0 Assigned ID: 1195 ----- Attempting Submission 1 (Thu Oct 01 15:06:19 GMT 2015) ----- HST Phase I Proposal 1195 (HD219134b.HST.DDT.apt) successfully submitted. Receipt: # 1195-1 ----- Attempting Submission 2 (Thu Oct 01 19:49:56 GMT 2015) ----- Number of observations per orbit updated -1354260613 ----- Attempting Submission 1 (Thu Dec 10 16:37:06 GMT 2015) ----- ----- Attempting Submission 2 (Tue Dec 29 20:38:50 GMT 2015) ----- ----- Attempting Submission 3 (Fri Mar 11 15:04:27 GMT 2016) ----- ----- Attempting Submission 4 (Sat Apr 30 19:28:47 GMT 2016) ----- ----- Attempting Submission 5 (Wed May 04 13:35:18 GMT 2016) ----- Atmospheric Sodium and a Precise Radius for the Closest Super-Earth Two months ago our team announced the super-Earth HD219134b orbiting a V = 5.57 star 6.5 pc away from us (Motalebi et al. 2015). This is the brightest and closest transiting system discovered so far. With Spitzer and HARPS-N we confirmed that HD219134b is rocky, but we have no idea how its atmosphere looks like. The star's brightness allows for unprecedented detailed atmospheric studies of a super-Earth via transmission spectroscopy. In a parallel proposal to this one we have requested 5 HST orbits to search for H in the upper atmosphere of the planet with STIS/UV. Here we request mid-Cycle program time to search for NaI. The optical NaI signature is a powerful upper atmospheric temperature probe, and is detectable over several scale heights. Also, in the case of HD219134b, NaI will reveal whether the planet has an atmosphere fully depleted of H and C because of strong evaporation. Even in the case of a non-detection of NaI, these observations will produce an optical transit light curve with fantastic precision, which will represent for super-Earths what the famous STIS observation of HD 209458b in 2002 has represented for giant planets. Four HST orbits are enough to secure a NaI detection. Even if no NaI is detected, this observation will pin down the radius of HD219134b to ~1.5% (currently 5%) so we can can better constrain its interior composition. These observations will also lead the way for thorough atmospheric characterization studies of this planet in the next HST cycles. For that purpose, and so the community gains quick access to these results, we have reduced the priority period to 3 months. Our program observes a transit of HD219134b in the optical using STIS G750M spectroscopic mode. We observe the target in one visit of four consecutive orbits. Four consecutive orbits are essential to cover in-transit and out-of-transit portions of the event to establish the baseline stellar flux necessary to accurately measure the transit depth. During the visit, the first two orbits will occur before transit, the third orbit during transit and the fourth orbit after transit. We disable auto-wavecals during the observations to optimize duty cycle and photometric precision, and only collect one GO-wavecal at the end of the visit using a 52" x 0.2" slit, instead of the 52" x 2" science slit, selected to minimize slit loses. This technique has been succesfully employed in several previous programs, e.g. GO-11740 (PI Pont) and GO-12473 (PI Sing). The transit of HD219134b only lasts 57 min, so to maximize the time of the in-transit observations we request a time window for the start of the first exposure of the first orbit between 0.94298 and 0.94388 in planetary orbital phase. To optimize duty cycle our observations are 60 sec per exposure. This exposure time oversaturates the STIS CCD by a factor of ~ 2.4, but following the analysis approach described by Gilliland et al. (1999) (PASP, 111, 1009), we will be able to recover all stellar counts by integrating the spectra in the spatial direction over columns containing bled photons. To account for that bleeding, and still keep moderate readout time, we select a subarray of 300 pixels for the observations. EXTRA-SOLAR PLANETS 3 false false false false false false AVAILABLE STAR EXTRA-SOLAR PLANETARY SYSTEM K V-IV NO HD219134 J2000 J2000 U = 7.46, B = 6.56, R = 4.76 STIS/CCD Spectroscopic No No G750M 6094 The scheduling data was generated by CASM 24.0. CASM was run in Phase II mode. It's essential that the four orbits are scheduled in a single, contiguous block. We also want to disable wavecals during throughout the visit and do wavelength calibrations only at the end of the four-orbit sequence. 1466386431000 249.0 (Tic-Visit :proposal-id 14464 :visit-id "01" :proposal-version -1 :trans-version "20160129" :date "04-May-2016 09:30:49.0" :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 720944 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14464 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14464 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2660 :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 3017 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14464 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2780 :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 3017 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14464 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2781 :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 3017 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14464 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2787 :al-overhead-at-end 0 :internal-dur-at-end 408 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3017 :pcs-gap 0 ) false 4 0 It's essential that the four orbits are scheduled in a single, contiguous block. We also want to disable wavecals during throughout the visit and do wavelength calibrations only at the end of the four-orbit sequence. (Tic-Visit :proposal-id 14464 :visit-id "01" :proposal-version -1 :trans-version "20160129" :date "04-May-2016 09:30:49.0" :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 720944 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14464 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14464 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2660 :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 3017 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14464 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2780 :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 3017 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14464 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2781 :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 3017 :pcs-gap 0 ) (Tic-Orbit :proposal-id 14464 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2787 :al-overhead-at-end 0 :internal-dur-at-end 408 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3017 :pcs-gap 0 ) false 4 0