6616( 5) - 05/09/96 11:13 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6616 Version: 5 Check-in Date: 09-May-1996 11:07:19 1.Proposal Title: UV SPECTROPOLARIMETRY OF NEARBY POWERFUL RADIO GALAXIES ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle AGN GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Andrea Cimatti Osservatorio Astrofisico di Arcetri CoI: Robert Antonucci Physics Dept., University of California at Y Santa Barbara CoI: Todd Hurt Physics Dept., University of California at N Santa Barbara CoI: Wil van Breugel Institute of Geophysics and Planetary N Physics, Lawrence Livermore National Lab. CoI: Arjun Dey Kitt Peak National Observatory N CoI: Hyron Spinrad Astronomy Dept., University of California N at Berkeley ------------------------------------------------------------------------------------ 6. Abstract Powerful radio galaxies provide the possibility of a variety of important astrophysical studies. In particular, the analysis of the UV polarized radiation is important to test the validity of the unification model of powerful radio-loud AGN and to disentangle the different components (stellar and non-stellar radiation). Despite the effort in the observation of the UV components in high redshift radio galaxies, their nature at low redshift has been poorly investigated. We propose to do FOS UV spectropolarimetry of three powerful radio galaxies with z~0.1-0.2. Cycle 6 provides the last opportunity to obtain this kind of astrophysical information. Our main scientific aims are to test the validity of the Unified Model of powerful radio-loud AGN and to analyse the continuum and emission line polarizations in order to understand the origin of the scattered radiation and the nature of the scattering particles. We will also make use of the total flux spectra (continuum and lines) in order to measure the relative importance of the various radiative components which contribute to the UV emission (stars, scattered radiation, non-thermal unpolarized radiation). Our observations will also allow us to compare the spectral and polarization properties of low and high redshift powerful radio galaxies in the same UV rest-frame spectral range. ------------------------------------------------------------------------------------ 6616( 5) - 05/09/96 11:13 - [ 2] Observations Description ------------------------ Our three galaxies were already observed with FOC+F320W in imaging polarimetry (GO 3790 and 4359; P.I. Antonucci). The data have been reduced and provided broad- band fluxes and polarizations at 3200 Angstrom. The following table summarizes the informations about our targets. begintabularlcccl & & & & , Galaxy & F_Lambda(3200 Angstrom) & P & Theta & previous observation , , & times10^- 16ergs^-1cm^-2Angstrom^-1&(\\%)&(deg)& , 3C 234 & 3.5 & 12.7+/-1.6 & 160+/-1 & FOC , 3C 321 & 0.9 & 8.8+/ -0.5 & 26+/-1 & FOC , 3C 327 & 0.9 & >=15 & & FOC , & & & & , & & & & , endtabular We plan to use FOS/BL + G270H + 1.0 aperture + waveplate B + 4 polarizer rotation angles (0,22.5,45, 67.5 degrees). The acquisition of the target will be made in ACQ/PEAK mode with FOS/RD and with a pointing accuracy of 0.2 arcsec (sequence A+B1+C1). The change of configuration from FOS/RD to FOS/BL will be made during the occultation. For 3C321 and 3C327, in order to have a final sigma_P ~1.3\\% per bin, we need SNR=12 per diode and spectral binning of 60 diodes (~120 Angstrom). For 3C234, because of its relative higher brightness, we request SNR=20 per diode, providing sigma_P ~1.0\\% in bins of 40 diodes (~80 Angstrom). The total integration time required for one target is t_total =t * 4, where t is estimated according to the prescriptions of the FOS Handbook Version 6.0. A complete polarization sequence (4 polarizer angles) will be completed in one orbit and repeated in the following orbits until the total required integration time is reached. The three targets will be also observed with grating G190H in