Jupiter stray light background measurements for future Europa STIS observations

A target acquisition should probably be performed before doing spectroscopy or coronography with STIS or COS. A couple of questions remain: 1) do we need the target acq on visit 1 (or need to add a TA to visit 2)? 2) can we please visualize the slit locations relative to jupiter to make certain that the offsets are correct? Thanks! Note that I fixed the unused target#4 from the draft APT file I emailed around. 1690688694 ----- Attempting Submission 1 (Sun Jul 30 16:32:44 GMT 2017) ----- This is the point of our question to our PC. Jupiter stray light background measurements for future Europa STIS observations This proposal characterizes the STIS/CCD background in the G230MB and G750M modes within 1 arc minutes of Jupiter. These measurements are intended to support future observations of the Jovian satellites. This is motivated by the discovery of water vapor near Europa's south pole (Roth et al., 2014) which has important implications for the search for life in our Solar System. The presence of water plumes comprises the possibility that Europa's potentially habitable subsurface ocean can be directly probed by the upcoming NASA and ESA missions. On September 26, 2017, new possible sightings of plumes were reported in STIS images showing Europa in transit of Jupiter (Sparks et al. 2016). These images yield, however, no information on the plumes' composition. What is needed is a more sensitive method of detecting the presence of water molecules, in order to draw conclusions about a connection to subsurface water. Proposal 14903 (PI: Roth) tested COS NUV and STIS visible aurora observations in eclipse to provide higher sensitivities to H2O abundances than the FUV detections of Roth et al. (2014) and found significant stray light issues. This is what we would plan to accomplish over three orbits: 1) G750M (2 orbits) 2x52 slit offset 28 arc seconds from limb of Jupiter 2x52 slit offset 38 arc seconds from the limb of Jupiter 2x2 slit offset 5, 15, 45 arc seconds from the limb of Jupiter Orientation: PA selected such at long slit is aligned with vector toward center of Jupiter (+/- 10 deg) Exposure times of 10, 100, 300 seconds at each location (TBD:tune to fill orbits) 2) G230MB (1 orbit) 2x2 slit placed 15 arc seconds and 30 arc seconds from limb of Jupiter 2X52 slit placed 38 arc seconds from the limb of Jupiter (i.e. with aperture at center of long slit it extends from 10 to 62 arc seconds from limb) Orientation: PA selected such at long slit is aligned with vector toward center of Jupiter (+/- 10 deg) same Orient as item #1 above Exposure times of 30, 400 seconds at each location (TBD: tune to fill orbit) Solar System 0 AVAILABLE SOLAR SYSTEM Jupiter's equatorial angular radius ranges 16.30 to 16.64 arcsec on Aug 14 to 24. Round up to 17 arcsec. Offsetting the 26 arcsec slit center from the limb plus ~2 arcsec margin is RAD=45 PLANET Investigating the instrument plus telescope stray light performance for satellite eclipse observations near Jupiter STD=JUPITER TYPE=POS_ANGLE,RAD=45,ANG=66.5,REF=NORTH EARTH SOLAR SYSTEM Jupiter's equatorial angular radius ranges 16.30 to 16.64 arcsec on Aug 14 to 24. Round up to 17 arcsec. Offsetting the 2x52 slit center 10 arcsec from previous (i.e., total 38 arcsec from limb) is RAD=55. PLANET Investigating the instrument plus telescope stray light performance for satellite eclipse observations near Jupiter STD=JUPITER TYPE=POS_ANGLE,RAD=55,ANG=66.5,REF=NORTH EARTH SOLAR SYSTEM Jupiter's equatorial angular radius ranges 16.30 to 16.64 arcsec on Aug 14 to 24. Round up to 17 arcsec. Offsetting the 2x2 arcsec slit center from the limb plus 5 arcsec is RAD=22. PLANET Investigating the instrument plus telescope stray light performance for satellite eclipse observations near Jupiter STD=JUPITER TYPE=POS_ANGLE,RAD=22,ANG=66.5,REF=NORTH EARTH SOLAR SYSTEM Jupiter's equatorial angular radius ranges 16.30 to 16.64 arcsec on Aug 14 to 24. Round up to 17 arcsec. Offsetting the 2x2 arcsec slit center from the limb plus 15 arcsec is RAD=32. PLANET Investigating the instrument plus telescope stray light performance for satellite eclipse observations near Jupiter STD=JUPITER TYPE=POS_ANGLE,RAD=32,ANG=66.5,REF=NORTH EARTH SOLAR SYSTEM Jupiter's equatorial angular radius ranges 16.30 to 16.64 arcsec on Aug 14 to 24. Round up to 17 arcsec. Offsetting the 2x2 arcsec slit center from the limb plus 30 arcsec is RAD=47. PLANET Investigating the instrument plus telescope stray light performance for satellite eclipse observations near Jupiter STD=JUPITER TYPE=POS_ANGLE,RAD=47,ANG=66.5,REF=NORTH EARTH SOLAR SYSTEM Jupiter's equatorial angular radius ranges 16.30 to 16.64 arcsec on Aug 14 to 24. Round up to 17 arcsec. Offsetting the 2x2 arcsec slit center from the limb plus 45 arcsec is RAD=62. PLANET Investigating the instrument plus telescope stray light performance for satellite eclipse observations near Jupiter STD=JUPITER TYPE=POS_ANGLE,RAD=62,ANG=66.5,REF=NORTH EARTH STIS/CCD Spectroscopic No No G230MB 3115 STIS/CCD Spectroscopic No No G750L 7751 1501606408535 Using ephemeris for target 15371-01-JUPITER-OFFSET-1 ephemeris data for target 15371-01-JUPITER-OFFSET-1 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.182. ephemeris interval: 17.181 to 19.182 Using ephemeris for target 15371-01-JUPITER-OFFSET-2 ephemeris data for target 15371-01-JUPITER-OFFSET-2 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.182. ephemeris interval: 17.181 to 19.182 Using ephemeris for target 15371-01-JUPITER-OFFSET-3 ephemeris data for target 15371-01-JUPITER-OFFSET-3 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.182. ephemeris interval: 17.181 to 19.182 Using ephemeris for target 15371-01-JUPITER-OFFSET-5 ephemeris data for target 15371-01-JUPITER-OFFSET-5 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.182. ephemeris interval: 17.181 to 19.182 Using ephemeris for target 15371-01-JUPITER-OFFSET-7 ephemeris data for target 15371-01-JUPITER-OFFSET-7 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.182. ephemeris interval: 17.181 to 19.182 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. 