8136( 5) - 11/03/99 07:51 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 8136 Version: 5 Check-in Date: 03-Nov-1999 07:50:38 1.Proposal Title: Powering the narrow line regions in Seyfert galaxies - are radio jets the key? ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 8 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Carole Mundell University of Maryland CoI: Prof. Andrew Wilson University of Maryland N CoI: Dr. Pierre Ferruit University of Maryland N ------------------------------------------------------------------------------------ 5. Abstract It has recently been argued that the energetic importance of Seyfert radio jets has been underestimated and that jets may provide the enough mechanical energy input to drive all the line emission in the Narrow Line Region (NLR) via shocks, reducing or eliminating the role played by nuclear photoionising radiation. However, despite the proximity of Seyferts, the poor angular resolution of radio images of their `jets' (more often seen as a string of knots rather than a jet) has prevented a direct causal relationship between the radio jet and NLR emission from being established. The relative contributions of direct photoionisation of emission line regions by the central continuum source, and strong interaction of the emission-line gas with radio plasma therefore remains controversial. For the first time, we have imaged the underlying radio jet in NGC4151, with unprecedented angular resolution (40 mas or 2.6pc) and here we propose matched resolution, spatially resolved, long s lit spectroscopy, to search for shock signatures due to hot gas along the straight, fine jet. This study will provide a powerful test of shock vs photoionisation models by utilising the full range of line diagnostics available with STIS, ranging from the FUV to the near IR, especially the key shock excited UV resonance lines, and will for the first time, directly establish the effect of a Seyfert radio jet on its surroundings. ------------------------------------------------------------------------------------ 8136( 5) - 11/03/99 07:51 - [ 2] Observations Description ------------------------ STIS observations of NGC4151 using G140L, G230LB, G430L and G750L. Target acquisition and peak-up are perfomed at start of visit and fringe-flat for G750L is included at the end (to be done during occultation if possible). Slit 52x0.1 in PA 83 +/- 0.2 degrees chosen to lie along VLBA radio jet, so ORIENT 127.8-128.2 or 307.8-308.2 are acceptable. Real Time Justification ----------------------- Calibration Justification ------------------------- Fringe flats for the G750L are included. No manual wave-cals are required (auto wave cals are sufficient). Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Paper Products: YES Media: DAT Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 8136( 5) - 11/03/99 07:51 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC4151 GALAXY, SEYFERT RA=12H 10M 32.52S +/- 0.03S, J2000 V = 995 V = 12.0+/-0.5 DEC=39D 24' 20.76" +/- 0.3", PLATE-ID=01QY Comments: AGN with bright point-like nucleus; nuclear V band magnitude quoted. Position corresponds to that listed in GSC and Hutchings et al; errors quoted are the difference between these co-ords and the radio VLBA co -ords. 8136( 5) - 11/03/99 07:51 - [ 4] Visit: 01 Visit Priority: Visit Requirements: ORIENT 127.8D TO 128.2D ORIENT 307.8D TO 308.2D 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 NGC4151 STIS/C ACQ F28X50L MIRROR ACQTYPE=POINT 1 0.2 S CD P ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC4151 STIS/C ACQ/PEA 52X0.1 MIRROR 1 0.2 S CD K ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC4151 STIS/C ACCUM 52X0.1 G430L 4300 CR-SPLIT=5 1 650 S CD ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC4151 STIS/C ACCUM 52X0.1 G750L 7751 CR-SPLIT=5 1 650 S CD ------------------------------------------------------------------------------------------------------------------------------------ 5 CCDFLAT STIS/C ACCUM 52X0.1 G750L 7751 2 DEF CD ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC4151 STIS/C ACCUM 52X0.1 G230LB 2375 CR-SPLIT=4 1 2620 S CD ------------------------------------------------------------------------------------------------------------------------------------ 8136( 5) - 11/03/99 07:51 - [ 5] Visit: 02 Visit Priority: Visit Requirements: ORIENT 127.8D TO 128.2D ORIENT 307.8D TO 308.2D 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 NGC4151 STIS/C ACQ F28X50L MIRROR ACQTYPE=POINT 1 0.2 S CD P ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC4151 STIS/C ACQ/PEA 52X0.1 MIRROR 1 0.2 S CD K ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC4151 STIS/F ACCUM 52X0.1 G140L 1425 1 37 M UV-MAM A ------------------------------------------------------------------------------------------------------------------------------------ 8136( 5) - 11/03/99 07:51 - [ 6] Summary Form for Proposal 8136 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F28X50LP 52X0.1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAK ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ACQTYPE=POINT CR-SPLIT=5 CR-SPLIT=4 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 127.8D TO 128.2D ORIENT 307.8D TO 308.2D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR G430L G750L G230LB G140L ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC4151 CCDFLAT ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 4300 7751 2375 1425 ------------------------------------------------------------------------------------------------------------------------------------