6458( 6) - 01/22/99 14:30 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6458 Version: 6 Check-in Date: 24-Jan-1998 15:00:57 1.Proposal Title: IMAGING OF QSO HOST GALAXIES AT Z >2 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 6 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: John Hutchings Dominion Astrophysical Observatory CoI: Susan Neff Goddard Space Flight Center N CoI: Robert Hanisch Space Telescope Science Institute N CoI: Andrew Boden Jet Propulsion Laboratory N CoI: David Redding Jet Propulsion Laboratory N ------------------------------------------------------------------------------------ 5. Abstract QSOs of redshift larger than 2 have been resolved with ~arcsecond resolution on 4m- class ground-based telescopes. Both line and continuum flux have been detected over a few arcseconds, but the nature of the extended emission, and its relation to the nuclear energy source is unclear. However their (UV rest-frame) fluxes suggest they are galaxies with star-formation on a very large scale. Deep WFPC2 images are proposed in two colours to resolve and characterize selected high redshift QSOs whose host galaxies have been detected. We propose specially designed PSF observations for prescription retrieval modelling to deal with the problematic nuclear point source contamination. We will also combine the HST data with ground- based adaptive-optics images from the Canada-France- Hawaii Telescope, to increase the signal and resolution in the fainter regions. ------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 2] Observations Description ------------------------ We are proposing specific PSF observation sequences as a unique database to derive the optical configuration of the HST at the time of the science observations. This will be done using prescription retrieval techniques (Redding et al, App.Opt.32, 10, 1993; Redding et al, WFPC2 calib wrkshp 1995). Prescription retrieval is the process of deriving the optical state of a system by parameter estimation techniques using input image data. We will solve for the HST configuration in our science observations using our previous estimates of PC prescription, the deep data obtained in this observing program, and WFPC2 focus-run data obtained by Krist and Burrows (App.Opt. 1995 in press). In addition to optical parameters, there will be significant PSF effects from CCD detector non-linearities: saturation, blooming, and residual image. These effects are common to all observing programs, and we will work closely with the WFPC2 team at JPL and others at DAO to account for these effects properly. Our ability to predict and subtract the scaled PSF requires understanding the prediction error with small variations in source spectral content, field, and registration. We intend to quantify our ability to predict the PSF at differing source locations, registrations, and exposures by a variety of methods. First, we will quantify PSF prediction errors based on prescription model parameter uncertainties and standard error propagation calculations. Second, we will use bootstrap statistical techniques on our PSF exposures and study the predictive power with fit models based on subsets of the data scored against the remainder of the data. Finally, we will use other stars in the PSF field, independent PSF fields, and stars in the target QSO fields, as empirical checks on the errors. Because of the temporal variations in the HST optical state and variation in low- level PSF features with HST focus, we need to obtain the PSF data contemporaneously with the QSO observations (i.e., within a few days if at all possible, and certainly within a few weeks). The PSF exposures need to be at least as deep (in terms of PSF detail) as the QSO observations so that all PSF structures in the QSO frames can be removed. The proposed PSF observations will require 4 HST orbits to complete. The data set will consist of four sequences of exposures of a star in each of the two filters (F606W and F702W) being used for the QSO observations. These four sequences correspond to four field positions: the center and the vertices of a triangle surrounding the nominal PC chip position for the QSOs. The pattern is ~3 arcsec on a side (to match the nominal positioning accuracy of targets on the WFPC2 focal plane), and oriented at an angle with respect to the CCD rows and columns, to provide both minimum overlap of PSF diffraction features and maximum prescription retrieval fitting leverage in determining alignment parameters. Each exposure sequence will contain pairs of exposures with durations of 0.23 sec, 10 sec, and 80 sec. The paired exposures will be used to both minimize the effect of noise in the prescription retrievals and to identify cosmic ray events (we do not need three or more exposures for cosmic ray removal in the prescription retrieval work --- all that is needed is to identify suspect bad pixels and give them zero weight in the fitting procedures). The shortest exposures are designed to properly expose the PSF core and enable accurate registration of the PSF with the QSO cores. The 0.23-second exposure time is the minimum WFPC2 exposure time for which the PSF characteristics are unaffected by the shutter flight time. This range of exposure times will provide measurements of PSF features over the dynamic range of the science observations; PSF features that are factors of 10^4 and 10^5 weaker than the core will be measured at S/N approximately 35 and 8.5 respectively. Including instrumental overheads, each sequence requires approximately 19 minutes to complete. We are limited by the maximum number (14) of WFPC2 images per orbit, but can complete 2 sequences per orbit fairly efficiently. The sequences will be chosen to avoid pixels affected by the residual image from previous saturated exposures. The PSF target will be chosen to be of the magnitude (V~11) to provide the proper signal on the faint PSF features, yet not saturate in the short exposures. It must also be of spectral type mid-A to match the (redshifted) spectral energy distribution of the QSOs. Finally, it must be