Publication Date:
2013-12-06
Description:
The Panoramic Survey Telescope and Rapid Response System 1 survey is currently obtaining imaging in five bands ( g P1 , r P1 , i P1 , z P1 and y P1 ) for the 3 steradian survey, one of the largest optical surveys ever conducted. The finished survey will have spatially varying depth, due to the survey strategy. This paper presents a method to correct galaxy number counts and galaxy clustering for this potential systematic based on a simplified signal-to-noise ratio measurement. A star and galaxy separation method calibrated using realistic synthetic images is also presented, along with an approach to mask bright stars. By using our techniques on a 69 square degree region of science verification data this paper shows PS1 measurements of the two-point angular correlation function as a function of apparent magnitude agree with measurements from deeper, smaller surveys. Clustering measurements appear reliable down to a magnitude limit of r P1 〈 22.5. Additionally, stellar contamination and false detection issues are discussed and quantified. This work is the second of two papers which pave the way for the exploitation of the full 3 survey for studies of large-scale structure.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
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