1) G750M (2 orbits) 2x52 slit offset 28 arc seconds from limb of Jupiter 2x52 slit offset 38 arc seconds from the limb of Jupiter 2x2 slit offset 5, 10, 15, 30, 45 arc seconds from the limb of Jupiter Orientation: PA selected such at long slit is aligned with vector toward center of Jupiter (+/- 10 deg) Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) (Tic-Visit :proposal-id 15371 :visit-id "01" :proposal-version -1 :trans-version "20170613" :date "01-Aug-2017 12:53:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 312880 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15371 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15371 :visit-id "01" :obset-id "A1" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15371 :visit-id "01" :obset-id "B1" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15371 :visit-id "01" :obset-id "C1" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15371 :visit-id "01" :obset-id "D1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15371 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2305 :al-overhead-at-end 0 :internal-dur-at-end 379 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15371 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2916 :al-overhead-at-end 0 :internal-dur-at-end 360 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 2 0 15 arc seconds and 30 arc seconds from limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 15 arc seconds and 30 arc seconds from limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 15 arc seconds and 30 arc seconds from limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 15 arc seconds and 30 arc seconds from limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 15 arc seconds and 30 arc seconds from limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 15 arc seconds and 30 arc seconds from limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 2x2 slit offset 5, 10, 15, 30, 45 arc seconds from the limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 2x2 slit offset 5, 10, 15, 30, 45 arc seconds from the limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 2x2 slit offset 5, 10, 15, 30, 45 arc seconds from the limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 2x2 slit offset 5, 10, 15, 30, 45 arc seconds from the limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 2x2 slit offset 5, 10, 15, 30, 45 arc seconds from the limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 2x2 slit offset 5, 10, 15, 30, 45 arc seconds from the limb of Jupiter. Exposure times of 10, 100, 300, 300 seconds at each location (TBD:tune to fill orbits) 1501503516818 Using ephemeris for target 15371-02-JUPITER-OFFSET-5 ephemeris data for target 15371-02-JUPITER-OFFSET-5 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.182. ephemeris interval: 17.181 to 19.182 Using ephemeris for target 15371-02-JUPITER-OFFSET-6 ephemeris data for target 15371-02-JUPITER-OFFSET-6 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.182. ephemeris interval: 17.181 to 19.182 Using ephemeris for target 15371-02-JUPITER-OFFSET-2 ephemeris data for target 15371-02-JUPITER-OFFSET-2 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.182. ephemeris interval: 17.181 to 19.182 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. G230MB (1 orbit) 2x2 slit placed 15 arc seconds and 30 arc seconds from limb of Jupiter 2X52 slit placed 38 arc seconds from the limb of Jupiter (i.e. with aperture at center of long slit it extends from 10 to 62 arc seconds from limb) Orientation: PA selected such at long slit is aligned with vector toward center of Jupiter (+/- 10 deg) same Orient as item #1 above Exposure times of 30, 400, 400 seconds at each location (TBD: tune to fill orbit) (Tic-Visit :proposal-id 15371 :visit-id "02" :proposal-version -1 :trans-version "20170613" :date "31-Jul-2017 08:18:36.0" :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 165648 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15371 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15371 :visit-id "02" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 15371 :visit-id "02" :obset-id "B2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15371 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2863 :al-overhead-at-end 0 :internal-dur-at-end 360 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3202 :pcs-gap 0 ) false 1 0 Exposure times of 30, 400, 400 seconds at each location (TBD: tune to fill orbit) Exposure times of 30, 400, 400 seconds at each location (TBD: tune to fill orbit) Exposure times of 30, 400, 400 seconds at each location (TBD: tune to fill orbit) Exposure times of 30, 400, 400 seconds at each location (TBD: tune to fill orbit) Exposure times of 30, 400, 400 seconds at each location (TBD: tune to fill orbit) Exposure times of 30, 400, 400 seconds at each location (TBD: tune to fill orbit)