Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/research/AT20G/at20g.ReadMe Дата изменения: Mon Jan 16 02:44:36 2012 Дата индексирования: Tue Oct 2 03:08:36 2012 Кодировка: Поисковые слова: m 63

XXX/XX Australia Telescope 20GHz Survey (AT20G) (Murphy+ 2009)
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The Australia Telescope 20GHz Survey (AT20G), Version XX October 2009.
Murphy T., Sadler E. M., Ekers R. D., Massardi M., Hancock P. J.,
Mahony, E., Ricci R., Burke-Spolaor S., Calabretta M., Chhetri R.,
De Zotti G., Edwards P. G., Ekers J. A., Jackson C. A., Kesteven M. J.,
Lindley E., Newton-McGee K., Phillips C., Roberts P., Sault R. J.,
Staveley-Smith L., Subrahmanyan R., Walker M. A., Wilson W. E.

=2009MNRAS.XXXX
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ADC_Keywords: Radio sources ; Surveys ; Radio continuum
Keywords: radio continuum: general -- catalogues -- surveys -- galaxies: active
-- cosmic microwave background -- methods: data analysis

Description:
The Australia Telescope 20GHz Survey (AT20G) is a blind radio survey carried
out at 20~GHz with the Australia Telescope Compact Array (ATCA) from 2004 to
2008, and covers the whole sky south of declination 0\degr. The AT20G source
catalogue presented here is an order of magnitude larger than any previous
catalogue of high-frequency radio sources, and includes 5890 sources above a
20~GHz flux-density limit of 40\,mJy. All AT20G sources have total
intensity and polarisation measured at 20~GHz, and most sources south of
declination $-15\degr$ also have near-simultaneous flux-density measurements
at 5 and 8~GHz. A total of 1559 sources were detected in polarised total
intensity at one or more of the three frequencies.


File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
at20gcat.dat 140 5890 The AT20G Catalogue, Version 1.0 (2009-10-15)
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See also:
J/MNRAS/384/775/AT20G : Australia Telescope 20GHz (AT20G) Survey: Bright
Source Sample (Massardi+ 2008)

Byte-by-byte Description of file: at20gcat.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Name IAU designation
21- 22 I2 h RAh Right Ascension J2000 (hours) (1)
24- 25 I2 min RAm Right Ascension J2000 (minutes)
27- 31 F5.2 s RAs Right Ascension J2000 (seconds)
33 A1 --- DE- Declination J2000 (sign) (2)
34- 35 I2 deg DEd Declination J2000 (degrees)
37- 38 I2 arcmin DEm Declination J2000 (minutes)
40- 43 F4.1 arcsec DEs Declination J2000 (seconds)
45- 49 I5 mJy/bm S20 Peak brightness at 20 GHz (in mJy/beam) (3)
51- 53 I3 mJy/bm e_S20 Uncertainty on S20
55- 59 I5 mJy/bm S8 Peak brightness at 8 GHz (in mJy/beam) (3)
61- 63 I3 mJy/bm e_S8 Uncertainty on S8
65- 69 I5 mJy/bm S5 Peak brightness at 5 GHz (in mJy/beam) (3)
71- 73 I3 mJy/bm e_S5 Uncertainty on S5
75- 77 A3 --- Epoch Epoch of observation at 20,8,5 GHz (4)
79 A1 --- Quality Quality flag (g=good or p=poor)
81- 83 A3 --- Flags Other flags (5)
85- 89 I5 mJy/bm P20 Polarized flux density (or limit) at 20 GHz
91- 92 I2 mJy/bm e_P20 Uncertainty on P20
94- 98 F5.1 --- m20 Fractional polarisation at 20 GHz
100-102 I3 deg PA20 Position angle at 20 GHz
104-108 I5 mJy/bm P8 Polarized flux density (or limit) at 8 GHz
110-111 I2 mJy/bm e_P8 Uncertainty on P8
113-117 F5.1 --- m8 Fractional polarisation at 8 GHz
119-121 I3 deg PA8 Position angle at 8 GHz
123-127 I5 mJy/bm P5 Polarized flux density (or limit) at 5 GHz
129-130 I2 mJy/bm e_P5 Uncertainty on P5
132-136 F5.1 --- m5 Fractional polarisation at 5 GHz
138-140 I3 deg PA5 Position angle at 5 GHz

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Note (1): The mean uncertainty in RA is 0.9 arcsec. See Sec 4.1 of the paper.

Note (2): The mean uncertainty in Dec is 1.0 arcsec. See Sec 4.1 of the paper.

Note (3): See Sec 3.3.2 for calculation of fluxes for extended sources.

Note (4): The 3 digits give the epoch code for the 3 frequencies.
See Table 3 of the paper for an explanation of the epoch codes.

Note (5): Possible values for flags: e=extended source, h=Galactic HII region,
p=Galactic planetary nebula, m=Magellanic clouds source,
l=no match in low frequency surveys, b=large and extended.
See the paper for more details of these classifications.

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