14036( 17) - 15-Oct-2014 19:30:58 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14036 Version: 17 Check-in Time: 15-Oct-2014 19:30:58 STScI Edit Number: 2 Title Post-equinox Uranus aurorae during a strong magnetosphere-solar wind shock interaction ------------------------------------------------------------------------------------ Type Cycle GO/DD 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Laurent Lamy Observatoire de Paris - Section de Meudon Y CoI: Dr. Renee Prange Observatoire de Paris - Section de Meudon N CoI: Dr. Chihiro Tao Laboratoire de Physique des Plasmas N CoI: Prof. John T. Clarke Boston University N CoI: Dr. Kenneth C. Hansen University of Michigan N CoI: Prof. Mathieu Barthelemy Universite de Grenoble I N CoI: Thierry Fouchet Observatoire de Paris - Section de Meudon N CoI: Dr. G. Randall Gladstone Southwest Research Institute N CoI: Dr. Nicolas Andre CNRS - Centre d'Etude Spatiale des N Rayonnements CoI: Dr. Nicholas Achilleos University College London N CoI: Dr. Patrick Guio University College London N CoI: Prof. Stanley W. Cowley University of Leicester N CoI: Dr. Sarah V. Badman Lancaster University N CoI: Dr. Henrik Melin University of Leicester N CoI: Dr. Tom Stallard University of Leicester N ------------------------------------------------------------------------------------ Abstract HST recently succeeded to re-detect Uranus aurorae with imaging and spectroscopy in 2011 (sampling solar wind shock interactions) and 2012 (sampling two planetary rotations), when the planet was near-equinox. The detected emissions (4 positive detections to date) both differ from the Uranian aurorae detected by Voyager 2 in 1986, at solstice, from those detected in a single HST image in 1998, and from other well-known planetary aurorae. Their characteristics suggested a different control of solar wind and planetary rotation on auroral processes than that known at other planets. The morphology of the aurorae seemingly evolves along the Uranian orbital revolution as a function of the topology of open/closed field lines imposed by the tilt between the magnetic axis and the solar wind flow. Uranus passed equinox 7 years ago and now gradually reaches an intermediate equinox-to-solstice configuration which deserves to be fully analyzed. The purpose of this proposal is to enlarge the set of positive detections and to sample the auroral processes and associated magnetospheric dynamics at relevant timescales (1/3 rotation to ~1 week/~10 rotations) in the present equinox-to-solstice configuration. To increase the probability of auroral brightening triggered by magnetospheric compressions, observations will again be scheduled during active solar wind conditions predicted for late Oct. 2014, with a validated methodology used for previous observations. Additional objectives include the extended study of airglow, the characterization of the extended neutral corona and the investigation of the atmospheric hydrocarbon photochemistry. ------------------------------------------------------------------------------------ Observations Description 14036( 17) - 15-Oct-2014 19:30:58 - [ 2] ------------------------ Uranus will be observed through a sequence of 7 HST orbits distributed along approximately a week sampling the arrival at Uranus of an interplanetary shock, so far predicted to reach the planet on 31 Oct. 2014. The arrival time of the interplanetary shock will be checked (and further refined) by iterative runs of robust MHD propagation codes. The proposed observations will consist of 6 STIS orbits, with TIME-TAG imaging using the clear and SRF2 filters, and 1 COS orbit, with TIME-TAG spectroscopy using the FUV G140L gratings. STIS will track the reflected solar emission, airglow and auroral emissions. COS will additionally attempts to detect atmospheric absorption or emission by hydrocarbons. We request the COS orbit to imediatly follow or preceed one STIS orbit, to help the analysis of COS spectra with STIS images. ------------------------------------------------------------------------------------ 14036( 17) - 15-Oct-2014 19:30:58 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: URANUS ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: PLANET PLANET URANUS ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=URANUS ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = 5.73 +/- 0.5 Ephemeris Center: EARTH ------------------------------------------------------------------------------------------------------------------------------------ 14036( 17) - 15-Oct-2014 19:30:58 - [ 4] Visit: 01 Visit Requirements: BETWEEN 31-OCT-2014:23:30:00 