We propose STIS coronagraphic observations of four debris disks, each recently seen in scattered light for the first time in our archival reanalysis of NICMOS coronagraphy. Our targets are young (<30 Myr) solar type (G2-F3) stars; observing them will triple the number of debris disks imaged around sunlike stars at ages comparable to when terrestrial planets were forming in our solar system. STIS coronagraphy will dramatically surpass the NICMOS discovery images, with 2x better angular resolution and much improved contrast and sensitivity. These observations will allow us to measure in detail the disk geometries, determining whether parent bodies are constrained in "birth rings" analogous to the Kuiper Belt, and to search for the signatures of unseen planets gravitationally stirring the disks, potentially leading to stochastic giant collisions that might produce observable signatures in disk and dust properties. Only HST/STIS is capable of obtaining at optical wavelengths the necessary high angular resolution, subarcsecond high contrast, and image fidelity that are essential for tracing the faint extended components of these disks. We are obtaining 2 roll + 1 PSF star STIS coronagraphy for 3 targets, plus 2x(2 roll + 1 PSF star) coronagraphy for our fourth target. Observation plans follow established best practices for STIS coronagraphy, obtaining for each target a series of short exposures at the WEDGE0.6 position followed by deeper exposures at WEDGE1.0. We summarize our plans here, and provide further comments attached to the individual visits and observations. 1) Visit structure and linkages: For each target we observe pairs of science visits plus one PSF reference star visit between them (so the orbits are ordered Target-PSF-Target). These three visits are linked to execute back-to-back. For clarity, visits are numbered such that the first digit is distinct for each linked set. 2) Orientation Constraints: (2a) Edge on targets: For the three of our targets known to have approximately edge on disks, we provide *absolute* orient constraints on one visit to ensure the disk major axis is near perpendicular to the STIS occulting wedge. We use a relative orient constraint to roll the second science visit 15 to 25 degrees relative to that. Approximately 20 degrees is the desired roll between visits since it rotates by about half the angle between the diffraction spikes and the wedge occulter, thereby minimizing the field area obscured in both visits. The visit with the disk oriented perpendicular to the wedge provides somewhat better inner working angle for our disks (by 1/cos(20) ~ 7%). Since we expect thermal transients and instability may be greatest in the first orbit of each linked set (due to the unknown attitude of HST for prior observations), we choose to place the visit with the disk perpendicular to the wedge as the *third* visit in each set. We set absolute Orient Range constraints accordingly. The first visit in each set has Orient From constraints to set its orientation ~ 20 deg roll from the third visit. For the second visit between them (the PSF star), ideally we prefer to have it at the same orientation as the third visit (this is a lower priority constraint and could easily be dropped if needed to ease scheduling, but in practice with the Visit Planner this does not appear to be a significant constraint). For all 3 of these targets we found schedulable windows using these constraints. For HD 30447 and HD 35841 the available windows were very narrow (just a couple of days). By setting Schedulability=50 and slightly reducing the integration times to fit within the reduced window, we were able to widen the scheduling windows a bit. If needed we can further adjusting this trade between integration time and scheduling. For HD 141943 we have good opportunities without adjusting the Schedulability setting. (2b) Lower inclination target: For the one target known to have a lower inclination (more face on) disk, HD 191089, for more complete position angle coverage we program two duplicate sets of 3 visits, each of which follows the pattern described above. There are no timing constraints between these 2 sets of 3 visits, just the orient constraints. For this target we do not specify any absolute orient constraints, only the relative ones. For good position angle coverage, a roll of ~ 25 deg between the two visits in each pair and a roll of ~80 deg between the pairs works well. 90 deg roll between the pairs should be avoided because it results in the same regions being blocked behind the diffraction spikes in both. We have found schedulable observing opportunities for this, though it required increasing the Schedulability setting to 50 and reducing the total observing time accordingly. See further notes on Visit 40. 3) Guide Stars: We require pointing and roll control with 2-FGS guiding. Single-FGS guiding does not offer sufficient target position stability for coronagraphy. 4) Target Acquisitions: We expose TA images to achieve S/N ~ 100 using the STIS TA ETC. Because we will use the TA images to assess "behind the wedge" target positions to high precision, higher S/N than the default 40 is required. We use F25ND3 for all TA exposures. 