JWST Proposal 2550 (Created: Tuesday, March 30, 2021 at 7:23:07 PM Eastern Standard Time) - Overview
2550 - The First Near-IR Spectroscopic Survey of Neptune Trojans Cycle: 1, Proposal Category: GO
INVESTIGATORS Name Institution E-Mail Larissa Markwardt (PI) University of Michigan [email protected] Dr. Hsing Wen Lin (CoI) University of Michigan [email protected] Prof. David Gerdes (CoI) University of Michigan [email protected] Prof. Renu Malhotra (CoI) University of Arizona [email protected] Kevin Napier (CoI) University of Michigan [email protected] Dr. Fred Adams (CoI) University of Michigan [email protected]
OBSERVATIONS Folder Observation Label Observing Template Science Target Observation Folder 1 NIRSpec IFU:2008 LC NIRSpec IFU Spectroscopy (2) 2008LC18 18 3 NIRSpec IFU: 2011 W NIRSpec IFU Spectroscopy (6) 2011WG157 G157 5 NIRSpec IFU: 2013 K NIRSpec IFU Spectroscopy (4) 2013KY18 Y18 7 NIRSpec IFU: 2011 H NIRSpec IFU Spectroscopy (3) 2011HM102 M102 10 NIRSpec IFU: 2013 V NIRSpec IFU Spectroscopy (5) 2013VX30 X30 11 NIRSpec IFU: 2006 RJ NIRSpec IFU Spectroscopy (12) 2006RJ103 103 12 NIRSpec IFU: 2007 VL NIRSpec IFU Spectroscopy (8) 2007VL305 305
1 JWST Proposal 2550 (Created: Tuesday, March 30, 2021 at 7:23:07 PM Eastern Standard Time) - Overview Folder Observation Label Observing Template Science Target 13 NIRSpec IFU: 2011 SO NIRSpec IFU Spectroscopy (7) 2011SO277 277 14 NIRSpec IFU: 2010 TS NIRSpec IFU Spectroscopy (11) 2010TS191 191
ABSTRACT Trojan asteroids, which librate around a planet’s L4 or L5 point, are thought to be remnants of our primordial disk as the strong 1:1 resonance means they can be stable on order the age of the Solar System. This resonance relationship means that Trojans are also tied to the evolution of their planet, meaning that giant planet Trojans can also be used to constrain planetary migration models. Neptune Trojans (NTs) are a particularly puzzling population; while they are expected to have a mix of red and ultra-red surfaces, only one ultra-red NT has been discovered to date. It is possible that collisions between NTs and Plutinos shifted the NT colors blueward over time, but colors are limited in their capacity to answer this question as a variety of processes and compositions can affect the colors of planetary bodies, often in ways that are indistinguishable from each other. Near-IR spectra can provide more information about these planetary surfaces as many broad molecular absorption features occur at these wavelengths. In particular, these features can be used to measure ice composition, ice irradiation products, surface grain size, and the ice phase. Therefore, we propose to take the first near-IR spectroscopic survey of NTs in order to study the ultra-red NT's surface in more detail, compare L4 and L5 NTs, and compare unstable NTs to Centaurs. JWST is vital to this program as these objects are too faint to take reasonable spectra using ground-based facilities. Regardless of the exact outcomes, these measurements would lead to a better understanding of the formation and evolution of NTs and the giant planets.
OBSERVING DESCRIPTION The requested observations are to take Near-IR reflectance spectra of 9 Neptune Trojans. We will be using the NIRSpec IFU with the PRISM for all of the targets. We will not be doing any target aquisition, instead doing a blind pointing into the IFU FOV; the positional uncertainties for all of our targets + the pointing uncertainty will be less than 1.5" at the time of observation. We will also be using a 2-point nod dither pattern and the NRSIRS2RAPID readout pattern for all of our targets. All of our targets are distant Solar System objects, meaning they will be point sources and will not exceed the angular rate of motion limit. Our list of targets (with overall science time) is as follows: - 2008 LC18 - 3.24 hrs - 2011 WG157 -0.8 hrs - 2013 KY18 - 0.8 hrs - 2011 HM102 - 2 hrs
2 JWST Proposal 2550 (Created: Tuesday, March 30, 2021 at 7:23:07 PM Eastern Standard Time) - Overview - 2013 VX30 - 1 hrs - 2006 RJ103 - 0.8 hrs - 2007 VL305 - 1.2 hrs - 2011 SO277 - 1.2 hrs - 2010 TS191 - 1.6 hrs
