6633( 10) - 12/11/98 15:51 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6633 Version: 10 Check-in Date: 02-Feb-1998 16:52:14 1.Proposal Title: Cusps or cores in barred bulges? ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 6 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Marcella Carollo The Johns Hopkins University CoI: P.\ Tim de Zeeuw Sterrewacht Leiden N CoI: Ken C. Freeman Mt. Stromlo Obs. N ------------------------------------------------------------------------------------ 5. Abstract We request time with the WFPC2 to image the bulges of 9 barred lenticular galaxies and those of 3 barred early-type spiral galaxies. These are highly triaxial, tumbling, low-mass stellar systems. They have mixed physical properties compared to the massive, pressure-supported, triaxial giant ellipticals (where HST has detected flat cores), and to the small, fast- rotating, almost axisymmetric low-mass normal galaxies (where HST has detected steep cusps). The nuclear properties of barred galaxies will reveal essential information on (i) the role of processes such as dissipation or merging in galaxy formation and evolution, and (ii) the relevance of dynamical effects (such as the appearance of box or stochastic orbits in triaxial potentials) on the growth or disruption of steep cusps. Our main goal is to determine: 1) the morphology of the nuclei of barred systems, i.e., whether they are core- or cusp-type; 2) the nuclear color gradients and the differences in colors between the nuclei and the surrounding galactic regions; 3) the presence of unresolved central point sources, and their colors; and 4) the presence, distribution and dynamical state of nuclear dust. For this purpose, we will take B, V and I images for each target. ------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 2] Observations Description ------------------------ We will obtain broad band F450W (Johnson B), F555W (Johnson V) and F814W (Johnson I) images for the 12 objects of our sample. Ground-based photometry indicates central values of surface brightness ranging from 17.5 to 18.7 V magnitudes per square arcsec. Typical B-V colors are in the range 0.88-1.0 and V-I of about 1.2, with the exception of NGC 2633 (a starforming IRAS source, B- V=0.60), NGC 3516 (a well-known Seyfert, B-V=0.76) and NGC 4500 (a Markarian galaxy, B- V=0.62). Previous WFPC2 observations of galactic nuclei show that the nuclear surface brightness observed with HST is usually about two magnitudes brighter in the central pixel than the groundbased value (at ~ 2 arcsec). Therefore we adopt 16.5 as a typical expected value for the central surface brightness of our sources in V. Using the Exposure Calculator available on the WFPC group Web page (and based on eq. 6.1 and Tables 6.1 and 6.2 of the WFPC2 handbook) we estimate the following exposure times: in F450W, 2600 seconds; in F555W, 1000 seconds; in F814W, 700 seconds. The equivalent background (due to the combined effects of sky emission, dark current and read- out-noise) is <100 photons, and hence is negligible. On average, the implied total number of photons per pixel is ~5000 in V and I, with a signal to noise ratio of ~100 if the sample objects turn out to have cuspy cores, or 50 otherwise. The signal-to-noise in the B band should instead be about 40. The V and I S/N is of the same order as the S/N of e.g., the WFPC2 images of Franx et al.\\\\ (ID 5454) for early-type galaxies. Based on our experience on these images (Carollo et al.\\\\ 1995), this S/N is adequate for a proper investigation of the nuclear properties of the galaxies of our sample. The total integrations for each filter and target will be taken in two separate exposures (CR-split), so as to allow an accurate cosmic ray subtraction. The images will be taken with the galaxies centered on PC1. Number of orbits \\\\medskip All our galaxies are observable in CVZ. Therefore their visibility is 96 minutes per orbit. Guide star acquisition takes 8 minutes. A CR-split image requires a 5 minutes overhead. The overheads are taken as given in the Proposal Instruction Manual. The total overhead time is therefore 23 minutes, leaving 73 minutes on target. The estimated exposure times for B, V and the I filters are such that 1 orbit per galaxy is requested. NOTE: Target 4, NGC 2842, has been replaced by NGC 2685 due to scheduling difficulties at request of PI and with USCC approval. Real Time Justification ----------------------- NONE Calibration Justification ------------------------- NONE Additional Comments ------------------- Most of the targets are CVZ targets. ------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 3] Data Distribution Paper Products: Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC1543 GALAXY, SPIRAL RA=4H 12M 43.5S +/- 0.1S, DEC=- J2000 V = 1094 V = 10.23 57D 44' 15.2" +/- 0.1", PLATE- B-V = 0.95 ID=02IC 2 NGC2633 GALAXY, SPIRAL RA=8H 48M 04.14S +/- 0.1S, J2000 V = 2169 V = 11.65 DEC=74D 05' 55.56" +/- 0.1", B-V = 0.66 PLATE-ID=01L1 3 NGC2787 GALAXY, SPIRAL RA=9H 19M 18.51S +/- 0.1S, J2000 V = 649 V = 10.59 DEC=69D 12' 11.1" +/- 0.1", B-V = 1.06 PLATE-ID=01L2 4 NGC2685 GALAXY, SPIRAL, RA=08H 55M 34.684S +/- 0.1S, J2000 V = 876 V = 11.9 LENTICULAR, INTERACTING DEC=58D 44' 03.33" +/- 0.1", B-V = 0.83 GALAXY, BULGE, POLAR PLATE-ID=01OI RING 5 NGC2880 GALAXY, SPIRAL RA=9H 29M 