Access to Astronomical Catalogues

← Click to display the menu
J/MNRAS/464/3357   GMRT 610-MHz observations of the AMI001 field (Whittam+ 2017)

GMRT 610-MHz observations of the faint radio source population - and what these tell us about the higher radio-frequency sky. Whittam I.H., Green D.A., Jarvis M.J., Riley J.M. <Mon. Not. R. Astron. Soc. 464, 3357 (2017)> =2017MNRAS.464.3357W (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Radio sources ; Radio continuum Keywords: galaxies: active - galaxies: starburst - radio continuum: galaxies Abstract: We present 610-MHz Giant Metrewave Radio Telescope observations of 0.84deg2 of the AMI001 field (centred on 00h23m10s, +31d53') with an rms noise of 18microJy/beam in the centre of the field. A total of 955 sources are detected, and 814 are included in the source count analysis. The source counts from these observations are consistent with previous work. We have used these data to study the spectral index distribution of a sample of sources selected at 15.7GHz from the recent deep extension to the Tenth Cambridge (10C) survey. The median spectral index, alpha, (where S∝nu-alpha^) between 0.08<S_15.7GHz/mJy<0.2 is 0.32±0.14, showing that star-forming galaxies, which have much steeper spectra, are not contributing significantly to this population. This is in contrast to several models, but in agreement with the results from the 10C ultra-deep source counts; the high-frequency sky therefore continues to be dominated by radio galaxies down to S15.7GHz=0.1mJy. Description: GMRT 610-MHz source catalogue, containing 955 components. 151 components are flagged as being part of a group. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 109 955 Source catalogue of 955 sources
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Source Source name (HHMMSS+DDMMSS) 15- 31 A17 --- Group Group designation (group name followed by the number of components in the group in brackets) 33- 34 I2 h RAh Peak right ascension (J2000) 36- 37 I2 min RAm Peak right ascension (J2000) 39- 43 F5.2 s RAs Peak right ascension (J2000) 45 A1 --- DE- Peak declination sign (J2000) 46- 47 I2 deg DEd Peak declination (J2000) 49- 50 I2 arcmin DEm Peak declination (J2000) 52- 56 F5.2 arcsec DEs Peak declination (J2000) 58- 64 F7.3 mJy Spk Peak flux density at 610MHz 66- 70 F5.3 mJy e_Spk Error in peak flux density 72- 78 F7.3 mJy Sint Integrated flux density at 610MHz 80- 85 F6.3 mJy e_Sint ?=-1 Error in integrated flux density 87- 90 F4.1 arcsec maj ?=-1 Deconvolved source major axis 92- 95 F4.1 arcsec min ?=-1 Deconvolved source minor axis 97-101 F5.1 deg theta ?=-1 Deconvolved position angle, measured from North to East 103-107 F5.3 mJy/beam Noise Local rms noise 109 A1 --- Type [-EP] Source type (1)
Note (1): Source type as follows: P = point source E = extended source - = fitting failed, unclassified
Acknowledgements: Imogen Whittam, imogenwhittam(at)
(End) Imogen Whittam [UWC], Patricia Vannier [CDS] 27-Jan-2017
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

catalogue service