Assigned ID: 2010 ----- Attempting Submission 1 (Fri May 06 17:16:45 GMT 2011) ----- The phase constraints on the ACQ exposure of the first orbit of each visit could be (slightly) extended in the case of a difficult schedulability of the visits. The ACQ/PEAK exposures are set with a slit twice as narrow as the slit used for the science exposure: I assume this would improve the centering. I deleted the AUTO-WAVECAL and added GO-WAVECAL at the end of each orbit, during occultations (permission granted by C. Proffitt). All the exposures meant to be done sequentially during an orbit are encapsulated within a non-interruptible sequence container. I assume there is no need to encapsulate the 4 orbits of a visit within a higher-level non-interruptible sequence container, however they should be executed without being interrupted. There are no such constraints at the visit level: the two visits are independent. ----- Attempting Submission 1 (Mon Jul 18 08:59:18 GMT 2011) ----- Search for a photodissociated evaporating ocean on the super-Earth 55 Cancri e The super-Earth exoplanet 55 Cancri e was recently detected in transit of its extremely bright (V=6) star. The different planet radii and densities measured in the visible with MOST and in the near-infrared with Spitzer suggest that this planet host at least 10% of water in mass, most likely in the form of a thick gaseous envelope. The planet features an extreme equilibrium temperature and a small Roche lobe, both in favor of an escape of atmospheric water which should be promptly dissociated beyond the Roche lobe. Because the star is exceptionnally close to Earth, the halo of atomic hydrogen resulting from the water dissociation is observable with HST at Lyman alpha. The detection of this atomic hydrogen will be the first signature of an evolved evaporating ocean on an extrasolar planet as well as the first validation of internal structure models of exoplanets in this mass regime.
This program consists in 2 visits of 4 orbits. In each visit, we will observe the transit of an exoplanet in front of its parent star, which happens every 0.73 day and lasts for about 1.7h. Thus, each visit will completely cover the transit. The timing requirements are set as phase constraints on the first acquisition (ACQ) exposure of the first orbit of each visit. The given phase is specified so that the 2 first science exposures (1 science exposure is done during each orbit) can be completed before the transit, the third science exposure can occur during the transit, and the fourth science exposure can occur completely after the transit. Having the third (science part of the) orbit completed integrally during the transit is essential for the success of the program. The phase constraints given for the first orbit authorize a margin of 10 min. There is also an ACQ/PEAK exposure at the beginning of each visit: it is set with the G430L grating (the detector would get saturated with the mirror) and the 52"x0.05" slit, while the science exposures are to be done with the G140M grating and the 52"x0.1". EXTRA-SOLAR PLANETS 0 false 0.0 0.0 false false false false AVAILABLE STAR EXTRA-SOLAR PLANETARY SYSTEM G V-IV K V-IV This star is in a double system (common proper motions) with 55 Cancri B (GJ 324B), a much fainter (V=13) M4 dwarf that is 1.4-arcmin away. It also 4.6-arcmin away from the similarly bright (V=6.3) star 53 Cancri (BO Cancri). HR3522 GJ324A J2000 B=6.82, R=5.4, I=5.0, J=4.768, H=4.265, K=4.015 STIS/FUV-MAMA Spectroscopic No No G140M 1222 /private/var/folders/e-/e-qTwr2aH5ewdRe42vPCGE+++TI/-Tmp-/OPVisit2071340907594304344.xml Phase windows are not calculated when the period is less than 1.5 days. Assuming no scheduling restrictions for Phase 0.792/0.802. The scheduling data was generated by CASM 19.3. CASM was run in Phase II mode. First transit. (Tic-Visit :proposal-id 12681 :visit-id "01" :proposal-version -1 :trans-version "20110509" :date "18-Jul-2011 10:58:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1114256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12681 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12681 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2924 :al-overhead-at-end 0 :internal-dur-at-end 364 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12681 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 364 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12681 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 364 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12681 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 626 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 4 0 /Users/DavidEhrenreich/Documents/Travail/Propositions/HST/HST Cycle 19/DD_55Cnc/Phase II/OP-cache/55Cnc_Phase2-v02.xml Phase windows are not calculated when the period is less than 1.5 days. Assuming no scheduling restrictions for Phase 0.792/0.802. The scheduling data was generated by CASM 19.3. CASM was run in Phase II mode. Second transit. (Tic-Visit :proposal-id 12681 :visit-id "02" :proposal-version -1 :trans-version "20110509" :date "18-Jul-2011 10:58:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 1114256 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12681 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12681 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2924 :al-overhead-at-end 0 :internal-dur-at-end 364 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12681 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 364 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12681 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 364 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12681 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 626 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 4 0