J/MNRAS/306/708 The Phoenix Survey (Georgakakis+, 1999)
The Phoenix Survey: optical and near-infrared observations of faint radio sources. Georgakakis A., Mobasher B., Cram L., Hopkins A., Lidman C., Rowan-Robinson M. <Mon. Not. R. Astron. Soc. 306, 708 (1999)> =1999MNRAS.306..708G
ADC_Keywords: Galaxies, radio ; Galaxies, photometry ; Redshifts ; Equivalent widths Keywords: surveys - galaxies: active - galaxies: starburst - cosmology: observations - radio continuum: galaxies Abstract: Using a deep Australia Telescope Compact Array (ATCA) radio survey covering an area of ∼3deg2 to a 4σ sensitivity of ≥100mmJy at 1.4GHz, we study the nature of faint radio galaxies. About 50 per cent of the detected radio sources are identified with an optical counterpart revealed by CCD photometry to m_R=22.5mag. Near-infrared (K-band) data are also available for a selected sample of the radio sources, while spectroscopic observations have been carried out for about 40 per cent of the optically identified sample. These provide redshifts and information on the stellar content. Emission-line ratios imply that most of the emission-line sources are star-forming galaxies, with a small contribution (∼10 per cent) from Sy1/Sy2 type objects. We also find a significant number of absorption-line systems, likely to be ellipticals. These dominate at high flux densities (>1mJy) but are also found at sub-mJy levels. Using the Balmer decrement we find a visual extinction AV=1.0 for the star-forming faint radio sources. This moderate reddening is consistent with the V-R and R-K colours of the optically identified sources. For emission-line galaxies, there is a correlation between the radio power and the Halpha luminosity, in agreement with the result of Benn et al. (1993MNRAS.263....9B). This suggests that the radio emission of starburst radio galaxies is a good indicator of star formation activity. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 128 246 Properties of the faint radio source catalogue
See also: VIII/57 : Fluxes of Faint Radio Sources at 2.7/4.75 GHz (Forkert+, 1987) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [GMC99b] Sequential number ([GMC99b] NNN in Simbad) 5- 6 I2 h RAh Right ascension (J2000) 8- 9 I2 min RAm Right ascension (J2000) 11- 16 F6.3 s RAs Right ascension (J2000) 18 A1 --- DE- Declination sign (J2000) 19- 20 I2 deg DEd Declination (J2000) 22- 23 I2 arcmin DEm Declination (J2000) 25- 29 F5.2 arcsec DEs Declination (J2000) 31- 35 F5.2 mag Vmag ? V magnitude 37- 41 F5.2 mag Rcmag ? Cousins R magnitude 43- 47 F5.2 mag Kmag ? K magnitude 49- 54 F6.3 mJy S1.4GHz Radio flux density at 1.4GHz 56- 59 F4.2 mag V-Rc ? Cousins V-Rc colour index 61- 64 F4.2 mag e_V-Rc ? rms uncertainty on V-Rc 66- 69 F4.2 mag Rc-K ? Cousins R-Kc colour index 71- 74 F4.2 mag e_Rc-K ? rms uncertainty on R-Kc 76- 80 F5.3 --- z Redshift 82 I1 --- q_z [0/3] Redshift estimate quality parameter (1) 84- 88 F5.2 [W/Hz] logP1.4GHz ? log10 of radio luminosity at 1.4GHz 90- 95 F6.2 mag RMAG ? Absolute R magnitude 97-101 F5.2 [W] logLHa ? log10 Hα luminosity 103-105 I3 0.1nm EWHa ? Rest-frame Hα equivalent width 107-108 I2 0.1nm e_EWHa ? rms uncertainty on EWHa 110-112 I3 0.1nm EW[OII] ? Rest-frame [O II]3727 equivalent width 114-115 I2 0.1nm e_EW[OII] ? rms uncertainty on EW[OII] 117-128 A12 --- Class Spectral classification
Note (1): Quality values are: -- a value Q=3 corresponds to three or more identified spectral features, indicating a firmly established redshift. -- a value Q=0, 1 and 2 corresponds to zero (no redshift determination), one and two identified spectral features respectively.
History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 25-Apr-2000
|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|