5923( 9) - 11/16/95 17:33 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 5923 Version: 9 Check-in Date: ********** 1.Proposal Title: The Structure of The Emission Line Regions of Compact Steep Spectrum Radio Sources. ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle AGN GO 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: David J. Axon Space Telescope Science Institute CoI: Andrew Robinson Institute of Astronomy, Cambridge N University CoI: Ralph Spencer Nuffield Radio Astronomy Laboratories N CoI: Hardip Sanghera Netherlands Foundation for Research in N Astronomy ------------------------------------------------------------------------------------ 6. Abstract Extended emission line regions (EELR) aligned with the radio structure have been found in AGN of all radio powers and redshifts. This alignment implies that the nuclear radiation is collimated. Generally the EELR of Seyfert galaxies stretch many Kpc beyond their radio structure and their ionization structure is dominated by the form of the nuclear radiation. In contrast the EELR in powerful radio sources are co-spatial with the radio structure. There, interactions with the radio ejecta are an important source of excitation. This contribution severly limits our ability to use the EELR as an aspect independent method of determining the role of beaming at high luminosity. The Compact Steep Spectrum sources have quasi-linear radio structure confined to small angular (<= 0.2 -1.5 '') and spatial scales (<= 10 Kpc). We believe that anisotropic radiation will excite EELR beyond the CSS radio emission, providing a high radio luminosity sample in which these effects are decoupled. This will allow a direct study of beaming in gas which is not interacting with the radio ejecta for a sample of sources with a wind range of intrinsic powers. In contrast on scales Co-spatial with the radio structure we expect to see the strong interactions manifested as NLR. We have already developed a true dynamical model for the formation of the NLR in Seyferts which explains both their velocity field and morphology. Resolving the emission structure of CSS and comparing this with the radio structure is essential in extending this modeling to the regime of more powerful ionizing radiation field and very large shock velocities. In principal finding and measuring displacemnts between the gas and radio emission in this region gives cooling times and hence shock velocities. Here we propose WFPC/2 emission line imagery of the CSS in CIV or OIII5007 to establish their emission line structure and its relationship to the radio structure. ------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 2] Observations Description ------------------------ We propose a program of narrow band imaging of CSS with the WFPC2 to allow us to establish the emmision line structure of the sources. We have chosen a representative sub-sample of objects which stradle a wide a range of redshift/radio power as possible from those studied previously with MERLIN. These include both QSO's and radio galaxies. Our observing stratergy will be to make two exposures per source using available ramp filters to isolate either CIV at intermediate z and OIII5007 in the low z subsets and and the continuum emission. We have calculated the exposure times from the ground based spectroscopy using a toy model in which the gas is confined to a cylinder aligned with the radio axis, and whose length corresponds to the size of the observed region, typically 2-5 arcseconds. We have designed our programme so as to reach a limiting surface brightness of 10^(-15) erg cm^ -2 s^-1 per pixel. Even if we then fail to detect ENLR the NLR structure will still be well measured. As it stands the programme is a large one, and we regard this as the optimuum sample. Some part of the programme can however be accomplished with a smaller allocation at the cost of z range. Follow on spectroscopy will be deffered until HST longslit capabilities are restored with STIS. Real Time Justification ----------------------- None The data will be reduced using the standard FOS pipeline processing and standard packages such as IRAF/STSDAS. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 3C48 Galaxy, Radio Galaxy RA=01H 37M 41.30S +/- 0.05S, 2000 V=16.2+/- 0.1 DEC=33D 09' 35.39" +/- 0.05" 2 3C303.1 Galaxy, Radio Galaxy RA=14H 43M 14.44S +/- 0.05S, 2000 V=19.0+/- 0.5 DEC=77D 07' 22.6" +/- 0.05" 3 3C277.1 Galaxy, Radio Galaxy RA=12H 52M 26.38S +/- 0.05S, 2000 V=17.2+/- 0.5 DEC=56D 34' 19.41" +/- 0.05" 4 3C147 Galaxy, Radio Galaxy RA=05H 42M 36.12S +/- 0.05S, 2000 V=16.9+/- 0.5 DEC=49D 51' 07.178" +/- 0.05" 5 4C12.50 Galaxy, Radio Galaxy RA=13H 47M 33.36S +/- 0.05S, 2000 V=17.2+/- 0.5 DEC=12D 17' 24.2" +/- 0.05" 6 3C268.3 Galaxy, Radio Galaxy RA=12H 06M 24.71S +/- 0.05S, 2000 V=17.2+/- 0.5 DEC=64D 14' 40.94" +/- 0.05" 7 3C454.1 Galaxy, Radio Galaxy RA=22H 50M 32.59S +/- 0.05S, 2000 V=17.8+/- 0.5 DEC=71D 29' 19.06" +/- 0.05" 5923( 9) - 11/16/95 17:33 - [ 4] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: JUST makes sure MIN