14670( 4) - 28-Jul-2016 20:02:13 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14670 Version: 4 Check-in Time: 28-Jul-2016 20:02:13 STScI Edit Number: 1 Title Exploring a highly perturbed debris disk associated with an exiled exoplanet ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Paul George Kalas University of California - Berkeley Y CoI: Dr. James R. Graham University of California - Berkeley N CoI: Prof. Jennifer Patience Arizona State University N CoI: Prof. Stanimir A. Metchev The University of Western Ontario N CoI: Dr. Christine Chen Space Telescope Science Institute N CoI: Dr. Ruobing Dong University of California - Berkeley N CoI: Mr. Abhijith Rajan Arizona State University N CoI: Dr. Gaspard Duchene University of California - Berkeley N CoI: Dr. Marshall Perrin Space Telescope Science Institute N CoI: Dr. Ruth A. Murray-Clay University of California - Santa Barbara N CoI: Dr. Bruce A. Macintosh Stanford University N CoI: Dr. Brenda Matthews National Research Council of Canada N CoI: Dr. Vanessa Bailey Stanford University N CoI: Dr. Robert John De Rosa University of California - Berkeley N ------------------------------------------------------------------------------------ Abstract We have resolved the debris disk surrounding the 13 Myr-old, F5V star HD 106906 using the Gemini Planet Imager (GPI) and archival coronagraphic data from the ACS/HRC. The GPI H-band images reveal a nearly edge-on torus of dust-scattered light with an evacuated region ~50 AU in radius and a roughly symmetric morphology to ~100 AU (limited by the field of view). The optical ACS/HRC data show a highly asymmetric disk structure from ~250 AU radius (the inner working angle of the data), to ~500 AU radius (a sensitivity limited value). HD 106906 also has an 11 Jupiter mass companion at 650 AU projected separation, and we find that it is misaligned with the debris disk by 21 degrees. The planet may have been dynamically ejected from the system, perturbing the debris disk. We explored the possibility that it has circumplanetary material, finding tentative evidence that HST's optical PSF is extended for HD 106906b compared to 11 other reference stars in the field. However, the HST data are limited such that we cannot confirm the extended PSF structure, and we have no information about the debris disk in the 100-250 AU region where it transitions from a symmetric to an asymmetric morphology, possibly revealing the planet's periastron distance. Here we propose timely STIS coronagraphic observations designed to critically test our finding of extended PSF structure for the exoplanet, and to image the disk structure between 100 and 250 AU radius. These data will have a significant, multi-disciplinary scientific impact on understanding the dynamical co-evolution of planets and debris disks and the nature of circumplanetary material. ------------------------------------------------------------------------------------ Observations Description ------------------------ (1) To mitigate the effects of uncorrected geometric distortion, we aim to place HD 106906b in the central region of the STIS field. This is achieved by 14670( 4) - 28-Jul-2016 20:02:13 - [ 2] occulting the star at the WEDGEB1.8 position and using the specified ORIENTs. (2) HD 106906 is a bright star (mv = 7.8 mag) and its PSF halo interferes with the detection of its debris disk as well as the planet located at 7.1'' radius from the star. To achieve PSF subtraction we will image the science target at three roll angles (3 orbits) and image a PSF reference star (1 orbit). For the ACS/HRC data, the PSF reference star was HD 103746. This provided an excellent PSF subtraction as it is spectrally matched to HD 106906. (3) The debris disk is vertically thick, particularly on the east side. The PSF reference star (HD 103746) will be used to achieve high fidelity PSF subtraction to accurately map the vertical morphology of the disk. (4) A key difference between the ACS/HRC PSF and STIS PSF is that the latter is not as well sampled (25 mas/pix vs. 51 mas/pix, respectively) and has diffraction spikes. By rolling the telescope to three different ORIENTs, the diffraction spikes and other effects of the instrumental diffraction and scattering pattern will rotate through the intrinsic astrophysical signal surrounding the planet. In the long exposure sequences we image at the WEDGEB1.8 position, and also at a POS-TARG X=-0.5" away from this position, thus achieving additional dithering for PSF analysis. (5) To obtain a few images at a smaller inner angle, each orbit finishes with a sequence of shorter integrations at POS-TARG X=-17". Here the WEDGE B width is approximately 0.6". (6) The best PSF subtractions occur when the PSF star is imaged in an adjacent orbit with the science target star. Therefore, in Visit 01 we specify a timing SEQUENCE of four orbits in the following order: science -> psf -> science -> science. Therefore orbit 2 which is the PSF reference star observation has orbits 1 and 3 adjacent to it. The SEQUENCE should have consecutive orbits and not be interrupted by other types of observations. (7) The PSF reference star has a field star at PA = 184 degrees that would interfere with the observations of the science target. ORIENT constraints are specified for the PSF reference star to solve this problem. The program appears to be schedulable given all the orient and sequence constraints. ------------------------------------------------------------------------------------ 14670( 4) - 28-Jul-2016 20:02:13 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD-106906 STAR, DISK, EXTRA-SOLAR RA=12H17M53.1923S +/- 0.1", J2000 V = 7.81 PLANET, EXTRA-SOLAR DEC=-55D58'31.89" +/- 0.1" PLANETARY