Access to Astronomical Catalogues

← Click to display the menu
J/ApJS/188/178   VLA 1.4GHz observations of GOODS-North field  (Morrison+, 2010)

Very Large Array 1.4 GHz observations of the GOODS-North field: data reduction and analysis. Morrison G.E., Owen F.N., Dickinson M., Ivison R.J., Ibar E. <Astrophys. J. Suppl. Ser., 188, 178-186 (2010)> =2010ApJS..188..178M
ADC_Keywords: Radio sources ; Radio continuum Keywords: cosmology: observations - galaxies: evolution - galaxies: starburst - infrared: galaxies Abstract: We describe deep, new, wide-field radio continuum observations of the Great Observatories Origins Deep Survey-North field. The resulting map has a synthesized beam size of ∼1.7" and an rms noise level of ∼3.9uJy/beam near its center and ∼8uJy/beam at 15' from phase center. We have cataloged 1230 discrete radio emitters, within a 40'x40' region, above a 5σ detection threshold of ∼20uJy at the field center. New techniques, pioneered by Owen & Morrison, have enabled us to achieve a dynamic range of 6800:1 in a field that has significantly strong confusing sources. We compare the 1.4GHz (20cm) source counts with those from other published radio surveys. Our differential counts are nearly Euclidean below 100uJy with a median source diameter of ∼1.2". This adds to the evidence presented by Owen & Morrison that the natural confusion limit may lie near 1uJy. If the Euclidean slope of the counts continues down to the natural confusion limit as an extrapolation of our logN-logS, this indicates that the cutoff must be fairly sharp below 1uJy else the cosmic microwave background temperature would increase above 2.7K at 1.4GHz. Description: 165hr observations were done at night, for a region centered at 12:36:49.4+62:12:58 (J2000), at 1.4GHz, using the National Radio Astronomy Observatory's (NRAO's) VLA between 2005 February and 2006 February. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 101 1230 Radio source catalog
See also: VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998) J/AJ/112/1335 : Hubble Deep Field observations (Williams+ 1996) J/MNRAS/358/1159 : Radio sources in HDF and HFF (Muxlow+, 2005) J/MNRAS/371/963 : Deep VLA survey in Lockman Hole, HDFN, ELAISN2 (Biggs+ 2006) J/ApJS/167/103 : Radio/Optical catalog of the SSA 13 field (Fomalont+, 2006) J/AJ/136/1889 : 20cm observations of deep Swire Field (Owen+, 2008) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 I5 --- [MOD2010] [1/11103] Catalog Source Number 7- 8 I2 h RAh Hour of Right Ascension (J2000) 10- 11 I2 min RAm Minute of Right Ascension (J2000) 13- 17 F5.2 s RAs Second of Right Ascension (J2000) 19- 23 F5.3 s e_RAs Error in RAs 24 A1 --- DE- Declination sign 25- 26 I2 deg DEd Degree of Declination (J2000) 28- 29 I2 arcmin DEm Arcminute of Declination (J2000) 31- 34 F4.1 arcsec DEs Arcsecond of Declination (J2000) 36- 39 F4.2 arcsec e_DEs Error in DEs 41- 46 F6.1 --- S/N Peak Signal/Noise Ratio 48- 55 F8.1 uJy Sp Observed peak brightness at 1.4GHz (1) 57- 60 F4.1 uJy e_Sp Error in Sp 62- 70 F9.1 uJy Stot Total flux density at 1.4GHz 72- 77 F6.1 uJy e_Stot Error in Stot 79- 83 F5.1 arcsec bmaj Fitted Gaussian major axis FWHM 85- 88 F4.1 arcsec bmin Fitted Gaussian minor axis FWHM 90- 92 I3 deg PA Fitted position angle 94- 97 F4.1 arcsec ulim ?=0 bmaj-upper limit if bmaj=0.0 (2) 99-101 F3.1 arcsec beam Map beam size
Note (1): In units of microJanskeys/beam and uncorrected for primary beam or bandwidth smearing. Note (2): Or maximum size for very resolved sources.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 14-Jun-2010
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

© UDS/CNRS

Contact