========================================================================== J/MNRAS/397/281 Radio imaging in Lockman Hole (Ibar+, 2009) The following files can be converted to FITS (extension .fit or fit.gz) table.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/MNRAS/397/281 ==========================================================================
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Beginning of ReadMe : J/MNRAS/397/281 Radio imaging in Lockman Hole (Ibar+, 2009) ================================================================================ Deep multi-frequency radio imaging in the Lockman Hole using the GMRT and VLA. I. The nature of the sub-mJy radio population. Ibar E., Ivison R.J., Biggs A.D., Lal D.V., Best P.N., Green D.A. <Mon. Not. R. Astron. Soc., 397, 281-298 (2009)> =2009MNRAS.397..281I ================================================================================ ADC_Keywords: Galaxies, radio ; Morphology Keywords: techniques: interferometric - galaxies: evolution - galaxies: starburst - radio continuum: galaxies Abstract: In the run up to routine observations with the upcoming generation of radio facilities, the nature of sub-mJy radio population has been hotly debated. Here, we describe multi-frequency data designed to probe the emission mechanism that dominates in these faint radio sources. Our analysis is based on observations of the Lockman Hole using the Giant Metrewave Radio Telescope (GMRT) - the deepest 610-MHz imaging yet reported - together with 1.4-GHz imaging from the Very Large Array (VLA), well matched in resolution and sensitivity to the GMRT data: sigma_610_MHz 15uJy/beam, sigma_1.4GHz_ 6uJy/beam, full width at half-maximum (FWHM) 5arcsec. The GMRT and VLA data are cross-matched to obtain the radio spectral indices for the faint radio emitters. Description: During six 12-hr sessions in 2006 February and July, we obtained data at 610MHz for three pointings (FWHM 43-arcmin) in the LH (see Table 1), separated by 11-arcmin (lockman-e, lock-3, lhex4), typically with 28 of the 30 antennas that comprise the GMRT near Pune, India. The total integration time in each field, after overheads, was 16hr. New and archival data were obtained in the same three positions using the National Radio Astronomy Observatory's (NRAO2) VLA, largely in its B configuration.