0 Assigned ID: 5239 ----- Attempting Submission 1 (Mon Mar 25 20:13:56 GMT 2024) ----- First submission of Phase II for PID 17707. If any issues arise, I can alter the Phase II as needed. Edit 10/15/24 17:30: Placed all patterns/exposures inside of SEQ NON-INT containers at the request of L. Dressel. Edit 12/15/24 17:05: Slight edits to windows in February for bright object avoidance. Edit 12/18/24 16:08: Slight edits to Jan window for Visit 5 for bright object avoidance. -1331369369 ----- Attempting Submission 1 (Mon Aug 12 18:16:50 GMT 2024) ----- ----- Attempting Submission 2 (Tue Oct 15 21:31:17 GMT 2024) ----- ----- Attempting Submission 3 (Sun Dec 15 22:06:10 GMT 2024) ----- ----- Attempting Submission 4 (Wed Dec 18 21:11:31 GMT 2024) ----- Mutual events of Transneptunian Binaries The population of transneptunian objects (TNOs) is a key tracer of the early solar system's formation and evolution. By looking at the binaries within the TNO population, convincing evidence of planetesimal formation by the Streaming Instability has been found. Further study of these bodies is sure to reveal more insights into the earliest moments of our solar system. One ideal way to study binaries at unprecedented resolution is to observe mutual events, periodic dimming events where one binary component occults/eclipses another. Currently, four TNO binaries are (or will soon be) undergoing mutual events. In this proposal, we ask for 8 orbits to precisely determine the times of these mutual events. Current event timing uncertainties are >24 hours, and are impossible to use for planning observations. Our proposed observations will reduce uncertainties to <4 hours, allowing for precise observations from ground-based telescopes. We will also use state-of-the-art non-Keplerian orbit fitting techniques which will allow for far better predictions. Capturing mutual events will provide immense opportunity for discovery, and are impossible without our proposed observations. Our observations are focused on obtaining precise relative astrometric positions of TNO binary components. Our observations of each target consist of two visits, one scheduled at the time of maximum separation (as indicated by our orbit models), and one scheduled at the time of minimum separation (without going below resolution limits). Observations are conducted with the F350LP filter to maximize SNR while maintaining a minimum PSF FWHM. To obtain maximum exposure time (and prevent memory buffer dumps), most observations are taken with the UVIS2-C512C-SUB aperture subarray, although we finish each visit with full frame UVIS images to get an absolute astrometric measurement of the system for use in heliocentric ephemeris updates. All timing requirements are listed as "betweens" for each visit. These timing requirements allow the highest scientific return from our program. If, however, these requirements are too constraining for telescope scheduling, we can relax them, as needed. PI Proudfoot has extensive experience in understanding the non-Keplerian orbits of TNO binaries. He has published several papers and PI'd several HST programs looking for non-Keplerian orbit effects in TNO binaries. He is also the developer of the PSF fitting tools that will be extensively used for this project. In addition, he is an expert in Bayesian parameter inference, spin-orbit dynamics of TNOs, and planet formation. Co-I Ragozzine is an expert in TNB orbit fitting, with extensive experience in detecting non-Keplerian effects caused by massive moons (like those of Haumea). He has been PI of multiple HST programs focusing on understanding the formation, evolution, and physical characteristics of TNOs. Co-I Grundy is a major expert in HST data reduction and analysis for TNBs. He has led several programs focusing on characterization of individual TNB systems. He maintains an extensive online catalog of TNBs. Solar System Astronomy 0 false false false false false false false false SUPPORTED SOLAR SYSTEM ASTEROID TNO binary with 128 day orbital period TYPE=ASTEROID,A=44.33717130747964,E=0.0957619691154921,I=2.864244613050194 ,O=117.9685872316395,W=74.6756145599299,M=337.1076959588931,EQUINOX=J2000,EPOCH=25-OCT-2015:00:00:00,EpochTimeScale=TDB EARTH SOLAR SYSTEM ASTEROID Binary centaur with 19 day orbit TYPE=ASTEROID,A=38.26666674965798,E=0.5414543038719521,I=2.425277300882227 ,O=351.9106141660436,W=159.3339259602325,M=14.7270708887519,EQUINOX=J2000,EPOCH=09-FEB-2016:00:00:00,EpochTimeScale=TDB EARTH SOLAR SYSTEM ASTEROID TNO binary with 310 day orbit period TYPE=ASTEROID,A=45.42219223977799,E=0.1237573151409189,I=2.895362234339929 ,O=132.5091420103192,W=337.5035420772433,M=55.68419386030521,EQUINOX=J2000,EPOCH=10-FEB-2014:00:00:00,EpochTimeScale=TDB EARTH SOLAR SYSTEM ASTEROID TNO binary with 126 days period TYPE=ASTEROID,A=43.03503239553269,E=0.03368308770101577,I=1.231087312053428 ,O=180.0171013714119,W=71.0111264146927,M=231.0792572076766,EQUINOX=J2000,EPOCH=29-JAN-2017:00:00:00,EpochTimeScale=TDB EARTH WFC3/UVIS Imaging No No F350LP WFC3/UVIS Imaging No No F350LP WFC3/UVIS Imaging No No F350LP WFC3/UVIS Imaging No No F350LP WFC3/UVIS Imaging No No F350LP WFC3/UVIS Imaging No No F350LP WFC3/UVIS Imaging No No F350LP WFC3/UVIS Imaging No No F350LP POS-TARG DITHER 0.173 LINE 0.112 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 1 false POS-TARG DITHER 0.145 LINE false false 2 46.84 WFC3-UVIS-DITHER-LINE 2 false /private/var/folders/tm/bvd5g5k95vq10v9nl69qpjj80000gn/T/OPVisit9183219353968669055.xml Using ephemeris for target 17707-01-KAGARA ephemeris data for target 17707-01-KAGARA does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.282 to 26.089. ephemeris interval: 24.335 to 26.335 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. (Tic-Visit :proposal-id 17707 :visit-id "01" :proposal-version -1 :trans-version "20240627" :date "18-Dec-2024 16:05:46.