12446( 7) - 04-May-2011 17:02:02 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12446 Version: 7 Check-in Time: 04-May-2011 17:02:02 STScI Edit Number: 3 Title Ionization and Light Echoes in the T Pyxidis Nebula ------------------------------------------------------------------------------------ Type Cycle GO/DD 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Michael Shara American Museum of Natural History CoI: Dr. Howard E. Bond Space Telescope Science Institute N CoI: Prof. Bradley E. Schaefer Louisiana State University and A & M N College CoI: Dr. David R. Zurek American Museum of Natural History N CoI: Ms. Ashley Pagnotta Louisiana State University and A & M N College CoI: Dr. Robert E. Williams Space Telescope Science Institute N CoI: Prof. Dina Prialnik Tel Aviv University - Wise Observatory N CoI: Prof. Edward M. Sion Villanova University N CoI: Dr. Patrick Godon Villanova University N CoI: Dr. Mordecai-Mark Mac Low American Museum of Natural History N CoI: Dr. Jayashree Torasakar American Museum of Natural History N CoI: Dr. William B. Sparks Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract Contrary to published predictions, the famous prototype recurrent nova T Pyxidis unexpectedly commenced a new outburst on 2011 April 14 UT --- its first outburst since 1966. T Pyx is unique among recurrent novae in being surrounded by a nebula, representing material ejected during previous eruptions, which is well resolved into thousands of sub-arcsecond features in HST images. The outburst offers the opportunity to make two unique measurements. (1) A direct geometric determination of the distance to T Pyx (a highly controversial subject), based on imaging polarimetry of the knots --- a technique already validated for the light echo around V838 Monocerotis. (2) A determination of the 3D structure of the nebula, based on the ionization echo that will sweep out into the nebula, causing each individual knot to develop strong Halpha emission when first illuminated by the nova. Our proposed observations consist of Halpha imaging with WFC3, and broadband polarimetric imaging with ACS. Our results will 1) Allow a determination of the distance, and hence the true luminosity and mass accretion rate onto the white dwarf in T Pyx. This is essential for determining if T Pyx (and other recurrent novae) will exceed the Chandrasekhar limit and erupt as a type Ia SN. 2) Allow a direct test of the most detailed numerical modeling of nova explosions ever done. Recently predicted features and geometries in the ejecta must be present, and will be observed by HST for the first time, if, and only if our state-of-the-art models of novae are correct. The wave of illumination and ionization will pass through the entire nebula within the next few months, so it is crucial to begin the HST observations as soon as possible. ------------------------------------------------------------------------------------ 12446( 7) - 04-May-2011 17:02:02 - [ 2] Observations Description ------------------------ We request the first Halpha observation to be made as soon as possible, nominally about 7-10 days after the outburst begins. After that, images should be obtained at about 14, 24, 38, 58, 86, 109, 155, 190, and 225 days after April 14. (The gap between 109 and 155 days is due to T Pyx being too close to the Sun during that interval.) We also request two visits for the polarimetric imaging, at about 20 and 30 days after April 14. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12446( 7) - 04-May-2011 17:02:02 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 T-PYXIDIS ISM, EJECTA, SHELL RA=09H04M41.5000S +/- 0.1", J2000 V = 11.0 +/- 1.0 DEC=-32D22'47.50" +/- 0.1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 12446( 7) - 04-May-2011 17:02:02 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 12446( 7) - 04-May-2011 17:02:02 - [ 5] Visit: 01 Visit Requirements: 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 T-PYXIDIS WFC3/UVI ACCUM UVIS2-C1K F656N CR-SPLIT=3 1 480 S PATTERN 1 1 S 1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 3 1 N/A S K1C-SUB 12446( 7) - 04-May-2011 17:02:02 - [ 6] Visit: 02 Visit Requirements: ORIENT 108D TO 118 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 T-PYXIDIS WFC3/UVI ACCUM UVIS2-C1K F656N CR-SPLIT=3 1 480 S PATTERN 1 1 S 1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 3 1 N/A S K1C-SUB 12446( 7) - 04-May-2011 17:02:02 - [ 7] Visit: 05 Visit Requirements: ORIENT 144D TO 154 D; BETWEEN 08-JUL-2011 AND 10-JUL-2011 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 T-PYXIDIS WFC3/UVI ACCUM UVIS2-C1K F656N CR-SPLIT=3 1 480 S PATTERN 1 1 S 1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 3 1 N/A S K1C-SUB 12446( 7) - 04-May-2011 17:02:02 - [ 8] Visit: 07 Visit Requirements: ORIENT 235D TO 260 D; BETWEEN 24-SEP-2011 AND 08-OCT-2011 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 T-PYXIDIS WFC3/UVI ACCUM UVIS2-C1K F656N CR-SPLIT=3 1 480 S PATTERN 1 1 S 1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 3 1 N/A S K1C-SUB 12446( 7) - 04-May-2011 17:02:02 - [ 9] Visit: 08 Visit Requirements: ORIENT 282D TO 317 D; BETWEEN 14-NOV-2011 AND 05-DEC-2011 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 T-PYXIDIS WFC3/UVI ACCUM UVIS2-C1K F656N CR-SPLIT=3 1 480 S PATTERN 1 1 S 1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 3 1 N/A S K1C-SUB 12446( 7) - 04-May-2011 17:02:02 - [ 10] Visit: 09 Visit Requirements: ORIENT 14D TO 41 D; BETWEEN 19-FEB-2012 AND 19-MAR-2012 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 T-PYXIDIS WFC3/UVI ACCUM UVIS2-C1K F656N CR-SPLIT=3 1 480 S PATTERN 1 1 S 1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 3 1 N/A S K1C-SUB 12446( 7) - 04-May-2011 17:02:02 - [ 11] Visit: 10 Visit Requirements: ORIENT 109D TO 124 D; BETWEEN 30-APR-2012 AND 30-MAY-2012 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 T-PYXIDIS WFC3/UVI ACCUM UVIS2-C1K F656N CR-SPLIT=3 1 480 S PATTERN 1 1 S 1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 1 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 2 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 3 none none 3 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 1 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 2 1 N/A S K1C-SUB T-PYXIDIS 1 WFC3/UVI ACCUM UVIS2-C1 F656N 4 none none 3 1 N/A S K1C-SUB 12446( 7) - 04-May-2011 17:02:02 - [ 12] Summary Form for Proposal 12446 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C1K1C-SUB ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=3 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 08-JUL-2011 AND 10-JUL-2011, BETWEEN 14-NOV-2011 AND 05-DEC-2011, BETWEEN 19-FEB-2012 AND 19-MAR-2012, BETWEEN 24-SEP-2011 AND 08-OCT-2011, BETWEEN 30-APR-2012 AND 30-MAY-2012, ORIENT 108D TO 118 D, ORIENT 109D TO 124 D, ORIENT 144D TO 154 D, ORIENT 14D TO 41 D, ORIENT 235D TO 260 D, ORIENT 282D TO 317 D, PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F656N ------------------------------------------------------------------------------------------------------------------------------------ Target Names T-PYXIDIS ------------------------------------------------------------------------------------------------------------------------------------