5) Short exposures: The "short" exposure times are set to achieve 80% of full well depth on the PSF wings just outside the occulting wedge, with the target occulted behind the WEDGE0.6 position. We scale this based on empirical STIS coronagraphic PSFs obtained in the same observing mode in our past STIS programs, principally GO 12228. (Specifically we derive from visits 13, 53, 91 of GO 1228 that a 0th mag F/G star would have ~2.5e6 counts/sec/pixel immediately outside the Wedge0.6 position. We scale from that using the Tycho V mags of our targets.) Exactly how much light falls right outside of the wedge depends on the exact placement of the target relative to the wedge, which can vary by up to ~ 1/4 pixel. Based on comparing many PSFs from the GO 12228 sample we estimate up to a 10% variation in peak pixel intensity due to acquisition offsets of the same target. Variation with stellar color between F and G spectral types has < 10% effect on that peak intensity. Our target illumination level of 80% of full well (~110 e-/pixel) thus provides sufficient margin against such effects to avoid saturation. We repeat enough short exposures to fill ~ 1/3 of the target visibility interval after subtracting the time required for acquisition. The short exposures are obtained with GAIN=4 and subarray SIZEAXIS2=137. This gives a field of view 6.95" in size centered on the WEDGE0.6 position 3.47" inset along the wedge away from the field of view edge. This is the same subarray we have used previously for STIS observations at the wedge 0.6" position. Query to PC: APT is giving me warnings about 'SUBARRAY OFF OF DETECTOR' and I'm not sure how to fix those. My intent is for the subarray to be at the 'bottom edge' of the detector (i.e running over the rows AXIS2=1 to AXIS2=137.) Is there some setting I have missed that will appropriately calm these warnings? 6) Long Exposures: Following short exposures we slew HST to the WEDGE1.0 aperture position for the long exposures. The long exposure times are chosen to fill the remainder of the orbit visibility period and to be CR-SPLIT=3. The resulting exposure times are 5-10x deeper than the short exposures. The long exposures are obtained with GAIN=4 and subarray SIZEAXIS2=427. This gives a field of view 21.65" in size centered on the WEDGE1.0 position 10.82" inset along the wedge away from the field of view edge. This is the same subarray we have used previously for STIS observations at the wedge 1.0" position. 7) PSF star selection. We choose PSF stars that are close in the sky (< 5 deg if possible), at least as bright as the science target, are closely matched in optical colors (UBVRI) and/or measured effective temperature and spectral type, and for which available literature information indicates a high probability these are single stars, not close binaries. Details of the specific selection criteria for each PSF star are provided in target notes. n/a n/a DEBRIS DISKS Default false false false false false SUPPORTED STAR CIRCUMSTELLAR MATTER F3-F9 Circumstellar disk seen in NICMOS data is edge on with major axis PA= 38 deg E of N. V-I from Hipparcos catalog. Cross check: Pickles 2010 synthetic photometry color agrees within 0.06 mags. J2000 J2000 Tycho V mag= 7.909; B-V = 0.415; V-I = 0.46 STAR CIRCUMSTELLAR MATTER F3-F9 Circumstellar disk seen in NICMOS data is edge on with major axis PA= 170 deg E of N. No reliable I mag flux in literature; V-I color from Pickles 2010 spectral fits to Tycho+USNO+2MASS. J2000 J2000 Tycho V mag=8.95 ; B-V = 0.509; V-I =0.51 STAR CIRCUMSTELLAR MATTER G V-IV Circumstellar disk seen in NICMOS data is edge on with major axis PA= 145 deg E of N. No reliable I mag flux in literature; V-I color from Pickles 2010 spectral fits to Tycho+USNO+2MASS. J2000 J2000 Tycho V mag= 7.919 ; B-V = 0.706; V-I = 0.73 STAR CIRCUMSTELLAR MATTER F3-F9 Circumstellar disk seen in NICMOS data is close to face on (inclination ~ 28 deg based on ellipse fitting) with major axis PA between approx 55 to 70 deg E of N. V-I from Hipparcos catalog. V-I from Hipparcos catalog. Cross check: Pickles 2010 synthetic photometry color agrees within 0.03 mags. J2000 J2000 Tycho V mag= 7.233 ; B-V = 0.472; V-I = 0.55 STAR F0-F2 PSF star selected for HD 30447. Of stars within 5 deg of appropriate brightness, this is the closest match in Tycho and Hipparcos colors and closest match to Geneva-Copenhagen survey model fitted stellar effective temperatures. Geneva-Copenhagen survey observations show no evidence of binarity. This PSF star is 3.2 deg separation from the science target. Pay no attention to the SIMBAD listed spectral type of 'F0IV'; the above evidence places this as an ~ F2.5V. V-I from Hipparcos catalog. HD-32135 J2000 J2000 Tycho V = 7.45; B-V = 0.416; V-I = 0.45 STAR F3-F9 PSF star selected for HD 35841. Best match to Tycho B-V color within 5 degrees. Geneva-Copenhagen survey stellar effective temperature from model fits is consistent with spectral type F6, close to the F5 reported for HD 35841. Geneva-Copenhagen survey imaging and radial velocity observations show no evidence of binarity. PSF star is 2.1 deg separation from the science target. No reliable I mag flux in literature; V-I color from Pickles 2010 spectral fits to Tycho+USNO+2MASS. HD-37002 J2000 J2000 Tycho V mag=8.515 ; B-V = 0.518; V-I = 0.572 STAR F3-F9 PSF star selected for HD 141943. This is the best color match among suitably bright stars within 0.5 degrees. The effective temperature reported in Ammons et al. 2006 (5935 K) is a great match for the Geneva-Copenhagen survey reported temperature for HD 141943 (5963 K). Furthermore this is a Doppler exoplanet survey RV standard star (Crifo et al. 2010); highly stable RV provides strong evidence that this is not a binary. PSF star is 4.9 deg from science target. V-I color from Hipparcos catalog. HD-141885 J2000 J2000 Tycho V mag= 7.803; B-V = 0.708; V-I = 0.72 STAR F3-F9 PSF star selected for HD 191089. In this case there are no really great PSF star candidates very nearby to the science target, and we have to widen our search radius a bit. This star is 6.0 arcsec from the science target. It is a good match in Tycho colors and Geneva-Copenhagen Survey estimated effective temperatures. The Hipparcos V-I is a bit discrepant with the science target but (a) still within the 0.08 mag desired threshold, and (b) other evidence including the Pickles spectral model fits suggests the V-I