!  File:  2451C.PROP
!  Database:  PEPDB
!  Date:  17-FEB-1994:06:48:46

coverpage:

  title_1:         POLARIZATION MAPPING OF THE OPTICAL JET IN 3C273
    sci_cat:       QUASARS & AGN
    sci_subcat:    JETS
    proposal_for:  GO
    pi_title:      DR.
    pi_fname:      R.
    pi_mi:         C.
    pi_lname:      THOMSON
    pi_inst:       INSTITUTE OF ASTRONOMY, CAMBRIDGE
    pi_country:    UK
    pi_phone:      UK+223-337548
    keywords_1:    QUASAR, JET, IMAGING, POLARIZATION
    hours_pri:     7.50
    num_pri:       1
    foc:           X
    pi_position:   DR.
    off_fname:     M.
    off_mi:        J.
    off_lname:     DISNEY
    off_title:     PROFESSOR
    off_inst:      UNIVERSITY OF WALES, CARDIFF
    off_addr_1:    PHYSICS DEPT.
    off_addr_2:    P.O. BOX 913
    off_city:      CARDIFF
    off_zip:       CF1 3TH
    off_country:   UK
    off_phone:     UK+222-874289
! end of coverpage

abstract:

    line_1:        3C273 is one of the nearest known quasars and has a (relatively) high surface
    line_2:        brightness optical jet extending 25" from the nucleus. We expect that high
    line_3:        resolution optical polarization maps will reveal much structure unresolved from
    line_4:        the ground. These maps will be compared with computer simulations which include
    line_5:        the magnetic field. Radio polarization maps of comparable resolution will be
    line_6:        used to further define the physical state of the jet by providing
    line_7:        depolarization and rotation measure maps. By such means it is hoped to
    line_8:        identify the in situ acceleration mechanism powering the optical emission, and
    line_9:        to set limits on the properties of the surrounding medium.

!
! end of abstract

general_form_proposers:

  lname:           WRIGHT
    fname:         A.
    title:         DR.
    mi:            E.
    inst:          CSIRO, PARKES
    country:       AUSTRALIA

!

  lname:           THOMSON
    fname:         R.
    title:         P.I.
    mi:            C.
    inst:          INSTITUTE OF ASTRONOMY, CAMBRIDGE
    country:       UK
    esa:           X

!

  lname:           DISNEY
    fname:         M.
    mi:            J.
    inst:          UNIVERSITY OF WALES, CARDIFF
    country:       UK
    esa:           X

!
! end of general_form_proposers block

general_form_text:

  question:        3
    section:       1
    line_1:        To map the total intensity and polarization of the optical jet in the quasar
    line_2:        3C273 using the FOC in imaging mode (512x512 pixels) with filter F430W
    line_3:        (B band).  The exposures have been estimated to reveal areas of high
    line_4:        polarization (>5%) in resolution elements 0.1"x0.1" assuming a mean surface
    line_5:        brightness of 21.5 magnitudes per square arcsecond.  It is expected that
    line_6:        higher surface brightness features will be found.  The observations are to
    line_7:        carried at near zero roll angle with respect to the FOC/96 image aperture (ie,
    line_8:        North at top of frame), or rotated by a multiple of 90 degrees so that the jet
    line_9:        (position angle 223 degrees) falls diagonally across the frame.  All
    line_10:       exposures to be taken with the same roll angle.

!
!end of general form text

general_form_address:

  lname:           THOMSON
    fname:         ROBERT
    mi:            C.
    title:         DR.
    category:      PI
    inst:          INSTITUTE OF ASTRONOMY
    addr_1:        MADINGLEY ROAD
    city:          CAMBRIDGE
    zip:           CB3 0HA
    country:       UK
    phone:         UK+223-337548

!
! end of general_form_address records

fixed_targets:

    targnum:       1
    name_1:        3C273-JET
    descr_1:       GALAXY; QUASAR; JET
    pos_1:         RA=12H 29M 05.875S +/- 0.01S,
    pos_2:         DEC=+02D 02' 55.5" +/- 0.2",
    pos_3:         PLATE-ID=00BB
    equinox:       2000
    rv_or_z:       Z=0.158
    comment_1:     POSITION HAS BEEN MEASURED
    comment_2:     USING GASP WITH CCD IMAGE
    fluxnum_1:     1
    fluxval_1:     SURF(V)=21.5 +/- 0.5

!
! end of fixed targets

! No solar system records found

! No generic target records found

exposure_logsheet:

    linenum:       1.000
    targname:      3C273-JET
    config:        FOC/96
    opmode:        IMAGE
    aperture:      512X512
    sp_element:    F430W, POL0
    num_exp:       1
    time_per_exp:  145M
    s_to_n:        20
    fluxnum_1:     1
    priority:      1
    req_1:         ORIENT 296D +/- 10D;
    req_2:         SAME ORIENT FOR 2,3 AS 1;
    req_3:         GROUP 1-3 WITHIN 3D;
    req_4:         CYCLE 1/1-3
    comment_1:     INITIAL ORIENTATION CAN BE ROTATED
    comment_2:     BY MULTIPLE OF 90 DEGREES (IE;26,116,
    comment_3:     206,296D) TO ALIGN JET DIAGONALLY
    comment_4:     ACROSS THE FOV.  ORIENTATION FOR 2
    comment_5:     AND 3 MUST BE THE SAME AS FOR 1.
    comment_6:     OFFSET ANGLE USED = 206D.

!

    linenum:       2.000
    targname:      3C273-JET
    config:        FOC/96
    opmode:        IMAGE
    aperture:      512X512
    sp_element:    F430W, POL60
    num_exp:       1
    time_per_exp:  145M
    s_to_n:        20
    fluxnum_1:     1
    priority:      1

!

    linenum:       3.000
    targname:      3C273-JET
    config:        FOC/96
    opmode:        IMAGE
    aperture:      512X512
    sp_element:    F430W, POL120
    num_exp:       1
    time_per_exp:  145M
    s_to_n:        20
    fluxnum_1:     1
    priority:      1

!
! end of exposure logsheet

! No scan data records found