6107( 3) - 12/08/95 15:47 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6107 Version: 3 Check-in Date: ********** 1.Proposal Title: Dynamics and Ages of Nuclear Stellar Disks in Virgo E/S0 Galaxies ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Galaxies & Clusters GO 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Walter Jaffe Leiden Observatory, The Netherlands CoI: Holland Ford John Hopkins University, USA N CoI: Robert O'Connell University of Virginia, USA N CoI: Frank van den Bosch Leiden Observatory, The Netherlands Y CoI: Laura Ferrarese Johns Hopkins University, USA N ------------------------------------------------------------------------------------ 6. Abstract In our previous HST WFPC1 photometric study of a complete sample of ellpitical galaxies in the Virgo cluster, we discovered that the nuclei of ellipticals fainter than M_B = - 19.5 contain small, thin, bright stellar disks with radii less than 100 pc and heights less than 10 pc. Here we propose new observations of two of these disky ellipticals (NGC 4342, and NGC 4570), with the object of estimating the galaxy central masses, and measuring the age of the disks. With the FOS G570H spectroscopy we will measure the kinematics and line strengths of the disks at 20 pc resolution. With the WFPC2 we will take images at three wavelengths (U, V, I) to investigate population differences between the disks and the host galaxies. The rotation curves of the dynamically cold disks will yield accurate, unambiguous estimates (or limits) of the central masses, allowing us to determine if average cluster ellipticals host massive black holes. The population analysis and kinematics will help determine whether the fainter galaxies are the basic ``bricks" from which more luminous galaxies are formed, or are themselves composite systems. ------------------------------------------------------------------------------------ 6107( 3) - 12/08/95 15:47 - [ 2] Observations Description ------------------------ MULTI COLOR PHOTOMETRY WITH THE WFPC2: We will take three broad band images of both NGC 4342 and NGC 4570, using the PC1 camera with the F336W, F555W and F814W filters. These correspond to the U, V, and I colors of the Johnson Cousins system. From our HST (WFPC1) observations with the F555W filter we know the surface brightness (in the V-band) of these galaxies to high accuracy, and found the nuclei to be very bright due to the contribution of the nuclear disks (mu_V = 13.4, and 13.82 magn. arcsec^-2 in the centers of NGC 4342, and NGC 4570 resp.) We are repeating the F555W exposures here because the older WFPC1 observations would have to be deconvolved to compare them to the new WFPC2 U and I band images, leading to an unacceptable loss of accuracy. FOS SPECTROSCOPY OF THE NUCLEAR DISKS: We wil take spectra of the central regions of NGC 4342. Similar spectroscopy will be performed for NGC 4570 in a cycle 4 carryover proposal from cycle 1. We will use the G570H grating on the FOS red arm, covering a wavelength region that includes the Mg-b triplet near 5182 angstrom. We will use the 0.3'' aperture to obtain 7 spectra of NGC 4342; 5 along the major axis (offset = -0.5'', -0.25', 0.0'', +0.25'', and +0.5'') and two offset +/- 0.25'' along the minor axis. EXPOSURE TIMES FOR THE WFPC2 IMAGES: Using the known magnitudes, and aiming at a signal-to-noise of 100 at the center (this gives S/N approx. 30 at 1'' along the major axis), the exposure times can be calculated using formula 6.1 in the WFPC2 Instrument Handbook. In the V and I bands the necessary exposure times are roughly 200 sec. The F336W exposures are approximately 100 times longer than for the other two filters because of a combined effect of lower efficiency of the instrument and the fact that ellipticals are approximately 3 magnitudes fainter in U than in V. This would require extreme integration times, so we will settle for a S/N of 50 in the center of the U-band images. At 1'' along the major axis the signal-to-noise ratio is then approx. 