WISE Software Interface Specification; qua09; (WSDC D-I175)
Version 1.0: October 30, 2009
Interface Name: Completeness and Reliability Truth Tables for QA
Type of Interface: ASCII text file output by non-pipeline IDL software
Read By: WISE QA Application Framework ___________ H. Brandenburg
Written By: get_sep/get_nep _________________________ C. Gelino
Description:
These programs take a list of point sources at the North Ecliptic Pole (NEP) and
South Ecliptic Pole (SEP) with photometry from IRAC and MIPS on Spitzer and
filters the list according to the criteria listed below. Photometry were
obtained by T. Jarrett using a non-pipeline version WPhot. For each band and
pole two source lists were created, a "clean" list and a "full" list. The
"clean" list is a set of stars within a fixed, circular region on the sky,
having only nominal flags set (i.e., no saturation, upper limits, blending,
etc.), and having SNR>20. This list is used for the Completeness calculation.
The "full" list keeps sources with SNR>20 and does no other checks. The "full"
list is used for Reliability.
The mapping from Spitzer data to WISE bands is as follows:
IRAC Ch. 1 -> W1
IRAC Ch. 2 -> W2
IRAC Ch. 4 -> W3
MIPS 24 -> W4
NEP Source list:
The "clean" source lists were obtained from the source file
"NEP_IRAC+MIPS.CompleteArea.2009Aug15.tbl". The sources in this table were
spatially filtered to be within 21.5 arcmin of the J2000 position
RA = 270.030470, Dec = 66.614521 (decimal degrees). The position was selected
such that point sources in this area were contained within the image boundaries
of all Spitzer images. This table was filtered according to these criteria:
aperture mag < 98.0 (mag=99.00 -> null)
best magnitude type != 's' (no saturated sources)
aperture mag error <= 1.0857/20.0 (SNR>20 sources only)
> 0.0 (error for null source)
# blends == 1 (not a blended source)
blend flag == 0 (not a blended source)
source flag == 0 (nominal photometry)
profile magnitude error < 9.8 (no upper limit sources)
Selected sources were written to files named nep_clean_w[1-4].tbl
The "full" lists were obtained from the source file
"NEP_IRAC+MIPS.All.2009Aug15.tbl". This file contains an irregularly shaped
region of stars, that may or may not be present on all images. The only
filtering done was to ensure sources with SNR>20 (see above). Selected sources
were written to files named nep_full_w[1-4].tbl.
SEP Source list:
The "clean" source lists were obtained from the source file
"SEP_IRAC+MIPS.CompleteArea.2009Oct21.tbl". Unlike, the NEP Complete Area source
table, the sources in this file were not contained within a simple circular area.
Therefore, I selected a circular area that was uniformly populated by point
sources and did not contain gaps in the coverage. The sources in this table
were spatially filtered to be within 24.5 arcmin of the J2000 position RA =
89.582736, Dec = -66.911229 (decimal degrees). This table was filtered according
to the criteria described for the NEP "clean" table.
Selected sources were written to files named sep_clean_w[1-4].tbl
Since the Spitzer source list used for the "clean" table covered a larger area
than used for the "clean" table, I was able to use the same input file for the
"full" list. As before, the only filtering done was to ensure sources with
SNR>20 (see above). Selected sources were written to files named
sep_full_w[1-4].tbl.
Column Header Descriptions:
ra = J2000 Right Ascension [decimal degrees]
dec = J2000 Right Ascension [decimal degrees]
mag = WAPPco photometry [mag]
merr = WAPPco phototry uncertainty [mag]
Example Table:
| ra | dec | mag | merr |
| r | r | r | r |
269.4936523 66.8747635 10.832 0.006
269.7091980 66.8278275 10.296 0.006
269.6582336 66.7810822 11.078 0.006
269.8007202 66.6933212 8.894 0.006
270.5072021 66.6275253 8.964 0.006
270.8410645 66.5690536 10.213 0.006
270.7901306 66.4699097 99.000 0.000
269.4659729 66.4296341 99.000 0.000
269.4330444 66.4486084 9.857 0.006
269.4644165 66.5175171 9.027 0.006
269.7664795 66.5164490 10.009 0.006