Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 5419 Report Date: 18-Jul-95:17:21 Version: ********** Check-in Date: ********** 1.Proposal Title: A SEARCH FOR VERY LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI IN NEARBY GALAXIES: CYCLE4 MEDIUM ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID QUASARS & AGN GO 1 Long Term yrs Sub Category OTHER ACTIVE NUCLEI ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Wallace W. Sargent CALTECH USA 818-356-4055 ------------------------------------------------------------------------------------ 7. Abstract Using UV (F160BW) and visual (F547M) continuum images obtained with WFPC2, we will search for spatially unresolved, UV-bright nuclei in nearby galaxies. The goals are to discover very low-luminosity AGNs, and to see whether there is a lower limit to the activity. This is a natural extension of the large spectroscopic survey we have already conducted at Palomar. Galaxies to be observed are those in which broad H- alpha emission was either NOT detected or possibly detected in our ground-based study, but whose morphology (Hubble type) and narrow emission lines appear similar to those of galaxies in which broad H-alpha WAS detected. Images of 25 nearby galaxies will be obtained during Cycle 4. In future cycles, we will propose spectroscopic observations of the most probable AGNs detected through the imaging study. In most galaxies, low-luminosity active nuclei are very difficult to discern at optical wavelengths due to the dominance of the stellar continuum. At UV wavelengths, on the other hand, contamination from the old stellar population is low, making it possible to detect a nonstellar continuum. As by-products of this study, we will publish high-resolution UV and visual surface photometry of the observed galaxies, and we will identify interesting morphological features (e.g., dust lanes, blue stars, HII regions). Moreover, we will be able to recognize compact cores that may be produced by massive central black holes. ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 11.58 par: 0 10. Num targs pri: 21 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: WF/PC ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 5419 PI: Wallace W. Sargent Proposal Title: A SEARCH FOR VERY LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI IN NEARBY GALAXIES: CYCLE4 MEDIUM ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ Wallace W. Sargent 1590 USA Alexei V. Filippenko 1500 USA Luis C. Ho 1500 USA ------------------------------------------------------------------------------------ 3. Description of proposed observations. We plan to obtain two WFPC2 (PC) images of each of 21 bright, nearby galaxies. The first exposure will utilize the F160BW (Woods) filter to measure the distribution of UV light, while the second will be done through the F547M (visual) filter for comparison. In each case the red exposure is short, but quite important. At the typical distances and absolute magnitudes of our program galaxies, expected core radii based on observed core parameter relations are typically 0.2", and many are expected to be < 0.1". Therefore, since the profiles are likely to be cuspy anyway, we need to have a method for determining which cores are probably AGNs (bright in the UV relative to the visual) --- the V-band cusps could just be star clusters. Measurements of color gradients in the nuclear regions will also help us eliminate cases in which dust rings or stellar population gradients produce unresolved (or nearly unresolved) nuclei. These data will allow us to discover galaxies having unresolved UV-bright nuclei. Photometry of the nuclei will be done, and the results will be used to determine spectroscopic exposure times in future proposals. (The exposure times strongly depend on the surface brightness of the inner few tenths of an arc second; prior to HST, this was not known for any galaxies.) We will also perform surface photometry of these images, and we will look for features such as dust lanes, HII regions, and hot stars in the circumnuclear regions. Page 3 ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. It is extremely difficult to detect a faint, point-like LLAGN in ground- based images --- at visual wavelengths, the surrounding starlight completely dominates the image. Even in the U and B bands, observable from the ground, starlight contamination within the seeing disk is too severe, and in any case the contribution of a nonstellar continuum is small. Indeed, we have obtained such images of many galaxies in our sample, but unresolved nuclei are not visible in them. Ground-based spectroscopic techniques also fail at such low luminosities; we have pushed spectroscopy to its limit in our extensive survey for weak, broad H-alpha emission in nearby galactic nuclei. Around 