Science Keywords is a required field. Science Keywords: Select from 3 to 5 items. Please specify your scheduling constraints or 'No Constraints' on all Observation forms. 0 Assigned ID: 1229 ----- Attempting Submission 1 (Tue Nov 10 16:25:24 GMT 2015) ----- HST Phase I Proposal 1229 (petigura.apt) successfully submitted. Receipt: # 1229-1 ----- Attempting Submission 2 (Tue Nov 10 17:55:45 GMT 2015) ----- Joint Spitzer/HST Phase I to II conversion LONG SU LIKELY TO INTERSECT THE SAA Unschedulable Visit 0 ----- Attempting Submission 1 (Wed Dec 16 23:25:22 GMT 2015) ----- This observation requires 9 contiguous observations. The orbit planner says we're likely to intersect the SAA. Could we please schedule so that orbit 1 is intersects the SAA. We propose a joint Spitzer/HST proposal to observe transits of two warm, sub-Saturn sized planets orbiting EPIC-203771098 (EPIC-2037 hereafter), a bright G dwarf observed by K2. EPIC-2037b and c are 5.7+-0.6 and 7.6+-0.8 Earth-radii. Sine the two planets are close to the 2:1 mean-motion resonance, transit timing variations (TTVs) are expected to be large (several hours). Our proposed Spitzer transit observations will yield precise transit times for EPIC-2037b and c. We will model the TTVs to constrain the eccentricities of EPIC-2037b and c which are linked to the formation pathway for this system. EPIC-2037b and c have low densities of 0.4 g/cc and 0.2 g/cc, respectively. Their large size and low surface gravities make these planets favorable targets for transmission spectroscopy by Spitzer, HST, and JWST. In addition to their favorable observability, the planets have low equilibrium temperatures of ~710 K and ~560 K, respectively. These temperatures have not been well-explored in previous studies with transmission spectroscopy. While over a dozen HST+Spitzer transmission spectra have been published in the literature, only GJ1214b, GJ346b, HAT-P-11b, and HAT-P-12b have comparable temperatures. While Spitzer can detect wavelength-dependent variation in transit depth, the Spitzer measurements alone cannot discriminate between various atmospheric compositions. Therefore we propose to use HST/WFC3 to probe the atmosphere of EPIC-2037b. The HST transmission spectrum will probe water vapor in the atmosphere, which reflects the planet's oxygen abundance, a proxy for the planet's heavy element enrichment. In this program we will observe a GIII star, EPIC-203771098, during the transit of a sub-Saturn sized planet, EPIC-203771098b. This program consists of a single visit of nine orbits, and it is essential for the nine orbits to be scheduled as a contiguous block. Orbit 1 allows for thermal settling, orbits 2 and 3 measure out-of-transit flux, orbits 4-7 observe EPIC-2037 during the transit of EPIC-2037B, and orbits 8 and 9 measure out-of-transit flux. The total allowed window for the start of the first exposure in orbit 1 is 0.9830-0.9865 in planet orbital phase, corresponding to a 105 minute interval. APT warns that a program with 9 contiguous orbits will likely intersect the SAA. If possible, please schedule so that if there is an SAA crossing, it intersects at orbit 1, the thermal settling orbit. The spectrum of a neighboring star 26 arcsec to the SW should not overlap with the first order spectrum of EPIC-2037. Please schedule observations when the telescope has the following oreintations: 130-235 and 315-55 deg. Please avoid the following orientations: 55-130, 235-315 deg. EXTRA-SOLAR PLANETS 12 false false false false false false SUPPORTED STAR G III-I NO EPIC-203771098 2MASSJ16101770-2459251 J2000 J2000 WFC3/IR Spectroscopic No No G141 1450307966590 The scheduling data was generated by CASM 23.2. CASM was run in Phase II mode. In this program we will observe a GIII star, EPIC-203771098, during the transit of a sub-Saturn sized planet, EPIC-203771098b. This program consists of a single visit of nine orbits, and it is essential for the nine orbits to be scheduled as a contiguous block. Orbit 1 allows for thermal settling, orbits 2 and 3 measure out-of-transit flux, orbits 4-7 observe EPIC-2037 during the transit of EPIC-2037B, and orbits 8 and 9 measure out-of-transit flux. The total allowed window for the start of the first exposure in orbit 1 is 0.9830-0.9865 in planet orbital phase, corresponding to a 105 minute interval. APT warns that a program with 9 contiguous orbits will likely intersect the SAA. If possible, please schedule so that if there is an SAA crossing, it intersects at orbit 1, the thermal settling orbit. The spectrum of a neighboring star 26 arcsec to the SW should not overlap with the first order spectrum of EPIC-2037. Please schedule observations when the telescope has the following oreintations: 130-235 and 315-55 deg. Please avoid the following orientations: 55-130, 235-315 deg. (Tic-Visit :proposal-id 14455 :visit-id "02" :proposal-version -1 :trans-version "20150609" :date "16-Dec-2015 15:19:20.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 9 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 3596112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14455 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2773 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 5 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 6 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 7 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 8 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14455 :visit-id "02" :orbit-number 9 :pcs-time 222 :si-vis-utilization 2982 :al-overhead-at-end 0 :internal-dur-at-end 478 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) false 9 0