Pan-STARRS-1 Medium Deep Survey: Early Cosmology Results from Type Ia Supernovae

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Scientific paper

The Panoramic Survey Telescope And Rapid Response System-1 (Pan-STARRS-1, PS1) has been in full operation since January 2010. The Medium Deep Survey (MDS) component is allocated 25% of the time to cover 11 fields (7-8 sq. deg. each) typically with significant multi-wavelength overlap from previous surveys (i.e., SDSS, DEEP2, CDFS, COSMOS). The cadence covers the g,r,i,z filters every 3 days (the y filter during bright time) with a nightly depth to sample light curves of Type-Ia supernovae to redshifts greater than 0.5. To date, more than 1300 unique optical transients have been identified in the PS1-MDS, including more than 140 spectroscopically confirmed supernovae. We will present early results and cosmological parameters from the sample thus far of Type-Ia supernovae spanning redshifts from 0.03 to greater than 0.6 and discuss the implications for the following 1.5 years of the survey.

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