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 614112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17707 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17707 :visit-id "01" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2602 :al-overhead-at-end 0 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3005 :pcs-gap 0 ) true 1 0 Using ephemeris for target 17707-02-KAGARA ephemeris data for target 17707-02-KAGARA does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.282 to 26.089. ephemeris interval: 24.335 to 26.335 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /private/var/folders/tm/bvd5g5k95vq10v9nl69qpjj80000gn/T/OPVisit12167538270781592659.xml (Tic-Visit :proposal-id 17707 :visit-id "02" :proposal-version -1 :trans-version "20240627" :date "18-Dec-2024 16:05:48.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 614112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17707 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17707 :visit-id "02" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2602 :al-overhead-at-end 0 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3005 :pcs-gap 0 ) true 1 0 Using ephemeris for target 17707-03-TYPHON ephemeris data for target 17707-03-TYPHON does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.282 to 26.089. ephemeris interval: 24.335 to 26.335 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /private/var/folders/tm/bvd5g5k95vq10v9nl69qpjj80000gn/T/OPVisit14887378664587569235.xml (Tic-Visit :proposal-id 17707 :visit-id "03" :proposal-version -1 :trans-version "20240627" :date "18-Dec-2024 16:05:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 614112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17707 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17707 :visit-id "03" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2602 :al-overhead-at-end 0 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3005 :pcs-gap 0 ) true 1 0 Using ephemeris for target 17707-04-TYPHON ephemeris data for target 17707-04-TYPHON does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.282 to 26.089. ephemeris interval: 24.335 to 26.335 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /private/var/folders/tm/bvd5g5k95vq10v9nl69qpjj80000gn/T/OPVisit16181416344191650777.xml (Tic-Visit :proposal-id 17707 :visit-id "04" :proposal-version -1 :trans-version "20240627" :date "18-Dec-2024 16:05:51.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 614112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17707 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17707 :visit-id "04" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2602 :al-overhead-at-end 0 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3005 :pcs-gap 0 ) true 1 0 Using ephemeris for target 17707-05-LOGOS ephemeris data for target 17707-05-LOGOS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.282 to 26.089. ephemeris interval: 24.335 to 26.335 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /private/var/folders/tm/bvd5g5k95vq10v9nl69qpjj80000gn/T/OPVisit13834380011102456056.xml Logos' maximum separation window is unschedulable. Instead, this visit will target an alternative window (closer to minimum separation) that will provide similarly strong orbital constraints. If windows are too narrow, we are able to relax constraints with only slight decrease in science value. (Tic-Visit :proposal-id 17707 :visit-id "05" :proposal-version -1 :trans-version "20240627" :date "18-Dec-2024 16:05:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 595808 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17707 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17707 :visit-id "05" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2472 :al-overhead-at-end 0 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3005 :pcs-gap 0 ) true 1 0 Using ephemeris for target 17707-06-LOGOS ephemeris data for target 17707-06-LOGOS does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.282 to 26.089. ephemeris interval: 24.335 to 26.335 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /private/var/folders/tm/bvd5g5k95vq10v9nl69qpjj80000gn/T/OPVisit5494056090863635816.xml If windows are too narrow, we are able to relax constraints with only slight decrease in science value. (Tic-Visit :proposal-id 17707 :visit-id "06" :proposal-version -1 :trans-version "20240627" :date "18-Dec-2024 16:05:34.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 595808 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17707 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17707 :visit-id "06" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2472 :al-overhead-at-end 0 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3005 :pcs-gap 0 ) true 1 0 Using ephemeris for target 17707-07-2001XR254 ephemeris data for target 17707-07-2001XR254 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.282 to 26.089. ephemeris interval: 24.335 to 26.335 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /private/var/folders/tm/bvd5g5k95vq10v9nl69qpjj80000gn/T/OPVisit5116780962581900025.xml 1733496712000 286.1176259328422 (Tic-Visit :proposal-id 17707 :visit-id "07" :proposal-version -1 :trans-version "20240627" :date "18-Dec-2024 16:05:52.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 614112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17707 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17707 :visit-id "07" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2602 :al-overhead-at-end 0 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3005 :pcs-gap 0 ) true 1 0 Using ephemeris for target 17707-08-2001XR254 ephemeris data for target 17707-08-2001XR254 does not cover planning interval. Physical constraints are assumed to be unschedulable outside of the ephemeris data. Planning interval: 24.282 to 26.089. ephemeris interval: 24.335 to 26.335 The scheduling data was generated by CASM 32.1.3. CASM was run in Phase II mode. /private/var/folders/tm/bvd5g5k95vq10v9nl69qpjj80000gn/T/OPVisit2893298275346882614.xml 1731051000000 278.2319679444161 (Tic-Visit :proposal-id 17707 :visit-id "08" :proposal-version -1 :trans-version "20240627" :date "18-Dec-2024 16:05:54.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 614112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17707 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17707 :visit-id "08" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2602 :al-overhead-at-end 0 :internal-dur-at-end 668 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3005 :pcs-gap 0 ) true 1 0