14112( 4) - 28-Jan-2016 16:22:02 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14112 Version: 4 Check-in Time: 28-Jan-2016 16:22:02 STScI Edit Number: 1 Title Monitoring the ice plumes of Europa ------------------------------------------------------------------------------------ Type Cycle GO 23 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. William B. Sparks Space Telescope Science Institute Y CoI: Dr. Kevin P. Hand Jet Propulsion Laboratory N CoI: Mr. Louis Bergeron Space Telescope Science Institute N CoI: Dr. Susana E. Deustua Space Telescope Science Institute N ------------------------------------------------------------------------------------ Abstract Crucial evidence has been found for plumes of water ice venting from the South polar region of Europa (Roth et al 2014) - spectroscopic detection of off-limb line emission from the dissociation products of water. We are engaged in a sensitive FUV HST imaging program to seek the Europa plumes and exosphere. The data reveal intriguing evidence for off-limb features, both in absorption as Europa transits the face of Jupiter, and emission, away from transit. Subsequent efforts by Roth et al to re-observe the plumes have yielded only upper limits, requiring that they are variable. The cause of the variability has not been established. Here, we propose a modest, sensitive monitoring program to continue to enhance our understanding of this important phenomenon, and to progress towards a determination of the frequency with which they appear. In transit, our strategy places firm limits on, or measurements of, absorbing columns and their distribution with altitude above the surface of Europa. Out of transit, we are sensitive to FUV emission from forward- or back-scattered sunlight and line emission. If the ice plumes of Europa arise from the deep ocean, we have gained access to probably the most astrobiologically interesting location in the Solar System. ------------------------------------------------------------------------------------ Observations Description ------------------------ We will obtain a single ACS/SBC prism observation inside and outside eclipse. We will obtain one orbit that sweeps through all filters outside eclipse and the remaining four orbits will be inside eclipse. Three use broad filters and one uses the narrow band optical filters to seek auroral emission. ------------------------------------------------------------------------------------ 14112( 4) - 28-Jan-2016 16:22:02 - [ 2] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: EUROPA-TRANSITA ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Satellite Europa ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=EUROPA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS TYPE=POS_ANGLE, RAD=6.5, ANG=224, REF=NORTH, R_RAD=-51.0, TRANSIT OF EUROPA ACROSS JUPITER FROM EARTH, R_ANG=0.0, EPOCH=2016.053:20:22:00, EpochTimeScale=UTC SEP OF EUROPA JUPITER FROM EARTH LT -5" ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 5.3 +/- 0.5 Ephemeris Center: EARTH MOSS Show Windows: true ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 TARGET NAME: EUROPA-TRANSITB ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Satellite Europa ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=EUROPA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS TYPE=POS_ANGLE, RAD=6.5, ANG=44, REF=NORTH, R_RAD=-51.0, TRANSIT OF EUROPA ACROSS JUPITER FROM EARTH, R_ANG=0.0, EPOCH=2016.064:10:51:00, EpochTimeScale=UTC SEP OF EUROPA JUPITER FROM EARTH LT -5" ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 5.3 +/- 0.5 Ephemeris Center: EARTH MOSS Show Windows: true ------------------------------------------------------------------------------------------------------------------------------------ 14112( 4) - 28-Jan-2016 16:22:02 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 3 TARGET NAME: EUROPA-NOTRANSIT-45 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Satellite Europa ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=EUROPA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS TYPE=POS_ANGLE, RAD=6.5, ANG=44, REF=NORTH, R_RAD=-51.0, OLG OF EUROPA BETWEEN 40 50 R_ANG=0.0, EPOCH=2016.070:05:12:00, EpochTimeScale=UTC ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 5.3 +/- 0.5 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 4 TARGET NAME: EUROPA-NOTRANSIT-135 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Satellite Europa ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=EUROPA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS TYPE=POS_ANGLE, RAD=6.5, ANG=44, REF=NORTH, R_RAD=-51.0, OLG OF EUROPA BETWEEN 130 140 R_ANG=0.0, EPOCH=2016.060:11:25:00, EpochTimeScale=UTC ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 5.3 +/- 0.5 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 14112( 4) - 28-Jan-2016 16:22:02 - [ 4] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 5 TARGET NAME: EUROPA-NOTRANSIT-225 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Satellite Europa ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=EUROPA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS TYPE=POS_ANGLE, RAD=6.5, ANG=44, REF=NORTH, R_RAD=-51.0, OLG OF EUROPA BETWEEN 220 230 R_ANG=0.0, EPOCH=2016.057:19:47:30, EpochTimeScale=UTC ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 