13453( 3) - 30-Jan-2014 16:00:01 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13453 Version: 3 Check-in Time: 30-Jan-2014 16:00:01 STScI Edit Number: 1 Title The Elemental Compositions of Extrasolar Minor Planets ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Michael Jura University of California - Los Angeles Y CoI: Ms. Siyi Xu University of California - Los Angeles Y CoI: Dr. Beth Klein University of California - Los Angeles N CoI: Prof. Ben M. Zuckerman University of California - Los Angeles N ------------------------------------------------------------------------------------ Abstract We propose to observe five white dwarfs known to be polluted by accretion of their own asteroids in order to investigate three related questions. (1) What determines carbon abundances within extrasolar asteroids? (2) Can we identify water-rich extrasolar planetesimals? (3) Can we find evidence for silicon-rich planetesimals, as would be expected if they are largely composed of crustal material? Data from these 5 proposed targets combined with previous COS observations either by ourselves or others of 6 additional targets, will complete an ultraviolet spectroscopic mini-survey of all known highly polluted white dwarfs with helium-dominated atmospheres within 80 pc of the Sun. This study will provide a unique legacy for understanding the formation and evolution of extrasolar rocky planets. ------------------------------------------------------------------------------------ Observations Description ------------------------ Extrapolating from our ground-based observations of Ca II 3933 A and Mg II 4481 A and scaling from optical and ultraviolet data for GD 40 and G241-6 (Klein et al. 2010, 2011, Jura et al. 2012), we expect some photospheric lines such as Si II 1265 A and O I 1152 A to be stronger than 50 mA and therefore detectable in all of our targets. If C has nearly a "solar" abundance, we also will detect photospheric C II 1336 A; the detection of Fe is uncertain. With these data, we will be able to investigate all three science questions. Paralleling the strategy described in Jura et al. (2012), we propose to obtain spectra with the G130M grating in the FUV module with a central wavelength of 1291 A. For allfive targets, we estimate the flux at 1350 A, near the wavelengths of the important C II lines, from measured GALEX FUV-band (1530 A) magnitudes and our COS spectra and/or models of stars of similar temperature such as GD 40. We then use the COS ETC 21.1 to determine the required on-target observing time to achieve a signal-to-noise ratio (SNR) of 30 in all targets except HS 2253+8023 where we propose to achieve a SNR of 20. We include the overheads for target acquisition and instrumental set-up to determine the requested number of orbits. Our targets are sufficiently faint that COS safety is not a problem. Real Time Justification ----------------------- 13453( 3) - 30-Jan-2014 16:00:01 - [ 2] Calibration Justification ------------------------- Additional Comments ------------------- Position and proper motion is from PPMXL catalog (2010). ------------------------------------------------------------------------------------ 13453( 3) - 30-Jan-2014 16:00:01 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 GD-408 STAR, DB, EXTRA-SOLAR RA=00H05M6.8510S +/- 0.2", J2000 V = 14.4 PLANET, EXTRA-SOLAR DEC=+73D13'9.38" +/- 0.2" PLANETARY SYSTEM Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.042972797685313174 0.1235 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 2 GD-303 STAR, DB, EXTRA-SOLAR RA=10H14M37.0960S +/- 0.2", J2000 V = 14.5 PLANET, EXTRA-SOLAR DEC=+56D48'32.68" +/- 0.2" PLANETARY SYSTEM Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.01022960640002957 -0.0991 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 3 WD1425+540 STAR, DB, EXTRA-SOLAR RA=14H27M36.1670S +/- 0.2", J2000 V = 15.0 PLANET, EXTRA-SOLAR DEC=+53D48'27.98" +/- 0.2" PLANETARY SYSTEM Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.03920996178880127 0.141 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 4 GD-205 STAR, DB, EXTRA-SOLAR RA=17H11M55.6580S +/- 0.2", J2000 V = 14.9 PLANET, EXTRA-SOLAR DEC=+23D01'1.55" +/- 0.2" PLANETARY SYSTEM Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 5.142757420049017E-4 -0.1707 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 5 WD2253+803 STAR, DB, EXTRA-SOLAR RA=22H54M35.7290S +/- 0.2", J2000 V = 15.6 PLANET, EXTRA-SOLAR DEC=+80D39'53.81" +/- 0.2" PLANETARY SYSTEM Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.00908301409582112 -0.017 0.0 ------------------------------------------------------------------------------------------------------------------------------------ 13453( 3) - 30-Jan-2014 16:00:01 - [ 4] Visit: 01 Visit Requirements: 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 GD-408 COS/NUV ACQ/SEA PSA MIRRORB CENTER=FLUX-WT-FLR, 1 8 S (8 S) RCH SCAN-SIZE=3 ------------------------------------------------------------------------------------------------------------------------------------ 2 GD-408 COS/NUV ACQ/IMA PSA MIRRORB 1 6 S (6 S) GE ------------------------------------------------------------------------------------------------------------------------------------ 3 GD-408 COS/FUV TIME-TA PSA G130M 1291 FP-POS=1, BUFFER-TIME=1373, 1 1352 S G