Science Keywords: Select from 2 to 5 items. Science Keywords is a required field. Please specify your scheduling constraints or 'No Constraints' on all Observation forms. 0 Assigned ID: 1120 ----- Attempting Submission 1 (Wed Aug 19 13:41:03 GMT 2020) ----- Joint Chandra/HST The observation submitted here requires simultaneity with the Chandra X-ray Observatory. The position angle and radius submitted here, have been chosen arbitrarily. The actual date-time of the observation will depend on schedulability between HST and the Chandra X-ray Observatory. Once this is determined, updated position angles and radii will be provided in a very timely manner, but some parameters may need updating due to a changing field of view. We thank Weston Eck for his support and patience through the Phase II Proposal. 1867021982 ----- Attempting Submission 1 (Thu Sep 17 09:45:09 GMT 2020) ----- Over the last 3 decades, X-ray(<60A) and UV(>700A) observations by Chandra and the Hubble Space Telescope (HST) have continuously revolutionised our understanding of Jupiter, but the planet has never been spatially resolved at wavelengths between the X-ray and UV. We propose to leverage and develop recent pioneering observing techniques with Chandra[Drake et al. 2019] to conduct the first spatially resolved EUV(60-170A) observations of Jupiter. This will open an entirely new window of exploration for Jupiter, revealing key information on the processes dominating rapidly-rotating bodies and gas giant planets. To do this, we request a 36ks observation of Jupiter with the Chandra HRC-S thin filter, a 6ks observation with the thick filter, and a simultaneous HST orbit to constrain the UV flux. This observing time, won through the Chandra X-ray Observatory AO, seeks to leverage a new Chandra capability to take the first EUV (60-170 angstrom) image of a planet: Jupiter. To do this, a simultaneous HST observation of Jupiter's Northern Aurora is critical, in order to provide a constraint on the highly time variable UV flux at this time. Without this, the Chandra observation will be impossible to interpret, since it will be unclear the extent to which the detected emission is the never-before-seen EUV emission or contaminant UV emission. The time constraint on the observation is therefore simultaneity with Chandra. We also request that the HST orbit takes place during an interval when the Northern aurora is in view (observable for half a Jupiter rotation so ~5 in every 10 hours). Jupiter's northern hemisphere is best observed when the CML of Jupiter from Earth is between 120 and 220 (S3) deg. If it is not possible to observe the North during such a window, then for the southern hemisphere a CML between 290 and 120 deg would enable observations of the Southern aurora. However, we note that Jupiter's Southern aurora is tilted to limit visibility from Earth, while the North is tilted to favour it. Observations of Jupiter's auroras will be obtained using the STIS/FUV-MAMA instrument using the F25SRF2 filter, in order to observe the H2 Lyman and Werner emission whilst removing contamination from the geocoronal Lyman-alpha. Jupiter will be positioned such that only the auroral region and nearby disc will be in the 25x25" field of view, and thus <1/4 of the detector is filled with the planet. We will obtain ~2400 s time-tagged exposures, from which images integrated over smaller intervals (e.g. 10-100 s) will be extracted. POS_ANG parameters will be provided in a timely manner. They depend on the exact observing time and ORIENT angle and are such that STIS MAMA repeller wire does not cross the auroral region. n/a Solar System Astronomy Solar System Astronomy 6 false false false false false false false 42 true SUPPORTED SOLAR SYSTEM For the purposes of the Phase 2 form I have included placeholder values for the position angle and radius for a given time (chosen arbitrarily for 8 Nov 2020 to ensure that Jupiter was in view for tool checks). However, the actual position angle and radius will depend on the date and time of the observation, which in turn will depend on the schedulability of both Chandra and HST. We can provide updated position angles and radii for a more suitable window once schedulability is determined for both spacecraft. PLANET JUPITER NORTH AURORA STD=JUPITER TYPE=POS_ANGLE,RAD=25,ANG=25,REF=NORTH CML OF JUPITER FROM EARTH BETWEEN 120 220, NOT OCC OF JUPITER-AURORA-WITH-CHANDRA BY JUPITER FROM EARTH EARTH STIS/FUV-MAMA Imaging No No F25SRF2 1630506258175 The scheduling data was generated by CASM 28.2. CASM was run in Phase II mode. /private/var/folders/z3/xy_g1v_s5fz9yrhzb8thz4cr0001qc/T/OPVisit11282101760889661873.xml (Tic-Visit :proposal-id 16118 :visit-id "01" :proposal-version -1 :trans-version "20210514" :date "01-Sep-2021 10:24:18.0" :trans-errors '(:WARNINGS 0 :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 1530800 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 16118 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 16118 :visit-id "01" :orbit-number 1 :pcs-time 393 :si-vis-utilization 2338 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 2731 :pcs-gap 0 ) true 1 0 We again note that the precise date and time of the observation will be determined from schedulability of Chandra and HST together, so that some of these parameters may be prone to change, when the observation date-time is better constrained.