Collecting the Missing Piece of the Puzzle: The Wind Temperatures of Arcturus (K2 III) and Aldeberan (K5 III)

First submission: test to make sure things are OK Penultimate version (2.12pm) OK it is tea time. small word changes 1547499588 Assigned ID: 770 ----- Attempting Submission 1 (Fri Apr 07 19:15:07 GMT 2017) ----- HST Phase I Proposal 770 (Harper_Ayres_SiIII1206_final.apt) successfully submitted. Receipt: # 770-1 ----- Attempting Submission 2 (Fri Apr 07 20:11:56 GMT 2017) ----- HST Phase I Proposal 770 (Harper_Ayres_Cycle25.apt) successfully submitted. Receipt: # 770-2 ----- Attempting Submission 3 (Fri Apr 07 21:36:52 GMT 2017) ----- First submission. Use of non-default GO WAVE exposures of 50 sec for E140H i1271 and i1307 has been approved (0.2x0.2 arcsec aperture). WAVE expsoures are taken either during GS-REACQ or at end of orbit 1630736341 ----- Attempting Submission 1 (Mon Jul 17 15:29:43 GMT 2017) ----- Collecting the Missing Piece of the Puzzle: The Wind Temperatures of Arcturus (K2 III) and Aldeberan (K5 III) Unravelling the poorly understood processes that drive mass loss from red giant stars requires that we empirically constrain the intimately coupled momentum and energy balance. Hubble high spectral resolution observations of wind scattered line profiles, from neutral and singly ionized species, have provided measures of wind acceleration, turbulence, terminal speeds, and mass-loss rates. These wind properties inform us about the force-momentum balance, however, the spectra have not yielded measures of the much needed wind temperatures, which constrain the energy balance. We proposed to remedy this omission with STIS E140H observations of the Si III 1206 Ang. resonance emission line for two of the best studied red giants: Arcturus (alpha Boo: K2 III) and Aldebaran (alpha Tau: K5 III), both of which have detailed semi-empirical wind velocity models. The relative optical depths of wind scattered absorption in Si III 1206 Ang., O I 1303 Ang. triplet., C II 1335 Ang., and existing Mg II h & k and Fe II profiles give the wind temperatures through the thermally controlled ionization balance. The new temperature constraints will be used to test existing semi-empirical models by comparision with multi-frequency JVLA radio fluxes, and also to constrain the flux-tube geometry and wave energy spectrum of magnetic wave-driven winds. General: We have been awarded 10 orbits to observe 2 bright K giants at the Si III 1206 Angstrom emission line with the E140H setting. Additional emission line diagnostics lie shortward (C III 1175) and longward(O I 1303, C II 1335, and Si IV 1402) of this region. Both stars have been observed with HST and IUE in this region, and these spectra are used for the SCIENCE ETC calculations. Alpha Boo has 4 orbits allocated and alpha Tau, which is slightly fainter in the FUV, has 6 orbits. We schedule a single 4-orbit Visiit for alpha Boo (to avoid being too wasteful), and two 3-orbit Visits foir alpha Tau to aid scheduling. We are using 2 E140H settings: i1271 and i1307 to place the Si III 1206 line at different positions on the detector, and to capture as much additional spectra shortward and longward as possible. We request GO WAVE observations of 50 sec (for both setting) that are deeper than the default exposures. We use the 0.2x0.2 arcsec aperture for SCIENCE and WAVE observations. Details: ACQ: we acquire the target using the STIS/CCD woth the F25ND5 aperture as these stars are very bright in the optical: alpha Boo V=-0.05, alpha Tau=0.86. We use the Pickles K3 III (alpha Boo) and K5 III (alpha Tau) synthetic spectra for the ETC ACQ/PEAK: For both stars we use the STIS/CCD with the G430M at 3680 Ang. (alpha Boo) and 3960 Ang. (alpha Tau) with the 0.2x0.05ND apertture. SCIENCE: all science observations use the 0.2x0.2 arcsec aperture. We use 2 settings: i1271 and i1307 splitting the observing time approximately equally between the two. WAVE: we specify 50 sec exposures (with the 0.2x0.2 arcsec aperture). These are deeper than the defaults. Each Visit contains 2 WAVE exposures: one at the beginning of the Visit and one inserted during occultation before a following science observation. This occurs during the GS Reacq. Stellar Physics Stellar Physics 0 false false true false false false false AVAILABLE STAR K III-I NO This object was generated by the targetselector and retrieved from the SIMBAD database. ALPHA-BOO ARCTURUS J2000 J2000 STAR K III-I NO This object was generated by the targetselector and retrieved from the SIMBAD database. ALPHA-TAU ALDEBARAN J2000 J2000 STIS/FUV-MAMA Spectroscopic No No E140H 1271 STIS/FUV-MAMA Spectroscopic No No E140H 1271 STIS/FUV-MAMA Spectroscopic No No E140H 1271 1500305173725 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. 