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J/MNRAS/385/1656    Extragalactic radio-sources at 95GHz      (Sadler+, 2008)

The extragalactic radio-source population at 95GHz. Sadler E.M., Ricci R., Ekers R.D., Sault R.J., Jackson C.A., De Zotti G. <Mon. Not. R. Astron. Soc., 385, 1656-1672 (2008)> =2008MNRAS.385.1656S
ADC_Keywords: Radio sources ; Galaxies, radio ; QSOs Keywords: techniques: interferometric - galaxies: active - quasars: general - cosmic microwave background - radio continuum: galaxies - radio continuum: general Abstract: We have used the Australia Telescope Compact Array (ATCA) at 95GHz to carry out continuum observations of 130 extragalactic radio sources selected from the Australia Telescope 20GHz (AT20G) survey. We use a triple-correlation method to measure simultaneous 20- and 95-GHz flux densities for these objects, and over 90 per cent of our target sources are detected at 95GHz. We demonstrate that the ATCA can robustly measure 95-GHz flux densities with an accuracy of ∼10 per cent in a few minutes for sources stronger than about 50mJy. We measure the distribution of radio spectral indices in a flux-limited sample of extragalactic sources, and show that the median 20-95GHz spectral index does not vary significantly with flux density for S20>150mJy . This finding allows us to estimate the extragalactic radio source counts at 95GHz by combining our observed 20-95GHz spectral-index distribution with the accurate 20-GHz source counts measured in the AT20G survey. Description: The data analysed in this paper were obtained at the Australia Telescope Compact Array (ATCA) in two observing runs during 2005 July 1-3 and 2006 September 16-19. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 140 68 Table of 2005 observations table5.dat 140 70 Table of 2006 observations
See also: VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998) VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1) (Mauch+ 2008) Byte-by-byte Description of file: table[45].dat
Bytes Format Units Label Explanations
1 A1 --- n_Name [abc] Note on source (1) 3- 11 A9 --- Name Name (HHMM-DDMM) 12 A1 --- f_Name [C*] Calibrator or low-latitude source (2) 14- 15 I2 h RAh Right ascension (J2000) 17- 18 I2 min RAm Right ascension (J2000) 20- 24 F5.2 s RAs Right ascension (J2000) 26 A1 --- DE- Declination sign (J2000) 27- 28 I2 deg DEd Declination (J2000) 30- 31 I2 arcmin DEm Declination (J2000) 33- 36 F4.1 arcsec DEs Declination (J2000) 38- 52 A15 --- OName Alternate name 53 A1 --- l_Bjmag Limit flag on Bjmag 54- 58 F5.2 mag Bjmag ? Blue (BJ) magnitude of the optical counterpart if any (3) 60 I1 --- T [0/2]? Supercosmos classification of the optical ID (4) 62 A1 --- l_S95-1 Limit flag on S95GHz1 63- 66 I4 mJy S95-1 ? Flux density at 95GHz, 2005 Day1 or 2006 (5) 68 A1 --- l_S95-2 Limit flag on S95GHz2 69- 72 I4 mJy S95-2 ? Flux density at 95GHz, 2005 Day2 (5) 74- 77 I4 mJy S20-1 ? Flux density at 20GHz, 2005 or 2006 (5) 79- 82 I4 mJy S20-2 ? Flux density at 20GHz, 2004 (6) 84- 86 I3 mJy e_S20-2 ? rms uncertainty on S20GHz2 88- 91 I4 mJy S8.6 ? Flux density at 8.6GHz, 2004 (6) 93- 95 I3 mJy e_S8.6 ? rms uncertainty on S8.6GHz 97-100 I4 mJy S4.8 ? Flux density at 4.8GHz, 2004 (6) 102-104 I3 mJy e_S4.8 ? rms uncertainty on S4.8GHz 106-111 F6.1 mJy S1.4 ? NVSS (Cat. VIII/65) 1.4GHz flux density 113-116 F4.1 mJy e_S1.4 ? rms uncertainty on S1.4GHz 118 A1 --- l_S843 Limit flag on S843MHz 119-124 F6.1 mJy S843 ? SUMSS (Cat. VIII/81) 843MHz flux density 126-130 F5.1 mJy e_S843 ? rms uncertainty on S843MHz 132-137 F6.4 --- z ? Spectroscopic redshift of optical counterpart 139-140 A2 --- ID [QG ? PN] Source class (Quasar, Galaxy, PN)
Note (1): Flag, for table4 only, as follows: a = Sources with inverted radio spectra at 5-20GHz b = Other sources observed but later removed from the 'inverted spectrum' sample c = Strong sources from the ATCA calibrator list Note (2): Flag as follows: C = ATCA calibrator * = source within 10° of the Galactic plane Note (3): From Supercosmos catalog (Hambly et al., 2001MNRAS.326.1279H). Note (4): ID as follows: 0 = not classified 1 = galaxy 2 = stellar object (candidate QSO) Note (5): Simultaneous TCA 95- and 20-GHz flux densities measured in 2005-6 in this project. Note (6): Near-simultaneous ATCA 20-, 8- and 5-GHz flux densities measured by the AT20G team in 2004 November. The listed values are from the 2007 July run of the AT20G data pipeline.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 26-May-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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