FLS: Extragalactic Component: Ge data

I. Summary

Coadded mosaics of the entire xFLS data sets along with the corresponding coverage maps and uncertainty images are provided. The mosaics are from the filtered products and have been background subtracted. The absolute level of the uncertainty image has been scaled to match the empirical noise within the mosaics. The coverage map represents the effective number of input BCDs for each pixel of the mosaic after outlier rejection. There are regions within the 70um and 160um mosaics with zero coverage. The 70um image has gaps in the south-west corner of the mosaic due to non-overlapping AORs. The 160um mosaics have a regular pattern of low coverage due to the unusable block of five detectors and the low redundancy of these observations.

Point-source catalogs were made for sources with S/N>7 at each wavelength to insure high reliability. Sources near the edges or within regions of very low coverage were deleted from the public catalogs to avoid potentially spurious sources. In total, 687 70um sources and 207 160um sources are cataloged. The 70um and 160um catalogs are independent. The catalogs can be combined together or with xFLS data at other wavelengths, depending on the specific application. The average point source rms (1-sigma) is 2.8 mJy and 20 mJy for the 70um warm+main data and 160um main-survey data, respectively. For the deeper verification regions, the point source rms is 1.6 mJy at 70um and 10 mJy at 160um.

The images were examined visually to validate source detection and to determine the appropriate method for deriving the flux densities on a source by source basis. About 98% of the derived flux densities are based on PRF fitting. The remaining sources mostly consist of bright extended galaxies and/or close blends that are not well fitted by the PRF. In these cases, large aperture measurements were made to derive the total flux densities.

II. Images

• FLS70_mosaic.fits: 70um mosaic of main+warm+verification data
• FLS70_mosaic_unc.fits: Uncertainty image of 70um mosaic
• FLS70_mosaic_cov.fits: Coverage map of the 70um mosaic
• FLS160_mosaic.fits: 160um mosaic of main+verification data
• FLS160_mosaic_unc.fits: Uncertainty image of 160um mosaic
• FLS160_mosaic_cov.fits: Coverage map of the 160um mosaic

III. Catalogs

• FLS70_sn7_jul05.txt: xFLS MIPS-70um >7sigma catalog
• FLS160_sn7_jul05.txt: xFLS MIPS-160um >7sigma catalog

1. Source Name
2. RA(J2000) [decimal degree]
3. Dec(J2000) [decimal degree]
4. Radial positional uncertainty (1-sigma) [arcsec]
5. Flux Density [mJy]
6. Error on Flux Density [mJy] The flux density errors include the 15% (70um) and 25% (160um) uncertainty of the absolute flux density scale.
7. Flag for flux measurement A flag of ``prf'' indicates that the source was fitted by the PRF, while a flag starting with an ``a'' indicates that an aperture measurement was used (for cases of extended sources and/or close blends). The number following the ``a'' gives the aperture diameter in arcsec; e.g., a120 implies an aperture diameter of 120 arcsec. Sources with aperture flags ending with a ``m'' represent bright galaxies not well fitted by the PRF and with nearby companions; in these cases, the flux density of the bright galaxy was derived by subtracting the PRF measurement(s) of the nearby faint point source(s) from the total aperture flux density.

IV. Reference Paper

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