colors may be more similar than is listed in the Hipparcos catalog. This PSF star is equal brightness to the science target. HD-196081 J2000 J2000 Tycho V mag=7.238; B-V = 0.46; V-I = 0.49 (Hipparcos), 0.51 (Pickles synthetic photom fits) STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA0.6 STIS/CCD Imaging Yes No WEDGEA1.0 Timing link suitability includes constraints ([02 After 01 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Edge-on disk major axis is at position angle ~ 38 degrees. As noted in the Proposal Description, we prefer to schedule the 2nd science visit (3rd visit in each linked set) with the disk perpendicular to the STIS wedge. For this 1st visit, we want it offset in roll angle by either + or - 20 degrees with respect to that third visit, with loose tolerance of ~ 5 deg around that nominal offset. APT reports it can schedule this visit with an Orient From of 20 +-5 relative to Visit 3, but the PC should not hesitate to change the sign to -20 +-5 if that helps scheduling. The range of allowable orients may be relaxed somewhat if necessary also. (Tic-Visit :proposal-id 13381 :visit-id "01" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:34:07.0" :trans-errors '(:WARNINGS 9 :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 44928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2855 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3192 :pcs-gap 0 ) false 1 0 Short exposure time set to 60 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.8 target. Repeated 9 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 60 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.8 target. Repeated 9 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([02 After 01 by 0.0 to 0.1 days] [03 After 02 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. PSF star for visits 1 and 3. Ideally this should be observed at similar spacecraft orientation as Visit 3, but this constraint can be relaxed if needed for schedulability. (Tic-Visit :proposal-id 13381 :visit-id "02" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:34:12.0" :trans-errors '(:WARNINGS 17 :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 57088 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2854 :al-overhead-at-end 0 :internal-dur-at-end 362 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3192 :pcs-gap 0 ) false 1 0 Short exposure time set to 40 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.45 target. Repeated 14 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position *TODO* Update with optimal exposure time for this star - this is just a placeholder value! Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([03 After 02 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Edge-on disk major axis is at position angle ~ 38 degrees. As noted in the Proposal Description, we prefer to schedule the 2nd science visit (3rd visit in each linked set) with the disk perpendicular to the STIS wedge. We want to observe with this perpendicular to the STIS occulting wedge, hence PA=38 should be parallel with the AXIS1 direction. To achieve this we add either 135 or 315 degrees to that PA. Hence the desired orientation for this visit is either ORIENT ~ 173 or ORIENT ~ 353. (No preference between those two) We specify a +- 5 deg range around the nominal orientation. If scheduling proves difficult this constraint could be relaxed slightly. (Tic-Visit :proposal-id 13381 :visit-id "03" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:39:43.0" :trans-errors '(:WARNINGS 9 :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 44928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2855 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3192 :pcs-gap 0 ) false 1 0 Short exposure time set to 60 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.8 target. Repeated 9 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 60 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.8 target. Repeated 9 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([11 After 10 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Edge-on disk major axis is at position angle ~ 170 degrees. As noted in the Proposal Description, we prefer to schedule the 2nd science visit (3rd visit in each linked set) with the disk perpendicular to the STIS wedge. For this 1st visit, we want it offset in roll angle by either + or - 20 degrees with respect to that third visit, with loose tolerance of ~ 5 deg around that nominal offset. APT reports it can schedule this visit with an Orient From of 20 +-5 relative to Visit 3, but the PC should not hesitate to change the sign to -20 +-5 if that helps scheduling. The range of allowable orients may be relaxed somewhat if necessary also. (Tic-Visit :proposal-id 13381 :visit-id "10" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:54:06.0" :trans-errors '(:WARNINGS 6 :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 37632 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2804 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3141 :pcs-gap 0 ) false 1 0 This is our faintest target. Scaling the short exposure time set to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position would require 160 s for this V=8.9 target. We choose instead to limit exposure time to 120 s and take slightly more exposures. This will provide better time separation of any PSF 'breathing' over the course of the orbit. 