34.57S +/- 0.1S, J2000 V = 1551 V = 11.61 DEC=62D 29' 26.19" +/- 0.1", B-V = 0.92 PLATE-ID=02RH 6 NGC2950 GALAXY, SPIRAL RA=9H 42M 35.12S +/- 0.1S, J2000 V = 1337 V = 10.96 DEC=58D 51' 04.43" +/- 0.1", B-V = 0.90 PLATE-ID=02AH 7 NGC3516 GALAXY, SPIRAL RA=11H 6M 47.51S +/- 0.1S, J2000 V = 2624 V = 11.54 DEC=72D 34' 6.94" +/- 0.1", B-V = 0.80 PLATE-ID=01L3 8 NGC3945 GALAXY, SPIRAL RA=11H 53M 13.59S +/- 0.1S, J2000 V = 1220 V = 10.41 DEC=60D 40' 32.1" +/- 0.1", B-V = 0.95 PLATE-ID=01QZ 9 NGC4500 GALAXY, SPIRAL RA=12H 31M 22.19S +/- 0.1S, J2000 V = 3115 V = 12.42 DEC=57D 57' 52.2" +/- 0.1", B-V = 0.60 PLATE-ID=01R1 10 NGC6654 GALAXY, SPIRAL RA=18H 24M 07.53S +/- 0.1S, J2000 V = 1891 V = 11.44 DEC=73D 10' 59.32" +/- 0.1", B-V = 0.97 PLATE-ID=01L8 11 NGC6684 GALAXY, SPIRAL RA=18H 48M 57.86S +/- 0.1S, DEC= J2000 V = 847 V = 10.17 -65D 10' 25.2" +/- 0.1", PLATE- B-V = 0.92 ID=02EU 12 NGC7098 GALAXY, SPIRAL RA=21H 44M 16.68S +/- 0.1S, DEC= J2000 V = 2399 V = 10.70 -75D 6' 39.4" +/- 0.1", PLATE- B-V = 0.95 ID=00RM 6633( 10) - 12/11/98 15:51 - [ 5] Visit: 01 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 NGC1543 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=0.429 1 2100 S ------------------------------------------------------------------------------------------------------------------------------------ 12 NGC1543 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=0.417 1 1250 S ------------------------------------------------------------------------------------------------------------------------------------ 13 NGC1543 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=0.389 1 950 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 6] Visit: 02 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 21 NGC2633 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 22 NGC2633 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 1400 S ------------------------------------------------------------------------------------------------------------------------------------ 23 NGC2633 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 24 NGC2633 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 25 NGC2633 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 250 S ------------------------------------------------------------------------------------------------------------------------------------ 26 NGC2633 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 7] Visit: 03 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 31 NGC2787 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 32 NGC2787 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 1400 S ------------------------------------------------------------------------------------------------------------------------------------ 33 NGC2787 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 34 NGC2787 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 35 NGC2787 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 250 S ------------------------------------------------------------------------------------------------------------------------------------ 36 NGC2787 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 8] Visit: 04 Visit Priority: Visit Requirements: ORIENT 160D TO 180D CVZ On Hold Comments: Additional Comments: This ORIENT range is strongly preferred for maximizing the scientific content of the data in the Archive since it may then be much more useful for multiple scientific purposes, e.g. covering most of the polar ring and half of the faint outer ring, but the ORIENT may be removed completely by STScI if absolutely necessary for scheduling. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 41 NGC2685 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 42 NGC2685 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 1400 S ------------------------------------------------------------------------------------------------------------------------------------ 43 NGC2685 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 44 NGC2685 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 45 NGC2685 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 250 S ------------------------------------------------------------------------------------------------------------------------------------ 46 NGC2685 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 9] Visit: 05 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 51 NGC2880 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 52 NGC2880 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 1400 S ------------------------------------------------------------------------------------------------------------------------------------ 53 NGC2880 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 54 NGC2880 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 55 NGC2880 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 250 S ------------------------------------------------------------------------------------------------------------------------------------ 56 NGC2880 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 10] Visit: 06 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 61 NGC2950 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 62 NGC2950 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 1400 S ------------------------------------------------------------------------------------------------------------------------------------ 