DUR =1100 AND ALL OBS FIT INTO 2 ORBITS Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 3C48 wfpc2 image LRF LRF 6845 CR-SPLIT=NO 1 1100S MIN DUR 1100S ------------------------------------------------------------------------------------------------------------------------------------ 2 3C48 wfpc2 image LRF LRF 6845 CR-SPLIT=NO 1 1100S EXPAND MIN DUR 1100S MAX DUR 1300S END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ 3 3C48 wfpc2 image LRF LRF 6845 CR-SPLIT=NO 1 1100S MIN DUR 1100S ------------------------------------------------------------------------------------------------------------------------------------ 4 3C48 wfpc2 image LRF LRF 7500 CR-SPLIT=NO 1 1100S MIN DUR 1100S MAX DUR 1300S EXPAND END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 5] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: JUST make sure MIN DUR=1100 AND ALL OBS FIT INTO 2 ORBITS Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 3C303.1 wfpc2 image LRF LRF 6344 CR-SPLIT=NO 3 1400S ------------------------------------------------------------------------------------------------------------------------------------ 6 3C303.1 wfpc2 image LRF LRF 6858 CR-SPLIT=NO 1 1300S ------------------------------------------------------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 6] Visit: 03 Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 7 3C277.1 wfpc2 image LRF LRF 6609 CR-SPLIT=NO 3 1100S ------------------------------------------------------------------------------------------------------------------------------------ 8 3C277.1 wfpc2 image LRF LRF 7100 CR-SPLIT=NO 1 1100S ------------------------------------------------------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 7] Visit: 04 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 ------------------------------------------------------------------------------------------------------------------------------------ 9 3C147 wfpc2 image LRF LRF 7736 CR-SPLIT=NO 3 1300S ------------------------------------------------------------------------------------------------------------------------------------ 10 3C147 wfpc2 image LRF LRF 8500 CR-SPLIT=NO 1 1200S ------------------------------------------------------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 8] Visit: 05 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 ------------------------------------------------------------------------------------------------------------------------------------ 11 4C12.50 wfpc2 image LRF LRF 5618 CR-SPLIT=NO 1 1100S MIN DUR 1100s ------------------------------------------------------------------------------------------------------------------------------------ 12 4C12.50 wfpc2 image LRF LRF 5618 CR-SPLIT=NO 1 1100S EXPAND MIN DUR 1100s MAX DUR 1300S END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ 13 4C12.50 wfpc2 image LRF LRF 5618 CR-SPLIT=NO 1 1100S ------------------------------------------------------------------------------------------------------------------------------------ 14 4C12.50 wfpc2 image LRF LRF 6100 CR-SPLIT=NO 1 1100S EXPAND MIN DUR 1100s MAX DUR 1300S END ORBIT ------------------------------------------------------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 9] Visit: 06 Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 15 3C268.3 wfpc2 image LRF LRF 6860 CR-SPLIT=NO 3 1200S ------------------------------------------------------------------------------------------------------------------------------------ 16 3C268.3 wfpc2 image LRF LRF 6860 CR-SPLIT=NO 3 1100S ------------------------------------------------------------------------------------------------------------------------------------ 17 3C268.3 wfpc2 image LRF LRF 7500 CR-SPLIT=NO 2 1200S ------------------------------------------------------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 10] Visit: 07 Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 18 3C454.1 wfpc2 image LRF LRF 4404 CR-SPLIT=NO 3 1100S ------------------------------------------------------------------------------------------------------------------------------------ 19 3C454.1 wfpc2 image LRF LRF 5200 CR-SPLIT=NO 1 1100S ------------------------------------------------------------------------------------------------------------------------------------ 5923( 9) - 11/16/95 17:33 - [ 11] Summary Form for Proposal 5923 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations wfpc2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes image ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category AGN ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements MIN DUR 1100S EXPAND MIN DUR 1100S MAX DUR 1300S END ORBIT MIN DUR 1100S MAX DUR 1300S EXPAND END ORBIT CVZ ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements LRF ------------------------------------------------------------------------------------------------------------------------------------ Target Names 3C48 3C303.1 3C277.1 3C147 4C12.50 3C268.3 3C454.1 ------------------------------------------------------------------------------------------------------------------------------------