15. The central S/N of 100 is chosen since we plan to do accurate surface photometry. With all exposures being CR split, none of the exposures will encounter saturation. We do not know before hand whether the estimate of the U-V color of approx. 3 magn is correct. This value corresponds to K0 Giants, which normally make up the major light contribution in elliptical. If, however, the stellar disk contains young stars the U-V color can be orders of magnitude lower. In that case the total exposure will be saturated. Therefore, the long U integrations are split in a couple of subexposures of which at least two are relatively short, in case the nuclear disk is young. THE TARGET ACQUISITION WITH THE FOS: Since the nucleus of NGC 4342 is bright (SURF(V) = 13.4) and stronly peaked (almost point-source like) we can easily do a ACQ/PEAK on the nucleus of NGC 4342 itself. The aperture to be used for our observations is the 0.3. The standard acquisition procedure is to use four ACQ/PEAK stages, starting with a 1x3 dwell pattern of the 4.3 aperture, followed by dwells using the 1.0, 0.3 and 0.3 apertures, respectively. Since the first twelf minutes of the first FOS orbit will be used to acquire a guide star, only the first two stages will fit in the first orbit of the visit. Only the third stage will fit in the second orbit, and the fourth and final stage will take up most of the third orbit. This is then an extremely inefficient procedure that leaves much unused target visibility at the end of the first and second orbit. We have therefore devised an alternative scheme based on five stages that can be executed entirely in only two orbits and yields the same pointing accuracy (0.037'') as the default four-stage peak-up. It uses a 2x7 dwell of the 4.3 aperture, a 7x2 dwell of the 1.0 aperture, a 3x3 dwell of the 0.5 aperture, a 3x3 dwell of the 0.3 aperture, and finally, a 5x5 dwell of the 0.3 aperture. For each stage the parameters SCAN-STEP-X and SCAN- STEP-Y are chosen such that apertures at different dwell positions overlap slightly, and in addition cover entirely the aperture chosen in the previous stage. The first three stages fill the first orbit of the visit, the final two stages fill the second orbit of the visit. The exposure times used are clearly longer than required according to Table 2.1.6 in the FOS instrument handbook, but since this is an extended source instead of a point source, as assumed for the values in the table, we simply follow the save approach. Furthermore, the exposure times are negligible compared to the individual overhead times. EXPOSURE TIMES FOR THE FOS SPECTRA: Since our goal is getting an understanding of the dynamics of the nuclear, stellar disks embedded in ellipticals, we are not only interested in deriving the rotation velocity (ie. the first order moment of the line profiles), but also interested in deriving velocity dispersion and if possible even higher order moments, that might allow us to attempt bulge/disk decomposition of the line profiles. We therefore aim for a S/N per diode of 60 at the center (SURF(V) = 13.4), S/N = 60 at +/- 0.25'' along the major axis (SURF(V) = 14.15), S/N = 35 at +/- 0.5'' along the major axis (SURF(V) = 14.97), and SN = 30 at +/-0.25'' along the minor axis (SURF(V) = 15.1). The S/N decreases outside for two reasons: Since the surface brightness (accurately known from WFPC cycle 1 data) stronly decreases outside, the outer points would require too long integrations, and secondly, the most interesting points, when studying the rotation curve to look for evidence of say a