63 NGC2950 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 64 NGC2950 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 65 NGC2950 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 250 S ------------------------------------------------------------------------------------------------------------------------------------ 66 NGC2950 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 11] Visit: 07 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 71 NGC3516 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 72 NGC3516 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 1400 S ------------------------------------------------------------------------------------------------------------------------------------ 73 NGC3516 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 74 NGC3516 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 75 NGC3516 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 250 S ------------------------------------------------------------------------------------------------------------------------------------ 76 NGC3516 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 12] Visit: 08 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 81 NGC3945 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=0.429 1 2100 S ------------------------------------------------------------------------------------------------------------------------------------ 82 NGC3945 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=0.417 1 1250 S ------------------------------------------------------------------------------------------------------------------------------------ 83 NGC3945 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=0.389 1 950 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 13] Visit: 09 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 91 NGC4500 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 92 NGC4500 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 1400 S ------------------------------------------------------------------------------------------------------------------------------------ 93 NGC4500 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 94 NGC4500 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 95 NGC4500 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 250 S ------------------------------------------------------------------------------------------------------------------------------------ 96 NGC4500 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 14] Visit: 10 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC6654 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=0.5 1 1900 S ------------------------------------------------------------------------------------------------------------------------------------ 3 NGC6654 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=0.5 1 550 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 15] Visit: 11 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 14 NGC6684 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=0.429 1 2100 S ------------------------------------------------------------------------------------------------------------------------------------ 15 NGC6684 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=0.417 1 1250 S ------------------------------------------------------------------------------------------------------------------------------------ 16 NGC6684 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=0.389 1 950 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 16] Visit: 12 Visit Priority: Visit Requirements: CVZ On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 24 NGC7098 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 900 S ------------------------------------------------------------------------------------------------------------------------------------ 25 NGC7098 WFPC2 IMAGE PC1-FIX F450W CR-SPLIT=NO 1 1400 S ------------------------------------------------------------------------------------------------------------------------------------ 26 NGC7098 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 300 S ------------------------------------------------------------------------------------------------------------------------------------ 27 NGC7098 WFPC2 IMAGE PC1-FIX F555W CR-SPLIT=NO 1 700 S ------------------------------------------------------------------------------------------------------------------------------------ 28 NGC7098 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 250 S ------------------------------------------------------------------------------------------------------------------------------------ 29 NGC7098 WFPC2 IMAGE PC1-FIX F814W CR-SPLIT=NO 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 6633( 10) - 12/11/98 15:51 - [ 17] Summary Form for Proposal 6633 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=0.429 CR-SPLIT=0.417 CR-SPLIT=0.389 CR-SPLIT=NO CR-SPLIT=0.5 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CVZ ORIENT 160D TO 180D CVZ ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F450W F555W F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC1543 NGC2633 NGC2787 NGC2685 NGC2880 NGC2950 NGC3516 NGC3945 NGC4500 NGC6654 NGC6684 NGC7098 ------------------------------------------------------------------------------------------------------------------------------------