1600 A, on the other hand, the contribution of starlight is minimal, yet the WFPC2 on HST is fairly efficient. Emission from active nuclei much weaker than currently known can easily be discerned from the bulge background, as demonstrated in Figure 3. The PC is preferred over the FOC/96 because the latter may saturate with the high count rates expected in galactic nuclei; moreover, the PC provides a wider field of view (35" X 35" instead of a maximum of 14" X 14"), enabling us to study a larger portion of each galaxy. Most of the galaxies already observed with HST were not imaged through a filter combination that effectively blocks out the red leak. Moreover, visual or red images were generally not obtained, so it is difficult to determine whether the cuspy nucleus (if present) is simply a dense concentration of stars. Finally, many of the imaged galaxies were not good candidates for LLAGNs based on our existing survey, or were already known to be Seyferts. We estimate that the typical central UV surface brightness will be 20 mag per square arcsec (using AB magnitudes, defined by Oke and Gunn, 1983, ApJ, 266, 713). According to the WFPC2 Handbook, the integral of QT dl/l = 0.001 for the F160BW filter. Thus, the count rate per 0.046" X 0.046" pixel will be 0.0046 per second, and a 30-minute exposure will yield a S/N ratio of about 3 per pixel. Point-like UV nuclei should be even brighter in the central few pixels; they will easily be detected, and good photometry will be obtained. The F547M observation will require only 5 minutes for S/N = 25 per pixel. To evaluate the feasibility of this project, we created simulated UV images of galaxies with parameters typical of our sample. The spheroid of the simulated galaxy, which fills all of the field of view, was modeled as a de Vaucouleurs law, with a central UV surface brightness taken from the recent ASTRO measurements of several galaxies (O'Connell, 1991, private communication). The image was then convolved with the observed HST PSF, and the expected amount of noise was added. Point sources of various magnitudes were added to the nucleus of the galaxy, and at various radii from the center. Figure 3 shows an example of such a simulation. The central point source, of magnitude 20 in this case, is easily visible above the background. The other two point sources, also discernable, have UV magnitudes of 22-23 and correspond to small clusters of O-type stars at the distance of our typical galaxy (10 Mpc). ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. None. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. None. ------------------------------------------------------------------------------------ 8. Additional comments or special requests. Note that we had request to use the F218W filter Page 4 ------------------------------------------------------------------------------------ 9. Description of previous HST work. 2078, A Search for Primordial Gas: is I Zw 18 a Young Galaxy? -- D. Kunth, J. Lequeux, W. Sargent, F. Viallefond 2424, Quasar Absorption Line Survey. -- J. Bahcall, W. Sargent, et al. 2590, Deep Imaging of the Site of SN 1961V. -- A. Filippenko, et al. 3507, UV Spectroscopy and High-Resolution Imaging of NGC 4395. -- A. Filippenko, W. Sargent, L. Ho 3519, UV Imaging of Nearby Galaxies. -- D. Maoz, A. Filippenko, et al. 3810, The Stellar Population of Wolf-Rayet Galaxies. -- P. Conti, A. Filippenko, W. Sargent, L. Ho, C. Leitherer, C. Robert, W. Vacca 4302, Supernovae and their Local Environment. -- A. Filippenko, et al. 4312, Circumstellar Material around Supernovae. -- A. Filippenko, et al. 4340, Origin of Blue Featureless Continuum in Seyfert 2 Nuclei. -- A. Filippenko, L. Ho 4350, FOS Observations of LINER Galaxy Nuclei. -- G. Reichert, A. Filippenko, L. Ho, J. Shields, R. Mushotzky, K. Mason, G. Branduardi-Raymont, C. Wu. 4635, Accretion Disk Line-Profile Hypothesis in Arp 102B. -- A. Filippenko, J. Halpern, M. Eracleous, K. Chen PUBLICATIONS: "A Gravitational Lens Candidate Discovered with the Hubble Space Telescope." D. Maoz, J. N. Bahcall, D. P. Schneider, R. Doxsey, N. A. Bahcall, A. V. Filippenko, W. M. Goss, O. Lahav, and B. Yanny; Astrophysical Journal (Letters), 386, L1 (1992). "HST Observations of NGC 4395, the Least Luminous Seyfert 1 Nucleus: Evidence Against the Starburst Hypothesis for Broad-Lined Active Galactic Nuclei." A. V. Filippenko, L. C. Ho, and W. L. W. Sargent; Astrophysical Journal (Letters), 410, L75 (1993). "NGC 4395: Evidence Against the Starburst Hypothesis for Seyfert 1 Nuclei and QSOs." A. V. Filippenko, L. C. Ho, and W. L. W. Sargent; in 16th Texas Symposium/3rd Symposium on Particles, Strings, and Cosmology; ed. C. Akerlof and M. Srednicki (New York: New York Academy of Sciences), 707 (1993). "Was SN 1961V a Genuine Supernova?" G. C. Bower, A. V. Filippenko, et al. BAAS, 25, 819 (1993). "The HST Quasar Absorption Line Key Project I. First Observational Results, Including Lyman-alpha and Lyman Limit Systems." J. N. Bahcall, et al.; Astrophysical Journal, in press (1993). "The HST Quasar Absorption Line Key Project II. Data Calibration and Absorption Line Selection." D. P. Schneider et al.; Astrophys. Journal, in press (1993). "The HST Quasar Absorption Line Key Project III. First Observational Results on the Milky Way Gas." B. Savage et al.; Astrophys. Journal, in press (1993). "CCD Imaging of Hubble Space Telescope Quasar Fields." S. Kirhakos, W. L. W. Sargent, D. P. Schneider, J. N. Bahcall, B. T. Jannuzi, D. Maoz, and T. A. Small; Publ. Astron. Soc. Pacific, in press (1993). "Is There Primordial Gas in I Zw 18?" D. Kunth, J. Lequeux, W. Sargent, and F. Viallefond; Astron. Astrophys., in press (1993). ------------------------------------------------------------------------------------ 10. Resources to be supplied by investigator's institution(s). Both Caltech and U.C. Berkeley have extensive computing facilities (VMS and UNIX) in their Astronomy Departments. Image-processing workstations, graphics terminals, laser printers, large disks, and tape drives are all available. Many computer programs exist for analysis of data. Both institutions also have many extremely capable graduate students and postdoctoral fellows, a few of whom may participate in various aspects of this project. Ground-based complementary observations may readily be obtained at both Palomar and Lick Observatories. The usual secretarial and technical support is available at Caltech and Berkeley. ------------------------------------------------------------------------------------ 11. Address Information Page 5 Name: WALLACE W. SARGENT Category: PI Institution: 1590 Address: ASTRONOMY/PALOMAR OBSERVATORY MAIL CODE 105-24 CALTECH City: PASADENA State: CA Zip Code: 91125 Country: USA Telephone: 818-356-4055 Telex (or e-mail): WWS@DEIMOS.CALTECH.EDU ------------------------------------------------------------------------------------ Name: ALEXEI V. FILIPPENKO Category: CON Institution: 1500 Address: ASTRONOMY DEPARTMENT 601 CAMPBELL HALL UNIV. OF CALIFORNIA City: BERKELEY State: CA Zip Code: 94720 Country: USA Telephone: 510-642-1813 Telex (or e-mail): ALEX@BKYAST.BERKELEY.EDU ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5419 [ 6] ------------------------------------------------------------------------------------------------------------------------------------ 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 NGC1961 E,301,317,910 RA = 05H 42M 04.5S +/- 0.1S, 2000 V = 1 V = 11.8 +/- 0.5 DEC = +69D 22' 43.6" +/- +3940 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC2655 E,301,317,910 RA = 08H 55M 37.5S +/- 0.1S, 2000 V = 1 V = 11.0 +/- 0.5 DEC = +78D 13' 24.9" +/- +1390 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC3166 E,301,317,910 RA = 10H 13M 45.6S +/- 0.1S, 2000 V = 1 V = 11.5 +/- 0.5 DEC = +03D 25' 29.6" +/- +1340 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC3169 E,301,317,910 RA = 10H 14M 14.9S +/- 0.1S, 2000 V = 1 V = 11.3 +/- 0.5 DEC = +03D 28' 00.0" +/- +1240 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC3607 E,302,317,910 RA = 11H 16M 54.7S +/- 0.1S, 2000 V = +930 1 V = 11.1 +/- 0.5 DEC = +18D 03' 06.1" +/- 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC3642 E,301,317,910 RA = 11H 22M 17.9S +/- 0.1S, 2000 V = 1 V = 11.5 +/- 0.5 DEC = +59D 04' 28.4" +/- +1620 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC3718 E,301,317,910 RA = 11H 32M 34.9S +/- 0.1S, 2000 V = 1 V = 11.3 +/- 0.5 DEC = +53D 04' 05.5" +/- +1000 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5419 [ 7] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC3992 E,301,317,910 RA = 11H 57M 36.0S +/- 0.1S, 2000 V = 1 V = 10.6 +/- 0.5 DEC = +53D 22' 29.6" +/- +1050 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC4036 E,301,317,910 RA = 12H 01M 26.7S +/- 0.1S, 2000 V = 1 V = 11.6 +/- 0.5 DEC = +61D 53' 45.3" +/- +1382 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC4111 E,301,317,910 RA = 12H 07M 03.1S +/- 0.1S, 2000 V = +790 1 V = 11.8 +/- 0.5 DEC = +43D 03' 56.8" +/- 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC4192 E,301,317,910 RA = 12H 13M 48.3S +/- 0.1S, 2000 V = -140 1 V = 10.9 +/- 0.5 DEC = +14D 54' 01.6" +/- 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC4203 E,302,317,910 RA = 12H 15M 05.0S +/- 0.1S, 2000 V = +934 1 V = 11.6 +/- 0.5 DEC = +33D 11' 50.0" +/- 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 13 NGC4438 E,301,317,910 RA = 12H 27M 45.6S +/- 0.1S, 2000 V = +934 1 V = 10.9 +/- 0.5 DEC = +13D 00' 32.6" +/- 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC4569 E,301,317,910 RA = 12H 36M 49.8S +/- 0.1S, 2000 V = -260 1 V = 10.2 +/- 0.5 DEC = +13D 