Changes between Version 1 and Version 2 of GPC_Zero_Points_July09
- Timestamp:
- Aug 16, 2009, 11:18:08 PM (17 years ago)
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GPC_Zero_Points_July09
v1 v2 1 1 I've compared the 816 processed images from the July 2009 data release to SDSS to get zero points for each image. For y band I fit y_{PS} - z_{SDSS} versus i_{SDSS}-z_{SDSS} and got a slope of -0.247. Using this I made a simulated y-band magnitude for each SDSS star as y_{SDSS-sim} = z_{SDSS}-.247*(i_{SDSS}-z_{SDSS}), assuming that stars of zero i-z color should have zero z-y color. I used the resulting simulated y-band magnitudes to compute the PS zero points. 2 3 See [wiki:PS1_depth] for magnitude histograms and [wiki:zpt_variation_july09] for visual representations of the chip-to-chip zero point variations. 2 4 3 5 The summary table is:
