Proposal_Information

              Title: UV Spectra of the BL Lac Object AO 0235+164
  Proposal_Category: GTO/FOS
Scientific_Category: QUASARS
              Cycle: 5


Investigators

        PI_name: E. MARGARET BURBIDGE
 PI_Institution: UNIVERSITY OF CALIFORNIA, SAN DIEGO

       CoI_Name: RICHARD J. HARMS
CoI_Institution: APPLIED RESEARCH CORPORATION

       CoI_Name: J. ROGER P. ANGEL
CoI_Institution: UNIVERSITY OF ARIZONA

       CoI_Name: FRANK BARTKO
CoI_Institution: UNAFFILIATED

       CoI_Name: EDWARD BEAVER
CoI_Institution: UNIVERSITY OF CALIFORNIA, SAN DIEGO

       CoI_Name: RALPH C. BOHLIN
CoI_Institution: SPACE TELESCOPE SCIENCE INSTITUTE

       CoI_Name: ARTHUR F. DAVIDSEN
CoI_Institution: JOHNS HOPKINS UNIVERSITY

       CoI_Name: HOLLAND C. FORD
CoI_Institution: SPACE TELESCOPE SCIENCE INSTITUTE

       CoI_Name: GEORGE F. HARTIG
CoI_Institution: SPACE TELESCOPE SCIENCE INSTITUTE

       CoI_Name: BRUCE H. MARGON
CoI_Institution: UNIVERSITY OF WASHINGTON


Questions

Observing_Description:
Because this is a highly variable target, a peak-up target acquisition is required.
This will be a 1 by 3 in the 4.3" aperture, a 2 by 6 in the 1.0" aperture, and a 3
by 3 in the 0.5" aperture.  Peak up exposure times are calculated assuming V=19.5
and F(nu) proportional to nu^-1.  Observations will be made with the 1" aperture at
relatively low s/n, so centering in the 0.5" aperture is adequate.

Abstract:
AO0235+164 is an unusual case of a BL Lac object with very weak emission lines, 2
metallic line absorptions at z = 0.524, 0.851, and variable 21-cm absorption at
z = 0.524. It has a faint emission-line companion 2 arc sec south with z = 0.524
and another companion 1.3 arc sec East. Goals for this program will be  examination
of Lyman alpha absorption at both absorption redshifts and search for UV emission
lines.  


Fixed_Targets

Target_Number: 1
  Target_Name: AO0235+164
  Description: GALAXY,BL LAC,EXT-MEDIUM,ABSORPTION LINE SYSTEM,IGM
     Position: RA=2H 38M 38.913S +/- 0.020S,
               DEC= 16D 36' 59.76" +/-  0.30",
               PLATE-ID=01G9
      Equinox: J2000
      Rv_or_z: Z = 0.94
         Flux: V = 17.0 +/- 2.5,
               F(1800.0) = 8.0 +/- 4.0 E-17


Visits

Visit_Number: 01

   ! From Line 5
     Exposure_number: 10
         Target_Name: AO0235+164
              Config: FOS/RD
              Opmode: ACQ/PEAK
            Aperture: 4.3
          Sp_Element: MIRROR
 Optional_Parameters: SEARCH-SIZE-Y=3,
                      SCAN-STEP-Y=1.23,
                      SEARCH-SIZE-X=1
Number_of_iterations: 1
   Time_Per_Exposure: 12.6S
Special_Requirements: ONBOARD ACQ FOR 20;

   ! From Line 5.1
     Exposure_number: 20
         Target_Name: AO0235+164
              Config: FOS/RD
              Opmode: ACQ/PEAK
            Aperture: 1.0
          Sp_Element: MIRROR
 Optional_Parameters: SEARCH-SIZE-Y=2,
                      SCAN-STEP-Y=0.61,
                      SEARCH-SIZE-X=6,
                      SCAN-STEP-X=0.61
Number_of_iterations: 1
   Time_Per_Exposure: 13.9S
Special_Requirements: ONBOARD ACQ FOR 30;

   ! From Line 5.2
     Exposure_number: 30
         Target_Name: AO0235+164
              Config: FOS/RD
              Opmode: ACQ/PEAK
            Aperture: 0.5
          Sp_Element: MIRROR
 Optional_Parameters: SEARCH-SIZE-Y=3,
                      SCAN-STEP-Y=0.29,
                      SEARCH-SIZE-X=3,
                      SCAN-STEP-X=0.29
Number_of_iterations: 1
   Time_Per_Exposure: 15.1S
Special_Requirements: ONBOARD ACQ FOR 35

     Exposure_number: 35
         Target_Name: AO0235+164
              Config: FOS/RD
              Opmode: ACQ/PEAK
            Aperture: 0.3
          Sp_Element: MIRROR
 Optional_Parameters: SEARCH-SIZE-Y=3
                      SCAN-STEP-Y=0.17
                      SEARCH-SIZE-X=3
                      SCAN-STEP-X=0.17
Number_of_iterations: 1
   Time_Per_Exposure: 20S
Special_Requirements: ONBOARD ACQ FOR 40-50

   ! From Line 7
     Exposure_number: 40
         Target_Name: AO0235+164
              Config: FOS/RD
              Opmode: ACCUM
            Aperture: 1.0
          Sp_Element: G160L
          Wavelength: 1600.0
Number_of_iterations: 1
   Time_Per_Exposure: 11050S

   ! From Line 6
     Exposure_number: 50
         Target_Name: AO0235+164
              Config: FOS/RD
              Opmode: ACCUM
            Aperture: 1.0
          Sp_Element: G270H
          Wavelength: 2700.0
Number_of_iterations: 1
   Time_Per_Exposure: 4650S


Data_Distribution

         Medium: 8MM
Blocking_Factor: 10
        Ship_To: ROSS COHEN
                 CASS 0111
                 9500 GILMAN DRIVE
                 LA JOLLA, CA 92093-0111
       Ship_Via: UPS
Recipient_Email: ross@cassfos03.ucsd.edu