?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=RadioLensfit%3A+Bayesian+weak+lensing+measurement+in+the+visibility+domain&rft.creator=Rivi%2C+M&rft.creator=Miller%2C+L&rft.creator=Makhathini%2C+S&rft.creator=Abdalla%2C+FB&rft.description=Observationally%2C+weak+lensing+has+been+served+so+far+by+optical+surveys+due+to+the+much+larger+number+densities+of+background+galaxies+achieved%2C+which+is+typically+by+two+to+three+orders+of+magnitude+larger+compared+to+radio.+However%2C+the+high+sensitivity+of+the+new+generation+of+radio+telescopes+such+as+the+Square+Kilometre+Array%E2%80%A0(SKA)+will+provide+a+density+of+detected+galaxies+that+is+comparable+to+that+found+at+optical+wavelengths%2C+and+with+significant+source+shape+measurements+to+make+large+area+radio+surveys+competitive+for+weak+lensing+studies.+This+will+lead+weak+lensing+to+become+one+of+the+primary+science+drivers+in+radio+surveys+too%2C+with+the+advantage+that+they+will+access+the+largest+scales+in+the+Universe+going+beyond+optical+surveys%2C+like+LSST%E2%80%A1and+Euclid%C2%A7%2C+in+terms+of+redshifts+that+are+probed.+RadioLensfit+is+an+adaptation+to+radio+data+of+lensfit%2C+a+model-fitting+approach+for+galaxy+shear+measurement%2C+originally+developed+for+optical+weak+lensing+surveys.+Its+key+advantage+is+working+directly+in+the+visibility+domain%2C+which+is+the+natural+approach+to+adopt+with+radio+data%2C+avoiding+systematics+due+to+the+imaging+process.+We+present+results+on+galaxy+shear+measurements%2C+including+investigation+of+sensitivity+to+instrumental+parameters+such+as+the+visibilities+gridding+size%2C+based+on+simulations+of+individual+galaxy+visibilities+performed+by+using+SKA1-MID+baseline+configuration.+We+get+an+amplitude+of+the+shear+bias+in+the+method+comparable+with+SKA1+requirements+for+a+population+of+galaxies+with+realistic+flux+and+scalelength+distributions+estimated+from+the+VLA+SWIRE+catalog.&rft.publisher=Proceedings+of+Science+(PoS)&rft.contributor=Prandoni%2C+I&rft.contributor=Morganti%2C+R&rft.contributor=Best%2C+P&rft.contributor=Bonafede%2C+A&rft.date=2015-10-23&rft.type=Proceedings+paper&rft.source=+++++In%3A+Prandoni%2C+I+and+Morganti%2C+R+and+Best%2C+P+and+Bonafede%2C+A%2C+(eds.)+Proceedings+of+EXTRA-RADSUR2015+-+The+many+facets+of+extragalactic+radio+surveys%3A+towards+new+scientific+challenges.++++Proceedings+of+Science+(PoS)%3A+Bologna%2C+Italy.+(2015)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1520027%2F1%2FRivi_RadioLensfit.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1520027%2F&rft.rights=open