11638( 2) - 02-Jul-2008 11:22:21 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11638 Version: 2 Check-in Time: 02-Jul-2008 11:22:21 STScI Edit Number: 0 Title Illuminating the HI Structure of a Proto-cluster Region at z=2.84 ------------------------------------------------------------------------------------ Type Cycle GO 17 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Charles C. Steidel California Institute of Technology CoI: Dr. Juna A. Kollmeier Carnegie Institution of Washington N CoI: Prof. Alice E. Shapley University of California - Los Angeles N CoI: Mr. Milan Bogosavljevic California Institute of Technology N CoI: Prof. Max Pettini University of Cambridge N CoI: Dr. Naveen Reddy National Optical Astronomy Observatories, N AURA CoI: Dr. Dawn K. Erb Harvard University N CoI: Mr. David R. Law California Institute of Technology N ------------------------------------------------------------------------------------ Abstract We propose very deep intermediate-band Lyman alpha imaging in the field of a newly-discovered proto-cluster region surrounding the extremely luminous QSO HS1549+19 at z=2.844. The large structure, initially discovered in a spectroscopic survey of galaxies in fields surrounding the brightest QSOs at z=2.5-2.8, represents an ideal laboratory for studying the response of the intergalactic medium to a source of ionizing photons that exceeds the UV background by factors >1000. Within a single pointing of WFC3-UVIS there are already more than 45 known Lyman alpha emitters, most of which are already spectroscopically confirmed, and at least 3 of which are giant ``Lyman alpha blobs''. Many of the objects have properties similar to those expected from the process of fluorescence, in which Lyman alpha emission is induced by the UV radiation field of the QSO in any HI gas that dense enough to remain partially self-shielded. Fortuitously, the F467M filter (Stromgren "b") in WFC3-UVIS is a perfect match to Lyman alpha at z=2.844. In combination with an equally deep broad-band continuum image, the observations will allow the construction of a Lyman alpha map tracing dense gas throughout the inner parts of a proto-cluster region at sub-kpc resolution. The ability to measure the spatial sub-structure and surface brightness distribution of Lya emission, relative to known protocluster galaxies and AGN, will illuminate the ``cosmic web'' in a dense region caught in a violent stage of formation. ------------------------------------------------------------------------------------ Observations Description ------------------------ We are proposing to obtain a total of 6 orbits WFC3/UVIS observations in the F475W filter, and a total of 24 orbits in F467M, in a single field. The program has been split into 6 visits of 5 orbits each, where one orbit is used for F475W and 4 orbits are used for F467M in each visit. The objective is to obtain the same sky coverage for the resulting mosaic while allowing for flexible scheduling- 2 30 degree "ORIENT" ranges have been specified for Visit 1, with Visits 2-6 constrained to have the same ORIENT. The "WFC3-UVIS-MOS-DITH-LINE" pattern has been used to obtain covereage across the gap between the CCDs, but 11638( 2) - 02-Jul-2008 11:22:21 - [ 2] otherwise the point is to maintain the largest area receiving full integration time in each filter. We anticipate using the "multidrizzle" routines for removing cosmic rays and hot pixels. We have made the F467M exposures as long as recommended (half-orbit each), since detector read noise is non-negligible, and to minimize overhead. POS TARG have been used for each of visits 2-6 in order to place the gap between the detectors at slightly different positions for each visit; the same offset is applied to each pattern in a given visit. Real Time Justification ----------------------- None. Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11638( 2) - 02-Jul-2008 11:22:21 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 Q1549-1 UNIDENTIFIED, RA=15H51M52.4803S +/- 0.1", J2000 V = 15.5 +/- 0.2 ULTRAVIOLET EMITTER, DEC=+19D11'4.21" +/- 0.1" X-RAY EMITTER, OPTICAL EMITTER, EMISSION LINE NEBULA Reference Frame: ICRS Comments: This object was generated by the targetselector and retrieved from the 2MASS database. It is a QSO, with V~15.5. ------------------------------------------------------------------------------------------------------------------------------------ 11638( 2) - 02-Jul-2008 11:22:21 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-MOS-DITH-LINE WFC3-UVIS-MOS-DITH-LINE Pattern_Purpose MOSAIC DITHER Number_Of_Points 2 2 Point_Spacing 2.4 0.119 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 85.754 33.606 Angle_Between_Sides Center_Pattern YES NO ------------------------------------------------------------------------------------------------------------------------------------ 11638( 2) - 02-Jul-2008 11:22:21 - [ 5] Visit: 01 Visit Requirements: ORIENT 250D TO 280 D; ORIENT 70D TO 100 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F475W CR-SPLIT=NO 1 600 S PATTERN 1 1 S ER see below ------------------------------------------------------------------------------------------------------------------------------------ 2 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S PATTERN 1 2 S ER see below ------------------------------------------------------------------------------------------------------------------------------------ 3 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S PATTERN 1 3 S ER see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 2 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 2 none none 1 633.