120 s exposure repeated x6 by CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([11 After 10 by 0.0 to 0.1 days] [12 After 11 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. PSF star for visits 10 and 12. Ideally this should be observed at similar spacecraft orientation as Visit 12, but this constraint can be relaxed if needed for schedulability. (Tic-Visit :proposal-id 13381 :visit-id "11" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:53:44.0" :trans-errors '(:WARNINGS 9 :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 37632 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "11" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2803 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3141 :pcs-gap 0 ) false 1 0 Short exposure time set to 110 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=8.5 target. Repeated 7 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([12 After 11 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Edge-on disk major axis is at position angle ~ 170 degrees. As noted in the Proposal Description, we prefer to schedule the 2nd science visit (3rd visit in each linked set) with the disk perpendicular to the STIS wedge. We want to observe with this perpendicular to the STIS occulting wedge, hence PA=170 should be parallel with the AXIS1 direction. To achieve this we add either 135 or 315 degrees to that PA. Hence the desired orientation for this visit is either ORIENT ~ 305 or ORIENT ~ 125. (No preference between those two) We specify a +- 5 deg range around the nominal orientation. If scheduling proves difficult this constraint could be relaxed slightly. (Tic-Visit :proposal-id 13381 :visit-id "12" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:53:48.0" :trans-errors '(:WARNINGS 6 :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 37632 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "12" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2804 :al-overhead-at-end 0 :internal-dur-at-end 341 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3141 :pcs-gap 0 ) false 1 0 This is our faintest target. Scaling the short exposure time set to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position would require 160 s for this V=8.9 target. We choose instead to limit exposure time to 120 s and take slightly more exposures. This will provide better time separation of any PSF 'breathing' over the course of the orbit. 120 s exposure repeated x6 by CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([21 After 20 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Edge-on disk major axis is at position angle ~ 145 degrees. As noted in the Proposal Description, we prefer to schedule the 2nd science visit (3rd visit in each linked set) with the disk perpendicular to the STIS wedge. For this 1st visit, we want it offset in roll angle by either + or - 20 degrees with respect to that third visit, with loose tolerance of ~ 5 deg around that nominal offset. APT reports it can schedule this visit with an Orient From of 20 +-5 relative to Visit 3, but the PC should not hesitate to change the sign to -20 +-5 if that helps scheduling. The range of allowable orients may be relaxed somewhat if necessary also. (Tic-Visit :proposal-id 13381 :visit-id "20" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:54:31.0" :trans-errors '(:WARNINGS 12 :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 44928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "20" :obset-id "20" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "20" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2936 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) false 1 0 Short exposure time set to 60 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.8 target. Repeated 9 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 60 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.8 target. Repeated 9 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([21 After 20 by 0.0 to 0.1 days] [22 After 21 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. PSF star for visits 20 and 22. Ideally this should be observed at similar spacecraft orientation as Visit 22, but this constraint can be relaxed if needed for schedulability. (Tic-Visit :proposal-id 13381 :visit-id "21" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:54:35.0" :trans-errors '(:WARNINGS 13 :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 47360 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "21" :obset-id "21" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "21" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2949 :al-overhead-at-end 0 :internal-dur-at-end 351 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3287 :pcs-gap 0 ) false 1 0 Short exposure time set to 54 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.7 target. Repeated 10 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 54 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.7 target. Repeated 10 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([22 After 21 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. Edge-on disk major axis is at position angle ~ 145 degrees. As noted in the Proposal Description, we prefer to schedule the 2nd science visit (3rd visit in each linked set) with the disk perpendicular to the STIS wedge. We want to observe with this perpendicular to the STIS occulting wedge, hence PA=145 should be parallel with the AXIS1 direction. To achieve this we add either 135 or 315 degrees to that PA. Hence the desired orientation for this visit is either ORIENT ~ 280 or ORIENT ~ 100. (No preference between those two) We specify a +- 5 deg range around the nominal orientation. If scheduling proves difficult this constraint could be relaxed slightly. (Tic-Visit :proposal-id 13381 :visit-id "22" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:54:40.0" :trans-errors '(:WARNINGS 12 :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 44928 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "22" :obset-id "22" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "22" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2936 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3333 :pcs-gap 0 ) false 