09' 46.5" +/- 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 5419 [ 8] ------------------------------------------------------------------------------------------------------------------------------------ 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| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC4651 E,301,317,910 RA = 12H 43M 41.9S +/- 0.1S, 2000 V = +790 1 V = 11.4 +/- 0.5 DEC = +16D 23' 36.1" +/- 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 16 NGC5005 E,301,317,910 RA = 13H 10M 56.1S +/- 0.1S, 2000 V = 1 V = 10.6 +/- 0.5 DEC = +37D 03' 30.6" +/- +1020 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 17 NGC5195 E,302,317,910 RA = 13H 29M 59.3S +/- 0.1S, 2000 V = 1 V = 10.5 +/- 0.5 DEC = +47D 15' 57.7" +/- +1020 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 18 NGC6500 E,301,317,910 RA = 17H 55M 59.7S +/- 0.1S, 2000 V = 1 V = 12.9 +/- 0.5 DEC = +18D 20' 18.3" +/- +2000 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 19 NGC6951 E,301,317,910 RA = 20H 37M 14.0S +/- 0.1S, 2000 V = 1 V = 12.2 +/- 0.5 DEC = +66D 06' 21.2" +/- +1430 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC7217 E,301,317,910 RA = 22H 07M 52.4S +/- 0.1S, 2000 V = +950 1 V = 11.1 +/- 0.5 DEC = +31D 21' 34.0" +/- 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ 21 NGC7743 E,301,317,910 RA = 23H 44M 21.1S +/- 0.1S, 2000 V = 1 V = 12.1 +/- 0.5 DEC = +09D 56' 03.2" +/- +1800 2 B-V = 0.8 +/- 0.3 1.0" Comments: MAGNITUDES AND COLORS REFER TO ENTIRE GALAXY, NOT JUST THE NUCLEUS WHICH WILL BE IMAGED. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5419 [ 9] ------------------------------------------------------------------------------------------------------------------------------------ 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 NGC1961 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 31 CYCLE 4 TOLERANCE=0.0 2 GROUP 1-2 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC1961 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 32 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC2655 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1600S 3 1 33 CYCLE 4 TOLERANCE=0.0 2 GROUP 3-4 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 4 NGC2655 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 34 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 5 NGC3166 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 35 CYCLE 4 TOLERANCE=0.0 2 GROUP 5-6 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 6 NGC3166 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 36 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 7 NGC3169 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1600S 3 1 37 CYCLE 4 TOLERANCE=0.0 2 GROUP 7-8 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5419 [ 10] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 8 NGC3169 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 260S 25 1 38 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 9 NGC3607 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1600S 3 1 39 CYCLE 4 TOLERANCE=0.0 2 GROUP 9-10 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 10 NGC3607 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 260S 25 1 40 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC3642 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 1 CYCLE 4 TOLERANCE=0.0 2 GROUP 11-12 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC3642 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 2 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 13 NGC3718 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 3 CYCLE 4 TOLERANCE=0.0 2 GROUP 13-14 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC3718 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 4 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5419 [ 11] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC3992 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1400S 3 1 29 CYCLE 4 TOLERANCE=0.0 2 GROUP 15-16 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 16 NGC3992 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 230S 25 1 30 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 17 NGC4036 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 27 CYCLE 4 TOLERANCE=0.0 2 GROUP 17-18 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 18 NGC4036 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 28 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 19 NGC4111 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 25 CYCLE 4 TOLERANCE=0.0 2 GROUP 19-20 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 20 NGC4111 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 26 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 21 NGC4192 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1400S 3 1 21 CYCLE 4 TOLERANCE=0.0 2 GROUP 