0 Assigned ID: 63 ----- Attempting Submission 1 (Sun Apr 03 00:16:59 GMT 2016) ----- HST Phase I Proposal 63 (hd106906_cy24.apt) successfully submitted. Receipt: # 63-1 ----- Attempting Submission 2 (Fri Apr 08 06:25:11 GMT 2016) ----- HST Phase I Proposal 63 (hd106906_cy24.apt) successfully submitted. Receipt: # 63-2 ----- Attempting Submission 3 (Fri Apr 08 20:06:32 GMT 2016) ----- Visit 1467002 in a #<SEQ Observation-Blocks (01 02) WITHIN 09m32.000s> set which requires 5715.4 S Visit 1467002 requires 5143.0 seconds but separated by less than 572.0 seconds from Visit 1467003 Visit 1467002 requires 5143.0 seconds but separated by less than 572.0 seconds from Visit 1467004 Visit 1467002 in a #<SEQ Observation-Blocks (02 04) WITHIN 09m32.000s> set which requires 5715.4 S Visit 1467003 requires 5143.0 seconds but separated by less than 572.0 seconds from Visit 1467004 Visit 1467003 in a #<SEQ Observation-Blocks (02 03) WITHIN 09m32.000s> set which requires 5715.4 S Visit 1467004 in a #<SEQ Observation-Blocks (02 04) WITHIN 09m32.000s> set which requires 5715.4 S 0 ----- Attempting Submission 1 (Thu Jul 21 10:14:03 GMT 2016) ----- HST Phase II Proposal 14670 (14670.apt) successfully submitted. Receipt: # 14670-1 ----- Attempting Submission 2 (Thu Jul 21 15:46:55 GMT 2016) ----- I put the SEQUENCE in a shorter period because we want to obtain consecutive orbits without interruptions by other types of observations. Exploring a highly perturbed debris disk associated with an exiled exoplanet 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. (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 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. Extrasolar Planets and Planet Formation 12 false false false false false false SUPPORTED STAR DISK EXTRA-SOLAR PLANET EXTRA-SOLAR PLANETARY SYSTEM F3-F9 NO 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. J2000 J2000 STAR F3-F9 NO This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 STIS/CCD Imaging Yes No WEDGEB1.8 STIS/CCD Imaging Yes No WEDGEB1.8 STIS/CCD Imaging Yes No WEDGEB1.8 STIS/CCD Imaging Yes No WEDGEB1.8 /private/var/folders/8k/sxlgy5ts2xdbykzf_vw6jrfw0001c5/T/OPVisit3324950158383428451.xml Timing link suitability includes constraints ([Sequence (01 02 03 04) within 0.3 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 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(Tic-Visit :proposal-id 14670 :visit-id "02" :proposal-version -1 :trans-version "20160601" :date "28-Jul-2016 16:00:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 386896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14670 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14670 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3016 :al-overhead-at-end 0 :internal-dur-at-end 419 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3352 :pcs-gap 0 ) true 1 0 /private/var/folders/8k/sxlgy5ts2xdbykzf_vw6jrfw0001c5/T/OPVisit4868308072252147803.xml Timing link suitability includes constraints ([Sequence (01 02 03 04) within 0.3 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14670 :visit-id "03" :proposal-version -1 :trans-version "20160601" :date "28-Jul-2016 16:00:44.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 166048 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14670 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14670 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3112 :al-overhead-at-end 0 :internal-dur-at-end 379 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3456 :pcs-gap 0 ) true 1 0 /private/var/folders/8k/sxlgy5ts2xdbykzf_vw6jrfw0001c5/T/OPVisit8046870790605559054.xml Timing link suitability includes constraints ([Sequence (01 02 03 04) within 0.3 days]) The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14670 :visit-id "04" :proposal-version -1 :trans-version "20160601" :date "28-Jul-2016 16:00:46.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 166048 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14670 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14670 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3112 :al-overhead-at-end 0 :internal-dur-at-end 379 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3456 :pcs-gap 0 ) true 1 0