massive black hole, are the inner points. We therefore feel that this strategy is appropriate for our scientifc aims. From the S/N ratios mentioned above the integration times are calculated using formula 1 in Table 1.2.1 in the FOS instrument handbook. The wavelength taken in these calculations is that of the redshifted Mg-b triplet. THE WAVELENGHT CALIBRATION: After each FOS orbit we will take a wavelength calibration frame. The main cause for shifts in wavelenght along the diodes is changing the wheel with gratings. This will not happen during our FOS visit. However, there is another source of changes, namely the Earth magnetic field which acts on the electron beam in both the spatial and the dispersion direction, causing errors up to approximately 15 to 20 km per sec. Since we want high accuracy in the rotation velocities to be derived, we should therefore take these calibration frames in order to keep track of possible shifts in between two exposures. They can be taken during occulatation so that no valuable exposure time is lost. Real Time Justification ----------------------- Calibration Justification ------------------------- We will obtain wavelnght calibration spectra at the end of each orbit of the FOS visit. As explained above this is essential for an accurate determination of velocities. Since expected velocities for different models often only mildly vary, high accuracy is of vital importance. These calibration exposures do not waste any visibility time, since the wavelength calibration exposures can be done during occultation. Additional Comments ------------------- ABSOLUTELY NO CHANGES OR MODIFICATIONS, NOT EVEN MINOR ONES, SHOULD BE MADE TO THIS PROGRAM WITHOUT CONSULTING THE PI OR THE CONTACT FIRST. ------------------------------------------------------------------------------------ 6107( 3) - 12/08/95 15:47 - [ 3] Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS __Diagnosti Email: , ------------------------------------------------------------------------------------ 6107( 3) - 12/08/95 15:47 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC4570 GALAXY, ELLIPTICAL, RA = 12H 36M 53.340S +/- 0.003S, J2000.0 V = V = 10.75 +/- 0.06 NUCLEUS DEC = +7D 14' 46.18" +/- 0.05" +1730 B-V = 0.95 +/- 0.06 SURF(V) = 13.82 +/- 0.02 Comments: The WFPC2 images of NGC 4570 Fluxes as follows: V is total V magn SURF(V) = central surface brightness 21 NGC4342 GALAXY, ELLIPTICAL, RA = 12H 23M 39.003S +/- 0.003S, J2000.0 V = +714 V = 12.56 +/- 0.1 NUCLEUS DEC = +7D 3' 13.52" +/- 0.05" B-V = 0.98 +/- 0.07 SURF(V) = 13.40 +/- 0.02 Comments: The WFPC2 images of NGC 4342 Fluxes as follows: V is total V magn SURF(V) = central surface brightness 100 NGC4342-NUC GALAXY, ELLIPTICAL, RA = 12H 23M 39.003S +/- 0.003S, J2000.0 V = +714 V = 12.56 +/- 0.1 NUCLEUS DEC = +7D 3' 13.52" +/- 0.05" B-V = 0.98 +/- 0.07 SURF(V) = 13.40 +/- 0.02 Comments: the center of NGC 4342 SURF(V) = surface brightness at r = 0.0 101 NGC4342- GALAXY, ELLIPTICAL, RA-OFF = +0.0036S +/- 0.005S, J2000.0 V = +714 V = 12.56 +/- 0.1 MAJ1A NUCLEUS DEC-OFF = -0.2440" +/- 0.05", B-V = 0.98 +/- 0.07 FROM 100 SURF(V) = 14.10 +/- 0.02 Comments: +0.25'' offset along major axis SURF(V) = surface brightness at r = 0.25'' 102 NGC4342- GALAXY, ELLIPTICAL, RA-OFF = -0.0036S +/- 0.005S, J2000.0 V = +714 V = 12.56 +/- 0.1 MAJ1B NUCLEUS DEC-OFF = +0.2440" +/- 0.05", B-V = 0.98 +/- 0.07 FROM 100 SURF(V) = 14.10 +/- 0.02 Comments: -0.25'' offset along major axis SURF(V) = surface brightness at r = 0.25'' 111 NGC4342- GALAXY, ELLIPTICAL, RA-OFF = +0.0073S +/- 0.005S, J2000.0 V = +714 V = 12.56 +/- 0.1 MAJ2A NUCLEUS DEC-OFF = -0.4880" +/- 0.05", B-V = 0.98 +/- 0.07 FROM 100 SURF(V) = 14.97 +/- 0.04 Comments: +0.50'' offset along major axis SURF(V) = surface brightness at r = 0.5'' 112 