SEP MIPS 70 micron Point Source Catalog Definition
SEP Overview
The Spitzer/MIPS 24 and 70 μm imaging of an 11.5 square degree region near the South Ecliptic Pole (SEP) has been carried out in order to complement sub-millimeter wavelength observations (250-500 μm) of the same region of sky taken with the Balloon-borne Large Aperture Sub-millimeter Telescope (BLAST), with the goal of better characterizing the nature of sub-millimeter selected galaxies and their role in galaxy evolution. This field has also been extensively mapped at other wavelengths, and will be imaged from 100-500 μm as part of the Herschel Multi-tiered Extragalactic Survey (HerMES).
Complete documentation can be found in Scott et al. (2010); please reference this paper if you use these data in your research.
SEP MIPS 70 micron Point Source Catalog Criteria
Source detection and photometry were performed using the APEX software within the MOPEX package. Source candidates with S/N > 6 and reduced chi-squared values less than or equal to three (93% of the sources) are considered reliable detections. The remaining source candidates were then inspected (see Scott et al. 2010 for details) and false positives were removed from the catalog.
SEP MIPS 70 micron Point Source Catalog Column Descriptions
Gator serves the SEP MIPS 70 micron Point Source Catalog (18 columns, 891 data rows).
| Name | Intype | Units | Description |
|---|---|---|---|
| srcid | int | Source identification | |
| ra | double | degree | Right Ascension (J2000) |
| dec | double | degree | Declination (J2000) |
| xc | real | pixels | Mosaic x-coordinate for source |
| yc | real | pixels | Mosaic y-coordinate for source |
| flux | real | microJy | PRF-fitted flux density |
| delta_flux | real | microJy | Uncertainty on PRF-fitted flux density |
| chi2_dof | real | chi^2/dof for PRF-fit | |
| ps_chi2_dof | real | Partial chi^2/dof of one source (if passive deblending performed) | |
| status | int | Status of fit: -2 = Fitting converged; chi^2/dof > 3 -1 = Maximum number of iterations reached; chi^2/dof > 3 1 = Fitting converged; chi^2/dof < 3 2 = Maximum number of iterations reached; chi^2/dof < 3 |
|
| SNR | real | Signal to noise ratio | |
| deblend | char | Type of deblending performed: N = no deblending P = passif deblending |
|
| aperture1 | real | microJy | Aperture photometry using 4-pixel (16 arcsec) radius (see Note) |
| aperture2 | real | microJy | Aperture photometry using 7-pixel (28 arcsec) radius (see Note) |
| aperture3 | real | microJy | Aperture photometry using 9-pixel (36 arcsec) radius (see Note) |
| ap_unc1 | real | microJy | Uncertainty in flux for aperture1 |
| ap_unc2 | real | microJy | Uncertainty in flux for aperture2 |
| ap_unc3 | real | microJy | Uncertainty in flux for aperture3 |
Uncorrected aperture fluxes are given. Aperture corrections are:
| Aperture radius | Correction |
|---|---|
| 4 pixel | 1.59 |
| 7 pixel | 1.18 |
| 9 pixel | 1.00 |