!   $Id: 5345,v 9.1 1994/08/22 15:38:04 pepsa Exp $
COVERPAGE:
  TITLE_1:  The jet/beam - cloud interaction in PKS 2152-699
  SCI_CAT:  Quasars & AGN
  SCI_SUBCAT:  Radio Galaxies
  PROPOSAL_FOR:  GO
  LARGE_PROJ:
  KEY_PROJ:
  TARG_OF_OPP:
  REALTIME:
  TIME_CRIT:
  PI_FNAME: Robert
  PI_LNAME: Fosbury
  PI_INST: 5555
  PI_COUNTRY: Germany
  PI_PHONE: +49 89 320 06 235
  HOURS_PRI:  3.33
  HOURS_PAR:  0
  NUM_PRI: 1
  NUM_PAR: 0
  WF_PC: Y
  OFF_FNAME: Piero
  OFF_LNAME: Benvenuti
  OFF_TITLE: Head, ST-ECF
  OFF_INST: 5555
  OFF_ADDR_1: ST-ECF
  OFF_ADDR_2: Karl-Schwarzschild Str. 2
  OFF_CITY: Garching b. Muenchen
  OFF_ZIP: D-85748
  OFF_COUNTRY: Germany
  OFF_PHONE: +49 89 320 06 290
ABSTRACT:
LINE_1: This is a proposal to add a vital datum to an already considerable
LINE_2: dataset describing the jet/beam - cloud interaction in the radio galaxy
LINE_3: PKS 2152-69. The interception of a blazar (photon) beam by a small,
LINE_4: gas-rich companion galaxy has produced a wealth of physical phenomena
LINE_5: which we have studied from radio to X-ray wavelengths. The gas in the
LINE_6: companion has become highly ionized (up to Fe9+) and the dust is
LINE_7: scattering the photon beam. The full understanding of this phenomenon
LINE_8: allows us to derive important properties of the photon beams and,
LINE_9: possibly, particle jets which are a part of the radio-loud AGN
LINE_10:phenomenon. We intend to use the WFPC2 with two ultraviolet filters
LINE_11:to image the cloud in strong emission line free regions around 3000A
LINE_12:and 1600A to determine the ultraviolet continuum energy distribution
LINE_13:which is already known at long UV wavelengths from IUE. In the longer
LINE_14:of the filters, we will measure the linear polarization in order to
LINE_15:determine its wavelength dependence in conjunction with our existing
LINE_16:B-band measurement. The diagnosis of the scattering mechanism is
LINE_17:important for the understanding of the 'alignment effect' in high
LINE_18:redshift radio galaxies.
GENERAL_FORM_PROPOSERS:
  LNAME: FOSBURY
  FNAME: Robert
  INST: 5555
  COUNTRY: Germany
  ESA: Y
  LNAME: DI SEREGO ALIGHIERI
  FNAME: SPERELLO
  INST: 6420
  COUNTRY: Italy
  ESA: Y
  LNAME: COURVOISIER
  FNAME: THIERRY
  INST: 7850
  COUNTRY: Switzerland
  ESA: Y
  LNAME: TADHUNTER
  FNAME: Clive
  INST: University of Sheffield
  COUNTRY: UK
  ESA: Y
  LNAME: BINETTE
  FNAME: Luc
  INST: 4666
  COUNTRY: Canada
  ESA:
  LNAME: BEDDING
  FNAME: TIMOTHY
  INST: 5520
  COUNTRY: Germany
  ESA: Y
  LNAME: Wilson
  FNAME: Warwick
  INST: 4125
  COUNTRY: Australia
  ESA:
GENERAL_FORM_ADDRESS:
  LNAME: Fosbury
  FNAME: Robert
  CATEGORY:     PI
  INST: 5555
  ADDR_1: ST-ECF
  ADDR_2: Karl-Schwarzschild Str. 2
  CITY: Garching b. Muenchen
  ZIP: D-85748
  COUNTRY: Germany
  PHONE: +49 89 320 06 235
  TELEX: rfosbury@eso.org
GENERAL_FORM_TEXT:
 QUESTION:  3
  SECTION:  1
LINE_1:   The observation consists of two parts: Linear
LINE_2:   polarization measurements with F300W + POLQ
LINE_3:   and pure imaging with F160BW. All observations
LINE_4:   are to be taken with WFC using 2x2 on-chip
LINE_5:   binning. Each filter (polarization angle)
LINE_6:   consists of two ~1200S exposures (each with CR-SPLIT)
LINE_7:   with a relative shift of 1 (unbinned) pixel (0.1")
LINE_8:   in both X and Y between the two parts. All the
LINE_9:   polarization observations should be done with
LINE_10:  the SAME (arbitrary) orientation. The F160BW
LINE_11:  pair (which have slightly longer exposures)
LINE_12:  should also be done with the same orientation
LINE_13:  although this NEED not be the same as F300W/POLQ.
