10560( 6) - 02/10/06 10:46 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 10560 Version: 6 Check-in Time: 10-Feb-2006 15:46:10 Title Confirming Planetary Candidates in the Stellar Graveyard with NICMOS ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 14 ------------------------------------------------------------------------------------ Investigators Contact? PI: Mr. John Henry Debes The Pennsylvania State University CoI: Dr. Steinn Sigurdsson The Pennsylvania State University N ------------------------------------------------------------------------------------ Abstract We propose to follow up planetary candidates imaged near the white dwarf WD 1620-391 with second epoch images from NICMOS. This white dwarf was imaged during Cycle 12 as part of a campaign to detect massive planetary companions to nearby white dwarfs with photospheric metal line absorption. While at a low galactic latitude, a puzzling excess of objects are present < 4", suggesting the possiblity of objects physically associated with the white dwarf. With second epoch information we can test these candidates for common proper motion, a test for physical association. If any of these candidates are confirmed, they will be consistent with 6-10 M$_{Jup}$ companions at projected orbital separations of between 25-50 AU. ------------------------------------------------------------------------------------ Observations Description ------------------------ In 2 Gyro mode, two orbits will be used to observe WD 1620-391. This target will be observed behind the NIC2 coronagraphic spot at one orientation in the first orbit, and then in the very next orbit will be observed at a different spacecraft roll, preferably at a difference of ~10-30 degrees. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10560( 6) - 02/10/06 10:46 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 WD-1620-391 STAR, DA RA=16H23M33.7500S +/- 0.1", J2000 V = 11.16+/-0.37 DEC=-39D13'46.00" +/- 0.1", H=11.708 PLATE-ID=061B Coordinate Source: GSC_SURVEY_PLATE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 1987.385 0.0050 0.0 0.068 10560( 6) - 02/10/06 10:46 - [ 3] Visit: 01 Visit Priority: Visit Requirements: ORIENT 120.0D TO 340.0 D; ORIENT 20.0D TO 60.0 D On Hold Comments: Additional Comments: First coronagraphic observations, with acquisition and direct observing behind the spot. To be used if 2 Gyro mode is active. Orientation restrictions are in place to ensure that two candidate planetary companions with separations of ~3.6 and 3.9 arcseconds at pointing angles (East of North) of 27 degrees and 279 degrees are still in the FOV. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 WD-1620-391 NIC2 ACQ NIC2-ACQ F160W 1 6.5 S GS ACQ SCENARIO BASE1TNS ------------------------------------------------------------------------------------------------------------------------------------ 2 WD-1620-391 NIC2 MULTIAC NIC2-CORO F160W NSAMP=12,SAMP-SEQ=STEP256 4 DEF CUM N ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WD-1620-391 1 NIC2 ACQ NIC2-ACQ F160W none none none none 1 N/A WD-1620-391 2 NIC2 MULTIAC NIC2-COR F160W none none 1 none 1 N/A CUM ON WD-1620-391 2 NIC2 MULTIAC NIC2-COR F160W none none 2 none 1 N/A CUM ON WD-1620-391 2 NIC2 MULTIAC NIC2-COR F160W none none 3 none 1 N/A CUM ON WD-1620-391 2 NIC2 MULTIAC NIC2-COR F160W none none 4 none 1 N/A CUM ON 10560( 6) - 02/10/06 10:46 - [ 4] Visit: 02 Visit Priority: Visit Requirements: ORIENT 10.0D TO 30.0D FROM 01; AFTER 01 BY 0.8 Orbits TO 1.2 Orbits On Hold Comments: Additional Comments: This visit follows visit 1 with a spacecraft orientation change of between 10 and 30 degrees Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 WD-1620-391 NIC2 ACQ NIC2-ACQ F160W 1 6.5 S GS ACQ SCENARIO BASE1TNS ------------------------------------------------------------------------------------------------------------------------------------ 2 WD-1620-391 NIC2 MULTIAC NIC2-CORO F160W NSAMP=12,SAMP-SEQ=STEP256 4 DEF CUM N ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ WD-1620-391 1 NIC2 ACQ NIC2-ACQ F160W none none none none 1 N/A WD-1620-391 2 NIC2 MULTIAC NIC2-COR F160W none none 1 none 1 N/A CUM ON WD-1620-391 2 NIC2 MULTIAC NIC2-COR F160W none none 2 none 1 N/A CUM ON WD-1620-391 2 NIC2 MULTIAC NIC2-COR F160W none none 3 none 1 N/A CUM ON WD-1620-391 2 NIC2 MULTIAC NIC2-COR F160W none none 4 none 1 N/A CUM ON 10560( 6) - 02/10/06 10:46 - [ 5] Summary Form for Proposal 10560 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures NIC2-ACQ NIC2-CORON ------------------------------------------------------------------------------------------------------------------------------------ Configurations NIC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters NSAMP=12 SAMP-SEQ=STEP256 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 120.0D TO 340.0 D; ORIENT 20.0D TO 60.0 D; GS ACQ SCENARIO BASE1TNS; ORIENT 10.0D TO 30.0D FROM 01; AFTER 01 BY 0.8 Orbits TO 1.2 Orbits; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W ------------------------------------------------------------------------------------------------------------------------------------ Target Names WD-1620-391 ------------------------------------------------------------------------------------------------------------------------------------