0 Assigned ID: 611 ----- Attempting Submission 1 (Fri Feb 25 20:45:11 GMT 2011) ----- visits 02 & 06 are intended to execute within one HST orbit. Each as its own ORIENT. -1099732687 ----- Attempting Submission 1 (Fri Jul 15 15:44:31 GMT 2011) ----- ----- Attempting Submission 2 (Fri Nov 08 18:59:31 GMT 2013) ----- The warnings for short scan lengths are to be ignored. The target is a tight, 20 mas binary, which is best observed using short scans to optimaize the SNR. The Weight-Watch Program for Subdwarfs The mass-luminosity relation (MLR) is one of the most important map in stellar astronomy. The empirical MLR for dwarfs has been done for many years, but we do not even have enough low metallicity stars, the counterpart of dwarfs, for their MLR. This project of "Weight-Watch Program for Subdwarfs" is to establish such empirical MLR for low metallicity stars. We propose to use HST/FGS1r to finish mapping the visual orbit of one important benchmark low metallicity binary, G006-026. We resolved this double-lined spectroscopic binary in our Cycle 15 HST/FGS program. By combining the SB2 data and our single-epoch HST/FGS1r result, we have estimated their masses and visual orbit, but with errors in excess of 10%. By combining that effort with four additional orbits proposed in Cycle 19, we will reduce the mass errors to 5% (or less) and finish this star's "Weight-Watch program". We will use FGS1r in its high angular resolution observing "TRANS" mode to resolve the tight SB2 binary system G006-026. This system has a semi-major axis of only 23 mas. But given the eccentricity of ~1.5, a favorable viewing angle (little omega), and inclination, carefully timed FGS observations can be executed whereby the projected angular separation of the binary components will exceed a precisely measured ~13 mas on each FGS axis, thereby yielding an accurate component separation and position angle at each observing epoch. The dates of the observations are carefully set to achieve these results. We have updated the phase2 proposal with a change to the observations to be executed in Jan 2014. Using the "coron" option, we have split the orbit into two visits, each with it own "orient", and a relative roll between the visits of 44 degrees. Combining the data from the two different spacecraft orientations should lead to a reliable determination of the binary position angle and angular separation, which has eluded previous visits since the binary was resolved only along one FGS axis, which left the PA and separations with unusable large errors. RESOLVED STELLAR POPULATIONS 12 false false 0.0 0.0 false false false SUPPORTED STAR POPULATION II J2000 J2000 FGS TRANS No F583W /Users/nelan/Desktop/OP-cache/G006-026BC-v01.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. 1320076432000 260.20037822442646 (Tic-Visit :proposal-id 12561 :visit-id "01" :proposal-version -1 :trans-version "20130722" :date "08-Nov-2013 12:28:48.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "05" :si-bright-earth-limb-angle 15.5 :data-volume 0 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12561 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12561 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2870 :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 3244 :pcs-gap 0 ) true 1 0 /Users/nelan/Desktop/OP-cache/G006-026BC-v02.xml Timing link suitability includes constraints ([Group (02 06) Within 0.0 days] [06 After 02 by at most 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. visit 02 and visit 06 are intended to execute within the same HST orbit. Each has its own orient, so there is a roll change between the visits. (Tic-Visit :proposal-id 12561 :visit-id "02" :proposal-version -1 :trans-version "20130722" :date "08-Nov-2013 13:31:00.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "05" :si-bright-earth-limb-angle 15.5 :data-volume 0 :tdrss-contact-duration 0 :coron T ) (Tic-Obset :proposal-id 12561 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12561 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2876 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 958 :low-sky "N" :pcs-visibility 1291 :pcs-gap 0 ) true 1 0 /Users/nelan/Desktop/OP-cache/G006-026BC-v04.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. 1359769347000 74.0 (Tic-Visit :proposal-id 12561 :visit-id "04" :proposal-version -1 :trans-version "20130722" :date "08-Nov-2013 12:28:49.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "05" :si-bright-earth-limb-angle 15.5 :data-volume 0 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12561 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12561 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2870 :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 3244 :pcs-gap 0 ) true 1 0 /Users/nelan/Desktop/OP-cache/G006-026BC-v05.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. 1360745552000 67.0 (Tic-Visit :proposal-id 12561 :visit-id "05" :proposal-version -1 :trans-version "20130722" :date "08-Nov-2013 12:28:56.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "05" :si-bright-earth-limb-angle 15.5 :data-volume 0 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12561 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12561 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2870 :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 3244 :pcs-gap 0 ) true 1 0 /Users/nelan/Desktop/OP-cache/G006-026BC-v06.xml Timing link suitability includes constraints ([Group (02 06) Within 0.0 days] [06 After 02 by at most 0.1 days]) The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12561 :visit-id "06" :proposal-version -1 :trans-version "20130722" :date "08-Nov-2013 13:31:00.0" :trans-errors '(:WARNINGS 1 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "05" :si-bright-earth-limb-angle 15.5 :data-volume 0 :tdrss-contact-duration 0 :coron T ) (Tic-Obset :proposal-id 12561 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12561 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2876 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 958 :low-sky "N" :pcs-visibility 1291 :pcs-gap 0 ) true 1 0