1530014454000 141.9963378655038 (Tic-Visit :proposal-id 15234 :visit-id "01" :proposal-version -1 :trans-version "20170613" :date "17-Jul-2017 09:26:13.0" :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 1323552 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15234 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15234 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2883.0 :al-overhead-at-end 0 :internal-dur-at-end 178.0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15234 :visit-id "01" :orbit-number 2 :pcs-time 0 :si-vis-utilization 2994.0 :al-overhead-at-end 0 :internal-dur-at-end 178.0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15234 :visit-id "01" :orbit-number 3 :pcs-time 0 :si-vis-utilization 2927.0 :al-overhead-at-end 0 :internal-dur-at-end 178.0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15234 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 2994 :al-overhead-at-end 0 :internal-dur-at-end 608 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3216 :pcs-gap 0 ) false 4 0 Pickles K3 III Model Global Count Rates Source only 445,758.088 Time to Saturation = 1.57 sec Pickles K3 III model Global Count Rates Source only 375,515.122 s-1 deeper exposure for optimum wavcal solution Exp approx Using the 4/5 buffer time rule. deeper than default exposure for optimum wavecl using the 4/5 Buffer time rule deeper than default exposure for optimum wavecl Using 4/5 buffer-time rule Final wavecal during occultation 1552504243069 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. 1553650671000 85.80000000000001 (Tic-Visit :proposal-id 15234 :visit-id "02" :proposal-version -1 :trans-version "20181130" :date "13-Mar-2019 15:10:42.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 539632 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15234 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15234 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2126 :al-overhead-at-end 0 :internal-dur-at-end 346 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15234 :visit-id "02" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2830 :al-overhead-at-end 0 :internal-dur-at-end 466 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15234 :visit-id "02" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2530 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 3 0 Pickles K5 III model Global Count Rates Source only 257,844.378 Deeper than defaul expsosure for optimum wavecal 4/5 buffer-time rule used Using 4/5 buffer-time rule Deeper than default exposure for optimum wavecal 4/5 buffer time rule applied 1552506656097 The scheduling data was generated by CASM 25.2. CASM was run in Phase II mode. 1553627792000 81.75297999999998 (Tic-Visit :proposal-id 15234 :visit-id "03" :proposal-version -1 :trans-version "20181130" :date "13-Mar-2019 15:50:55.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 609216 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15234 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15234 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2125 :al-overhead-at-end 0 :internal-dur-at-end 345 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15234 :visit-id "03" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2854 :al-overhead-at-end 0 :internal-dur-at-end 467 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15234 :visit-id "03" :orbit-number 3 :pcs-time 302 :si-vis-utilization 2530 :al-overhead-at-end 0 :internal-dur-at-end 440 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 3 0 Deeper than default exposure for optimum wavecal Deeper than default exposure for optimum wavecal Deeper than default exposure for optimum wavecal 1557429800147 The scheduling data was generated by CASM 26.0. CASM was run in Phase II mode. /private/var/folders/46/4jpf0wpx40jbz16h87362w240001d2/T/OPVisit15022731919788536729.xml (Tic-Visit :proposal-id 15234 :visit-id "51" :proposal-version -1 :trans-version "20181130" :date "09-May-2019 15:23:20.0" :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 592272 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15234 :visit-id "51" :obset-id "51" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15234 :visit-id "51" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2763.0 :al-overhead-at-end 0 :internal-dur-at-end 178.0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) (Tic-Orbit :proposal-id 15234 :visit-id "51" :orbit-number 2 :pcs-time 302 :si-vis-utilization 2854.0 :al-overhead-at-end 0 :internal-dur-at-end 608.0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3156 :pcs-gap 0 ) true 2 0 Pickles K3 III Model Global Count Rates Source only 445,758.088 Time to Saturation = 1.57 sec deeper than default exposure for optimum wavecl Using 4/5 buffer-time rule Final wavecal during occultation