1 0 Short exposure time set to 60 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.8 target. Repeated 9 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 60 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.8 target. Repeated 9 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([31 After 30 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. HD 191089 is a bit different from our other targets, as its disk is oriented closer to face on (~ 28 deg inclination), not edge on. We therefore do not have a single preferred orientation for the observations but instead want four orbits distributed widely in orientation. An roll of approx 25 deg works well to move the regions blocked by the wedge and diffraction spike in one pair of orbits. We repeat the second set with an additonal 80 deg roll to fill out position angle coverage. The combined four rolls will achieve almost-but-not-quite-complete position angle coverage; getting to 100% would require an additional two rolls as was used in GO 12228. Detailed calculations of the missing "gap" regions indicate that the roll offset between each visit pair should be strictly > 22.5 deg to keep the length of the gaps extending from the occulting spot smaller than the apparent size of the disk. (This is hard to explain in words but is clear with figures.) We therefore set the Orient From constraints to 22.5 - 27.5 for each pair, and 80 deg between the pairs. Note that 80 deg is preferable to 90 since it avoids overlap of the regions blocked by the diffraction spikes. (Tic-Visit :proposal-id 13381 :visit-id "30" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:57:21.0" :trans-errors '(:WARNINGS 19 :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 61952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "30" :obset-id "30" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "30" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2811 :al-overhead-at-end 0 :internal-dur-at-end 367 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3148 :pcs-gap 0 ) false 1 0 Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([31 After 30 by 0.0 to 0.1 days] [32 After 31 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13381 :visit-id "31" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:57:27.0" :trans-errors '(:WARNINGS 19 :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 61952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "31" :obset-id "31" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "31" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2811 :al-overhead-at-end 0 :internal-dur-at-end 367 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3148 :pcs-gap 0 ) false 1 0 Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position *TODO* Update with optimal exposure time for this star - this is just a placeholder value! Timing link suitability includes constraints ([32 After 31 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13381 :visit-id "32" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:56:29.0" :trans-errors '(:WARNINGS 19 :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 61952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "32" :obset-id "32" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "32" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2811 :al-overhead-at-end 0 :internal-dur-at-end 367 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3148 :pcs-gap 0 ) false 1 0 Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([41 After 40 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13381 :visit-id "40" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:16:40.0" :trans-errors '(:WARNINGS 19 :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 61952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "40" :obset-id "40" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "40" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2811 :al-overhead-at-end 0 :internal-dur-at-end 367 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3148 :pcs-gap 0 ) false 1 0 Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([41 After 40 by 0.0 to 0.1 days] [42 After 41 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13381 :visit-id "41" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:57:32.0" :trans-errors '(:WARNINGS 19 :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 61952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "41" :obset-id "41" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "41" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2811 :al-overhead-at-end 0 :internal-dur-at-end 367 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3148 :pcs-gap 0 ) false 1 0 Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position. Timing link suitability includes constraints ([42 After 41 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13381 :visit-id "42" :proposal-version -1 :trans-version "20130502" :date "26-Jun-2013 11:16:46.0" :trans-errors '(:WARNINGS 19 :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 61952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13381 :visit-id "42" :obset-id "42" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13381 :visit-id "42" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2811 :al-overhead-at-end 0 :internal-dur-at-end 367 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3148 :pcs-gap 0 ) false 1 0 Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Short exposure time set to 32 s, to achieve 80% full well (~110k e-/pixel) for the brightest part of the PSF wings just outside the Wedge0.6 position for a V=7.2 target. Repeated 16 x via CR-splits. SIZEAXIS2=137 used for the Wedge 0.6 position Long exposure time set to fill the remainder of the orbit, CR-split=3. SIZEAXIS2 = 427 is used, appropriate for the Wedge 1.0 position.