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SCUSS number counts

Shen Shiyin. SCUSS number counts. 2012 catalog. 1590 fields, each field 1 deg x 1 deg 35,646,832 number counts Field catalog file 22 columns DAO photometry, Bertin photometry, SDSS match Tool: read_cat.pro IDL>data=read_cat('a1008.cat') IDL>help,data,/str

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SCUSS number counts

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  1. Shen Shiyin SCUSS number counts

  2. 2012 catalog • 1590 fields, each field 1 deg x 1 deg • 35,646,832 number counts • Field catalog file • 22 columns • DAO photometry, Bertin photometry, SDSS match • Tool: read_cat.pro • IDL>data=read_cat('a1008.cat') • IDL>help,data,/str • Suggestion: use value instead of blank in catalog file

  3. Number counts • Analysis the completeness of SCUSS fields • star: galactic structure (how to?) • galaxy: Galactic extinction compare with SFD map • Au=5.15E(B-V)

  4. Field number counts plot Field number counts plot • Example: a1008.cat Increasing Galactic extinction galaxy: Euclidean geometrydlogN/dlogS=1.5

  5. Galactic extinction: very preliminary results SFD map Au=5.15*E(B-V)

  6. To do • Different exposure time of different fields • Exposure time map • Bright star, very nearby galaxy • Mask map? Eyeball check?

  7. Other issues • Completeness analysis • Statistics • Fake source • Galactic structure

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