0 Assigned ID: 119 ----- Attempting Submission 1 (Wed Apr 09 19:25:35 GMT 2014) ----- HST Phase I Proposal 119 (sc.c22.apt) successfully submitted. ----- Attempting Submission 2 (Wed Apr 09 21:04:36 GMT 2014) ----- HST Phase I Proposal 119 (sc.c22.apt) successfully submitted. ----- Attempting Submission 3 (Fri Apr 11 14:39:55 GMT 2014) ----- In this submission I have updated the buffer times for exposures 01.005 and 03.005 following discussion with the CS. Nothing else has changed. Thanks. 2016440869 ----- Attempting Submission 1 (Mon Jul 14 19:17:10 GMT 2014) ----- ----- Attempting Submission 2 (Tue Sep 09 16:16:36 GMT 2014) ----- The Smith Cloud: Galactic or Extragalactic? The Milky Way is surrounded by a population of gaseous high-velocity clouds (HVCs), which play an important role in bringing fresh fuel for star formation into the disk. The Smith Cloud is an HVC in an advanced state of accretion, only ~30 Myr away from impacting the Galactic plane. It is unique among HVCs in having a known distance (12.4 kpc) and a well-constrained 3D velocity (300 km/s), but we do not yet know its metallicity, which would distinguish between Galactic (metal-enriched) and extragalactic (metal-poor) origins. Here we propose a program to measure the Smith Cloud's metallicity using HST/COS spectra of three AGN lying behind the Cloud and its wake. Combining the UV metal-line (O I and S II) column densities with existing H I column densities will lead to precise abundance measurements for the Smith Cloud, directly constraining its origin. In addition, the relative strength of depleted (Fe II, Si II) to undepleted (S II) UV absorption lines will be used to infer its dust content. Finally, we will search for variation in the ionization level and kinematics between the three sight lines, which would indicate a disruptive encounter with the hot Galactic corona. This is a nine-orbit COS/G130M spectroscopic program to study the chemical and physical properties of the Smith Cloud, a high-velocity cloud (HVC) falling onto the Galactic disk. The program observes three QSOs, with a single three-orbit visit on each QSO. Each target is fairly faint in the UV, with F_1300 between 0.5e-14 and 0.8e-14 erg/cm^2/s^-1/A^-1, so there are no bright-object concerns (all three fields pass BOT checks with both GSC II and GALEX catalogs). All four FP-POS positions are used within each visit with the 1291 CENWAVE setting. ISM AND CIRCUMSTELLAR MATTER Default false true false false false SUPPORTED ISM ABSORPTION LINE SYSTEM HIGH VELOCITY CLOUD This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 F_1300=0.75e-14 (cgs) ISM ABSORPTION LINE SYSTEM HIGH VELOCITY CLOUD SIMBAD coordinates did not match position of target on finder charts. DEC changed by +1.5", RA changed by +0.08s to match target. J2000 J2000 F_1300=0.55e-14 (cgs) ISM ABSORPTION LINE SYSTEM HIGH VELOCITY CLOUD This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 J2000 F_1300=0.79e-14 (cgs) COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1291 COS/FUV Spectroscopic No No G130M 1291 /tmp/OPVisit1999261807092627105.xml The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13840 :visit-id "01" :proposal-version -1 :trans-version "20140605" :date "09-Sep-2014 12:15:57.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 330592 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13840 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13840 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2885 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13840 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2999 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13840 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2995 :al-overhead-at-end 0 :internal-dur-at-end 442 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13840 :visit-id "02" :proposal-version -1 :trans-version "20140605" :date "30-Jun-2014 11:38:14.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 313168 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13840 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13840 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2888 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13840 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2999 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13840 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2995 :al-overhead-at-end 0 :internal-dur-at-end 442 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) true 3 0 /tmp/OPVisit236656230692031844.xml The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13840 :visit-id "03" :proposal-version -1 :trans-version "20140605" :date "09-Sep-2014 12:15:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 321904 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13840 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13840 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2888 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13840 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2999 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13840 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 2995 :al-overhead-at-end 0 :internal-dur-at-end 442 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3222 :pcs-gap 0 ) true 3 0