6217( 0) - 07/18/95 21:10 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6217 Version: ********** Check-in Date: ********** 1.Proposal Title: UV Spectra of the BL Lac Object AO 0235+164 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle QUASARS GTO/FOS 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: E. MARGARET BURBIDGE UNIVERSITY OF CALIFORNIA, SAN DIEGO CoI: GEORGE F. HARTIG SPACE TELESCOPE SCIENCE INSTITUTE N CoI: BRUCE H. MARGON UNIVERSITY OF WASHINGTON N CoI: RICHARD J. HARMS APPLIED RESEARCH CORPORATION N CoI: J. ROGER P. ANGEL UNIVERSITY OF ARIZONA N CoI: FRANK BARTKO UNAFFILIATED N CoI: EDWARD BEAVER UNIVERSITY OF CALIFORNIA, SAN DIEGO N CoI: RALPH C. BOHLIN SPACE TELESCOPE SCIENCE INSTITUTE N CoI: ARTHUR F. DAVIDSEN JOHNS HOPKINS UNIVERSITY N CoI: HOLLAND C. FORD SPACE TELESCOPE SCIENCE INSTITUTE N ------------------------------------------------------------------------------------ 6. 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. ------------------------------------------------------------------------------------ Observations 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. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6217( 0) - 07/18/95 21:10 - [ 2] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: ROSS COHEN*CASS 0111*9500 GILMAN DRIVE*LA JOLLA, CA 92093-0111 Ship Via: UPS Email: ross@cassfos03.ucsd.edu , ------------------------------------------------------------------------------------ 6217( 0) - 07/18/95 21:10 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 AO0235+164 GALAXY,BL LAC,EXT- RA=2H 38M 38.913S +/- 0.020S, J2000 Z = 0.94 V = 17.0 +/- 2.5 MEDIUM,ABSORPTION LINE DEC= 16D 36' 59.76" +/- 0.30", F(1800.0) = 8.0 +/- 4.0 E-17 SYSTEM,IGM PLATE-ID=01G9 6217( 0) - 07/18/95 21:10 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 AO0235+164 FOS/RD ACQ/PEA 4.3 MIRROR SEARCH-SIZE- 1 12.6S ONBOARD ACQ FOR 20; K Y=3, SCAN-STEP- Y=1.23, SEARCH- SIZE-X=1 ------------------------------------------------------------------------------------------------------------------------------------ 20 AO0235+164 FOS/RD ACQ/PEA 1.0 MIRROR SEARCH-SIZE- 1 13.9S ONBOARD ACQ FOR 30; K Y=2, SCAN-STEP- Y=0.61, SEARCH- SIZE-X=6, SCAN- STEP-X=0.61 ------------------------------------------------------------------------------------------------------------------------------------ 30 AO0235+164 FOS/RD ACQ/PEA 0.5 MIRROR SEARCH-SIZE- 1 15.1S ONBOARD ACQ FOR 35 K Y=3, SCAN-STEP- Y=0.29, SEARCH- SIZE-X=3, SCAN- STEP-X=0.29 ------------------------------------------------------------------------------------------------------------------------------------ 35 AO0235+164 FOS/RD ACQ/PEA 0.3 MIRROR SEARCH-SIZE-Y=3 1 20S ONBOARD ACQ FOR 40-50 K SCAN-STEP- Y=0.17 SEARCH- SIZE-X=3 SCAN- STEP-X=0.17 ------------------------------------------------------------------------------------------------------------------------------------ 40 AO0235+164 FOS/RD ACCUM 1.0 G160L 1600.0 1 11050S ------------------------------------------------------------------------------------------------------------------------------------ 50 AO0235+164 FOS/RD ACCUM 1.0 G270H 2700.0 1 4650S ------------------------------------------------------------------------------------------------------------------------------------ 6217( 0) - 07/18/95 21:10 - [ 5] Summary Form for Proposal 6217 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAK ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SEARCH-SIZE-Y=3 SCAN-STEP-Y=1.23 SEARCH-SIZE-X=1 SCAN-STEP-X=0.61 SCAN-STEP-X=0.29 SEARCH-SIZE-Y=3 SCAN-STEP-Y=0.17 SEARCH-SIZE-X=3 SCAN-STEP-X=0.17 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GTO/FOS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QUASARS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 20; ONBOARD ACQ FOR 30; ONBOARD ACQ FOR 35 ONBOARD ACQ FOR 40-50 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G160L G270H ------------------------------------------------------------------------------------------------------------------------------------ Target Names AO0235+164 ------------------------------------------------------------------------------------------------------------------------------------