Difference: Meeting2911 (1 vs. 2)

Revision 229 Nov 2018 - JacobChambers

Line: 1 to 1
 
META TOPICPARENT name="StewartBoogertPhotometry2018"
-- AriannaSaba - 28 Nov 2018

Trial_image_with_Photutils.pdf

Added:
>
>
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})
 
META FILEATTACHMENT attachment="Trial_image_with_Photutils.pdf" attr="" comment="" date="1543428240" name="Trial_image_with_Photutils.pdf" path="Trial image with Photutils.pdf" size="100080" user="zbvd241" version="2"
Added:
>
>
META FILEATTACHMENT attachment="sourcetable_boxsize3.png" attr="" comment="" date="1543504241" name="sourcetable_boxsize3.png" path="sourcetable_boxsize3.png" size="25217" user="zbvd104" version="1"
META FILEATTACHMENT attachment="source_detection_m67_boxsize3.png" attr="" comment="" date="1543504250" name="source_detection_m67_boxsize3.png" path="source_detection_m67_boxsize3.png" size="287402" user="zbvd104" version="1"
META FILEATTACHMENT attachment="sourcetable_boxsize11.png" attr="" comment="" date="1543504256" name="sourcetable_boxsize11.png" path="sourcetable_boxsize11.png" size="25802" user="zbvd104" version="1"
META FILEATTACHMENT attachment="source_detection_m67_boxsize11.png" attr="" comment="" date="1543504263" name="source_detection_m67_boxsize11.png" path="source_detection_m67_boxsize11.png" size="380040" user="zbvd104" version="1"

Revision 128 Nov 2018 - AriannaSaba

Line: 1 to 1
Added:
>
>
META TOPICPARENT name="StewartBoogertPhotometry2018"
-- AriannaSaba - 28 Nov 2018

Trial_image_with_Photutils.pdf

META FILEATTACHMENT attachment="Trial_image_with_Photutils.pdf" attr="" comment="" date="1543428240" name="Trial_image_with_Photutils.pdf" path="Trial image with Photutils.pdf" size="100080" user="zbvd241" version="2"
 
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