1
!    param_1:       STEP-PATT=5,
!    param_2:       FP-SPLIT=NO,
!    param_3:       COMB=TWO
!    req_1:         CALIB FOR 39 NO SLEW
!    comment_1:     THIS IS A WAVELENGTH CALIBRATION TAKEN
!    comment_2:     JUST AFTER THE SCIENCE OBSERVATION.
!    comment_3:     THERE SHOULD BE NO CAROUSEL MOTION
!    comment_4:     BEFORE OR DURING THIS OBSERVATION.
!
!
! end of exposure logsheet

! No scan data records found