Detection methods for water vapor in Europa's plumes.

The observations proposed here need to be obtained between January 1 and March 10, 2017. -727558630 Assigned ID: 1311 ----- Attempting Submission 1 (Mon Dec 19 10:13:49 GMT 2016) ----- This target is not used in this proposal. This target is not used in this proposal. For the best data quality, it is strongly recommended that all four FP-POS positions be used when observing at a given COS CENWAVE setting. Sensitive exposures should have an ETC run number provided. Sensitive exposures should have an ETC run number provided. 2 Feb 2017 - Aperture for STIS/CCD visit changed from 52x2 to 52x2E1. - ETC run for COS/NUV acqusition with Io added. 1567579473 ----- Attempting Submission 1 (Fri Jan 27 20:46:30 GMT 2017) ----- ----- Attempting Submission 2 (Thu Feb 02 09:24:49 GMT 2017) ----- Two not-used targets (Ganymede/Callisto) can be used for acquisition if needed instead of Io. The indicated epxosure time are based on previous COS programs of Galilean moons. Exposure time calculations will be carried out Detection methods for water vapor in Europa's plumes. The discovery of water vapor near Europa's south pole (Roth et al., 2014) has important implications for the search for life in our Solar System. The presence of water plumes comprises the outstanding possibility that Europa's potentially habitable subsurface ocean can be directly probed by the upcoming NASA and ESA missions. On September 26, 2016, 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. COS NUV and STIS visible aurora observations in eclipse can provide higher sensitivities to H2O abundances than the FUV detections of Roth et al. (2014). With this 2-orbit program, we determine the instrumental performance of stray light of two COS and STIS modes for observations of Europa in Jupiter eclipse between January and March 2017. If this assessment study reveals high sensitivity for the observing modes, they can be used in future programs to characterize the water abundance and variability in Europa's plumes. Two visits with one orbit each to study the performance of COS/NUV and STIS/CCD spectral observations when Europa is eclipsed by Jupiter. Visit 1: COS/NUV to observe OH band emission in eclipse. One of the other Galilean satellites is used for acquisition when Europa is in shadow. Visit 2: STIS/CCD to observe H-alpha and OI red line in eclipse. Again, one of the other Galilean satellites is used for acquisition when Europa is in shadow. Solar System 0 SUPPORTED SOLAR SYSTEM YES SATELLITE EUROPA STD=JUPITER STD=EUROPA SEP OF EUROPA-ECLIPSE JUPITER FROM EARTH GT 5", SEP OF EUROPA-ECLIPSE CALLISTO FROM EARTH GT 5", SEP OF EUROPA-ECLIPSE IO FROM EARTH GT 5", SEP OF EUROPA-ECLIPSE GANYMEDE FROM EARTH GT 5", ECL U FULL OF EUROPA-ECLIPSE BY JUPITER FROM EARTH EARTH SOLAR SYSTEM YES For target acquisition for Europa in eclipse. SATELLITE IO STD=JUPITER STD=IO SEP OF IO-ACQ JUPITER FROM EARTH GT 15", SEP OF IO-ACQ CALLISTO FROM EARTH GT 10", SEP OF IO-ACQ EUROPA FROM EARTH GT 10", SEP OF IO-ACQ GANYMEDE FROM EARTH GT 10", NOT TRANSIT OF IO ACROSS JUPITER FROM EARTH, NOT ECL U FULL OF IO BY JUPITER FROM EARTH EARTH SOLAR SYSTEM YES For target acquisition for Europa in eclipse SATELLITE GANYMEDE STD=JUPITER STD=GANYMEDE SEP OF GANYMEDE-ACQ JUPITER FROM EARTH GT 30", SEP OF GANYMEDE-ACQ CALLISTO FROM EARTH GT 10", SEP OF GANYMEDE-ACQ IO FROM EARTH GT 10", SEP OF GANYMEDE-ACQ EUROPA FROM EARTH GT 10", NOT TRANSIT OF GANYMEDE ACROSS JUPITER FROM EARTH, NOT ECL U FULL OF GANYMEDE BY JUPITER FROM EARTH EARTH SOLAR SYSTEM YES For target acquisition for Europa in eclipse SATELLITE CALLISTO STD=JUPITER STD=CALLISTO SEP OF CALLISTO-ACQ JUPITER FROM EARTH GT 30", SEP OF CALLISTO-ACQ IO FROM EARTH GT 10", SEP OF CALLISTO-ACQ EUROPA FROM EARTH GT 10", SEP OF CALLISTO-ACQ GANYMEDE FROM EARTH GT 10", NOT TRANSIT OF CALLISTO ACROSS JUPITER FROM EARTH, NOT ECL U FULL OF CALLISTO BY JUPITER FROM EARTH EARTH COS/NUV Spectroscopic No No G230L 3000 STIS/CCD Spectroscopic No No G750M 6581 1485958594622 Using ephemeris for target 14903-01-IO-ACQ ephemeris data for target 14903-01-IO-ACQ does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.089. ephemeris interval: 16.366 to 19.001 Using ephemeris for target 14903-01-EUROPA-ECLIPSE ephemeris data for target 14903-01-EUROPA-ECLIPSE does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.089. ephemeris interval: 16.366 to 19.001 The scheduling data was generated by CASM 25.0. CASM was run in Phase II mode. 1487026928000 293.43724863251657 (Tic-Visit :proposal-id 14903 :visit-id "01" :proposal-version -1 :trans-version "20170109" :date "01-Feb-2017 09:16:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "32" :si-bright-earth-limb-angle 20.0 :data-volume 313120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14903 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 14903 :visit-id "01" :obset-id "A1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14903 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2876 :al-overhead-at-end 0 :internal-dur-at-end 407 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3210 :pcs-gap 0 ) true 1 0 This acquisition mode has been sucessfully used in program 13803 for COS/FUV observations of Europa. The satellite for acquistion (Io now) can be changed to Ganymede or Callisto (Target GANYMEDE-ACQ / CALLISTO-ACQ) if more suitable for acquisition. 1486040385779 Using ephemeris for target 14903-02-IO-ACQ ephemeris data for target 14903-02-IO-ACQ does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.089. ephemeris interval: 16.366 to 19.001 Using ephemeris for target 14903-02-EUROPA-ECLIPSE ephemeris data for target 14903-02-EUROPA-ECLIPSE does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 16.214 to 18.089. ephemeris interval: 16.366 to 19.001 The scheduling data was generated by CASM 25.0. CASM was run in Phase II mode. /private/var/folders/zc/ljhf1lgn10b1yd9ytmwlp4jr00070l/T/OPVisit7752063506690598364.xml (Tic-Visit :proposal-id 14903 :visit-id "02" :proposal-version -1 :trans-version "20170109" :date "02-Feb-2017 07:59:45.0" :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 92608 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14903 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 14903 :visit-id "02" :obset-id "A2" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14903 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2806 :al-overhead-at-end 0 :internal-dur-at-end 399 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3140 :pcs-gap 0 ) true 1 0 Standard STIS acquisition mode, used many time for acqusition of Io, Europa and Ganymede in previsous STIS/FUV programs. I have to double-check if any of the optional parameters is need/indicated.