J/ApJ/731/100 148GHz ACT extragalactic sources catalog (Marriage+, 2011)
The Atacama Cosmology Telescope: extragalactic sources at 148 GHz in the 2008
survey.
Marriage T.A., Juin J.B., Lin Y.-T., Marsden D., Nolta M.R., Partridge B.,
Ade P.A.R., Aguirre P., Amiri M., Appel J.W., Barrientos L.F.,
Battistelli E.S., Bond J.R., Brown B., Burger B., Chervenak J., Das S.,
Devlin M.J., Dicker S.R., Doriese W.B., Dunkley J., Dunner R.,
Essinger-Hileman T., Fisher R.P., Fowler J.W., Hajian A., Halpern M.,
Hasselfield M., Hernandez-Monteagudo C., Hilton G.C., Hilton M.,
Hincks A.D., Hlozek R., Huffenberger K.M., Hughes D.H., Hughes J.P.,
Infante L., Irwin K.D., Kaul M., Klein J., Kosowsky A., Lau J.M., Limon M.,
Lupton R.H., Martocci K., Mauskopf P., Menanteau F., Moodley K.,
Moseley H., Netterfield C.B., Niemack M.D., Page L.A., Parker L.,
Quintana H., Reid B., Sehgal N., Sherwin B.D., Sievers J., Spergel D.N.,
Staggs S.T., Swetz D.S., Switzer E.R., Thornton R., Trac H., Tucker C.,
Warne R., Wilson G., Wollack E., Zhao Y.
<Astrophys. J., 731, 100 (2011)>
=2011ApJ...731..100M 2011ApJ...731..100M
ADC_Keywords: Active gal. nuclei ; Radio continuum ; Millimetric/submm sources ;
Surveys ; Cross identifications
Keywords: cosmic background radiation - galaxies: active -
radio continuum: galaxies - surveys
Abstract:
We report on extragalactic sources detected in a 455deg2 map of the
southern sky made with data at a frequency of 148GHz from the Atacama
Cosmology Telescope (ACT) 2008 observing season. We provide a catalog
of 157 sources with flux densities spanning two orders of magnitude:
from 15mJy to 1500mJy. Comparison to other catalogs shows that 98% of
the ACT detections correspond to sources detected at lower radio
frequencies. Three of the sources appear to be associated with the
brightest cluster galaxies of low-redshift X-ray-selected galaxy
clusters. Estimates of the radio to millimeter-wave spectral indices
and differential counts of the sources further bolster the hypothesis
that they are nearly all radio sources, and that their emission is not
dominated by re-emission from warm dust. In a bright (>50mJy) 148GHz
selected sample with complete cross-identifications from the Australia
Telescope 20GHz survey, we observe an average steepening of the
spectra between 5, 20, and 148GHz with median spectral indices of
α5-20=-0.07±0.06, α20-148=-0.39±0.04, and
α5-148=-0.20±0.03. When the measured spectral indices are
taken into account, the 148GHz differential source counts are
consistent with previous measurements at 30GHz in the context of a
source count model dominated by radio sources. Extrapolating with an
appropriately rescaled model for the radio source counts, the Poisson
contribution to the spatial power spectrum from synchrotron-dominated
sources with flux density less than 20mJy is
CSync=(2.8±0.3)x10-6µK2.
Description:
The 2008 southern observations were carried out over a survey area
9° wide, centered on DE=-53.5°, and extending from RA 19h to
24h and 00h to 07h30. The subset of these data used in the present
analysis lies between RA 00h12m and 07h08m and DE=-56°11' and
-49°00' (455deg2). The area was chosen to encompass the data
used for power spectrum work in Fowler et al. (2010ApJ...722.1148F 2010ApJ...722.1148F)
and represents a large fraction of the most deeply covered regions
from the 2008 ACT 148GHz (2.0mm) data set.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 93 157 ACT (Atacama Cosmology Telescope) high significance
148GHz extragalactic source catalog
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See also:
J/MNRAS/402/2403 : Australia Telescope 20GHz Survey Catalog (AT20G)
(Murphy+, 2010)
J/ApJ/718/587 : The Fermi-AT20G catalog (Mahony+, 2010)
J/ApJ/719/763 : Millimeter-wave sources in the SPT survey (Vieira+, 2010)
J/MNRAS/384/775 : Bright Source Sample of AT20G Survey (Massardi+, 2008)
http://www.princeton.edu/act/ : ACT web site
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [ACT-S]
7- 20 A14 --- ACT-S ACT identification (JHHMMSS+DDMMSS)
22- 23 I2 h RAh Hour of right ascension (J2000)
25- 26 I2 min RAm Minute of right ascension (J2000)
28- 29 I2 s RAs Second of right ascension (J2000)
31 A1 --- DE- Sign of declination (J2000)
32- 33 I2 deg DEd Degree of declination (J2000)
35- 36 I2 arcmin DEm Arcminute of declination (J2000)
38- 39 I2 arcsec DEs Arcsecond of declination (J2000)
41- 45 F5.1 --- S/N Signal to noise ratio
47- 52 F6.1 mJy Sm Flux density as measured directly from the
ACT 148GHz map
54- 59 F6.1 mJy Sdb Deboosted 148GHz flux density (1)
61- 63 F3.1 mJy E_Sdb Positive error on Sdb
65- 67 F3.1 mJy e_Sdb Negative error on Sdb
69- 72 F4.1 min Tint ? Integration time per square arcminute
74- 78 A5 --- --- [AT20G]
80- 93 A14 --- AT20G AT20G identification (JHHMMSS+DDMMSS)
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Note (1): Deboosted flux densities as described in Section 3.2.2 for sources
with Sm<50mJy. For sources above 50mJy, the measured flux together
with S/N-derived errors is reported (see Section 3.2.2).
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 19-Oct-2012