SYSTEM, F3-F9 Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database.This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.0046215957508088466 -0.01221 0.01086 ------------------------------------------------------------------------------------------------------------------------------------ 2 HR-4570 STAR, F3-F9 RA=11H56M43.9152S +/- 0.1", J2000 V = 6.267 DEC=-47D04'20.56" +/- 0.1" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.012424495206262834 0.023989999999999997 0.02062 ------------------------------------------------------------------------------------------------------------------------------------ 14670( 4) - 28-Jul-2016 20:02:13 - [ 4] Visit: 01 Visit Requirements: ORIENT 320.0D TO 320.1 D; SEQ 01, 02, 03, 04 WITHIN 4 Orbits 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD-106906 STIS/CCD ACQ F25ND3 MIRROR 1 1.0 S (1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 1050 S (1050 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 1050 S POS TARG -0.5, 0 (1050 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 180 S (180 POS TARG -17, 0 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-106906 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 14670( 4) - 28-Jul-2016 20:02:13 - [ 5] Visit: 02 (PSF reference) Visit Requirements: ORIENT 270D TO 359.9 D; ORIENT 0D TO 180 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HR-4570 STIS/CCD ACQ F25ND3 MIRROR 1 0.2 S (0.2 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HR-4570 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=8, GAIN=4 1 800 S (800 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HR-4570 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=8, GAIN=4 1 800 S (800 POS TARG -0.5, 0.0 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HR-4570 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=5, GAIN=4 1 60 S (60 POS TARG -17, 0 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HR-4570 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A HR-4570 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HR-4570 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HR-4570 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 HR-4570 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 4 1 N/A 8 HR-4570 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 5 1 N/A 8 HR-4570 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 6 1 N/A 8 HR-4570 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 7 1 N/A 8 HR-4570 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 8 1 N/A 8 HR-4570 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HR-4570 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HR-4570 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 14670( 4) - 28-Jul-2016 20:02:13 - [ 6] 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 | ------------------------------------------------------------------------------------------------------------------------------------ HR-4570 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 4 1 N/A 8 HR-4570 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 5 1 N/A 8 HR-4570 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 6 1 N/A 8 HR-4570 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 7 1 N/A 8 HR-4570 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 8 1 N/A 8 HR-4570 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HR-4570 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HR-4570 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 HR-4570 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 4 1 N/A 8 HR-4570 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 5 1 N/A 8 14670( 4) - 28-Jul-2016 20:02:13 - [ 7] Visit: 03 Visit Requirements: ORIENT 335.0D TO 335.1 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD-106906 STIS/CCD ACQ F25ND3 MIRROR 1 1.0 S (1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 1050 S (1050 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 1050 S POS TARG -0.5, 0 (1050 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 180 S (180 POS TARG -17, 0 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-106906 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 14670( 4) - 28-Jul-2016 20:02:13 - [ 8] Visit: 04 Visit Requirements: ORIENT 350.0D TO 350.1 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD-106906 STIS/CCD ACQ F25ND3 MIRROR 1 1.0 S (1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 1050 S (1050 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 1050 S POS TARG -0.5, 0 (1050 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 HD-106906 STIS/CCD ACCUM WEDGEB1.8 MIRROR CR-SPLIT=3, GAIN=4 1 180 S (180 POS TARG -17, 0 S) ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-106906 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 2 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 3 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 1 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 2 1 N/A 8 HD-106906 4 STIS/CCD ACCUM WEDGEB1. MIRROR none none none 3 1 N/A 8 14670( 4) - 28-Jul-2016 20:02:13 - [ 9] Summary Form for Proposal 14670 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F25ND3, WEDGEB1.8 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=3, CR-SPLIT=5, CR-SPLIT=8, GAIN=4 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 0D TO 180 D, ORIENT 270D TO 359.9 D, ORIENT 320.0D TO 320.1 D, ORIENT 335.0D TO 335.1 D, ORIENT 350.0D TO 350.1 D, POS TARG -0.5, 0, POS TARG -0.5, 0.0, POS TARG -17, 0, SEQ 01, 02, 03, 04 WITHIN 4 Orbits ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD-106906, HR-4570 ------------------------------------------------------------------------------------------------------------------------------------