FLASH=YES, SEGMENT=BOTH (1352 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 GD-408 COS/FUV TIME-TA PSA G130M 1291 FP-POS=2, BUFFER-TIME=1373, 1 1000 S G FLASH=YES, SEGMENT=BOTH (1000 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 GD-408 COS/FUV TIME-TA PSA G130M 1291 FP-POS=2, BUFFER-TIME=1373, 1 352 S G FLASH=YES, SEGMENT=BOTH see below (348 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 GD-408 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=1373, 1 1352 S G FLASH=YES, SEGMENT=BOTH see below (1348 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 GD-408 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=1373, 1 1352 S G FLASH=YES, SEGMENT=BOTH see below (1348 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 | ------------------------------------------------------------------------------------------------------------------------------------ GD-408 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A RCH GD-408 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE GD-408 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G GD-408 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G GD-408 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 348.0 S G GD-408 6 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1348.0 S G 13453( 3) - 30-Jan-2014 16:00:01 - [ 5] 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 | ------------------------------------------------------------------------------------------------------------------------------------ GD-408 7 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 1348.0 S G 13453( 3) - 30-Jan-2014 16:00:01 - [ 6] Visit: 02 Visit Requirements: 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 GD-303 COS/FUV ACQ/SEA PSA G130M 1291 CENTER=FLUX-WT-FLR, 1 2 S (2 S) RCH SCAN-SIZE=3, SEGMENT=BOTH ------------------------------------------------------------------------------------------------------------------------------------ 2 GD-303 COS/FUV ACQ/PEA PSA G130M 1291 SEGMENT=BOTH 1 1 S (1 S) KXD ------------------------------------------------------------------------------------------------------------------------------------ 3 GD-303 COS/FUV ACQ/PEA PSA G130M 1291 CENTER=FLUX-WT-FLR, 1 1 S (1 S) KD SEGMENT=BOTH, NUM-POS=5, STEP-SIZE=0.9 ------------------------------------------------------------------------------------------------------------------------------------ 4 GD-303 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=390, FLASH=YES, 1 520 S G FP-POS=ALL, SEGMENT=BOTH see below (2026 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 | ------------------------------------------------------------------------------------------------------------------------------------ GD-303 1 COS/FUV ACQ/SEA PSA G130M 1291 none none none none 1 N/A RCH GD-303 2 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A KXD GD-303 3 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A KD GD-303 4 COS/FUV TIME-TA PSA G130M 1291 none none none 1 1 506.0 S G GD-303 4 COS/FUV TIME-TA PSA G130M 1291 none none none 2 1 506.0 S G GD-303 4 COS/FUV TIME-TA PSA G130M 1291 none none none 3 1 507.0 S G GD-303 4 COS/FUV TIME-TA PSA G130M 1291 none none none 4 1 507.0 S G 13453( 3) - 30-Jan-2014 16:00:01 - [ 7] Visit: 03 Visit Requirements: 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 WD1425+540 COS/NUV ACQ/SEA PSA MIRRORB CENTER=FLUX-WT-FLR, 1 12 S (12 RCH SCAN-SIZE=3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WD1425+540 COS/NUV ACQ/IMA PSA MIRRORB 1 8 S (8 S) GE ------------------------------------------------------------------------------------------------------------------------------------ 3 WD1425+540 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1795, FLASH=YES, 1 2290 S G FP-POS=1, SEGMENT=BOTH (2290 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WD1425+540 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=987, FLASH=YES, 1 2078 S G FP-POS=2, SEGMENT=BOTH (2078 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 WD1425+540 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1795, FLASH=YES, 1 961 S (961 G FP-POS=3, SEGMENT=BOTH S) ------------------------------------------------------------------------------------------------------------------------------------ 6 WD1425+540 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=473, FLASH=YES, 1 1051 S G FP-POS=3, SEGMENT=BOTH (1051 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 WD1425+540 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1100, FLASH=YES, 1 1978 S G FP-POS=4, SEGMENT=BOTH (1978 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 | ------------------------------------------------------------------------------------------------------------------------------------ WD1425+540 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A RCH WD1425+540 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE WD1425+540 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G WD1425+540 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G WD1425+540 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G WD1425+540 6 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G WD1425+540 7 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G 13453( 3) - 30-Jan-2014 16:00:01 - [ 8] Visit: 04 Visit Requirements: 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 GD-205 