21-22 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5419 [ 12] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 22 NGC4192 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 230S 25 1 22 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 23 NGC4203 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 41 CYCLE 4 TOLERANCE=0.0 2 GROUP 23-24 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 24 NGC4203 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 42 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 25 NGC4438 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1600S 3 1 17 CYCLE 4 TOLERANCE=0.0 2 GROUP 25-26 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 26 NGC4438 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 260S 25 1 18 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 27 NGC4569 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1400S 3 1 15 CYCLE 4 TOLERANCE=0.0 2 GROUP 27-28 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 28 NGC4569 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 230S 25 1 16 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5419 [ 13] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 29 NGC4651 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 13 CYCLE 4 TOLERANCE=0.0 2 GROUP 29-30 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 30 NGC4651 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 14 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 31 NGC5005 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1400S 3 1 7 CYCLE 4 TOLERANCE=0.0 2 GROUP 31-32 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 32 NGC5005 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 230S 25 1 8 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 33 NGC5195 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1400S 3 1 11 CYCLE 4 TOLERANCE=0.0 2 GROUP 33-34 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 34 NGC5195 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 230S 25 1 12 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 35 NGC6500 WFPC2 IMAGE PC1 F218W 1523 CR- 1 2200S 3 1 5 CYCLE 4 TOLERANCE=0.0 2 GROUP 35-36 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 5419 [ 14] ------------------------------------------------------------------------------------------------------------------------------------ 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 ------------------------------------------------------------------------------------------------------------------------------------ 36 NGC6500 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 350S 25 1 6 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 37 NGC6951 WFPC2 IMAGE PC1 F218W 1523 CR- 1 2000S 3 1 9 CYCLE 4 TOLERANCE=0.0 2 GROUP 37-38 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 38 NGC6951 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 10 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 39 NGC7217 WFPC2 IMAGE PC1 F218W 1523 CR- 1 1800S 3 1 23 CYCLE 4 TOLERANCE=0.0 2 GROUP 39-40 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 40 NGC7217 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 24 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 41 NGC7743 WFPC2 IMAGE PC1 F218W 1523 CR- 1 2000S 3 1 19 CYCLE 4 TOLERANCE=0.0 2 GROUP 41-42 NO GAP Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ 42 NGC7743 WFPC2 IMAGE PC1 F547M 5479 CR-SPLIT=NO 1 300S 25 1 20 CYCLE 4 2 Comments: IF THERE IS EXTRA TIME BEFORE EARTH OCCULTATION NEAR END OF EXPOSURE, CAN INCREASE EXPOSURE TIME TO INCREASE S/N RATIO. ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 5419 [ 15] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-TOLERANCE=0.0 CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GO ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 11.58 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category QUASARS & AGN ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category OTHER ACTIVE NUCLEI ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 4; GROUP 1-2 NO GAP GROUP 3-4 NO GAP GROUP 5-6 NO GAP GROUP 7-8 NO GAP GROUP 9-10 NO GAP GROUP 11-12 NO GAP GROUP 13-14 NO GAP GROUP 15-16 NO GAP GROUP 17-18 NO GAP GROUP 19-20 NO GAP GROUP 21-22 NO GAP GROUP 23-24 NO GAP GROUP 25-26 NO GAP GROUP 27-28 NO GAP GROUP 29-30 NO GAP GROUP 31-32 NO GAP GROUP 33-34 NO GAP GROUP 35-36 NO GAP GROUP 37-38 NO GAP GROUP 39-40 NO GAP GROUP 41-42 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F218W F547M ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC1961 NGC2655 NGC3166 NGC3169 NGC3607 NGC3642 NGC3718 NGC3992 NGC4036 NGC4111 NGC4192 NGC4203 NGC4438 NGC4569 NGC4651 NGC5005 NGC5195 NGC6500 NGC6951 NGC7217 NGC7743 ------------------------------------------------------------------------------------------------------------------------------------