standard spectroscopic mode (FOS/RD,1.0 aperture) in order to study the UV spectra in the region 1500-2200 AA , , Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: Andrea Cimatti, Osservatorio Astrofisico di Arcetri,*Largo E. Fermi 5, I-50125, Firenze, Italy Ship Via: UPS Email: cimatti@arcetri.astro.it , ------------------------------------------------------------------------------------ 6616( 5) - 05/09/96 11:13 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 01 3C234 GALAXY,RADIO RA= 10H 01M 49.54S +/- 0.1S, J2000 V = 16.89+/-0.1 GALAXY,ELLIPTICAL,QUASA DEC= +28D 47' 08.87" +/- 0.3", B-V = 1.64+/-0.1 R,NUCLEUS PLATE-ID=021H F(3200)=3.6+/-0.3e-16 Comments: coordinates derived from the DSS 02 3C321 GALAXY,RADIO RA= 15H 31M 43.60S +/- 0.1S, J2000 V = 15.82+/-0.1 GALAXY,ELLIPTICAL,NUCLE DEC= +24D 04' 18.74" +/- 0.3", F(3200)=1.0+/-0.1e-16 US PLATE-ID=0280 Comments: coordinates derived from the DSS 03 3C327 GALAXY,RADIO RA= 16H 02M 27.39S +/- 0.1S, J2000 V = 15.63+/-0.1 GALAXY,ELLIPTICAL,NUCLE DEC= +01D 57' 55.50" +/- 0.3", B-V = 1.51+/-0.1 US PLATE-ID=0082 F(3200)=1.0+/-0.1e-16 Comments: coordinates derived from the DSS 6616( 5) - 05/09/96 11:13 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: THE EXPOSURE TIMES OF THE ACQ/PEAK STAGES ARE RATHER UNCERTAIN BECAUSE OF LACK OF PHOTOMETRIC INFORMATIONS ON THIS TARGET Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 3C234 FOS/RD ACQ/PEA 4.3 MIRROR SCAN-STEP-Y=1.23,SEARCH-SIZE-Y=3, 1 8S ONBOARD ACQ FOR 20 K SEARCH-SIZE-X=1 Comments: STAGE 1 OF 3 STAGE PEAKUP WITH POINTING ACCURACY 0.21 ARCSEC ------------------------------------------------------------------------------------------------------------------------------------ 20 3C234 FOS/RD ACQ/PEA 1.0 MIRROR SCAN-STEP-Y=0.61,SCAN-STEP-X=0.61 1 15S ONBOARD ACQ FOR 30 K ,SEARCH-SIZE-Y=2,SEARCH-SIZE-X=6 Comments: STAGE 2 OF 3 STAGE PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ 30 3C234 FOS/RD ACQ/PEA 0.5 MIRROR SCAN-STEP-Y=0.29,SCAN-STEP-X=0.29 1 20S ONBOARD ACQ FOR 40-75 K ,SEARCH-SIZE-Y=3,SEARCH-SIZE-X=3 Comments: STAGE 3 OF 3 STAGE PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ 40 3C234 FOS/RD ACCUM 1.0 G190H 1 2350S Comments: OBSERVATION WITH GRATING G190H ------------------------------------------------------------------------------------------------------------------------------------ 50 3C234 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2170S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 55 3C234 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 60 3C234 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 65 3C234 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 70 3C234 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 75 3C234 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 6616( 5) - 05/09/96 11:13 - [ 5] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: THIS VISIT REQUIRES 10 ORBITS. OUR PROGRAM COORDINATOR (MARC BREMMER) SUGGESTS TO LEAVE 10 ORBITS IN THE PROPOSAL BECAUSE IT SHOULD BE POSSIBLE TO SCHEDULE THIS VISIT AND AVOID THE SAA. THE EXPOSURE TIMES OF THE ACQ/PEAK STAGES ARE RATHER UNCERTAIN BECAUSE OF LACK OF PHOTOMETRIC INFORMATIONS ON THIS TARGET Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 3C321 FOS/RD ACQ/PEA 4.3 MIRROR SCAN-STEP-Y=1.23,SEARCH-SIZE-Y=3, 1 8S ONBOARD ACQ FOR 20 K SEARCH-SIZE-X=1 Comments: STAGE 1 OF 3 STAGE PEAKUP WITH POINTING ACCURACY 0.21 ARCSEC ------------------------------------------------------------------------------------------------------------------------------------ 20 3C321 FOS/RD ACQ/PEA 1.0 MIRROR SCAN-STEP-Y=0.61,SCAN-STEP-X=0.61 1 15S ONBOARD ACQ FOR 30 K ,SEARCH-SIZE-Y=2,SEARCH-SIZE-X=6 Comments: STAGE 2 OF 3 STAGE PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ 30 3C321 FOS/RD ACQ/PEA 0.5 MIRROR SCAN-STEP-Y=0.29,SCAN-STEP-X=0.29 1 20S ONBOARD ACQ FOR 40-85 K ,SEARCH-SIZE-Y=3,SEARCH-SIZE-X=3 Comments: STAGE 3 OF 3 STAGE PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ 40 3C321 FOS/RD ACCUM 1.0 G190H 1 2350S Comments: OBSERVATION WITH GRATING G190H ------------------------------------------------------------------------------------------------------------------------------------ 50 3C321 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2170S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 55 3C321 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 60 3C321 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 65 3C321 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 70 3C321 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 75 3C321 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 80 3C321 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 85 3C321 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 6616( 5) - 05/09/96 11:13 - [ 6] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: THIS VISIT REQUIRES 10 ORBITS. OUR PROGRAM COORDINATOR (MARC BREMMER) SUGGESTS TO LEAVE 10 ORBITS IN THE PROPOSAL BECAUSE IT SHOULD BE POSSIBLE TO SCHEDULE THIS VISIT AND AVOID THE SAA. THE EXPOSURE TIMES OF THE ACQ/PEAK STAGES ARE RATHER UNCERTAIN BECAUSE OF LACK OF PHOTOMETRIC INFORMATIONS ON THIS TARGET Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 3C327 FOS/RD ACQ/PEA 4.3 MIRROR SCAN-STEP-Y=1.23,SEARCH-SIZE-Y=3, 1 8S ONBOARD ACQ FOR 20 K SEARCH-SIZE-X=1 Comments: STAGE 1 OF 3 STAGE PEAKUP WITH POINTING ACCURACY 0.21 ARCSEC ------------------------------------------------------------------------------------------------------------------------------------ 20 3C327 FOS/RD ACQ/PEA 1.0 MIRROR SCAN-STEP-Y=0.61,SCAN-STEP-X=0.61 1 15S ONBOARD ACQ FOR 30 K ,SEARCH-SIZE-Y=2,SEARCH-SIZE-X=6 Comments: STAGE 2 OF 3 STAGE PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ 30 3C327 FOS/RD ACQ/PEA 0.5 MIRROR SCAN-STEP-Y=0.29,SCAN-STEP-X=0.29 1 20S ONBOARD ACQ FOR 40-85 K ,SEARCH-SIZE-Y=3,SEARCH-SIZE-X=3 Comments: STAGE 3 OF 3 STAGE PEAKUP ------------------------------------------------------------------------------------------------------------------------------------ 40 3C327 FOS/RD ACCUM 1.0 G190H 1 2350S Comments: OBSERVATION WITH GRATING G190H ------------------------------------------------------------------------------------------------------------------------------------ 50 3C327 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2170S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 55 3C327 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 60 3C327 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 65 3C327 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 70 3C327 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 75 3C327 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 80 3C327 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 85 3C327 FOS/BL ACCUM 1.0 G270H POLSCAN=4B 1 2200S Comments: POLARIMETRY OBSERVATION WITH GRATING G270H ------------------------------------------------------------------------------------------------------------------------------------ 6616( 5) - 05/09/96 11:13 - [ 7] Summary Form for Proposal 6616 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOS/RD FOS/BL ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/PEAK ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SCAN-STEP-Y=1.23 SEARCH-SIZE-Y=3 SEARCH-SIZE-X=1 SEARCH-SIZE-X=6 SEARCH-SIZE-X=3 POLSCAN=4B SEARCH-SIZE-Y=2 SCAN-STEP-X=0.29 SCAN-STEP-X=0.61 SCAN-STEP-Y=0.29 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category AGN ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 20 ONBOARD ACQ FOR 30 ONBOARD ACQ FOR 40-75 ONBOARD ACQ FOR 40-85 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G190H G270H ------------------------------------------------------------------------------------------------------------------------------------ Target Names 3C234 3C321 3C327 ------------------------------------------------------------------------------------------------------------------------------------