Searching for Intermediate Mass Black Holes in Globular Clusters via Proper Motions

Searching for Intermediate Mass Black Holes in Globular Clusters via Proper Motions .The unambiguous detection of an intermediate mas black hole (IMBH) in a globular star cluster would be a major achievement for the Hubble Space Telescope. It is critical to know whether or not IMBHs exist in the centers of clusters in order to understnd the dynamical evolution of dense stellar systems. Also, n IMBH detection would prove the existence of BHs in an entirely new mass range. Observationally, the search has been hampered by the low number of stars with known velocities in the central few arcseconds. This limits measurements of the stellar velocity dispersion in the region where the gravitational influence of any IMBH would be felt. Existinting IMBH claims i the literature have all been called into question, and have all been based on line-of-sight velocities from spectroscopy. In cycle 13, we obtained ACS/HRC observations for 5 nearby Galactic globular clusters for a new proper motion study. Here, we request WFPC2/PC observations of these clusters, all of which are observable in Feb-May 2009. This 4 year baseline will allow us to measure the proper motions of stars into the very center of each cluster, and either detect or place firm constraints on the presence of an IMBH. In addition, we will determine whether or not the clusters rotate or show any anisotropy in their motions. Our small (<75 orbit) program meets the critiera of addressing high impact science (IMBH detection) using innovative methods (proper motions).

The success of this project hinges on accurate astrometric measurements for a large number of stars in the centers of five crowded Galactic globular clusters. We have previously obtained first epoch ACS/HRC (GO-10401) and second epoch WFPC2/PC (10841) images. This program will obtain third epoch WFPC2/PC images which will allow us to directly constrain the presence of intermediate mass black holes in our target clusters. We found that the filter and exposure times used in the 2nd epoch observations were ideal, and use the same values as in our 10841 program. We also use gain=15. We have checked the images taken in our previous 10841 program, which confirms that the clusters are well centered in the previous epoch, and so we use the same coordinates here. In this program, we dedicate 8 orbits to each cluster, broken into 4 visits of 2 orbits each. In order to best characterize the distortions across the field, we have constructed a dither pattern which moves the center of the cluster around in a circle with a radius of 100 pixels. This will allow us to sample different places on the detector, enabling us to randomize any systematic errors in distortion. The 100 pixel radius was chosen as a compromise between large-scale dithers and not losing too much of the cluster off the CCD for any given pointing. We will further randomize the positions of each star by observing each of the 4 visits at a different orientation. RESOLVED STELLAR POPULATIONS 12 false 0.0 0.0 false false false false false SUPPORTED STELLAR CLUSTER GLOBULAR CLUSTER J2000 21 40 22.0300 -23 10 44.60 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 21 40 22.0300 -23 10 44.60 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 21 40 22.0300 -23 10 44.60 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 21 40 22.0300 -23 10 44.60 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 18 43 12.6400 -32 17 30.80 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 18 43 12.6400 -32 17 30.80 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 18 43 12.6400 -32 17 30.80 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 18 43 12.6400 -32 17 30.80 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 01 03 14.2700 -70 50 53.60 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 01 03 14.2700 -70 50 53.60 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 01 03 14.2700 -70 50 53.60 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 01 03 14.2700 -70 50 53.60 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 18 23 40.6900 -30 21 38.80 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 18 23 40.6900 -30 21 38.80 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 18 23 40.6900 -30 21 38.80 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 18 23 40.6900 -30 21 38.80 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 21 29 58.3000 +12 10 1.00 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 21 29 58.3000 +12 10 1.00 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 21 29 58.3000 +12 10 1.00 J2000 STELLAR CLUSTER GLOBULAR CLUSTER J2000 21 29 58.3000 +12 10 1.00 J2000 ACS/HRC Imaging No No F330W ACS/HRC Imaging No No F330W ACS/HRC Imaging No No F330W ACS/HRC Imaging No No F435W ACS/HRC Imaging No No F435W The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 10 - 13 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "10" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 448160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "10" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2845 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3321 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "10" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2820 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3321 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 10 - 13 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "11" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 448160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "11" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2845 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3321 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "11" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2820 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3321 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 10 - 13 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "12" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:26.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 448160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "12" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2845 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3321 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "12" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2820 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3321 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 10 - 13 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "13" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 448160 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "13" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2845 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3321 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "13" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2820 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3321 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 20 - 23 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "20" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "20" :obset-id "20" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "20" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "20" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 20 - 23 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "21" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:32.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "21" :obset-id "21" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "21" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "21" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 20 - 23 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "22" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "22" :obset-id "22" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "22" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "22" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 20 - 23 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "23" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:36.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "23" :obset-id "23" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "23" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "23" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 30 - 33 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "30" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "30" :obset-id "30" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "30" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "30" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 30 - 33 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "31" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:41.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "31" :obset-id "31" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "31" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "31" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 30 - 33 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "32" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:43.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "32" :obset-id "32" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "32" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "32" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 30 - 33 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "33" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:45.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "33" :obset-id "33" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "33" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "33" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3152 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 40 - 43 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "40" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:47.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "40" :obset-id "40" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "40" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3147 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "40" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3147 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 40 - 43 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "41" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "41" :obset-id "41" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "41" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3147 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "41" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3147 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 40 - 43 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "42" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "42" :obset-id "42" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "42" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3147 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "42" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3147 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 40 - 43 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "43" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:53.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "43" :obset-id "43" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "43" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2485 :al-overhead-at-end 155 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3147 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "43" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2460 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3147 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 50 - 53 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "50" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:55.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 537792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "50" :obset-id "50" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "50" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2665 :al-overhead-at-end 95 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "50" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2640 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 50 - 53 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "51" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:49:59.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 537792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "51" :obset-id "51" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "51" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2665 :al-overhead-at-end 95 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "51" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2640 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 50 - 53 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "52" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:50:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 537792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "52" :obset-id "52" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "52" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2665 :al-overhead-at-end 95 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "52" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2640 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. Please try and schedule visits 50 - 53 at different orients. (Tic-Visit :proposal-id 11988 :visit-id "53" :proposal-version -1 :trans-version "20080807" :date "26-Jan-2009 22:50:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 537792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11988 :visit-id "53" :obset-id "53" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11988 :visit-id "53" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2665 :al-overhead-at-end 95 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11988 :visit-id "53" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2640 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) true 2 0