3 Proposal 2550-TargetsTheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Solar System Targets Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (8) Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (7) Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (6) Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (5) Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (4) Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (3) Extended=Unknown Description=Neptune Trojan Comments: Keyword=Asteroid (2) # 2008LC18 Name 2007VL305 2011SO277 2011WG157 2013VX30 2013KY18 2011HM102 2014:00:00:00,EpochTimeScale=TDB 8,EQUINOX=J2000,EPOCH=27-MAY- 64498,W=272.1220317711166,M=268.462456114411 81181551389,I=6.666842318991241,O=84.379298024 TYPE=ASTEROID,A=30.09195046629077,E=0.1199 2015:00:00:00,EpochTimeScale=TDB 921,EQUINOX=J2000,EPOCH=30-AUG- 8268076,W=150.8564999915705,M=29.76256592484 4695180988048,I=29.40338876077627,O=100.984958 TYPE=ASTEROID,A=30.09129189747453,E=0.0807 2009:00:00:00,EpochTimeScale=TDB 557,EQUINOX=J2000,EPOCH=31-AUG- 5979223,W=4.899676951511355,M=169.8904076596 6797229116722,I=27.50484015385932,O=88.5256719 TYPE=ASTEROID,A=30.05039893570054,E=0.0795 Level 1 2015:00:00:00,EpochTimeScale=TDB 181,EQUINOX=J2000,EPOCH=16-JUN- 3176001,W=218.3894487958658,M=4.352123802605 9636971777168,I=28.14946912075748,O=188.681146 TYPE=ASTEROID,A=30.04056798197746,E=0.0635 2013:00:00:00,EpochTimeScale=TDB 4316,EQUINOX=J2000,EPOCH=27-AUG- 40528006,W=114.2219980449608,M=151.613414690 30811445308824,I=9.639190126377523,O=113.62368 TYPE=ASTEROID,A=30.22265998181066,E=0.0091 2013:00:00:00,EpochTimeScale=TDB 394,EQUINOX=J2000,EPOCH=02-AUG- 9383424,W=208.6267604521326,M=208.6821859568 0723477878031,I=22.30505410483727,O=352.197666 TYPE=ASTEROID,A=30.15115751243756,E=0.0248 2016:00:00:00,EpochTimeScale=TDB 667,EQUINOX=J2000,EPOCH=01-NOV- 0907664,W=216.1479151673698,M=353.9481301936 3095417969938,I=31.31460868473241,O=192.592491 TYPE=ASTEROID,A=30.00653186954801,E=0.0815 Level 2 4 Level 3 Proposal 2550 - Targets - The First Near-IR Spectroscopic Survey of Neptune Trojans (11) 2010TS191 TYPE=ASTEROID,A=30.07317861653429,E=0.0485 0532908303209,I=6.562466790819702,O=129.685361 9331111,W=300.6148163643498,M=336.2465379252 896,EQUINOX=J2000,EPOCH=24-JUN- 2014:00:00:00,EpochTimeScale=TDB Comments: Keyword=Asteroid Description=Neptune Trojan Extended=Unknown (12) 2006RJ103 TYPE=ASTEROID,A=30.04482399069547,E=0.0317 9587760688634,I=8.161556879320241,O=120.965271 3533018,W=25.53486982632182,M=253.7833917219 978,EQUINOX=J2000,EPOCH=25-DEC- 2014:00:00:00,EpochTimeScale=TDB Comments: Keyword=Asteroid Description=Neptune Trojan Extended=Unknown
5 Proposal 2550-Observation1TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2008LC18FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=Unknown Description=Neptune Trojan Comments: Keyword=Asteroid (2) # (Visit 1:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation1:NIRSpecIFU:2008LC18 2008LC18 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2009:00:00:00,EpochTimeScale=TDB 557,EQUINOX=J2000,EPOCH=31-AUG- 5979223,W=4.899676951511355,M=169.8904076596 6797229116722,I=27.50484015385932,O=88.5256719 TYPE=ASTEROID,A=30.05039893570054,E=0.0795 Level 1 50 Groups/Int p Integrations/Ex Size 8 Leakcal false Level 2 6 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 16 Integrations Total 11904.534 Time Total Exposure Points Wed Mar3100:23:07GMT2021 61740 Wkbk.Calc ID ETC Proposal 2550-Observation3TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2011WG157FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (6) # (Visit 3:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation3:NIRSpecIFU:2011WG157 2011WG157 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2013:00:00:00,EpochTimeScale=TDB 394,EQUINOX=J2000,EPOCH=02-AUG- 9383424,W=208.6267604521326,M=208.6821859568 0723477878031,I=22.30505410483727,O=352.197666 TYPE=ASTEROID,A=30.15115751243756,E=0.0248 Level 1 50 Groups/Int p Integrations/Ex Size 2 Leakcal false Level 2 7 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 4 Integrations Total 2976.134 Time Total Exposure Points Wed Mar3100:23:07GMT2021 Wkbk.Calc ID ETC Proposal 2550-Observation5TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2013KY18FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (4) # (Visit 5:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation5:NIRSpecIFU:2013KY18 2013KY18 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2014:00:00:00,EpochTimeScale=TDB 8,EQUINOX=J2000,EPOCH=27-MAY- 64498,W=272.1220317711166,M=268.462456114411 81181551389,I=6.666842318991241,O=84.379298024 TYPE=ASTEROID,A=30.09195046629077,E=0.1199 Level 1 50 Groups/Int p Integrations/Ex Size 2 Leakcal false Level 2 8 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 4 Integrations Total 2976.134 Time Total Exposure Points Wed Mar3100:23:07GMT2021 Wkbk.Calc ID ETC Proposal 2550-Observation7TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2011HM102FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (3) # (Visit 7:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation7:NIRSpecIFU:2011HM102 