7356(  3) - 06/27/97 11:25  - [  1]

    PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS   ST ScI Use Only
                                                       ID:      7356
                                                       Version: 3
                                                       Check-in Date: 27-Jun-1997
                                                                      11:24:14

1.Proposal Title:
Intrinsic UV and X-ray Absorption in QSOs
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2. Scientific Category   3. Proposal For  4. Cycle
AGN/QUASARS                 GO               7
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5. Investigators
                                                                                     Contact?
    PI: Frederick Hamann                  UNIVERSITY OF CALIFORNIA AT SAN DIEGO
   CoI: Hagai Netzer                      School of Physics and Astronomy, Tel Aviv     N
                                          University
   CoI: Joseph Shields                    Ohio University                               N

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6. Abstract

Intrinsic UV absorption lines in QSOs could identify ubiquitous and relatively
massive gas components near QSOs. Most of the absorption lines are blueshifted and
clearly form in high-velocity ejecta, but little else is known about the physical
nature of the absorbers. Several low-redshift QSOs and Seyfert 1 galaxies exhibit
blueshifted absorption lines plus continuous soft X-ray absorption due to highly
ionized gas (the so-called "warm" absorber), which has lead to speculation that the
UV and X-ray features identify the same environment. We propose STIS observations of
the "associated" (za~ze) lines in a small number of QSOs with redshifts (0.5<z<1.0)
that are high enough to measure all the important UV lines with HST, including the
high-ionization O VI 1032,1037 and Ne VIII 770,780 doublets, yet low enough to allow
follow-up soft X-ray observations of the warm absorbers with the coming satellite
missions AXAF and XMM. We will use the HST-STIS data to (1) measure or constrain the
column densities in various ions, ranging from Ne VIII to C II, to derive the
ionization state(s) of the gas and test the relationship between the UV and X-ray
absorbers, (2) derive the first accurate metal abundances in low-redshift QSOs and
examine the implications for the host galaxy evolution, (3) study the outflow
dynamics and acceleration mechanisms, and (4) compare the results across a wide
range of redshifts and luminosities.
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                                                7356(  3) - 06/27/97 11:25  - [  2]

  Observations Description
  ------------------------

     Following the recommendations of the TAC, we will obtain STIS spectra of 1 QSO.

  Real Time Justification
  -----------------------

     None. AXAF observations of the same sources will be proposed in 1997 to
     measure/constrain the soft X-ray absorption. The future X-ray observations
     provide strong motivation for the current proposal, but the HST data alone will
     provide new and significant information on the physical conditions and chemical
     abundances in the intrinsic absorption line systems.

  Calibration Justification
  -------------------------


  Additional Comments
  -------------------

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  Data Distribution

  Media:           ELECTRONIC
  Blocking Factor: 10
  Ship To:         PI_Address
  Ship Via:
  Email:
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                                                7356(  3) - 06/27/97 11:25  - [  3]

TARGET LIST    a) Fixed Targets
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Tar|   Target   |         Target        |            Target              |Coord   | Radial |             Flux data
No |    Name    |       Description     |           Position             |Eqnx    |  Vel.  |
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1   3C288-1      GALAXY,QUASAR           RA=13H 42M 13.25S +/-            J2000    Z=0.961  V = 18.12
                                         0.30S,DEC=60D 21' 42.9" +/-                        B-V = 0.39
                                         0.5",PLATE-ID=01R0

                                                7356(  3) - 06/27/97 11:25  - [  4]

Visit: 01
     Visit Requirements:  <none>
     On Hold Comments:    <none>
     Additional Comments: <none>


Exposures
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Exposure|   Target  |Instr | Oper. | Aper  |Spectral|Central|             Optional            |Num|  Time |       Special
 Number |    Name   |Config| Mode  |or FOV |Element |Waveln.|            Parameters           |Exp|       |     Requirements
------------------------------------------------------------------------------------------------------------------------------------
1        3C288-1     STIS/C ACQ     F28X50L MIRROR           ACQTYPE=POINT                     1   5.0 S   ONBOARD ACQ FOR 2-7
                     CD             P
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2        3C288-1     STIS/C ACQ/PEA 52X0.2  MIRROR                                             1   8.0 S   ONBOARD ACQ FOR 3-7
                     CD     K
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3        3C288-1     STIS/F ACCUM   52X0.2  G140L    1425                                      1   2300.0  EXPAND END ORBIT
                     UV-MAM
                     A
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4        3C288-1     STIS/F ACCUM   52X0.2  G140L    1425                                      1   2900.0  EXPAND END ORBIT
                     UV-MAM
                     A
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5        3C288-1     STIS/F ACCUM   52X0.2  G140L    1425                                      1   2900.0  EXPAND END ORBIT
                     UV-MAM
                     A
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6        3C288-1     STIS/F ACCUM   52X0.2  G140L    1425                                      1   2900.0  EXPAND END ORBIT
                     UV-MAM
                     A
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7        3C288-1     STIS/F ACCUM   52X0.2  G140L    1425                                      1   2900.0  EXPAND END ORBIT
                     UV-MAM
                     A
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                                                7356(  3) - 06/27/97 11:25  - [  5]

Visit: 02
     Visit Requirements:  <none>
     On Hold Comments:    <none>
     Additional Comments: <none>


Exposures
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Exposure|   Target  |Instr | Oper. | Aper  |Spectral|Central|             Optional            |Num|  Time |       Special
 Number |    Name   |Config| Mode  |or FOV |Element |Waveln.|            Parameters           |Exp|       |     Requirements
------------------------------------------------------------------------------------------------------------------------------------
1        3C288-1     STIS/C ACQ     F28X50L MIRROR           ACQTYPE=POINT                     1   5.0 S   ONBOARD ACQ FOR 2-5
                     CD             P
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2        3C288-1     STIS/C ACQ/PEA 52X0.2  MIRROR                                             1   8.0 S   ONBOARD ACQ FOR 3-5
                     CD     K
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3        3C288-1     STIS/N ACCUM   52X0.2  G230L    2376                                      1   2300.0  EXPAND END ORBIT
                     UV-MAM
                     A
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4        3C288-1     STIS/N ACCUM   52X0.2  G230L    2376                                      1   2900.0  EXPAND END ORBIT
                     UV-MAM
                     A
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5        3C288-1     STIS/N ACCUM   52X0.2  G230L    2376                                      1   2900.0  EXPAND END ORBIT
                     UV-MAM
                     A
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                                                7356(  3) - 06/27/97 11:25  - [  6]

            Summary Form for Proposal  7356

  Item                         Used in this proposal
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  Configurations               STIS/CCD STIS/FUV-MAMA STIS/NUV-MAMA
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  Opmodes                      ACQ ACQ/PEAK ACCUM
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  Optional Parameters          ACQTYPE=POINT
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  Proposal Category            GO
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  Scientific Category          AGN/QUASARS
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  Special Requirements         ONBOARD ACQ FOR 2-7 ONBOARD ACQ FOR 3-7 EXPAND END ORBIT ONBOARD ACQ FOR 2-5 ONBOARD ACQ FOR 3-5
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  Spectral Elements            MIRROR G140L G230L
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  Target Names                 3C288-1
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