LINE_14:  If there is no scheduling problem, it would help
LINE_15:  analysis to have the same orientation for ALL the
LINE_16:  exposures.
LINE_17:  NB. Following the circular by M Clampin about the
LINE_18:  Wood's filter, we have changed the UV filter from 160BW
LINE_19:  to F218W. This produces an estimated red-leak of
LINE_20:  less than 1% for our source and is essentially
LINE_21:  free of emission line contamination.
 QUESTION:  4
  SECTION:  1
LINE_1:   We have obtained an extensive set of observations
LINE_2:   of the radio galaxy and of the HIC using ground-
LINE_3:   based optical and radio telescopes, IUE and Rosat
LINE_4:   (Tadhunter et al., 1987 and 1988, di Serego
LINE_5:   Alighieri et al., 1988, Fosbury et al., 1990,
LINE_6:   Fosbury et al. in prep, see section 2). In
LINE_7:   particular we have imaged the HIC in the
LINE_8:   continuum down to the atmospheric limit at 3250 A
LINE_9:   and in the H alpha and [OIII]5007 emission lines.
LINE_10:  We have obtained the UV spectral energy
LINE_11:  distribution of the cloud down to about 2500 A
LINE_12:  and its total Lyman alpha flux with IUE. We have
LINE_13:  measured the polarization of the continuum source
LINE_14:  in the cloud by pushing near its limits one of
LINE_15:  the most efficient imaging polarizers available
LINE_16:  (EFOSC at the 3.6m ESO telescope). We have done
LINE_17:  this in the B band, the only wavelength where it
LINE_18:  is possible from the ground since the cloud
LINE_19:  becomes rapidly fainter in the red and EFOSC is
LINE_20:  not efficient below 4000 A. Therefore we need the
LINE_21:  UV sensitivity of the HST both to extend the
LINE_22:  study of the spectral energy distribution to
LINE_23:  shorter wavelengths and to measure the dependence
QUESTION:  4
  SECTION:  2
LINE_1:   of the polarization on the wavelength.  We also
LINE_2:   need the high angular resolution of the HST to
LINE_3:   study the spatial distribution of the continuum
LINE_4:   source.  We have obtained high resolution radio
LINE_5:   maps at 3.5 and 6.3 cm with the Australia
LINE_6:   Telescope, which show a radio counterpart of the
LINE_7:   cloud, and demonstrate that the inner radio jet
LINE_8:   does indeed point exactly to the cloud. The Rosat
LINE_9:   HRI image shows a 5-sigma source coincident with
LINE_10:  the cloud and at the same flux level relative to
LINE_11:  the X-ray nucleus as seen at radio frequencies.
LINE_12:  Unpublished VLBI data (SHEVE experiment, Meier,
LINE_13:  Reynolds, private communication) show a nuclear
LINE_14:  radio source elongated towards the HIC.  From all
LINE_15:  of these data we have precise astrometry relative
LINE_16:  to an accurate, very high precision VLBI nucleus.
 QUESTION:  5
  SECTION:  1
LINE_1:   With a declination of (J2000) -69D 41', the source
LINE_2:   may be available in the CVZ.
 QUESTION:  6
  SECTION:  1
LINE_1:   The UV passband filters we use are in the list
LINE_2:   of recommended filters by Mark Clampin. We assume
LINE_3:   that the POLQ throughput will be calibrated.
 QUESTION:  8
  SECTION:  1
LINE_1:
 QUESTION:  9
  SECTION:  1
LINE_1:   P2719: PAGB STARS IN ELLIPTICAL AND BULGE DOMINATED
LINE_2:   NEARBY GALAXIES (Di Serego, PI is F. Bertola).
LINE_3:   It is not related to this project.
LINE_4:   P3728:IMAGING THE HOT STELLAR CONTENT OF EARLY
LINE_5:   --TYPE GALAXIES (Di Serego, P.I. F. Bertola).
LINE_6:   It is not related to this project.
LINE_7:   P2498: THE NARROW AND VARIABLE EMISSION LINES
LINE_8:   IN NGC 4151 ( Fosbury, PI Ulrich).
 QUESTION:  10
  SECTION:  1
LINE_1:   PI and all Co-Is have adequate data analysis facilities
LINE_2:   at their institutes. In particular, the ST-ECF has access
LINE_3:   to full recalibration facilities and has extensive WFPC
LINE_4:   image processing experience.
