Mixtures of water ice and organics seem to pervade surfaces in the outer Solar System, from the rings of Saturn to the Kuiper Belt Objects. The early Earth was bombarded by the leftover planetesimals from the formation of the planets, and these must have been rich in both ice and carbon to provide the building blocks of life. Scattered light from debris disks is remarkably similar in albedo (total scattering efficiency) and color (red) to the objects in the outer solar system. Thus, we have a hint that the same photochemical processes that happened close to home also happen around other stars. We propose to study the color of two debris disks in some detail. Scattering of light is the only window available to us to see the composition of debris disks in a spatially resolved manner and to assess their potential for containing planets like ours.

Coronagraphic imaging in multiple filters along with non-coronagraphic direct imaging for photometry. Visits are linked so that the disk is observed at one orientation, then the PSF is observed, and then the disk is observed at a second orientation 30 deg from the first one. 14 Sep 2006 - Resubmission of Phase II file. The only changes were in the NSAMP value in the SCAMRR observations for non-coronagraphic photometry. I increased NSAMP to provide more precise photometry. ISM AND CIRCUMSTELLAR MATTER 12 false 0.0 false false false false false false SUPPORTED STAR A0-A3 V-IV DISK CIRCUMSTELLAR MATTER Coordinates from Hipparcos catalog J=7.69, H=7.62, Ks=7.59 J2000 05 02 27.4000 +07 27 39.70 J2000 STAR A0-A3 V-IV Coordinates from Hipparcos Catalog J=6.99, H=6.94, Ks=6.89 J2000 04 56 43.8000 +08 49 20.66 J2000 STAR CIRCUMSTELLAR MATTER DISK F3-F9 Coordinates from Hipparcos Catalog J=6.2, H=5.98, Ks=5.91 J2000 19 22 58.9000 -54 32 17.00 J2000 STAR F3-F9 Coordinates from Hipparcos Catalog J=5.45, H=5.29, Ks=5.17 J2000 09 30 34.6000 -55 06 36.20 J2000 NIC2 Imaging Yes No F171M NIC2 Imaging Yes No F180M NIC2 Imaging Yes No F204M NIC2 Imaging Yes No F222M NIC2 Imaging Yes No F171M NIC2 Imaging Yes No F180M NIC2 Imaging Yes No F204M NIC2 Imaging Yes No F222M NIC2 Imaging Yes No F160W NIC2 Imaging Yes No F205W NIC2 Imaging Yes No F160W NIC2 Imaging Yes No F205W 1st orientation of HD 32297 Sequence with visits 2 (PSF) and 3 (2nd orientation) in consecutive orbits (given as a sequence within 2.7 orbits) Orientation constraint on this visit puts disk between diffraction spikes: PA(disk)=236.5 so ORIENT = 224.5+236.5=100 deg (this puts disk along +y). Go +/- 15 deg of this, and we don't care if actual orientation is along +/-y or +/-x. On-line calendar says the available ORIENTS for the 52 min visibility are approx. 250-330. So, our ideal orients are 265 and 295. For flexibility in scheduling, specify 262-268. deg here and 292-298 deg on Visit 3. (Tic-Visit :proposal-id 10857 :visit-id "01" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:30:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 165632 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "01" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2775 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) true 1 0 Expect 76Ke- in brightest pixel in 0.313 s integration time = 224 s (212 s needed) integration time = 160 s total time = 224 + 224+ 160 = 608 s integration time = 480 s times 3 iterations = 1440 s minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/N=602 (46,900 e- in brightest pixel) at F222M POS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position pos-targ (1.25, -2.16) to position for 3rd dither HD 31489 (PSF for HD 32297) No orientation constraint Scheduling sequence set on Visit 1. (Tic-Visit :proposal-id 10857 :visit-id "02" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:35:24.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 156800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "02" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2776 :al-overhead-at-end 0 :internal-dur-at-end 104 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) true 1 0 expect 74.6Ke- in brightest pixel in 0.5 s integration time = 224 s (212 s needed) integration time = 160 s total time = 224 + 224+ 160 = 608 s integration time = 480 s times 3 iterations = 1440 s minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/N=602 (46,900 e- in brightest pixel) at F222M POS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position pos-targ (1.25, -2.16) to position for 3rd dither 2nd orientation of HD 32297 (Tic-Visit :proposal-id 10857 :visit-id "03" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:31:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 165632 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "03" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2775 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) true 1 0 Expect 76Ke- in brightest pixel