The LSST Deep-Drilling Fields: White Papers and Science Council Selected Fields W ... · 2016. 10....
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1 LSST2016 •8/15/2016 LSST2016 •8/15/2016 The LSST Deep-Drilling Fields: White Papers and Science Council Selected Fields W. Niel Brandt Penn State University LSST2016 August 15, 2016
Transcript of The LSST Deep-Drilling Fields: White Papers and Science Council Selected Fields W ... · 2016. 10....
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TheLSSTDeep-DrillingFields:WhitePapersandScienceCouncilSelectedFields
W.NielBrandtPennStateUniversity
LSST2016August15,2016
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ScopeofMini-Surveys
Inaddition toexecuting themainsurvey,theLSSTobservingprogramwillinclude aselection ofMini-Surveys.
These haveawiderangeofscience goalsandtotalexposures.Theyinclude theDeep-DrillingFields(DDF)aswellastheNorthEclipticSpur(NES),theSouthCelestial Pole(SCP),theGalacticPlane(GP),andseveralotherprograms.
Thebaseline expectation isthattheMini-Surveyswillutilizeupto~ 10%oftheLSSTtime,butthefinalpercentage isnotyetdetermined. Thefinaldecisionwillbeinformedbytheongoingcommunity-based studyofobservingstrategy.
ScienceplansfortheseMini-Surveysstill beingdeveloped, andtheselection ofMini-Surveysisstill largelyopen.Plentyofopportunitytogetinvolvedifinterested!
Discussions expected tocontinueuptoandbeyondfirstlight.
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WhitePapers
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LSSTDeep-DrillingFieldWhitePapers
MembersoftheLSSTDeep-Drilling InterestGroup(DDIG; ~75members)preparedasetofeightsciencewhitepapers.
These arenotbindinginanyway,buttheydorepresentsomegreatideasfromthecommunity.Additionalwhitepapersarestillwelcomed.
Thesewhitepapersfollowauniformformatanddothefollowing:
1. Providescience goals2. Suggestfieldsforobservation3. Describetheneeded LSSTobservations4. Demonstrate theneedforLSSTandforDeepDrilling5. Assess feasibility issues6. Highlightareasneedingadditional workandobservations
Publiclyavailablefromhttps://project.lsst.org/content/whitepapers32012
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LSSTDeep-DrillingFieldWhitePapers
SolarSystem
GalacticandLocalGroupDistantExtragalactic
Thankyougreatlytothosewhodeveloped thesewhitepapers!
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DeepDrillingofaNearbyGalaxyCluster
Intergalacticandgalactictransients,dwarfgalaxies,LSBfeatures.
Fergusonetal.whitepaper
FornaxCluster
LSSTFOV
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LMCandSMC:AFewScienceGoals
High-cadence observations ofLMCandSMC(and47Tuc)tocharacterizebinary,pulsating, eruptive,andflaringvariables.
Assessmetallicity andageeffectsuponvariabilitybycomparingpopulations inLMC,SMC,galacticclusters,andGalactichalo.
LMC
SMC 47Tuc
Szkody etal.whitepaper
LSSTLSST
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BasicProposedPropertiesofanExtragalactic“Blank-Field”DDF
5300-13800visitsperbandover~10yearperiod.265sequences of20-52exposures perband.Cost isabout335hoursforeachsuchfield.
Approx.finalco-addeddepths:u =28.5,g =28.7,r =28.9,i =28.4,z =28.0,y =27.0.Detections for~3x106 galaxiesand~40,000AGNs.
Cadence shouldenableoptimal supernova,AGN,transientstudies.
Measuretheproperties andclustering ofsamples ofhigh-redshift galaxies andAGNstoofainttobedetected inthemainsurvey.
Utilizethedensetime samplingtoidentifyandstudysupernovae,AGNs,transients,andstronglenses.
Testandimprovephotometric redshifts neededformainsurvey.
Assess shearsystematics andtheeffectsoflensingmagnification uponLSS.
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DDFsSelectedbytheScienceCouncil
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PromptSelectionofFour“Blank-Field”DDFs
TheLSSTScienceCouncil, inconsultation withtheDDIG,chosefour“blank-field” DDFsforobservationbyLSST.Thiswasdone in2011-2012.
Thiswasseparatefromthewhite-paper activities; i.e.,thewhitepaperswerenot“proposals”totheScienceCouncil thatwerejudgedcompetitively.
TheScienceCouncil’smotivationwascommunityservice. Enablespreparatoryobservations; e.g.,thosebyobservatorieswithlimited lifetimes.
Spitzerobservationsnowongoingforthreeofthefields.XMM-Newton observationsnowongoingforpartofXMM-LSSfield,andmoreX-raycoverageproposed forthese fields.
Asidefromthefieldpositions, nothingelse decidedaboutthesefields.
TheLSSTandbroadercommunities willbeengaged,onalongertimescale, inworkingoutthebestchoices ofLSSTcadence,filters, filterbalance, dithering,etc.forthese fourfields.
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TheFourSelectedDDFs:MultiwavelengthCoverage
ELAIS-S1XMM-LSS
NewSpitzer
NewXMM-Newtonongoing
ExtendedCDF-S
COSMOS
NewSpitzer
NewSpitzer
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TheFourSelectedDDFsontheSky
UltimatelywillwanttobroadenRAdistributionofextragalacticDDFsforefficientobserving.
Someadditionalfields suggested.
SomepossibleDDFs(alreadyselectedinred)
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ThursdaySessionSchedule
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TheEnd
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