FIXED_TARGETS:
  TARGNUM:        1
  NAME_1:         PKS2152-69-NEB
  DESCR_1:        E,315,316,907,922,927
  POS_1:          RA = 21H 57M 7.204S +/- 0.007S,
  POS_2:          DEC = -69D 41' 15.53" +/- 0.02"
  EQUINOX:        2000
  PM_OR_PAR:
  RV_OR_Z:        Z = 0.028
  FLUXNUM_1:      1
  FLUXVAL_1:      F-CONT(3000) = 3.0 +/- 0.6 E-16
  FLUXNUM_2:      2
  FLUXVAL_2:      F-CONT(1600) = 1.3 E-16
  COMMENT_1:      The extent of the cloud continuum
  COMMENT_2:      source is not known but is less
  COMMENT_3:      than 2" square and probably highly
  COMMENT_4:      structured. The 1600 A continuum
  COMMENT_5:      flux assumed is a factor of 4 below
  COMMENT_6:      the IUE upper limit.
  COMMENT_7:      This is a (marginal) CVZ target.
EXPOSURE_LOGSHEET:
  LINENUM:         1.1
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        WF2
  SP_ELEMENT:      F300W, POLQ
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1200S
  S_TO_N:          60
  S_TO_N_TIME:     2400S
  FLUXNUM_1:       1
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 1.2-4.2 AS 1.1
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4X600 SEC EXPOSURES.
  LINENUM:         1.2
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        WF2
  SP_ELEMENT:      F300W, POLQ
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1200S
  S_TO_N:          60
  S_TO_N_TIME:     2400S
  FLUXNUM_1:       1
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 1.2-4.2 AS 1.1;
  REQ_3:           POS TARG 0.9, 0.9
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4X600 SEC EXPOSURES.
  LINENUM:         2.1
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        WF3
  SP_ELEMENT:      F300W, POLQ
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1200S
  S_TO_N:          60
  S_TO_N_TIME:     2400S
  FLUXNUM_1:       1
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 1.2-4.2 AS 1.1
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4X600 SEC EXPOSURES.
  LINENUM:         2.2
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        WF3
  SP_ELEMENT:      F300W, POLQ
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1200S
  S_TO_N:          60
  S_TO_N_TIME:     2400S
  FLUXNUM_1:       1
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 1.2-4.2 AS 1.1;
  REQ_3:           POS TARG 0.9, 0.9
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4X600 SEC EXPOSURES.
  LINENUM:         3.1
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        WF4
  SP_ELEMENT:      F300W, POLQ
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1200S
  S_TO_N:          60
  S_TO_N_TIME:     2400S
  FLUXNUM_1:       1
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 1.2-4.2 AS 1.1
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4X600 SEC EXPOSURES.
  LINENUM:         3.2
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        WF4
  SP_ELEMENT:      F300W, POLQ
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1200S
  S_TO_N:          60
  S_TO_N_TIME:     2400S
  FLUXNUM_1:       1
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 1.2-4.2 AS 1.1;
  REQ_3:           POS TARG 0.9, 0.9
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4X600 SEC EXPOSURES.
  LINENUM:         4.1
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        POLQN33
  SP_ELEMENT:      F300W, POLQN33
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1200S
  S_TO_N:          60
  S_TO_N_TIME:     2400S
  FLUXNUM_1:       1
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 1.2-4.2 AS 1.1
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4X600 SEC EXPOSURES.
  LINENUM:         4.2
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        POLQN33
  SP_ELEMENT:      F300W, POLQN33
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1200S
  S_TO_N:          60
  S_TO_N_TIME:     2400S
  FLUXNUM_1:       1
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 1.2-4.2 AS 1.1;
  REQ_3:           POS TARG 0.9, 0.9
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4X600 SEC EXPOSURES.
  LINENUM:         5.1
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        WF2
  SP_ELEMENT:      F218W
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1300S
  S_TO_N:          16
  S_TO_N_TIME:     2600S
  FLUXNUM_1:       2
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 5.2 AS 5.1
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4 EXPOSURES.
  COMMENT_4:       ASSUMES WF2 BEST FOR UV.
  LINENUM:         5.2
  TARGNAME:        PKS2152-69-NEB
  CONFIG:          WFPC2
  OPMODE:          IMAGE
  APERTURE:        WF2
  SP_ELEMENT:      F218W
  PARAM_1:         CR-SPLIT=0.5,
  PARAM_2:         CR-TOLERANCE=0.0,
  PARAM_3:         SUM=2X2,
  PARAM_4:         ATD-GAIN=7
  NUM_EXP:         1
  TIME_PER_EXP:    1300S
  S_TO_N:          16
  S_TO_N_TIME:     2600S
  FLUXNUM_1:       2
  PRIORITY:        1
  REQ_1:           CYCLE 4;
  REQ_2:           SAME ORIENT FOR 5.2 AS 5.1;
  REQ_3:           POS TARG 0.9, 0.9
  COMMENT_1:       S/N CALCULATED ASSUMING FLUX FALLS
  COMMENT_2:       ON 5 2X2 BINNED PIXELS. IT ALSO
  COMMENT_3:       ASSUMES 4 EXPOSURES.
  COMMENT_4:       ASSUMES WF2 BEST FOR UV.
!~~~RPSS~~~,FOSBURY,5345.prop, 7-MAR-1994 05:44