integration time = 224 s (212 s needed) integration time = 160 s total time = 224 + 224+ 160 = 608 s integration time = 480 s times 3 iterations = 1440 s minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/N=602 (46,900 e- in brightest pixel) at F222M POS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position pos-targ (1.25, -2.16) to position for 3rd dither HD 181327 1st orientation, first three filters sequence with visits 5 (PSF) and 6 (2nd orientation in these filters) in consecutive orbits (specified as sequence within 2.7 orbits) No absolute orient constraint (Tic-Visit :proposal-id 10857 :visit-id "04" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:40:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 174464 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "04" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2831 :al-overhead-at-end 0 :internal-dur-at-end 131 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3200 :pcs-gap 0 ) true 1 0 Expect 76.7Ke- in 0.249 s minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position HD 183028 (PSF for HD 181327), first three filters Seqeunce specified on Visit 4 (Tic-Visit :proposal-id 10857 :visit-id "05" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:42:16.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 188816 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "05" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2862 :al-overhead-at-end 0 :internal-dur-at-end 147 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) true 1 0 Expect 75.6Ke- in 0.586 s minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position HD 181327 2nd orientation (30 deg from visit 4), first three filters sequence constraint specified on visit 4. Orientation constraint is 30 deg from visit 4 (Tic-Visit :proposal-id 10857 :visit-id "06" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:43:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 174464 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "06" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2831 :al-overhead-at-end 0 :internal-dur-at-end 131 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3200 :pcs-gap 0 ) true 1 0 minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position HD 181327 1st orientation at F222M sequence with visits 15 (PSF) and 16 (2nd orientation at F222) in consecutive orbits (specified as sequence within 2.7 orbits) I also specified an "ORIENT FROM" requirement relative to Visit 4 (the first orientation on HD 181327 in the other filters). The purpose of this is to keep the approximately the same portions of the disk free from diffraction spike contamination to permit the best possible disk color measurement free from systematics. Let me know if this poses a scheduling problem. I'd actually like the orientations of 4 and 14, and 6 and 16 to be as close as possible, but I hestitated to put a very restrictive orientation requirement. (Tic-Visit :proposal-id 10857 :visit-id "14" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:50:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 156800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "14" :obset-id "14" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "14" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2843 :al-overhead-at-end 0 :internal-dur-at-end 109 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3200 :pcs-gap 0 ) true 1 0 POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position HD 183028 (PSF for HD 181327) at F222M (Tic-Visit :proposal-id 10857 :visit-id "15" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:49:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 156800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "15" :obset-id "15" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "15" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2843 :al-overhead-at-end 0 :internal-dur-at-end 109 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3200 :pcs-gap 0 ) true 1 0 POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position HD 181327 2nd orientation at F222M (Tic-Visit :proposal-id 10857 :visit-id "16" :proposal-version -1 :trans-version "20060322" :date "13-Sep-2006 17:50:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "23" :si-bright-earth-limb-angle 20.0 :data-volume 156800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10857 :visit-id "16" :obset-id "16" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10857 :visit-id "16" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2843 :al-overhead-at-end 0 :internal-dur-at-end 109 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3200 :pcs-gap 0 ) true 1 0 POS-TARG (-0."91, -3."42) to get to approx. pixel (63,166) for 2nd dither position minimum integration time of 0.203 s gives S/NPOS-TARG (-2.16,-1.25) to get to approx. pixel (47,195) for 1st dither position