-- AriannaSaba - 28 Nov 2018

Trial_image_with_Photutils.pdf

Jacob Chambers:

  1. import image
  2. mean,median,std of whole image found
  3. define threshold=median+5std=median+5(3sigma)
  4. define box size in pixel number
  5. if n_ij>n_t, accept
  6. return max pixel value(s) in 'clump' of pixels that represents a star (where a clump consists of 'touching' pixles above threshold)
boxsize=3:

sourcetable_boxsize3.png

source_detection_m67_boxsize3.png

boxsize=11:

sourcetable_boxsize11.png

source_detection_m67_boxsize11.png

next:

  • plot N(R) v R where N(R)=sum(n_{ij}-b_{ij})
Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf Trial_image_with_Photutils.pdf r2 r1 manage 97.7 K 28 Nov 2018 - 18:04 AriannaSaba  
PNGpng source_detection_m67_boxsize11.png r1 manage 371.1 K 29 Nov 2018 - 15:11 JacobChambers  
PNGpng source_detection_m67_boxsize3.png r1 manage 280.7 K 29 Nov 2018 - 15:10 JacobChambers  
PNGpng sourcetable_boxsize11.png r1 manage 25.2 K 29 Nov 2018 - 15:10 JacobChambers  
PNGpng sourcetable_boxsize3.png r1 manage 24.6 K 29 Nov 2018 - 15:10 JacobChambers  
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Topic revision: r2 - 29 Nov 2018 - JacobChambers

 
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