Determining an accurate position for a submm galaxy (SMG) is the crucial step that enables us to move from the basic properties of an SMG sample - source counts and 2-D clustering - to an assessment of their detailed, multi-wavelength properties, their con

Identi cationofsubmillimetregalaxiesintheSHADESSourceCatalogue

15

Figure9.S24µm/S8µmversusS8µm/S4.5µmcolour-colourdiagramforafaint24-µm-selectedsampleof4,457galaxies(dots)with4.5-and8.0-µmdetections.Robustlyidenti edSMGsareplottedas lledcirclesandlesssecurelyidenti edSMGsasopencircles.Arepresentativeerrorbarisshown,topright.TheredshifttracksofArp220,Mrk231andNGC6240areshown(adoptingSEDsfromRigopoulouetal.1999andSpoonetal.2004),withsquarestoindicateredshift.Hatchedregionsindicateregionsofcolour-colourspacewhereonemightexpectto ndthemostdistantSMGs.

BorysC.,ScottD.,ChapmanS.,HalpernM.,NandraK.,PopeA.,2004,MNRAS,355,485

CarilliC.L.,YunM.S.,1999,ApJ,513,L13CarilliC.L.,YunM.S.,2000,ApJ,530,618

ChapmanS.C.,LewisG.F.,ScottD.,BorysC.,RichardsE.A.,2002,ApJ,570,557

ChapmanS.C.,BlainA.W.,IvisonR.J.,SmailI.,2003,Nature,422,695

ChapmanS.C.,SmailI.,WindhorstR.,MuxlowT.,IvisonR.J.,2004,ApJ,611,732

ChapmanS.C.,BlainA.W.,SmailI.,IvisonR.J.,2005,ApJ,622,772

ClementsD.etal.,2004,MNRAS,351,611CondonJ.J.,1997,PASP,109,166

CoppinK.,HalpernM.,ScottD.,BorysC.,ChapmanS.,2005,MNRAS,357,1022

CoppinK.etal.,2006,MNRAS,372,1621(PaperII)

DannerbauerH.,LehnertM.D.,LutzD.,TacconiL.,BertoldiF.,CarilliC.,GenzelR.,MentenK.M.,2004,ApJ,606,664DonleyJ.L.,RiekeG.H.,RigbyJ.R.,P´erez-Gonz´alezP.G.,2005,ApJ,634,169

DownesA.J.B.,PeacockJ.A.,SavageA.,CarrieD.R.,1986,MN-c0000RAS,MNRAS000,000–000

RAS,218,31

DrakeC.L.,McGregorP.J.,DopitaM.A.,vanBreugelW.J.M.,2003,AJ,126,2237

DuncanW.D.,SandellG.,RobsonE.I.,AdeP.A.R.,Grif nM.J.,1990,MNRAS,243,126

DunlopJ.S.,PeacockJ.A.,SavageA.,LillyS.J.,HeasleyJ.N.,Si-monA.J.B.,1989,MNRAS,238,1171DunlopJ.S.etal.,2004,MNRAS,350,769

DunneL.,ClementsD.L.,EalesS.A.,2000,MNRAS,319,813EalesS.A,LillyS.J.,GearW.K.,DunneL.,BondJ.R.,HammerF.,LeF`evreO.,CramptonD.,1999,ApJ,515,518

EalesS.,LillyS.,WebbT.,DunneL.,GearW.,ClementsD.,YunM.,2000,AJ,120,2244

EalesS.,BertoldiF.,IvisonR.J.,CarilliC.,DunneL.,OwenF.,2003,MNRAS,344,169

EgamiE.etal.,2004,ApJS,154,130FoxM.J.etal.,2002,MNRAS,331,839

FrayerD.T.,IvisonR.J.,ScovilleN.Z.,YunM.,EvansA.S.,SmailI.,BlainA.W.,KneibJ.-P.,1998,ApJ,506,L7FrayerD.T.etal.,1999,ApJ,514,L13FrayerD.T.etal.,2004,ApJS,154,137

GearW.K.,LillyS.J.,StevensJ.A.,ClementsD.L.,WebbT.M.,