AND 01-NOV-2014:00:30:00 On Hold Comments: Additional Comments: The filters and integration times are similar to those used in proposal 13012. Visit 01 originally needs to be scheduled at t0 +/- 0.05days, where t0 = 304.3 DOY 2014. revised : Thus, I suggest to schedule visit 1 it just before the SAA passage : 308:23:31:55 309:00:23:41 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 URANUS STIS/FUV TIME-TA 25MAMA MIRROR BUFFER-TIME=200 1 1360 S POS TARG null, -3; GS -MAMA G (1360 S) ACQ SCENARIO BASE1B3; SEQ 1-2 NON-INT Comments: A POS TARG of -3arcsec in AXIS2 will move Uranus' signal away from the repeller wire shadow. ------------------------------------------------------------------------------------------------------------------------------------ 2 URANUS STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=200 1 900 S (900 POS TARG null, -3 -MAMA G S) Comments: Expand exposure time if possible. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ URANUS 1 STIS/FUV TIME-TA 25MAMA MIRROR none none none none tbd N/A -MAMA G URANUS 2 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none tbd N/A -MAMA G 14036( 17) - 15-Oct-2014 19:30:58 - [ 5] Visit: 02 Visit Requirements: BETWEEN 01-NOV-2014:23:30:00 AND 02-NOV-2014:01:00:00 On Hold Comments: Additional Comments: The filters and integration times are similar to those used in proposal 13012. Visit 02 originally needs to be scheduled at t0 + 1.94 days +/- 0.05days. revised : 305:14:19:43 305:15:11:05 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 URANUS STIS/FUV TIME-TA 25MAMA MIRROR BUFFER-TIME=200 1 1360 S POS TARG null, -3; GS -MAMA G (1360 S) ACQ SCENARIO ONEB1B3; SEQ 1-2 NON-INT Comments: A POS TARG of -3arcsec in AXIS2 will move Uranus' signal away from the repeller wire shadow. ------------------------------------------------------------------------------------------------------------------------------------ 2 URANUS STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=200 1 900 S (900 POS TARG null, -3 -MAMA G S) Comments: Expand exposure time if possible. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ URANUS 1 STIS/FUV TIME-TA 25MAMA MIRROR none none none none tbd N/A -MAMA G URANUS 2 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none tbd N/A -MAMA G 14036( 17) - 15-Oct-2014 19:30:58 - [ 6] Visit: 03 Visit Requirements: BETWEEN 02-NOV-2014:14:00:00 AND 02-NOV-2014:15:00:00 On Hold Comments: Additional Comments: The filters and integration times are similar to those used in proposal 13012. Visit 03 originally needs to be scheduled at t0 + 2.30 days +/- 0.05days. 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 URANUS STIS/FUV TIME-TA 25MAMA MIRROR BUFFER-TIME=200 1 1360 S POS TARG null, -3; GS -MAMA G (1360 S) ACQ SCENARIO BASE1B3; SEQ 1-2 NON-INT Comments: A POS TARG of -3arcsec in AXIS2 will move Uranus' signal away from the repeller wire shadow. ------------------------------------------------------------------------------------------------------------------------------------ 2 URANUS STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=200 1 900 S (900 POS TARG null, -3 -MAMA G S) Comments: Expand exposure time if possible. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ URANUS 1 STIS/FUV TIME-TA 25MAMA MIRROR none none none none tbd N/A -MAMA G URANUS 2 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none tbd N/A -MAMA G 14036( 17) - 15-Oct-2014 19:30:58 - [ 7] Visit: 04 Visit Requirements: AFTER 03 BY .5 Orbits TO 1.5 Orbits; VISIBILITY INTERVAL 51 M On Hold Comments: Additional Comments: Visit 04 originally needs to be scheduled at t0 + 2.35 days +/- 0.05days. It is important to attempt to have Visit 04 (spectroscopy) just consecutive to Visit 03 (imaging). 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 URANUS COS/NUV ACCUM BOA MIRRORA 1 1 S (1 S) GS ACQ SCENARIO BASE1B3; SEQ 1-2 NON-INT ------------------------------------------------------------------------------------------------------------------------------------ 2 URANUS COS/FUV TIME-TA PSA G140L 1105 BUFFER-TIME=2180, FP-POS=ALL, 1 439 S G EXTENDED=YES (1756 S) Comments: In the ETC calculation, we used a real STIS FUV spectrum of Uranus, for which the solar light contribution was then linearly extrapolated between 1650A and 2250A (to reach 1e-15 erg/cm2/s/A/arcsec2). Expand exposure time as much as possible. