J/ApJ/681/747 Extragalactic point-source WMAP catalog (Chen+, 2008)
Extragalactic point-source search in WMAP 61 and 94 GHz data.
Chen X., Wright E.L.
<Astrophys. J., 681, 747-755 (2008)>
=2008ApJ...681..747C 2008ApJ...681..747C
ADC_Keywords: Cross identifications ; Surveys ; Radio sources
Keywords: cosmic microwave background - cosmology: observations -
methods: data analysis
Abstract:
We report the results of an extragalactic point-source search using
the 61 and 94GHz (V- and W-band) temperature maps from the Wilkinson
Microwave Anisotropy Probe (WMAP). Applying a method that cancels the
"noise" due to the CMB anisotropy signal, we find in the |b|>10°
region 31 sources in the first-year maps and 64 sources in the
three-year co-added maps at a 5σ level. The 1σ position
uncertainties are 1.6' and 1.4', respectively. The increased
detections and improved positional accuracy are expected from the
higher signal-to-noise ratio of the WMAP three-year data. All sources
detected in the first-year maps are repeatedly detected in the
three-year maps, which is a strong indication of the consistency of
this method. Of all the sources, 97% are identified with either the
WMAP three-year source catalog or plausible extrapolations of lower
frequency data, which indicates that our method is also reliable. The
two unidentified sources have been recently confirmed to be false
detections, using the WMAP five-year data. We derive the source count
distribution at the WMAP V band by combining our verified detections
with sources from the WMAP three-year catalog. If we assume that the
effect of source clustering is negligible, the contribution to the
power spectrum from faint sources below 0.75Jy is estimated to be
(2.4±0.8)x10-3uK2sr for the V band, which implies a source
correction amplitude of A=0.012±0.004uK2sr.
Description:
The Wilkinson Microwave Anisotropy Probe (WMAP) was launched in 2001
for the purpose of making precise measurements of the cosmic microwave
background (CMB) anisotropy (Bennett et al., 2003ApJS..148....1B 2003ApJS..148....1B).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 99 64 Point-source catalog: three years
--------------------------------------------------------------------------------
See also:
J/A+A/508/107 : WMAP3 catalogue (Giommi+, 2009)
J/ApJS/180/283 : WMAP source catalog (Wright+, 2009)
J/AZh/85/483 : Sources from the WMAP catalog (Vol'vach+, 2008)
J/MNRAS/384/775 : Bright Source Sample of AT20G Survey (Massardi+, 2008)
J/ApJS/170/288 : WMAP 3 Year Temperature Analysis (Hinshaw+, 2007)
J/ApJS/171/61 : All-Sky Survey of Flat-Spectrum Radio Sources (Healey+,
2007)
J/ApJS/170/108 : NEWPS5σ source catalogue from WMAP (Lopez-Caniego+,
2007)
J/ApJS/148/97 : The WMAP First Year Source Catalog (WMAP1) (Bennett+, 2003)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Hour of right ascension (J2000)
4- 5 I2 min RAm Minute of right ascension (J2000)
7- 8 I2 s RAs Second of right ascension (J2000)
10 A1 --- DE- Declination sign (J2000)
11- 12 I2 deg DEd Degree of declination (J2000)
14- 15 I2 arcmin DEm Arcminute of declination (J2000)
17- 18 I2 arcsec DEs Arcsecond of declination (J2000)
20- 23 A4 --- --- [WMAP]
25- 34 A10 --- WMAP WMAP identification (JHHMM+DDMM)
36- 41 A6 --- Otype Object type
43- 47 F5.1 Jy FV WMAP V-band (4.9mm, 61GHz) flux
49- 51 F3.1 Jy e_FV The estimated 1σ error in FV
53- 66 A14 --- OName 5GHz counterpart if available
67 A1 --- f_OName [c] for multiple possible identification (1)
69- 71 A3 --- I/M [Y/N ] Y or N for Identified/Masked (2)
73- 79 A7 --- Refs Previous reference(s) (3)
81- 99 A19 --- Notes Notes
--------------------------------------------------------------------------------
Note (1): 'c' indicates that source has multiple possible 5GHz
identifications. The brightest one is given here.
Note (2): Information on whether it is identified in this work and if it
is included in the three-year WMAP point-source mask (Hinshaw et al.,
2007, Cat. J/ApJS/170/288, in Simbad) (see Sect. 3
for a detailed discussion on the process of estimating and identifying
the source flux), respectively.
Note (3): References as follows:
1 = Source is included in the CRATES catalog (Healey et al., 2007,
Cat. J/ApJS/171/61, in Simbad).
2 = Source is included in the AT20G BSS catalog (Massardi et al., 2008,
Cat. J/MNRAS/384/775, <AT20G JHHMMSS.s+DDMMSS> or
<[MEM2008] NNN> in Simbad).
3 = New point source, cross-detected in Lopez-Caniego et al. (2007,
Cat. J/ApJS/170/108).
4 = New point source, cross-detected in Nie & Zhang (2007ChJAA...7..199N 2007ChJAA...7..199N).
--------------------------------------------------------------------------------
Nomenclature notes:
Point-sources are mamed <[CW2008] JHHMMSS+DDMMSS> in Simbad.
History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 27-Oct-2010