Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5730 Report Date: 18-Jul-95:17:54 Version: ********** Check-in Date: ********** 1.Proposal Title: PHYSICAL CONDITIONS IN THE NARROW-LINED REGION ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID QUASARS & AGN GO/CAR 1 Long Term yrs 3982 Sub Category SEYFERTS ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Prof. Jack A. Baldwin CERRO TOLOLO INTER-AMERICAN USA 011-56-51-2254 ASTRONOMER ------------------------------------------------------------------------------------ 7. 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. ------------------------------------------------------------------------------------ 8. Scientific Key Words: ACTIVE GALACTIC NUCLEUS: AGN, SEYFERT GALAXY ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 11.60 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: HRS FOS FOC WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5730 PI: Prof. Jack A. Baldwin Proposal Title: PHYSICAL CONDITIONS IN THE NARROW-LINED REGION ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Dr. Gary J. Ferland OHIO STATE UNIVERSITY USA Prof. Beverley J. Wills TEXAS, UNIVERSITY OF USA Prof. Derek Wills TEXAS, UNIVERSITY OF USA Prof. H. Netzer TEL AVIV UNIVERSITY ISRAEL P.I. Jack A. Baldwin CTIO USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. 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 now 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). This revised observing plan will fit into exactly the same number of spacecraft hours as our previous (approved) observing plan, and will answer the exact same scientific questions that we were awarded HST time to answer. The change is needed in order to take into account what has been learned from the early acquisition exposures. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. As explained above (question 3, section 2) we now have to deal with a a new morphology for this object. We need to obtain spectra from the main nuclear UV source, but are unsure of the exact positions. We therefore propose the following procedure: 1. An EARLY ACQUISITION IMAGE using the WFPC2 positioned to include both both the galaxy and the offset star (required for accurate pointing). 2. Once this image has been studied we will supply accurate coordinates (as rapidly as possible) for the next observations (below). 3. FOS/BL (ACQ/BINARY and ACQ/PEAK) acquisition of the offset star. 4. Offset and FOS/BL (ACCUM) spectra (G160L) of the knot. 5. FOS/BL (ACQ) confiramtion of the target. Steps 3,4 and 5 will be submitted separately from this proposal. ------------------------------------------------------------------------------------ 11. Address Information Page 3 Name: JACK BALDWIN Category: PI Institution: NATIONAL OPTICAL ASTRONOMY OBSERV Address: CHILE OFFICE P.O. BOX 26732 City: TUCSON State: AZ Zip Code: 85726 Country: USA Telephone: 011-56-51-225415 Telex (or e-mail): 620-301 AURA CT ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5730 [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC3393-AND- E,301,312, RA=10H48M23.25S+/-0.10", 2000 Z=.0124 1 F(5500) = 1.7 +/- 0.4 E-16 STAR A,134 DEC=-25D09'37.3"+/-1.0" 2 F(2300) = 3.8 +/- 0.8 E-15 3 F-LINE(4959) = 4.46 +/- 0.9 E-14 4 W-LINE(4959) = 7.1 5 F-LINE(6562) = 3.45 +/- 0.7 E-14 6 W-LINE(6562) = 9.4 7 F-LINE(3727) = 2.65 +/- 0.5 E-14 8 W-LINE(3727) = 5.3 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5730 [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC3393-AND WFPC2 IMAGE WF3-FIX F218W 1800- 1 280S 20 2 1 CYCLE 4 -STAR 2517 ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC3393-AND WFPC2 IMAGE WF3-FIX F218W 1800- 1 280S 20 2 1 POS TARG +1.0, -STAR 2517 +1.0 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC3393-AND WFPC2 IMAGE WF3-FIX F218W 1800- 1 280S 20 2 1 POS TARG -1.0, - -STAR 2517 1.0 CYCLE 4 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5730 [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO/CAR ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 11.60 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QUASARS & AGN ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category SEYFERTS ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4 POS TARG +1.0, +1.0 ; POS TARG -1.0, -1.0 ; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F218W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC3393-AND-STAR ------------------------------------------------------------------------------------------------------------------------------------