NGC4342- GALAXY, ELLIPTICAL, RA-OFF = -0.0073S +/- 0.005S, J2000.0 V = +714 V = 12.56 +/- 0.1 MAJ2B NUCLEUS DEC-OFF = +0.4880" +/- 0.05", B-V = 0.98 +/- 0.07 FROM 100 SURF(V) = 14.97 +/- 0.04 Comments: -0.50'' offset along major axis SURF(V) = surface brightness at r = 0.5'' 121 NGC4342- GALAXY, ELLIPTICAL, RA-OFF = +0.0163S +/- 0.005S, J2000.0 V = +714 V = 12.56 +/- 0.1 MIN1A NUCLEUS DEC-OFF = -0.0545" +/- 0.05", B-V = 0.98 +/- 0.07 FROM 100 SURF(V) = 14.65 +/- 0.04 Comments: +0.25'' offset along minor axis SURF(V) = surface brightness at r = 0.25'' (minor) 122 NGC4342- GALAXY, ELLIPTICAL, RA-OFF = -0.0163S +/- 0.005S, J2000.0 V = +714 V = 12.56 +/- 0.1 MIN1B NUCLEUS DEC-OFF = +0.0545" +/- 0.05", B-V = 0.98 +/- 0.07 FROM 100 SURF(V) = 14.65 +/- 0.04 Comments: -0.25'' offset along minor axis SURF(V) = surface brightness at r = 0.25'' (minor) 6107( 3) - 12/08/95 15:47 - [ 5] Visit: 01 Visit Requirements: On Hold Comments: Additional Comments: In this visit the WFPC2 images of NGC 4570 will be taken. Total of 3 orbits. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 100 NGC4570 WFPC2 IMAGE PC1-FIX F336W ATD-GAIN = 7 CR 1 2200S END ORBIT -SPLIT = 0.272727 CR- TOLERANCE = 0.05 Comments: The U-Band image of NGC 4570 This exposure will fill entire orbit 1 ------------------------------------------------------------------------------------------------------------------------------------ 101 NGC4570 WFPC2 IMAGE PC1-FIX F336W ATD-GAIN = 7 CR 1 2500S POS TARG 0.5, 0.5 END ORBIT -SPLIT = 0.48 CR-TOLERANCE = 0.05 Comments: The U-Band image of NGC 4570 This exposure will fill entire orbit 2 Offset 11 pixels in x and y direction ------------------------------------------------------------------------------------------------------------------------------------ 102 NGC4570 WFPC2 IMAGE PC1-FIX F336W ATD-GAIN = 7 CR 1 400S POS TARG -0.5, -0.5 -SPLIT = NO Comments: The U-Band image of NGC 4570 This exposure will partly fill orbit 3 Offset 11 pixels in x and y direction ------------------------------------------------------------------------------------------------------------------------------------ 110 NGC4570 WFPC2 IMAGE PC1-FIX F555W ATD-GAIN = 7 CR 1 200S -SPLIT = NO Comments: The V-Band image of NGC 4570 This exposure will fill partly orbit 3 ------------------------------------------------------------------------------------------------------------------------------------ 111 NGC4570 WFPC2 IMAGE PC1-FIX F555W ATD-GAIN = 7 CR 1 200S POS TARG 0.5, 0.5 -SPLIT = NO Comments: The V-Band image of NGC 4570 This exposure will fill partly orbit 3 ------------------------------------------------------------------------------------------------------------------------------------ 120 NGC4570 WFPC2 IMAGE PC1-FIX F814W ATD-GAIN = 7 CR 1 260S -SPLIT = NO Comments: The I-Band image of NGC 4570 This exposure will fill partly orbit 3 ------------------------------------------------------------------------------------------------------------------------------------ 121 NGC4570 WFPC2 IMAGE PC1-FIX F814W ATD-GAIN = 7 CR 1 200S POS TARG 0.5, 0.5 END ORBIT -SPLIT = NO Comments: The I-Band image of NGC 4570 This exposure will fill orbit 3. ------------------------------------------------------------------------------------------------------------------------------------ 6107( 3) - 12/08/95 15:47 - [ 6] Visit: 02 Visit Requirements: On Hold Comments: Additional Comments: In this visit the WFPC2 images of NGC 4342 will be taken. Total of 2 orbits. