Production of the Heavy Elements in the Universe

Production of the Heavy Elements in the Universe We propose to use STIS to observe a sample of 4 metal-poor stars that have been enriched by only a small amount of material produced by the rapid neutron-capture process (r-process). These "r-poor" stars have 10-100 times less r-process material than the "r-rich" stars at similar metallicities (-2.5 < [Fe/H] < -1.7). The r-poor stars fill in a crucial gap in our understanding of how the heavy elements were produced in the early Galaxy by revealing whether there is a continuous distribution of r-process abundance patterns between the most strongly r-enriched stars and those with only a trace of r-process enrichment. Guided by our previous STIS observing experience, we will obtain high S/N near-UV spectra (S/N = 50 near 230.0 nm and increasing to longer wavelengths) to derive abundances or meaningful upper limits for the heavy elements Ge, Zr, Cd, Lu, Os, Pt, and Pb. All of these elements (except Pb) can only be detected in very metal-poor stars in the near-UV using HST, and we have already made successful detections of them in r-rich stars. These elements are key to understanding the nature of the r-process in the first generations of stars that drive chemical evolution of the Galaxy. Our proposed observations also have the potential to determine more precise ages for the oldest Galactic halo stars. This work is supported by recent laboratory experiments and theoretical studies and will provide data of wider interest to the atomic, nuclear, and astrophysics communities.

We will use STIS to observe a sample of 4 metal-poor stars that have been enriched by only a small amount of material produced by the rapid neutron-capture process (r-process). All four target stars have been chosen on the basis of abundances derived from high-quality ground-based optical spectra and the stars' relative brightnesses. The transitions of interest are spaced over a wide wavelength range of the near-UV (2282 to 3058 Angstroms). Our target S/N (~50/1 per resolution element in the continuum near 2300 Angstroms) is based on our line strength predictions for relatively weak features. With this goal, the S/N will increase sufficiently to longer wavelengths to also detect weak features in other regions of the spectrum. We have estimated integration times using the current version of the STIS exposure time calculator for our setup based on MARCS models of the flux distribution predicted for our 4 target stars. COOL STARS 12 false 0.0 0.0 false false false false SUPPORTED STAR G III-I POPULATION II This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch (1991.25 --> 2000.0) updated 08mar2011 by iur using HIC from VizieR. PM (re?)updated 08mar2011 by iur using Hipparcos 2007 rereduction (I/311) from VizieR. GSC00288-00288 J2000 12 26 36.8338 +05 18 9.03 J2000 (B-V)=0.60+/-0.05, E(B-V)=0.02+/-0.02, TYPE=G5III STAR K III-I POPULATION II This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch (1991.25 --> 2000.0) updated 08mar2011 by iur using HIC from VizieR. PM (re?)updated 08mar2011 by iur using Hipparcos 2007 rereduction (I/311) from VizieR. J2000 14 02 31.8460 +09 41 9.94 J2000 (B-V)=0.90+/-0.05, E(B-V)=0.03+/-0.03, TYPE=K2II STAR G III-I POPULATION II This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch (1991.25 --> 2000.0) updated 08mar2011 by iur using HIC from VizieR. PM (re?)updated 08mar2011 by iur using Hipparcos 2007 rereduction (I/311) from VizieR. GSC07817-00861 J2000 14 25 29.9563 -43 38 36.94 J2000 (B-V)=0.76+/-0.05, E(B-V)=0.11+/-0.05, TYPE=G5III STAR G III-I POPULATION II This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch (1991.25 --> 2000.0) updated 08mar2011 by iur using HIC from VizieR. PM (re?)updated 08mar2011 by iur using Hipparcos 2007 rereduction (I/311) from VizieR. J2000 14 36 48.5110 -29 06 46.65 J2000 (B-V)=0.60+/-0.05, E(B-V)=0.10+/-0.05, TYPE=G5III STIS/NUV-MAMA Spectroscopic No No E230M 2707 STIS/NUV-MAMA Spectroscopic No No E230M 2707 STIS/NUV-MAMA Spectroscopic No No E230M 2707 STIS/NUV-MAMA Spectroscopic No No E230M 2707 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd108317 - visit 1 (Tic-Visit :proposal-id 12268 :visit-id "01" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:07.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 435600 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2909 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 134 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "01" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd108317 - visit 2 (Tic-Visit :proposal-id 12268 :visit-id "02" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:11.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 435600 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2909 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 134 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "02" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd108317 - visit 3 (Tic-Visit :proposal-id 12268 :visit-id "03" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:13.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 435600 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2909 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "03" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 134 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "03" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd128279 - visit 1 (Tic-Visit :proposal-id 12268 :visit-id "04" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:16.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 435600 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2924 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "04" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "04" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 134 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "04" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd128279 - visit 2 (Tic-Visit :proposal-id 12268 :visit-id "05" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:18.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 435600 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2924 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "05" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "05" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 134 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "05" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd128279 - visit 3 (Tic-Visit :proposal-id 12268 :visit-id "06" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 435600 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2924 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "06" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "06" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "06" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 134 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "06" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3035 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd126238 - visit 1 (Tic-Visit :proposal-id 12268 :visit-id "07" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 435600 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3008 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "07" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "07" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "07" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 81 :internal-dur-at-end 134 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "07" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd126238 - visit 2 (Tic-Visit :proposal-id 12268 :visit-id "08" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 435600 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3008 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "08" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "08" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "08" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 81 :internal-dur-at-end 134 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "08" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3119 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3341 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd122563 - visit 1 (Tic-Visit :proposal-id 12268 :visit-id "09" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:27.0" :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 348608 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "09" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2909 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "09" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "09" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "09" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. hd122563 - visit 2 (Tic-Visit :proposal-id 12268 :visit-id "10" :proposal-version -1 :trans-version "20100505" :date "08-Mar-2011 13:21:29.0" :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 348608 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12268 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12268 :visit-id "10" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2909 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "10" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "10" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12268 :visit-id "10" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 81 :internal-dur-at-end 396 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) true 4 0