FGS Science During NSSC-1 Flight Software Upgrade

FGS Science During NSSC-1 Flight Software Upgrade In early March the HST NSSC-1 computer's flight software will be upgraded. For a period of several hours the only HST instrument available for scientific observations will be FGS1r. We propose making excellent use of otherwise idle HST time by observing two O-star binary systems, HD 93129A & 15 Mon, to determine the relative masses of the components, and obtaining a late-epoch astrometric visit to the metal poor subgiant HD 140283 for a more accurate parallax and age determination. For each object, the data will be combined with previous FGS observations and will significantly increase the temporal baseline, and hence accuracy, over which the astrometric measurements are made.

FGSr1 is used in Transfer mode to observe HD 93129A, HD 47839, and HD 38666. Multiple scans are obtained with the F5ND attenuator in place. In addition, POS mode exposures are obtained for the binary stars HD 923129A and HD 47839, along with nearby reference stars in each of the fields. The HD 140283 observations include only POS mode exposures of HD 140283 and field stars. HOT STARS 0 false 0.0 0.0 false false false false SUPPORTED STAR OF J2000 10 43 57.5000 -59 32 53.00 J2000 STAR OF This is HD 93129A, but with a faked magnitude (10.3) which will cause the K1x, K1y POS mode acquisition parameters to take on values appropriate for acquiring this resolved binary star (which has reduced fringe amplitudes due to it binary nature). However, the exposures have the optional parameter FESTIME= 0.025 seconds, as it should be. J2000 10 43 57.5000 -59 32 53.00 J2000 STAR OF J2000 06 38 13.4290 +09 56 37.02 J2000 STAR OF J2000 05 44 8.3240 -32 19 27.47 J2000 STAR POPULATION II J2000 15 43 3.1000 -10 56 0.59 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC GSC5601.00234 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC GSC5601.00122 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC GSC5601.00564 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC GSC5601.00218 J2000 00 00 0.0000 +00 00 0.00 J2000 CALIBRATION ASTROMETRIC GSC5601.00722 J2000 00 00 0.0000 +00 00 0.00 J2000 FGS TRANS No F5ND FGS POS No F5ND FGS TRANS No F5ND FGS POS No F5ND FGS TRANS No F5ND FGS POS No F5ND FGS POS No F5ND The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12441 :visit-id "01" :proposal-version -1 :trans-version "20100505" :date "10-Feb-2011 12:01:48.0" :trans-errors '(:WARNINGS 0 :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 12441 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12441 :visit-id "01" :orbit-number 1 :pcs-time 241 :si-vis-utilization 2793 :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 3216 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12441 :visit-id "02" :proposal-version -1 :trans-version "20100505" :date "10-Feb-2011 12:12:40.0" :trans-errors '(:WARNINGS 0 :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 12441 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12441 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2658 :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 3125 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12441 :visit-id "03" :proposal-version -1 :trans-version "20100505" :date "10-Feb-2011 12:16:25.0" :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 12441 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12441 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2663 :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 3275 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12441 :visit-id "04" :proposal-version -1 :trans-version "20100505" :date "10-Feb-2011 12:16:44.0" :trans-errors '(:WARNINGS 0 :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 12441 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12441 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2737 :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 3245 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12441 :visit-id "05" :proposal-version -1 :trans-version "20100505" :date "10-Feb-2011 12:16:52.0" :trans-errors '(:WARNINGS 0 :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 12441 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12441 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2737 :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 3245 :pcs-gap 0 ) true 1 0