5.3 +/- 0.5 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 6 TARGET NAME: EUROPA-NOTRANSIT-315 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: SATELLITE Satellite Europa ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER STD=EUROPA ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS TYPE=POS_ANGLE, RAD=6.5, ANG=44, REF=NORTH, R_RAD=-51.0, OLG OF EUROPA BETWEEN 310 320 R_ANG=0.0, EPOCH=2016.051:14:18:00, EpochTimeScale=UTC ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 5.3 +/- 0.5 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 14112( 4) - 28-Jan-2016 16:22:02 - [ 5] Visit: 01 Visit Requirements: SCHED 90%; BETWEEN 12-FEB-2016:00:00:00 AND 03-APR-2016:00:00:00 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 EUROPA-NOTR STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=99 1 2700 S ANSIT-45 -MAMA G see below (2501 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 | ------------------------------------------------------------------------------------------------------------------------------------ EUROPA-NOTRANSIT-45 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 2501.0 S -MAMA G 14112( 4) - 28-Jan-2016 16:22:02 - [ 6] Visit: 02 Visit Requirements: SCHED 90%; BETWEEN 12-FEB-2016:00:00:00 AND 03-APR-2016:00:00:00 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 EUROPA-NOTR STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=99 1 2700 S GS ACQ SCENARIO BASE1B3 ANSIT-135 -MAMA G see below (2501 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 | ------------------------------------------------------------------------------------------------------------------------------------ EUROPA-NOTRANSIT-13 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 2501.0 S 5 -MAMA G 14112( 4) - 28-Jan-2016 16:22:02 - [ 7] Visit: 03 Visit Requirements: SCHED 90%; BETWEEN 12-FEB-2016:00:00:00 AND 03-APR-2016:00:00:00 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 EUROPA-NOTR STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=99 1 2700 S ANSIT-225 -MAMA G see below (2501 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 | ------------------------------------------------------------------------------------------------------------------------------------ EUROPA-NOTRANSIT-22 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 2501.0 S 5 -MAMA G 14112( 4) - 28-Jan-2016 16:22:02 - [ 8] Visit: 04 Visit Requirements: SCHED 90%; BETWEEN 12-FEB-2016:00:00:00 AND 03-APR-2016:00:00:00 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 EUROPA-NOTR STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=99 1 2700 S ANSIT-315 -MAMA G see below (2501 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 | ------------------------------------------------------------------------------------------------------------------------------------ EUROPA-NOTRANSIT-31 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 2501.0 S 5 -MAMA G 14112( 4) - 28-Jan-2016 16:22:02 - [ 9] Visit: 05 Visit Requirements: SCHED 90%; BETWEEN 12-FEB-2016:00:00:00 AND 05-MAR-2016:20:00:00; BETWEEN 11-MAR-2016:03:00:00 AND 03-APR-2016:00:00:00 On Hold Comments: Additional Comments: Time constraints are so that Sun-Target-Observer angle is greater than 0.6 deg (latter to avoid shadow behind target) and Europa diameter is >0.95 arcsec 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 EUROPA-TRAN STIS/FUV TIME-TA F25QTZ MIRROR BUFFER-TIME=99 1 2700 S SITA -MAMA G see below (2508 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 | ------------------------------------------------------------------------------------------------------------------------------------ EUROPA-TRANSITA 1 STIS/FUV TIME-TA F25QTZ MIRROR none none none none 1 2508.0 S -MAMA G 14112( 4) - 28-Jan-2016 16:22:02 - [ 10] Visit: 06 Visit Requirements: SCHED 90%; BETWEEN 12-FEB-2016:00:00:00 AND 05-MAR-2016:20:00:00; BETWEEN 11-MAR-2016:03:00:00 AND 03-APR-2016:00:00:00 On Hold Comments: Additional Comments: Time constraints are so that Sun-Target-Observer angle is greater than 0.6 deg (latter to avoid shadow behind target) and Europa diameter is >0.95 arcsec 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 EUROPA-TRAN STIS/FUV TIME-TA F25QTZ MIRROR BUFFER-TIME=99 1 2700 S SITB -MAMA G see below (2508 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 | ------------------------------------------------------------------------------------------------------------------------------------ EUROPA-TRANSITB 1 STIS/FUV TIME-TA F25QTZ MIRROR none none none none 1 2508.0 S -MAMA G 14112( 4) - 28-Jan-2016 16:22:02 - [ 11] Summary Form for Proposal 14112 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F25QTZ, F25SRF2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=99 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 11-MAR-2016:03:00:00 AND 03-APR-2016:00:00:00, BETWEEN 12-FEB-2016:00:00:00 AND 03-APR-2016:00:00:00, BETWEEN 12-FEB-2016:00:00:00 AND 05-MAR-2016:20:00:00, GS ACQ SCENARIO BASE1B3, SCHED 90% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names EUROPA-NOTRANSIT-135, EUROPA-NOTRANSIT-225, EUROPA-NOTRANSIT-315, EUROPA-NOTRANSIT-45, EUROPA-TRANSITA, EUROPA-TRANSITB ------------------------------------------------------------------------------------------------------------------------------------