! Proposal 6333, submission 1 ! PI: Jack Baldwin ! Received Tue Oct 3 05:37:32 EDT 1995 ! From: pi36@stsci.edu ! RPS2 template - 6333.prop ! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! ! Refer to the HST Phase II Proposal Instructions to fill this out ! ! Anything after a "!" is ignored, and may be deleted ! ! All keywords with multiple entries are comma delimited except the ! Visit_Requirements and Special_Requirements keywords which can be ! delimited with carriage returns or semi-colons, but not commas ! ! For help call your Program Coordinator: Alice Berman ! Phone: 410/338-4462, E-mail: aberman@stsci.edu ! Proposal_Information Title: PHYSICAL CONDITIONS IN THE NARROW-LINED REGION Proposal_Category: GO/CAR Scientific_Category: AGN Cycle: 4 Investigators ! Please put a "Y" next to the appropriate "Contact". PI_name: Jack Baldwin PI_Institution: National Optical Astronomy Observatories CoI_Name: Gary Ferland CoI_Institution: Ohio State University Contact: CoI_Name: Beverley Wills CoI_Institution: University of Texas Contact: CoI_Name: Derek Wills CoI_Institution: University of Texas Contact: CoI_Name: H. Netzer CoI_Institution: Tel Aviv University Contact: Abstract: We are making a comprehensive study of the emission-line gas in the narrow-lined region (NLR) of active galactic nuclei (AGN), concentrating on Seyfert 2 galaxies (initially NGC3393) to avoid confusion with the spectrum of the broad line region (BLR). We are using a wide variety of the HST instruments, to ensure a comprehensive and high-quality data set. These data should immediately allow us to address several important, inter-related questions about AGN: a. What is the velocity field in the innermost part of the NLR? b. Where does the reddening occur in AGN? c. What is the chemical composition of the gas associated with the AGN? d. How do the Seyfert 1 and Seyfert 2 continuum sources differ? e. Do most Seyfert 2 galaxies contain "hidden" BLRs? We have used the FOS and PC to study extended structure in a few strong lines This has given us information on the structure, ionisation, and peculiar motions in the core of the galaxy. However, the nuclear morphology is more complex than we expected. We therefore intend to take an image in the UV, using WFPC2 to observe nucleus and offset star. From this we can calculate an accurate offset to obtain FOS spectra of whatever structure we detect. Questions ! Please update this section Observing_Description: Our goal is to make a comprehensive study of the Narrow Lined Region (NLR) of the seyfert galaxy NGC3393. Specifically, we were awarded HST time to try to answer the questions: a. What is the velocity field in the innermost part of the NLR? b. Where does the reddening occur in AGN? c. What is the chemical composition of the gas associated with the AGN? d. How do the Seyfert 1 and Seyfert 2 continuum sources differ? e. Do most Seyfert 2 galaxies contain "hidden" BLRs? Following our reassesment to take account of the spherical aberration problem, we had planned to use WFC, PC, FOS, and GHRS. The GHRS observations were requested on the expectation that most of the NLR emission would come from a nearly unresolved source coincident with the continuum nucleus, and that the best way to differentiate between general inflow or outflow in the NLR therefore would be to use high spectral resolution (e.g. GHRS) to look for asymmetries in the Ly-alpha emission profile. However, we have obtained a series of short early