sufficiently isolated to avoid confusion from fainter stars. If we use a CVZ field we might also be able to obtain an additional pair of (180sec) exposures on a secondary more crowded field to test registration and colour effects, without using more orbits. Ideally the PSF observations would include deliberate focus diversity measurements: i.e. by moving the secondary mirror. Such measurements would increase the PSF observing time requirements and are also not likely to be embraced by HST operations. We believe that we can utilize archival focus-run data sets to establish the basic HST/WFPC2 prescription parameters (work now in progress) and use the additional PSF observations described here to fine-tune the optical model. The QSO target images will be taken centred in the PC with the two filters (F606W and F702W). Exposures will be of order two orbits (4000 sec) per filter, and will be read out 3 times for cosmic ray removal, or as often as needed to minimize saturation in the nuclei. Real Time Justification ----------------------- The PSF observations are designed to be used for all the QSOs in the program. Because the HST OTA is still changing over times of months, we request that all the observations in this program be completed within 4-6 weeks, and that this period not include any major focus or secondary mirror movements. This consideration overrides that of dark-time, since the planned PSF observations will also measure any scattered light that may be caused by the bright earth. We plan to enable another 2 exposures by choosing the PSF observation field in the CVZ. However, this is not a requirement. As mentioned in the science section, supporting CFHT observations are proposed. Simultaneity is not required. The HST observations on their own will be of unique importance, and some CFHT data exist already. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 3] Data Distribution Paper Products: Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 0033+098 GALAXY, QSO RA=0H 36M 23.8S +/- .1S, DEC=10D 2000 Z=1.91 V = 17.5 7' 59" +/- 1", PLATE-ID=028X 2 0225-014 GALAXY, QSO RA=2H 28M 7.8S +/- .1S, DEC=-1D 2000 Z=2.04 V = 18.2 15' 41" +/- 1", PLATE-ID=023B 3 0820+296 GALAXY, QSO RA=8H 23M 41.1S +/- .1S, DEC=29D 2000 Z=2.3 V = 18.5 28' 28" +/- 1", PLATE-ID=02HB 4 1338+277 GALAXY, QSO RA=13H 40M 52.1S +/- .1S, 2000 Z=2.28 V = 20.0 DEC=27D 31' 5" +/- 1", PLATE- ID=009L 5 2244-010 GALAXY, QSO RA=22H 46M 49.2S +/- .1S, DEC=- 2000 Z=2.03 V = 18.0 0D 49' 55" +/- 1", PLATE-ID=015P 6 FEIGE23 STAR, B6-B9.5 V-IV RA=2H 32M 17.2S +/- .1S, DEC=2D J2000 V = 11.1 59' 52.2" +/- 1", PLATE-ID=04YG B-V = -0.10 U-B = -0.40 6458( 6) - 01/22/99 14:30 - [ 5] Visit: 01 Visit Priority: Visit Requirements: ORIENT 270D TO 120D On Hold Comments: Additional Comments: We request that all Visits of this proposal, GO-6458, be scheduled prior to SM97. The reason is that we want to have maximum stability of the PSF and are concerned that splitting Visits across SM97 could introduce changes in the OTA that make our PSF calibrations invalid. We could also have all Visits done after SM97, but the scheduling windows favor times in fall 1996 and early in 1997. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 0033+098 WFPC2 IMAGE PC1-FIX F606W 3 1550 S ------------------------------------------------------------------------------------------------------------------------------------ 5 0033+098 WFPC2 IMAGE PC1-FIX F702W CR-SPLIT=NO 4 1300 S ------------------------------------------------------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 6] Visit: 02 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 ------------------------------------------------------------------------------------------------------------------------------------ 20 2244-010 WFPC2 IMAGE PC1-FIX F606W 2 2500 S ------------------------------------------------------------------------------------------------------------------------------------ 22 2244-010 WFPC2 IMAGE PC1-FIX F702W CR-SPLIT=NO 2 2700 S ------------------------------------------------------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 7] Visit: 03 Visit Priority: Visit Requirements: GROUP 3-4 WITHIN 28D ORIENT 200D TO 310D On Hold Comments: Additional Comments: Best roll angle is 290D. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S ------------------------------------------------------------------------------------------------------------------------------------ 12 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S ------------------------------------------------------------------------------------------------------------------------------------ 13 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S ------------------------------------------------------------------------------------------------------------------------------------ 14 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S POS TARG 3.2085,-0.6555 ------------------------------------------------------------------------------------------------------------------------------------ 15 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S SAME POS AS 14 ------------------------------------------------------------------------------------------------------------------------------------ 16 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S SAME POS AS 14 ------------------------------------------------------------------------------------------------------------------------------------ 21 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S POS TARG -2.3575, 3.6915 ------------------------------------------------------------------------------------------------------------------------------------ 22 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S SAME POS AS 21 ------------------------------------------------------------------------------------------------------------------------------------ 23 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S SAME POS AS 21 ------------------------------------------------------------------------------------------------------------------------------------ 24 