COS/FUV ACQ/SEA PSA G130M 1291 CENTER=FLUX-WT-FLR, 1 1 S (1 S) RCH SCAN-SIZE=3, SEGMENT=BOTH ------------------------------------------------------------------------------------------------------------------------------------ 2 GD-205 COS/FUV ACQ/PEA PSA G130M 1291 SEGMENT=BOTH 1 1 S (1 S) KXD ------------------------------------------------------------------------------------------------------------------------------------ 3 GD-205 COS/FUV ACQ/PEA PSA G130M 1291 CENTER=FLUX-WT-FLR, NUM-POS=5, 1 1 S (1 S) KD STEP-SIZE=0.9, SEGMENT=BOTH ------------------------------------------------------------------------------------------------------------------------------------ 4 GD-205 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=885, FLASH=YES, 1 425 S G FP-POS=ALL, SEGMENT=BOTH see below (1728 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 | ------------------------------------------------------------------------------------------------------------------------------------ GD-205 1 COS/FUV ACQ/SEA PSA G130M 1291 none none none none 1 N/A RCH GD-205 2 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A KXD GD-205 3 COS/FUV ACQ/PEA PSA G130M 1291 none none none none 1 N/A KD GD-205 4 COS/FUV TIME-TA PSA G130M 1291 none none none 1 1 432.0 S G GD-205 4 COS/FUV TIME-TA PSA G130M 1291 none none none 2 1 432.0 S G GD-205 4 COS/FUV TIME-TA PSA G130M 1291 none none none 3 1 432.0 S G GD-205 4 COS/FUV TIME-TA PSA G130M 1291 none none none 4 1 432.0 S G 13453( 3) - 30-Jan-2014 16:00:01 - [ 9] Visit: 05 Visit Requirements: 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 WD2253+803 COS/NUV ACQ/SEA PSA MIRRORB CENTER=FLUX-WT-FLR, 1 84 S (84 RCH SCAN-SIZE=3 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WD2253+803 COS/NUV ACQ/IMA PSA MIRRORB 1 29 S (29 GE S) ------------------------------------------------------------------------------------------------------------------------------------ 3 WD2253+803 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=3451, FLASH=YES, 1 1809 S G SEGMENT=BOTH, FP-POS=1 (1809 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WD2253+803 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=1810, FLASH=YES, 1 1916 S G SEGMENT=BOTH, FP-POS=1 (1916 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 WD2253+803 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=3451, FLASH=YES, 1 1332 S G SEGMENT=BOTH, FP-POS=2 (1332 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 WD2253+803 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=2287, FLASH=YES, 1 2393 S G SEGMENT=BOTH, FP-POS=2 (2393 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 WD2253+803 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=3451, FLASH=YES, 1 855 S (855 G SEGMENT=BOTH, FP-POS=3 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 WD2253+803 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=2765, FLASH=YES, 1 2870 S G SEGMENT=BOTH, FP-POS=3 (2870 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 WD2253+803 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=3451, FLASH=YES, 1 378 S (378 G SEGMENT=BOTH, FP-POS=4 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 WD2253+803 COS/FUV TIME-TA PSA G130M 1291 BUFFER-TIME=3451, FLASH=YES, 1 3353 S G SEGMENT=BOTH, FP-POS=4 (3353 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 | ------------------------------------------------------------------------------------------------------------------------------------ WD2253+803 1 COS/NUV ACQ/SEA PSA MIRRORB none none none none 1 N/A RCH WD2253+803 2 COS/NUV ACQ/IMA PSA MIRRORB none none none none 1 N/A GE WD2253+803 3 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G 13453( 3) - 30-Jan-2014 16:00:01 - [ 10] 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 | ------------------------------------------------------------------------------------------------------------------------------------ WD2253+803 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G WD2253+803 5 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G WD2253+803 6 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G WD2253+803 7 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G WD2253+803 8 COS/FUV TIME-TA PSA G130M 1291 none none none none 4 N/A G WD2253+803 9 COS/FUV TIME-TA PSA G130M 1291 none none none none 4 N/A G WD2253+803 10 COS/FUV TIME-TA PSA G130M 1291 none none none none 5 N/A G 13453( 3) - 30-Jan-2014 16:00:01 - [ 11] Summary Form for Proposal 13453 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ/IMAGE, ACQ/PEAKD, ACQ/PEAKXD, ACQ/SEARCH, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1100, BUFFER-TIME=1373, BUFFER-TIME=1795, BUFFER-TIME=1810, BUFFER-TIME=2287, BUFFER-TIME=2765, BUFFER-TIME=3451, BUFFER-TIME=390, BUFFER-TIME=473, BUFFER-TIME=885, BUFFER-TIME=987, CENTER=FLUX-WT-FLR, FLASH=YES, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, FP-POS=ALL, NUM-POS=5, SCAN-SIZE=3, SEGMENT=BOTH, STEP-SIZE=0.9 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G130M, MIRRORB ------------------------------------------------------------------------------------------------------------------------------------ Target Names GD-205, GD-303, GD-408, WD1425+540, WD2253+803 ------------------------------------------------------------------------------------------------------------------------------------