J/A+A/424/371 1.4GHz First Look Survey (FLS) (Morganti+, 2004)
A Deep WSRT 1.4 GHz Radio Survey of the Spitzer Space Telescope FLSv Region
Morganti R. Garrett M.A., Chapman S., Baan W., Helou G., Soifer T.
<Astron. Astrophys. 424, 371 (2004)>
=2004A&A...424..371M 2004A&A...424..371M
ADC_Keywords: Galaxies, radio ; Interferometry ; Positional data ;
Radio continuum ; Radio sources
Keywords: catalogues - galaxies: active - galaxies: starburst -
infrared: galaxies - radio continuum: galaxies - surveys
Abstract:
The First Look Survey (FLS) is the first scientific product to emerge
from the Spitzer Space Telescope. A small region of this field (the
verification strip) has been imaged very deeply, permitting the
detection of cosmologically distant sources. We present Westerbork
Synthesis Radio Telescope (WSRT) observations of this region,
encompassing a 1 sq. deg field, centred on the verification strip
(J2000 RA=17:17:00.00, DE=59:45:00.000). The radio images reach a
noise level of 8.5 microJy per beam - the deepest WSRT image made to
date. We summarise here the first results from the project, and
present the final mosaic image, together with a list of detected
sources. The effect of source confusion on the position, size and flux
density of the faintest sources in the source catalogue are also
addressed. The results of a serendipitous search for HI emission in
the field are also presented. Using a subset of the data, we clearly
detect HI emission associated with four galaxies in the central region
of the FLSv. These are identified with nearby, massive galaxies.
Description:
A radio source catalogue derived from Westerbork Synthesis Radio
Telescope (WSRT) 1.2-1.4 GHz observations of a region, encompassing a
1 sq. deg field, centred on the Spitzer "First Look Survey"
Verification Strip (J2000 RA=17:17:00.00, DE=59:45:00.000). The
results of fitting Guassian components to each of the radio sources
detected is presented here. The fitting results include a measured
position, integrated flux density, major/minor axes size and major
axis position angle. In addition, the local, 1-sigma r.m.s. noise
level in the vicinity of each source is also reported. This
information is presented for a total of 1048 radio sources in the
field.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 58 1048 Fitting parameters for 1048 radio sources
in the Spitzer FLS region
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 12 F6.3 s RAs Right ascension (J2000.0)
14 A1 --- DE- Sign of Declination (J2000.0)
15- 16 I2 deg DEd Declination (J2000.0)
18- 19 I2 arcmin DEm Declination (J2000.0)
21- 25 F5.2 arcsec DEs Declination (J2000.0)
27- 33 F7.3 mJy Sint Integrated 1.4GHz Flux Density
35- 39 F5.1 arcsec MajAxis Major Axis
41- 44 F4.1 arcsec MinAxis Minor Axis
46- 50 F5.1 deg PA [-90/90] Position Angle (1)
52- 57 F6.4 mJy RMS Local RMS Noise level
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Note (1): The Position Angle is measured positive in the sense North through
East.
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Acknowledgements: Raffaella Morganti
(End) Raffaella Morganti [ASTRON, The Netherlands] 01-Jun-2004