Anaïs Moller (ANU): Update from Australia’s SkyMapper and the DES supernova cosmology analysis

lundi 26 mars 2018, 14:00 → 16:00 Europe/Paris

The Dark Energy Survey (DES) is using four probes to investigate the dynamics of  
            the expansion of the Universe. The DES Supernova Program (DES-SN) is observing    
            27 square degrees with a 6-day cadence to obtain a large sample of type Ia        
            supernovae for cosmology. In collaboration with DES, OzDES is using the AAT to    
            obtain redshifts and classifications for objects in the DES fields. While         
            probing dark energy using type Ia supernovae is the prime aim of the supernova    
            survey, the observing strategy enables us to conduct a number of other            
            investigations, such as AGN reverberation mapping and galaxy properties.          
                                                                                              
            The SkyMapper Telescope is a 1.3m wide-field robotic optical telescope located    
            at Siding Spring Observatory in Australia. SkyMapper is performing a digital      
            Southern Sky Survey in six filters (uvgriz) and the SkyMapper Transient (SMT)     
            survey. The later, explores variability in the southern sky by performing both a  
            rolling search and a Target of Opportunity program . The SkyMapper Supernova      
            program searches ~1000deg2 per night with a 3-4 day cadence, discovering          
            supernovae at redshift z < 0.1.                                                   
                                                                                              
            In this talk, I will present updates on the two projects: DES preliminary         
            cosmological parameter constraints from the first 3-years of the DES-SN survey    
            and SkyMapper first results.