2011HM102 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2015:00:00:00,EpochTimeScale=TDB 921,EQUINOX=J2000,EPOCH=30-AUG- 8268076,W=150.8564999915705,M=29.76256592484 4695180988048,I=29.40338876077627,O=100.984958 TYPE=ASTEROID,A=30.09129189747453,E=0.0807 Level 1 50 Groups/Int p Integrations/Ex Size 5 Leakcal false Level 2 9 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 10 Integrations Total 7440.334 Time Total Exposure Points Wed Mar3100:23:07GMT2021 Wkbk.Calc ID ETC Proposal 2550-Observation10TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2013VX30FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (5) # (Visit 10:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation10:NIRSpecIFU:2013VX30 2013VX30 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2016:00:00:00,EpochTimeScale=TDB 667,EQUINOX=J2000,EPOCH=01-NOV- 0907664,W=216.1479151673698,M=353.9481301936 3095417969938,I=31.31460868473241,O=192.592491 TYPE=ASTEROID,A=30.00653186954801,E=0.0815 Level 1 60 Groups/Int p Integrations/Ex Size 2 Leakcal false 10 Level 2 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 4 Integrations Total 3559.689 Time Total Exposure Points Wed Mar3100:23:07GMT2021 Wkbk.Calc ID ETC Proposal 2550-Observation11TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2006RJ103FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=Unknown Description=Neptune Trojan Comments: Keyword=Asteroid (12) # (Visit 11:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation11:NIRSpecIFU:2006RJ103 2006RJ103 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2014:00:00:00,EpochTimeScale=TDB 978,EQUINOX=J2000,EPOCH=25-DEC- 3533018,W=25.53486982632182,M=253.7833917219 9587760688634,I=8.161556879320241,O=120.965271 TYPE=ASTEROID,A=30.04482399069547,E=0.0317 Level 1 50 Groups/Int p Integrations/Ex Size 2 Leakcal false 11 Level 2 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 4 Integrations Total 2976.134 Time Total Exposure Points Wed Mar3100:23:07GMT2021 Wkbk.Calc ID ETC Proposal 2550-Observation12TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2007VL305FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (8) # (Visit 12:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation12:NIRSpecIFU:2007VL305 2007VL305 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2015:00:00:00,EpochTimeScale=TDB 181,EQUINOX=J2000,EPOCH=16-JUN- 3176001,W=218.3894487958658,M=4.352123802605 9636971777168,I=28.14946912075748,O=188.681146 TYPE=ASTEROID,A=30.04056798197746,E=0.0635 Level 1 50 Groups/Int p Integrations/Ex Size 3 Leakcal false 12 Level 2 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 6 Integrations Total 4464.2 Time Total Exposure Points Wed Mar3100:23:07GMT2021 Wkbk.Calc ID ETC Proposal 2550-Observation13TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2011SO277FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=NO Description=Neptune Trojan Comments: Keyword=Asteroid (7) # (Visit 13:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation13:NIRSpecIFU:2011SO277 2011SO277 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2013:00:00:00,EpochTimeScale=TDB 4316,EQUINOX=J2000,EPOCH=27-AUG- 40528006,W=114.2219980449608,M=151.613414690 30811445308824,I=9.639190126377523,O=113.62368 TYPE=ASTEROID,A=30.22265998181066,E=0.0091 Level 1 50 Groups/Int p Integrations/Ex Size 3 Leakcal false 13 Level 2 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 6 Integrations Total 4464.2 Time Total Exposure Points Wed Mar3100:23:07GMT2021 Wkbk.Calc ID ETC Proposal 2550-Observation14TheFirstNear-IRSpectroscopicSurveyofNeptuneTrojans Special Requirements Spectral Elements Dithers Template Solar System Targets Diagnostics Observation DEFAULT WINDOW:ANGULAR RATE2010TS191FROMJWSTLESSTHAN0.03 1 # 1 # NONE TA Method Extended=Unknown Description=Neptune Trojan Comments: Keyword=Asteroid (11) # (Visit 14:1)Warning(Form):OverheadsareprovisionaluntiltheVisitPlanner hasbeenrun. Observing Template:NIRSpecIFUSpectroscopy Diagnostic Status:Warning Proposal 2550,Observation14:NIRSpecIFU:2010TS191 2010TS191 Name PRISM/CLEAR Grating/Filter D NRSIRS2RAPI Pattern Readout 2-POINT-NOD Dither Type 2014:00:00:00,EpochTimeScale=TDB 896,EQUINOX=J2000,EPOCH=24-JUN- 9331111,W=300.6148163643498,M=336.2465379252 0532908303209,I=6.562466790819702,O=129.685361 TYPE=ASTEROID,A=30.07317861653429,E=0.0485 Level 1 50 Groups/Int p Integrations/Ex Size 4 Leakcal false 14 Level 2 Dither Starting Point true Autocal NONE 2 Total Dithers Number ofPoints Level 3 8 Integrations Total 5952.267 Time Total Exposure Points Wed Mar3100:23:07GMT2021 Wkbk.Calc ID ETC