Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 1222c Report Date: 09-May-96:16:20 Version: ********** Check-in Date: ********** 1.Proposal Title: A FIRST STUDY OF ACTIVE NUCLEI WITH ST - THE STELLAR AND GASEOUS ENVIRONMENT OF THE NGC 4151 NUCLEUS ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID QSO, AGN, SEYFERTS GTO/FOC Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Alec Boksenberg ROYAL GREENWICH OBSERVATORY UNITED KIN (0223) 374000 PROFESSOR ------------------------------------------------------------------------------------ 7. Abstract NGC 4151 is the Seyfert galaxy with the brightest nucleus in apparent magnitude and one of the nearest and most active Seyfert galaxies. We propose to obtain the distribution and velocity field of the gas near the center in an attempt to answer the following questions: Is the gas distributed in a disk, a cone, along the radio jet? Is the photoionizing isotropic? What are the gas motions, the origin of the gas and the rate of the mass loss? We propose: - to map the ionized gas in the [OIII] lambda 5007 line to tie in the FOC observations with those made from the ground, and in the CIV lambda 1500 line for even higher angular resolution and because it is a permitted line and emitted by highly ionized gas; - to take long slit spectra in the first and third orders which will give the line width, the velocity field and line intensity ratios as a function of distance from center. The spectra will be taken along and perpendicular to the radio jet. (P.A.= 80 degrees +/- 10 degrees; P.A.= 170 degrees +/- 10 degrees. ------------------------------------------------------------------------------------ 8. Scientific Key Words: SEYFERT GALAXY, KINEMATICS, SPECTROSCOPY, IMAGING, JET, PROFILES ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 4.00 par: 0 10. Num targs pri: 3 par: 0 ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 1222c PI: Alec Boksenberg Proposal Title: A FIRST STUDY OF ACTIVE NUCLEI WITH ST - THE STELLAR AND GASEOUS ENVIRONMENT OF THE NGC 4151 NUCLEUS ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ L. Piro ROME, UNIVERSITY OF ITALY X J. Clavel MEUDON OBSERVATORY FRANCE X A. Altamore ROME, UNIVERSITY OF ITALY X G. C. Perola ROME, UNIVERSITY OF ITALY X A. Elvius STOCKHOLM OBSERVATORY SWEDEN X M. Pettini ROYAL GREENWICH OBSERVATORY UNITED KING X M. Tarenghi EUROPEAN SOUTHERN OBSERVATORY GERMANY, WE X G. E. Bromage RUTHERFORD APPLETON LABORATORY UNITED KING X Alec Boksenberg ROYAL GREENWICH OBSERVATORY UNITED KING X M. A. J. Snijders X Marie-Helene Demoulin-Ulrich EUROPEAN SOUTHERN OBSERVATORY GERMANY, WE X ------------------------------------------------------------------------------------ 3. Description of proposed observations. a) Mapping of the gas in the immediate vicinity of the nucleus in the CIV LAMBDA 1550 and [0III] LAMBDA 5007 lines. b) Velocity field, line width and line ratios from long slit spectra along the radio jet (P.A.=80D+/-10D) and perpendicular to the radio jet (P.A.=170D+/-10D) at two offsets from the nucleus c) Last but not least, the above spectra will give very high S/N spectra of the nucleus with 1 to 2 A resolution for study of emission line profiles, absorption lines and continuum. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. The ionized gas distribution and velocity field have already been obtained from observations in the [0III] LAMBDA 5007 line with 1 arc sec resolution, practically the best which can be achieved from the ground. It is very important to obtain observations closer to the nucleus because the closer the gas is to the nucleus the more it reflects of the conditions of acceleration and possibly ejection. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. Dark time: the first two exposures require a solar zenith angle larger than 90D for suppression of residual airglow 0ILAMBDA1304 emission. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. The Institutions to which we are affiliated are well outfitted in hardware (VAX computers) and software for data reduction and analysis. The data will be reduced and analysed simultaneously in several institutions. The results will then be compared. The astrophysical interpretation will be done as a group. ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Our institutions will fully support us and have the software and hardware appropriate for the reduction and analysis of ST data. ------------------------------------------------------------------------------------ 13. The[0III]5000A and CIV 1550A doublets in NGC4151 will be observed using the long slit spectrograph and the f/96 imaging facilities of the FOC to study the line profiles with high spatial resolution. ------------------------------------------------------------------------------------ 11. Address Information Page 3 Name: ALEC BOKSENBERG Category: PI Institution: ROYAL GREENWICH OBSERVATORY Address: MADINGLEY ROAD CB3 0EZ City: CAMBRIDGE State: Zip Code: Country: UNITED KINGDOM Telephone: (44) 223 374000 Telex (or e-mail): 817235 ------------------------------------------------------------------------------------ Name: MARIE-HELENE DEMOULIN-ULRICH Category: CON Institution: EUROPEAN SOUTHERN OBSERVATORY Address: KARL-SCHWARZSCHILD-STRASSE 2 D-8046 City: GARCHING BEI MUNCHEN State: Zip Code: Country: GERMANY, WEST Telephone: (89) 32006-232 Telex (or e-mail): 52828222 ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 1222c [ 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 NGC4151-NUC SEYFERT 1.5 GALAXY RA = 12H 08M 01.07S +/- 1S, 1950 V=960 EXT 1 V=11.9 DEC = +39D 41' 01.98" +/- 1" 2 F-LINE(1550)=4 +/- 1E-13, 3 F-LINE(1550)=1.1 +/- 0.3E-12, 4 F-LINE(5007)=10 +/- 3E-13, Comments: 2 REFERS TO THE NARROW EXTENDED COMPONENT; 3 REFERS TO THE VARIABLE POINT SOURCE AT PEAK STRENGTH; TRUE POSITION OF NUCLEUS TBD FROM IMAGE GASP POSITION USED ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC4151-P3 0.3" OFFSET TO W ALONG R=0.3" +/- 0.1", 1950 EXT 1 F-LINE(1550)=1.1 +/- 0.3E-12, RADIO JET PA=260D +/- 10D, 2 SURF-LINE(5007)=2.4 +/- 1E-13, FROM 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC4151-P5 O.5" OFFSET TO W ALONG R=0.5" +/- 0.1", 1950 EXT 1 SURF-LINE(5007)=2.4 +/- 1E-13, RADIO JET PA=260D +/- 10D, FROM 1 Comments: REFERENCES FOR FLUX DATA: [OIII], ANTONUCCI & COHEN, AP.J., 271, 564, 1983. CIV, ULRICH ET AL., M.N.R.A.S., 206, 221, 1984. [OIII] EXTENDED, PELAT & ALLOIN, ASTRON & ASTROPHYS 105, 335, 1982. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1222c [ 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 ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC4151-NUC FOC/96 IMAGE 256X256 F152M 1500 1 1000S 2 1 DARK TIME / 1-2 3 CYCLE 2 / 1-15 COND IF TAC OK / 1 -15 GUID TOL 0.020" / 1-15 ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC4151-NUC FOC/96 IMAGE 256X256 F152M 1500 1 500S 2 2 3 ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC4151-NUC FOC/96 IMAGE 256X256 F152M 1500 1 800S 2 3 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC4151-NUC FOC/96 IMAGE 256X256 F501N, 5010 1 700S 4 2 F2ND ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC4151-NUC FOC/96 IMAGE 256X256 F501N 5010 1 700S 4 2 ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC4151-NUC FOC/96 IMAGE 256X256 F501N, 5010 1 500S 4 3 F2ND ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC4151-NUC FOC/96 IMAGE 256X256 F501N 5010 1 500S 4 3 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC4151-NUC FOC/48 SPEC 256X102 G450M 3600- PIXEL=25X25 1 1400S 4 1 ORIENT 285D +/- 5D 4-SLIT 5300 Comments: P.A. OF SLIT 45D+/-5D; ORIENT 105D +/- 5D IS EQUALLY GOOD. ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC4151-NUC FOC/48 SPEC 256X102 G450M 3600- PIXEL=25X25 1 1000S 4 1 ORIENT 320D +/- 4-SLIT 5300 10D SAME ORIENT FOR 11 AS 9 Comments: P.A. OF SLIT 80D+/-10D; ORIENT 140D +/- 10D IS EQUALLY GOOD. ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4151-NUC FOC/48 SPEC 256X102 G450M 3600- PIXEL=25X25 1 800S 4 1 4-SLIT 5300 ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC4151-NUC FOC/48 SPEC 256X102 G150M 1200- PIXEL=25X25 1 1300S 2 1 4-SLIT 1767 3 ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC4151-P3 FOC/48 SPEC 256X102 G450M 3600- PIXEL=25X25 1 500S 2 1 ORIENT 50D +/- 10D 4-SLIT 5300 Comments: P.A. OF SLIT 170D+/-10D OFFSET 0.3" FROM NUCLEUS; ORIENT 230D +/- 10D IS EQUALLY GOOD. ------------------------------------------------------------------------------------------------------------------------------------ 13 NGC4151-P5 FOC/48 SPEC 256X102 G450M 3600- PIXEL=25X25 1 500S 1 2 4-SLIT 5300 Comments: P.A. OF SLIT 170D+/-10D OFFSET 0.5" FROM NUCLEUS; ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 1222c [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC4151-P3 FOC/48 SPEC 256X102 G150M 1200- PIXEL=25X25 1 500S 1 2 4-SLIT 1767 Comments: FILTER F130LP MIGHT HAVE TO BE USED TO SUPPRESS GEOCORONAL LY ALPHA EMISSION FOR EXP 11,14. DATA DOESN'T MAKE IT CLEAR IF F150W WILL. P.A. OF SLIT 170D+/ -10D OFFSET 0.3" FROM NUCLEUS; ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC4151-NUC FOC/48 ACQ 128X128 F140W 1500 1 120S 2 1 ONBOARD ACQ FOR 8, -ASLIT 3 9,11,12 ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 1222c [ 7] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations FOC/96 FOC/48 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE SPEC ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters PIXEL=25X25 ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GTO/FOC ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 4.00 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QSO, AGN, SEYFERTS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements DARK TIME / 1-2; CYCLE 2 / 1-15; COND IF TAC OK / 1-15; GUID TOL 0.020" / 1-15; ORIENT 285D +/- 5D; ORIENT 320D +/- 10D; SAME ORIENT FOR 11 AS 9; ORIENT 50D +/- 10D; ONBOARD ACQ FOR 8,9,11,12; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F152M F501N, F2ND F501N G450M G150M F140W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC4151-NUC NGC4151-P3 NGC4151-P5 ------------------------------------------------------------------------------------------------------------------------------------