J/MNRAS/376/1251 610MHz observations of Spitzer XFLS (Garn+, 2007)
Deep 610-MHz Giant Metrewave Radio Telescope observations of the Spitzer
extragalactic First Look Survey field.
I. Observations, data analysis and source catalogue.
Garn T., Green D.A., Hales S.E.G., Riley J.M., Alexander P.
<Mon. Not. R. Astron. Soc., 376, 1251-1260 (2007)>
=2007MNRAS.376.1251G 2007MNRAS.376.1251G
ADC_Keywords: Radio sources ; Surveys
Keywords: catalogues - surveys - radio continuum: general
Description:
Observations of the Spitzer extragalactic First Look Survey field
taken at 610MHz with the Giant Metre-wave Radio Telescope are
presented. Seven individual pointings were observed, covering a total
area of 4 square degrees with a resolution of 5.8x4.7arcsec2,
PA=60°. The r.m.s. noise at the centre of the pointings is between
27 and 30uJy before correction for the GMRT primary beam. The
techniques used for data reduction and production of a mosaicked image
of the region are described, and the final mosaic, along with a
catalogue of 3944 sources detected above ∼5σ are presented. The
survey complements existing radio and infrared data available for this
region.
For further details of the surveys and data analysis procedures please
refer to the published paper.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
gmrtfls.dat 87 3944 *GMRT FLS sourcelist of 3944 sources, Release 1.1
--------------------------------------------------------------------------------
Note on gmrtfls.dat: corresponds to the Release 1.1, see details in the
"History" section below. The release 1.0 is still available as the
file gmrtfls_v1.0.dat.
--------------------------------------------------------------------------------
See also:
J/A+A/424/371 : 1.4GHz First Look Survey (FLS) (Morganti+, 2004)
J/AJ/125/2411 : SIRTF First-Look Survey (Condon+, 2003)
J/AJ/128/1 : First Look Survey: NOAO R-band Mosaic (Fadda+, 2004)
J/AJ/131/250 : Spitzer 70 and 160um observations in xFLS (Frayer+, 2006)
Byte-by-byte Description of file: gmrtfls.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- --- [FLSGMRT_]
9- 24 A16 --- FLSGMRT FLSGMRT name (JHHMMSS.s+DDMMSS)
26- 27 I2 h RAh Centroid position right ascension (J2000)
29- 30 I2 min RAm Centroid position right ascension (J2000)
32- 36 F5.2 s RAs Centroid position right ascension (J2000)
38 A1 - DE- Centroid position declination sign (J2000)
39- 40 I2 deg DEd Centroid position declination (J2000)
42- 43 I2 arcmin DEm Centroid position declination (J2000)
45- 48 F4.1 arcsec DEs Centroid position declination (J2000)
50- 56 F7.3 mJy Speak Peak pixel brightness at 610MHz (in mJy/beam)
58- 61 I4 uJy rms Local rms noise (in uJy/beam)
63- 69 F7.3 mJy Sint Integrated flux at 610MHz
71- 75 F5.3 mJy e_Sint Error on integrated flux
77- 80 I4 pix Xpos Centroid X pixel location (nearest pixel)
82- 85 I4 pix Ypos Centroid Y pixel location (nearest pixel)
87 I1 --- Flags [0/1] Source Extractor split (1)
--------------------------------------------------------------------------------
Note (1):
1 = source has been split up into two or more components
--------------------------------------------------------------------------------
Acknowledgements:
T. Garn, tsg25(at)cam.ac.uk
History:
* 10-May-2007: release 1.0 of the catalog (gmrtfls_v1.0.dat)
* 05-May-2008: release 1.1 by Sally Hales (MRAO Cambridge):
A rounding error in the right ascension and declination positions
listed for some sources has been corrected. The source IAU
designations remain unchanged, having been based on the correctly
computed positions throughout. The main purpose in correcting the
positions was to eliminate sporadic mismatches betweeen IAU
designation and listed position in the first data release.
In other respects the effect on the positions is negligible.
(End) Timothy Garn [MRAO], Patricia Vannier [CDS] 05-May-2008