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 3 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 3 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 5 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 5 1463.0 S S TER 11638( 2) - 02-Jul-2008 11:22:21 - [ 6] Visit: 02 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F475W CR-SPLIT=NO 1 600 S POS TARG 0.356 , 4.786; S ER see below PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG 0.356, 4.786; S ER see below PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG 0.356, 4.786; S ER see below PATTERN 1 3 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 2 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 2 none none 1 633.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 3 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 3 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 5 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 5 1463.0 S S TER 11638( 2) - 02-Jul-2008 11:22:21 - [ 7] Visit: 03 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F475W CR-SPLIT=NO 1 600 S POS TARG -0.356, -4.786; S ER see below PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG -0.356, -4.786; S ER see below PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG -0.356, -4.786; S ER see below PATTERN 1 3 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 2 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 2 none none 1 633.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 3 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 3 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 5 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 5 1463.0 S S TER 11638( 2) - 02-Jul-2008 11:22:21 - [ 8] Visit: 04 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F475W CR-SPLIT=NO 1 600 S POS TARG 0.178, 2.393; S ER see below PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG 0.178, 2.393; S ER see below PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG 0.178, 2.393; S ER see below PATTERN 1 3 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 2 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 2 none none 1 633.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 3 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 3 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 5 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 5 1463.0 S S TER 11638( 2) - 02-Jul-2008 11:22:21 - [ 9] Visit: 05 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F475W CR-SPLIT=NO 1 600 S POS TARG -0.178, -2.393; S ER see below PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG -0.178, -2.393; S ER see below PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG -0.178, -2.393; S ER see below PATTERN 1 3 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 2 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 2 none none 1 633.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 3 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 3 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 5 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 5 1463.0 S S TER 11638( 2) - 02-Jul-2008 11:22:21 - [ 10] Visit: 06 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F475W CR-SPLIT=NO 1 600 S POS TARG -0.267, -3.590; S ER see below PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG -0.267, -3.590; S ER see below PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 Q1549-1 WFC3/UVI ACCUM UVIS-CENT F467M CR-SPLIT=NO 1 1400 S POS TARG -0.267, -3.590; S ER see below PATTERN 1 3 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 1 2 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 1 none none 1 633.0 S S TER Q1549-1 1 WFC3/UVI ACCUM UVIS-CEN F475W 2 2 none none 1 633.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 2 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 3 1463.0 S S TER Q1549-1 2 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 3 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 1 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 1 2 none none 4 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 1 none none 5 1463.0 S S TER Q1549-1 3 WFC3/UVI ACCUM UVIS-CEN F467M 2 2 none none 5 1463.0 S S TER 11638( 2) - 02-Jul-2008 11:22:21 - [ 11] Summary Form for Proposal 11638 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-CENTER ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 250D TO 280 D, ORIENT 70D TO 100 D, PATTERN 1 1, PATTERN 1 2, PATTERN 1 3, POS TARG -0.178, -2.393, POS TARG -0.267, -3.590, POS TARG -0.356, -4.786, POS TARG 0.178, 2.393, POS TARG 0.356 , 4.786, POS TARG 0.356, 4.786, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F467M, F475W ------------------------------------------------------------------------------------------------------------------------------------ Target Names Q1549-1 ------------------------------------------------------------------------------------------------------------------------------------