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S POS TARG -4.6805,-10.7755 ------------------------------------------------------------------------------------------------------------------------------------ 25 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S SAME POS AS 24 ------------------------------------------------------------------------------------------------------------------------------------ 26 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S SAME POS AS 24 ------------------------------------------------------------------------------------------------------------------------------------ 27 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S POS TARG -11.4885, 1.3915 ------------------------------------------------------------------------------------------------------------------------------------ 31 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S POS TARG 2.6335,-0.6785 ------------------------------------------------------------------------------------------------------------------------------------ 32 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S SAME POS AS 31 ------------------------------------------------------------------------------------------------------------------------------------ 33 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S SAME POS AS 31 ------------------------------------------------------------------------------------------------------------------------------------ 34 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S POS TARG -2.9325, 3.6685 ------------------------------------------------------------------------------------------------------------------------------------ 35 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S SAME POS AS 34 ------------------------------------------------------------------------------------------------------------------------------------ 36 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S SAME POS AS 34 ------------------------------------------------------------------------------------------------------------------------------------ 41 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S POS TARG -5.2555,-10.7985 ------------------------------------------------------------------------------------------------------------------------------------ 42 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S SAME POS AS 41 ------------------------------------------------------------------------------------------------------------------------------------ 43 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S SAME POS AS 41 ------------------------------------------------------------------------------------------------------------------------------------ 44 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S POS TARG -0.5750,-0.0230 ------------------------------------------------------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 45 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S SAME POS AS 44 ------------------------------------------------------------------------------------------------------------------------------------ 46 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S SAME POS AS 44 ------------------------------------------------------------------------------------------------------------------------------------ 47 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 100 S POS TARG -12.0635, 1.3685 ------------------------------------------------------------------------------------------------------------------------------------ 111 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 0.23 S POS TARG -2.3575, 3.6915 ------------------------------------------------------------------------------------------------------------------------------------ 112 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 4 S SAME POS AS 111 ------------------------------------------------------------------------------------------------------------------------------------ 113 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 100 S SAME POS AS 111 ------------------------------------------------------------------------------------------------------------------------------------ 114 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 0.23 S POS TARG -4.6805,-10.7755 ------------------------------------------------------------------------------------------------------------------------------------ 115 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 4 S SAME POS AS 114 ------------------------------------------------------------------------------------------------------------------------------------ 116 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 100 S SAME POS AS 114 ------------------------------------------------------------------------------------------------------------------------------------ 121 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 0.23 S ------------------------------------------------------------------------------------------------------------------------------------ 122 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 4 S ------------------------------------------------------------------------------------------------------------------------------------ 123 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 100 S ------------------------------------------------------------------------------------------------------------------------------------ 124 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 0.23 S POS TARG 3.2085,-0.6555 ------------------------------------------------------------------------------------------------------------------------------------ 125 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 4 S SAME POS AS 124 ------------------------------------------------------------------------------------------------------------------------------------ 126 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 100 S SAME POS AS 124 ------------------------------------------------------------------------------------------------------------------------------------ 127 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 4 S POS TARG -11.4885, 1.3915 ------------------------------------------------------------------------------------------------------------------------------------ 131 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 0.23 S POS TARG -5.2555,-10.7985 ------------------------------------------------------------------------------------------------------------------------------------ 132 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 4 S SAME POS AS 131 ------------------------------------------------------------------------------------------------------------------------------------ 133 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 100 S SAME POS AS 131 ------------------------------------------------------------------------------------------------------------------------------------ 134 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 0.23 S POS TARG -0.5750,-0.0230 ------------------------------------------------------------------------------------------------------------------------------------ 135 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 4 S SAME POS AS 134 ------------------------------------------------------------------------------------------------------------------------------------ 136 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 100 S SAME POS AS 134 ------------------------------------------------------------------------------------------------------------------------------------ 141 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 0.23 S POS TARG 2.6335,-0.6785 ------------------------------------------------------------------------------------------------------------------------------------ 142 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 4 S SAME POS AS 141 ------------------------------------------------------------------------------------------------------------------------------------ 143 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 100 S SAME POS AS 141 ------------------------------------------------------------------------------------------------------------------------------------ 144 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 0.23 S POS TARG -2.9325, 3.6685 ------------------------------------------------------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 9] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 145 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 4 S SAME POS AS 144 ------------------------------------------------------------------------------------------------------------------------------------ 146 FEIGE23 WFPC2 IMAGE PC1-FIX F702W 1 100 S SAME POS AS 144 ------------------------------------------------------------------------------------------------------------------------------------ 147 FEIGE23 WFPC2 IMAGE PC1-FIX F606W 1 0.23 S POS TARG -11.4885, 1.3915 ------------------------------------------------------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 10] Visit: 04 Visit Priority: Visit Requirements: ORIENT 300D TO 30D 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 ------------------------------------------------------------------------------------------------------------------------------------ 30 0225-014 WFPC2 IMAGE PC1-FIX F606W 2 2500 S ------------------------------------------------------------------------------------------------------------------------------------ 34 0225-014 WFPC2 IMAGE PC1-FIX F702W CR-SPLIT=NO 2 2700 S ------------------------------------------------------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 11] Visit: 05 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 ------------------------------------------------------------------------------------------------------------------------------------ 50 0820+296 WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 1 2600 S ------------------------------------------------------------------------------------------------------------------------------------ 51 0820+296 WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 1 2700 S ------------------------------------------------------------------------------------------------------------------------------------ 52 0820+296 WFPC2 IMAGE PC1-FIX F702W CR-SPLIT=NO 2 2700 S ------------------------------------------------------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 12] Visit: 06 Visit Priority: Visit Requirements: ORIENT 240D TO 90D 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 ------------------------------------------------------------------------------------------------------------------------------------ 60 1338+277 WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 1 2600 S ------------------------------------------------------------------------------------------------------------------------------------ 61 1338+277 WFPC2 IMAGE PC1-FIX F606W CR-SPLIT=NO 1 2700 S ------------------------------------------------------------------------------------------------------------------------------------ 62 1338+277 WFPC2 IMAGE PC1-FIX F702W CR-SPLIT=NO 2 2700 S ------------------------------------------------------------------------------------------------------------------------------------ 6458( 6) - 01/22/99 14:30 - [ 13] Summary Form for Proposal 6458 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 270D TO 120D GROUP 3-4 WITHIN 28D ORIENT 200D TO 310D POS TARG 3.2085,-0.6555 SAME POS AS 14 POS TARG -2.3575, 3.6915 SAME POS AS 21 POS TARG -4.6805,-10.7755 SAME POS AS 24 POS TARG -11.4885, 1.3915 POS TARG 2.6335,-0.6785 SAME POS AS 31 POS TARG -2.9325, 3.6685 SAME POS AS 34 POS TARG -5.2555,-10.7985 SAME POS AS 41 POS TARG -0.5750,-0.0230 SAME POS AS 44 POS TARG -12.0635, 1.3685 SAME POS AS 111 SAME POS AS 114 SAME POS AS 124 SAME POS AS 131 SAME POS AS 134 SAME POS AS 141 SAME POS AS 144 ORIENT 300D TO 30D ORIENT 240D TO 90D ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F606W F702W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 0033+098 2244-010 FEIGE23 0225-014 0820+296 1338+277 ------------------------------------------------------------------------------------------------------------------------------------