acquisition exposures with WFC and PC. These very clearly show that the NLR emission comes from two regions which straddle the nucleus. There is no NLR emission from the nucleus itself. We therefore wish to abandon the GHRS observations, since they won't tell us anything, and instead use that spacecraft time to (1) take WFPC2 exposures (in order to study this newly-discovered morphology at higher signal:noise), and (2) take FOS spectra of the brightest emission-line knot and also of the nuclear continuum source (since what we had previously thought was one target is now two targets). All the above has now been completed apart from FOS spectra of the nucleus. Although no continuum was detected we believe that line emission is still likely. Real_Time_Justification: Calibration_Justification: Additional_Comments: Since the nucleus is not bright, we propose the following procedure: 1. FOS/BL (ACQ/BINARY) acquisition of the offset star. 2. Offset and FOS/BL (ACCUM) spectra (G160L) of the knot. Fixed_Targets Target_Number: 1 Target_Name: STAR-OFFSET Alternate_Names: Description: STAR, F3-F9 Position: RA= 10H 48M 22.1045S +/- 0.001S, DEC= -25D 09' 16.110" +/- 0.001", PLATE-ID=00GU Equinox: J2000 RV_or_Z: RA_PM: 0 Dec_PM: 0 Epoch: Annual_Parallax: 0 Flux: V = 15.5 Comments: FOS/BL ACQ/BIN with this object has been successful before (see proposal 3982) Target_Number: 2 Target_Name: NGC3393-CENTRED Alternate_Names: NGC3393 Description: GALAXY,SPIRAL,SEYFERT Position: RA= 10H 48M 23.5069S +/- 0.01S, ! This is taken from xy2rd on DEC= -25D 09' 43.382" +/- 0.1", ! w1db0407t.c0h[2] 300,231 PLATE-ID=00GU ! According to header Equinox: J2000 RV_or_Z: Z=0.013 RA_PM: 0 Dec_PM: 0 Epoch: Annual_Parallax: 0 Flux: F(5500.0) = 17.0 +/- 4.0 E-17, ! From earlier proposal F(2300.0) = 3.80 +/- 0.8 E-15, F-LINE(4959.0) = 4.46 +/- 0.9 E-14, W-LINE(4959.0) = 7.1, F-LINE(6562.0) = 3.45 +/- 0.7 E-14, W-LINE(6562.0) = 9.4, F-LINE(3727.0) = 26.5 +/- 5.0 E-15, W-LINE(3727.0) = 5.3 Comments: Inner spiral structure extending +/- 7 arcsec from centre ! This is a template for a single visit containing a single exposure ! Repeat exposure and visit blocks as needed Visits ! Section 6 Visit_Number: 1 Visit_Requirements: ! Section 7.1 On_Hold_Comments: Visit_Comments: Exposure_Number: 1 Target_Name: STAR-OFFSET Config: FOS/BL Opmode: ACQ/BINARY Aperture: 4.3 Sp_Element: MIRROR Wavelength: Optional_Parameters: Number_of_Iterations: 1 Time_Per_Exposure: 33S Special_Requirements: ONBOARD ACQ FOR 2 Exposure_Number: 2 Target_Name: STAR-OFFSET Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.25-PAIR-A Sp_Element: MIRROR Wavelength: Optional_Parameters: SEARCH-SIZE-X=3, SEARCH-SIZE-Y=3, SCAN-STEP-X=0.172, SCAN-STEP-Y=0.172 Number_of_Iterations: 1 Time_Per_Exposure: 4S Special_Requirements: ONBOARD ACQ FOR 3 Exposure_Number: 3 Target_Name: NGC3393-CENTRED Config: FOS/BL Opmode: ACCUM Aperture: 0.5-PAIR-A Sp_Element: G160L Wavelength: 1600 Optional_Parameters: STEP-PATT=SINGLE Number_of_Iterations: 1 Time_Per_Exposure: 8190S Special_Requirements: ! Exposure_Number: ! Section 6.5 ! Target_Name: ! Config: ! Opmode: ! Aperture: ! Sp_Element: ! Wavelength: ! Optional_Parameters: !Number_of_Iterations: ! Time_Per_Exposure: !Special_Requirements: ! Section 7.2 ! Uncomment or copy exposure level special requirements needed ! INTeractive ACQuisition FOR ! ONBOARD ACQuisition FOR ! POSition TARGet , ! SAME POSition AS ! DO FOR TARGets ! FGS only ! PARallel WITH ! GROUP-FGS WITHIN