Aperture Photometry Test Cases

Here is the image we will be using to check your aperture photometry code this evening:

ApPhotTest.FIT

The following test cases use an aperture radius of 3 pixels, an annulus inner radius of 6 pixels, and an outer radius of 10 pixels. Uncertainties are given not because you need to report them, but to indicate an acceptable range for your answers.

  • Object near: (x,y)=(313,371)
    • Centroid: (x,y)=(312.94,371.29)
    • Total counts in aperture: 19202
    • Avg. sky counts in annulus: 333.94
    • Signal: 9638.2 +/- 104.0
    • Inst. mag.: -9.96 +/- .01
  • Object near: (x,y)=(396,521)
    • Centroid: (x,y)=(396.15,520.92)
    • Total counts in aperture: 18848
    • Avg. sky counts in annulus: 332.68
    • Signal: 9318.8 +/- 104.5
    • Inst. mag.: -9.92 +/- .01
  • Object near: (x,y)=(230,432)
    • Centroid: (x,y)=(229.75,431.72)
    • Total counts in aperture: 10643
    • Avg. sky counts in annulus: 332.02
    • Signal: 1134.1 +/- 52.3
    • Inst. mag.: -7.64 +/- .05
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