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 200 NGC4342 WFPC2 IMAGE PC1-FIX F336W ATD-GAIN = 7 CR 1 2200S END ORBIT -SPLIT = 0.272727 CR- TOLERANCE = 0.05 Comments: The U-Band image of NGC 4343 This exposure fills orbit 4 ------------------------------------------------------------------------------------------------------------------------------------ 201 NGC4342 WFPC2 IMAGE PC1-FIX F336W ATD-GAIN = 7 CR 1 1500S POS TARG 0.5, 0.5 -SPLIT = 0.3333 CR-TOLERANCE = 0.05 Comments: The U-band exposure of NGC 4342. Exposure partly fill orbit 5. Offset 11 pixels in x and y direction ------------------------------------------------------------------------------------------------------------------------------------ 210 NGC4342 WFPC2 IMAGE PC1-FIX F555W ATD-GAIN = 7 CR 1 200S -SPLIT = 0.5 CR -TOLERANCE = 0.05 Comments: The V-band image of NGC 4342 Exposure partly fills orbit 5. ------------------------------------------------------------------------------------------------------------------------------------ 220 NGC4342 WFPC2 IMAGE PC1-FIX F814W ATD-GAIN = 7 CR 1 200S -SPLIT = 0.5 CR -TOLERANCE = 0.05 Comments: The I-band image of NGC 4342 End of orbit 5. Final orbit of visit 1. ------------------------------------------------------------------------------------------------------------------------------------ 6107( 3) - 12/08/95 15:47 - [ 7] Visit: 03 Visit Requirements: On Hold Comments: Additional Comments: In this visit the FOS spectra of NGC 4342 will be taken. Total of 5 orbits. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 301 NGC4342 FOS/RD ACQ/PEA 4.3 G570H SCAN-STEP-X = 1 4S ONBOARD ACQ FOR 302 NO SPLIT K 3.36, SCAN-STEP -Y = 0.8, SEARCH-SIZE-X = 2, SEARCH-SIZE- Comments: Exp time yields >1000 counts at center This Y = 7, TYPE = exposure partly fills orbit 6. UP ------------------------------------------------------------------------------------------------------------------------------------ 302 NGC4342 FOS/RD ACQ/PEA 1.0 G570H SCAN-STEP-X = 1 4S ONBOARD ACQ FOR 303 NO SPLIT K 0.5229, SCAN- STEP-Y = 0.6495, SEARCH- SIZE-X = 7, Comments: Exp time yields >1000 counts at center This SEARCH-SIZE-Y = exposure partly fills up orbit 6. 2, TYPE = UP ------------------------------------------------------------------------------------------------------------------------------------ 303 NGC4342 FOS/RD ACQ/PEA 0.5 G570H SCAN-STEP-X = 1 4S ONBOARD ACQ FOR 304 NO SPLIT END ORBIT K 0.2867, SCAN- STEP-Y = 0.2867, SEARCH- SIZE-X = 3, Comments: Exp time yields >1000 counts at center This SEARCH-SIZE-Y = exposure fills orbit 6. 3, TYPE = UP ------------------------------------------------------------------------------------------------------------------------------------ 304 NGC4342 FOS/RD ACQ/PEA 0.3 G570H SCAN-STEP-X = 1 4S ONBOARD ACQ FOR 305 NO SPLIT K 0.1433, SCAN- STEP-Y = 0.1433 SEARCH-SIZE-X = 3, SEARCH-SIZE- Comments: Exp time yields >1000 counts at center This Y = 3, TYPE = exposure partly fills up orbit 7. UP ------------------------------------------------------------------------------------------------------------------------------------ 305 NGC4342 FOS/RD ACQ/PEA 0.3 G570H SCAN-STEP-X = 1 40S ONBOARD ACQ FOR 309-379 NO SPLIT K 0.052, SCAN- STEP-Y = 0.052 SEARCH-SIZE-X = 5, SEARCH-SIZE- Comments: Exp time yields approx. 10000 counts at Y = 5, TYPE = center This exposure fills up orbit 7. Since UP this is the critical peak-up stage the exposure time is longer as for the others. ------------------------------------------------------------------------------------------------------------------------------------ 309 WAVE FOS/RD ACCUM 0.3 G570H 1 DEF NO SPLIT END ORBIT Comments: This is a wave-cal exposure which can be done during occulatation. ------------------------------------------------------------------------------------------------------------------------------------ 6107( 3) - 12/08/95 15:47 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 310 NGC4342-NUC FOS/RD ACCUM 0.3 G570H 1 1000S NO SPLIT Comments: Aperture at nucleus of NGC 4342 This exposure partly fills orbit 8. ------------------------------------------------------------------------------------------------------------------------------------ 320 NGC4342- FOS/RD ACCUM 0.3 G570H 1 1200S NO SPLIT MAJ1A Comments: Aperture at offset +0.25'' along major axis. This exposure fills orbit 8. ------------------------------------------------------------------------------------------------------------------------------------ 329 WAVE FOS/RD ACCUM 0.3 G570H 1 DEF NO SPLIT END ORBIT Comments: This is a wave-cal exposure which can be done during occulatation. ------------------------------------------------------------------------------------------------------------------------------------ 330 NGC4342- FOS/RD ACCUM 0.3 G570H 1 1200S NO SPLIT MAJ1B Comments: Aperture at offset -0.25'' along major axis. This exposure partly fills orbit 9. ------------------------------------------------------------------------------------------------------------------------------------ 340 NGC4342- FOS/RD ACCUM 0.3 G570H 1 900S NO SPLIT MAJ2A Comments: Aperture at offset +0.5'' along major axis. This exposure fills orbit 9. ------------------------------------------------------------------------------------------------------------------------------------ 349 WAVE FOS/RD ACCUM 0.3 G570H 1 DEF NO SPLIT END ORBIT Comments: This is a wave-cal exposure which can be done during occulatation. ------------------------------------------------------------------------------------------------------------------------------------ 350 NGC4342- FOS/RD ACCUM 0.3 G570H 1 900S NO SPLIT MAJ2B Comments: Aperture at offset -0.5'' along major axis. Exposure partly fills orbit 10. ------------------------------------------------------------------------------------------------------------------------------------ 360 NGC4342- FOS/RD ACCUM 0.3 G570H 1 500S NO SPLIT MIN1A Comments: Aperture at offset +0.25'' along minor axis. Exposure partly fills orbit 10. ------------------------------------------------------------------------------------------------------------------------------------ 370 NGC4342- FOS/RD ACCUM 0.3 G570H 1 500S NO SPLIT MIN1B Comments: Aperture at offset -0.25'' along minor axis. Exposure fills orbit 10. ------------------------------------------------------------------------------------------------------------------------------------ 379 WAVE FOS/RD ACCUM 0.3 G570H 1 DEF NO SPLIT END ORBIT Comments: This is a wave-cal exposure which can be done during occulatation. ------------------------------------------------------------------------------------------------------------------------------------ 6107( 3) - 12/08/95 15:47 - [ 9] Summary Form for Proposal 6107 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 FOS/RD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ACQ/PEAK ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ATD-GAIN = 7 CR-SPLIT = 0.272727 CR-TOLERANCE = 0.05 ATD-GAIN = 7 CR-SPLIT = 0.48 CR-TOLERANCE = 0.05 ATD-GAIN = 7 CR-SPLIT = NO ATD-GAIN = 7 CR-SPLIT = 0.3333 CR-TOLERANCE = 0.05 ATD-GAIN = 7 CR-SPLIT = 0.5 CR-TOLERANCE = 0.05 TYPE = UP SEARCH-SIZE-Y = 2 SEARCH-SIZE-Y = 3 SCAN-STEP-Y = 0.1433 SEARCH-SIZE-X = 3 SEARCH-SIZE-Y = 5 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Galaxies & Clusters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements END ORBIT POS TARG 0.5, 0.5 END ORBIT POS TARG -0.5, -0.5 POS TARG 0.5, 0.5 ONBOARD ACQ FOR 302 NO SPLIT ONBOARD ACQ FOR 303 NO SPLIT ONBOARD ACQ FOR 304 NO SPLIT END ORBIT ONBOARD ACQ FOR 305 NO SPLIT ONBOARD ACQ FOR 309-379 NO SPLIT ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F336W F555W F814W G570H ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC4570 NGC4342 WAVE NGC4342-NUC NGC4342-MAJ1A NGC4342-MAJ1B NGC4342-MAJ2A NGC4342-MAJ2B NGC4342-MIN1A NGC4342-MIN1B ------------------------------------------------------------------------------------------------------------------------------------