SWIRE-SDSS FIR LLFs

1
SWIRE-SDSS FIR LLFs

• Well-Matched SWIRE MIPS 24/70/160 micron SDSS
  Optical Coverage
• Particularly so at low (0ltZlt0.25) redshifts
• Three Fields Lockman Hole, ELAIS N1, ELAIS N2
  22.6 deg2
• Total Number of SWIRE-SDSS Sources
• 24 micron gt 0.5 mJy 7,289 ( 0ltZlt0.25 ) Sources
• 70 micron gt 15 mJy 2,593 ( 0ltZlt0.25 ) Sources
• 160 micron gt 75 mJy 1,145 at ( 0ltZlt0.25 )
  Sources
• Good Spec-Z Coverage from SDSS
• SDSS Phot-Z also available based on Neural
  Networks
• Further Miscellaneous Redshifts from NED
• Overall Spec-Z is 25/35/55 at 24/70/160
  micron and 0ltZlt0.25

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24 micron
SWIRE-SDSS
Imperial/IRAS FSC z-cat
Shupe 98 (IRAS)
Marleau 07 (Spitzer FLS)
Rodighiero (sub) (Spitzer GOODS/VVDS)
3
70 micron
SWIRE-SDSS
Imperial/IRAS FSC z-cat
Saunders 90 (IRAS)
Takeuchi 03 (IRAS)
4
160 micron
SWIRE-SDSS
Takeuchi 06 (ISO)
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SWIRE-SDSS FIR LLF

• The homogeneity, quality, well-characterized
  limits as well as the sheer size of the
  SWIRE-SDSS database allow a relatively
  straighforward estimate of the FIR Local
  Luminosity Function down to flux levels order(s)
  of magnitude fainter than IRAS (albeit over a
  smaller area)
• Ample opportunity to extend such a study
• Higher redshift ( 0.25 lt Z lt 0.5 )
• New spectroscopic observations of complete
  samples
• Herschel observations of same fields at 100-500 µm

6
SWIRE-SDSS Workflow

• Download Input Catalogs SDSS (Pub) , IRSA (Pub)
  , IRSA (SWIRE) , SSC (Pub) , WSA (ESO),, NED
  (Pub)
• Source Identification based on position and
  flux matching, e.g. Nearest-Neighbor or
  Likelihood Ratio
• Quality Control based on several SWIRE SDSS
  flags
• Source Characterization Star/Galaxy
• Phot-z calculation following an optimized
  procedure (TBD skipped so far in favor of SDSS
  NED phot-z)
• Completeness Reliability Analysis of all
  previous steps
• Finally Ad Hoc Science Analysis (e.g. 1/Vmax)