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ URANUS 1 COS/NUV ACCUM BOA MIRRORA none none none none 1 N/A URANUS 2 COS/FUV TIME-TA PSA G140L 1105 none none none 1 1 N/A G URANUS 2 COS/FUV TIME-TA PSA G140L 1105 none none none 2 1 N/A G URANUS 2 COS/FUV TIME-TA PSA G140L 1105 none none none 3 1 N/A G URANUS 2 COS/FUV TIME-TA PSA G140L 1105 none none none 4 1 N/A G 14036( 17) - 15-Oct-2014 19:30:58 - [ 8] Visit: 05 Visit Requirements: BETWEEN 05-NOV-2014:20:00:00 AND 05-NOV-2014:21:00:00 On Hold Comments: Additional Comments: The filters and integration times are similar to those used in proposal 13012. Visit originally 05 needs to be scheduled at t0 + 5.35 days +/- 0.05days. revised : 309:12:16:10 309:13:08:03 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 URANUS STIS/FUV TIME-TA 25MAMA MIRROR BUFFER-TIME=200 1 1360 S POS TARG null, -3; GS -MAMA G (1360 S) ACQ SCENARIO BASE1B3; SEQ 1-2 NON-INT Comments: A POS TARG of -3arcsec in AXIS2 will move Uranus' signal away from the repeller wire shadow. ------------------------------------------------------------------------------------------------------------------------------------ 2 URANUS STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=200 1 900 S (900 POS TARG null, -3 -MAMA G S) Comments: Expand exposure time if possible. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ URANUS 1 STIS/FUV TIME-TA 25MAMA MIRROR none none none none tbd N/A -MAMA G URANUS 2 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none tbd N/A -MAMA G 14036( 17) - 15-Oct-2014 19:30:58 - [ 9] Visit: 06 Visit Requirements: BETWEEN 22-NOV-2014:14:45:00 AND 22-NOV-2014:15:15:00 On Hold Comments: Additional Comments: The filters and integration times are similar to those used in proposal 13012. Visit 06 originally needs to be scheduled at t1 +/- 0.2 days, where t1 = 329.8 DOY 2014 (the estimate of t1 may be slightly updated during the coming week with the propagation of newly available solar wind data at Earth). 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 URANUS STIS/FUV TIME-TA 25MAMA MIRROR BUFFER-TIME=200 1 1420 S POS TARG null, -3; SEQ -MAMA G (1420 S) 1-2 NON-INT Comments: A POS TARG of -3arcsec in AXIS2 will move Uranus' signal away from the repeller wire shadow. ------------------------------------------------------------------------------------------------------------------------------------ 2 URANUS STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=200 1 900 S (900 POS TARG null, -3 -MAMA G S) Comments: Expand exposure time if possible. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ URANUS 1 STIS/FUV TIME-TA 25MAMA MIRROR none none none none tbd N/A -MAMA G URANUS 2 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none tbd N/A -MAMA G 14036( 17) - 15-Oct-2014 19:30:58 - [ 10] Visit: 07 Visit Requirements: BETWEEN 24-NOV-2014:05:00:00 AND 27-NOV-2014:06:00:00 On Hold Comments: Additional Comments: The filters and integration times are similar to those used in proposal 13012. Visit 07 originally needs to be scheduled at t1 +2.45 +/- 0.05 days. 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 URANUS STIS/FUV TIME-TA 25MAMA MIRROR BUFFER-TIME=200 1 1420 S POS TARG null, -3; SEQ -MAMA G (1420 S) 1-2 NON-INT Comments: A POS TARG of -3arcsec in AXIS2 will move Uranus' signal away from the repeller wire shadow. ------------------------------------------------------------------------------------------------------------------------------------ 2 URANUS STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=200 1 900 S (900 POS TARG null, -3 -MAMA G S) Comments: Expand exposure time if possible. ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ URANUS 1 STIS/FUV TIME-TA 25MAMA MIRROR none none none none 1 N/A -MAMA G URANUS 2 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 N/A -MAMA G 14036( 17) - 15-Oct-2014 19:30:58 - [ 11] Summary Form for Proposal 14036 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 25MAMA, BOA, F25SRF2, PSA ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=200, BUFFER-TIME=2180, EXTENDED=YES, FP-POS=ALL ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 03 BY .5 Orbits TO 1.5 Orbits, BETWEEN 01-NOV-2014:23:30:00 AND 02-NOV-2014:01:00:00, BETWEEN 02-NOV-2014:14:00:00 AND 02-NOV-2014:15:00:00, BETWEEN 05-NOV-2014:20:00:00 AND 05-NOV-2014:21:00:00, BETWEEN 22-NOV-2014:14:45:00 AND 22-NOV-2014:15:15:00, BETWEEN 24-NOV-2014:05:00:00 AND 27-NOV-2014:06:00:00, BETWEEN 31-OCT-2014:23:30:00 AND 01-NOV-2014:00:30:00, GS ACQ SCENARIO BASE1B3, GS ACQ SCENARIO ONEB1B3, POS TARG null, -3, SEQ 1-2 NON-INT, VISIBILITY INTERVAL 51 M ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, MIRROR, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names URANUS ------------------------------------------------------------------------------------------------------------------------------------