6220( 0) - 07/18/95 21:12 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6220 Version: ********** Check-in Date: ********** 1.Proposal Title: Ne VIII Emission in the QSO PG 1148+549 ------------------------------------------------------------------------------------ 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 UV spectra of the bright QSO PG 1148+549 (V=15.8, z=0.978) will be obtained to study the far UV emission lines. Low resolution IUE spectra show an emission line at the expected location of Ne VIII 770,780 emission. Ne VIII emission must come from a region of very high ionization and small Lyman continuum optical depth. The presence of Ne VIII emission could indicate a new emission component in the broad emission line region of QSOs beyond the conventional optically thick emission line clouds. These observations will also be used to measure the Ly alpha forest absorption near z = 1. ------------------------------------------------------------------------------------ 6220( 0) - 07/18/95 21:12 - [ 2] Observations Description ------------------------ We will use FOS/BL and the G130H, G190H, and G270H gratings to obtain spectra with complete wavelength coverage from ~1200 to ~3300 Angstrom in one QSO. We will use the Binary Search acquisition and the 1.0" aperture. We will use only FOS/BL (instead of FOS/RD for the G190H and G270H settings) because a side switch is too time consuming. For the exposure times given below, we expect SNRs per diode of ~15 for G130H and G190H and 25 for G270H (based on fluxes measured with the IUE) and the count rates given in version 5.0 of the FOS Manual (Fig. 1.2.3). Real Time Justification ----------------------- None. Calibration Justification ------------------------- We request that wavelength calibration lamps be taken with F190H and G130H grating settings to minimize the wavelength uncertainties caused by grating shifts. We request that the lamp exposures be obtained DURING OCCULTATION to maximize the science target exposure times. Additional Comments ------------------- ------------------------------------------------------------------------------------ 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 , ------------------------------------------------------------------------------------ 6220( 0) - 07/18/95 21:12 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PG1148+549 GALAXY, Quasar, BLR RA=11H 51M 20.44S +/- 0.3S, 2000 Z=0.97 V=15.82 DEC=54D 37' 32.8" +/- 0.5", B-V=0.3 F-CONT(800) = 1.0 +/- .4 E-14 F- PLATE-ID=00LK CONT(1550) = 5.3 +/- .3 E-15 6220( 0) - 07/18/95 21:12 - [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 PG1148+549 FOS/BL ACQ/BIN 4.3 MIRROR 1 15S ONBOARD ACQ FOR 2-7 ARY ------------------------------------------------------------------------------------------------------------------------------------ 2 PG1148+549 FOS/BL ACCUM 1.0 G130H 1200- 1 1570S EXPAND 1600 ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE FOS/BL ACCUM 1.0 G130H 1200- 1 DEF 1600 ------------------------------------------------------------------------------------------------------------------------------------ 4 PG1148+549 FOS/BL ACCUM 1.0 G130H 1200- 1 970S EXPAND 1600 ------------------------------------------------------------------------------------------------------------------------------------ 5 PG1148+549 FOS/BL ACCUM 1.0 G270H 2300- 1 350S MAX DUR 150% 3250 ------------------------------------------------------------------------------------------------------------------------------------ 6 PG1148+549 FOS/BL ACCUM 1.0 G190H 1580- 1 750S MAX DUR 150% 2330 ------------------------------------------------------------------------------------------------------------------------------------ 7 WAVE FOS/BL ACCUM 1.0 G190H 1580- 1 DEF 2330 ------------------------------------------------------------------------------------------------------------------------------------ 6220( 0) - 07/18/95 21:12 - [ 5] Summary Form for Proposal 6220 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/BL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/BINARY ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GTO/FOS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Quasars ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 2-7 EXPAND MAX DUR 150% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G130H G270H G190H ------------------------------------------------------------------------------------------------------------------------------------ Target Names PG1148+549 WAVE ------------------------------------------------------------------------------------------------------------------------------------