J/AJ/130/1977 FIRST-Optical-VLA survey for lensed radio lobes (Haarsma+, 2005)
The FIRST-Optical-VLA survey for lensed radio lobes.
Haarsma D.B., Winn J.N., Falco E.E., Kochanek C.S., Ammar P., Boersma C.,
Fogwell S., Muxlow T.W.B., Mcleod B.A., Lehar J.
<Astron. J., 130, 1977-1995 (2005)>
=2005AJ....130.1977H 2005AJ....130.1977H (SIMBAD/NED BibCode)
ADC_Keywords: Radio sources ; Galaxies, photometry ; Gravitational lensing ;
Radio continuum
Keywords: galaxies: individual (FOV J0743+1553) - galaxies: spiral -
gravitational lensing - radio continuum: galaxies
Abstract:
We present results from a survey for gravitationally lensed radio
lobes. Lensed lobes are a potentially richer source of information
about galaxy mass distributions than lensed point sources, which have
been the exclusive focus of other recent surveys. Our approach is to
identify radio lobes in the Faint Images of the Radio Sky at Twenty cm
(FIRST, Cat. VIII/71) catalog and then search optical catalogs for
coincident foreground galaxies, which are candidate lensing galaxies.
We then obtain higher resolution images of these targets at both
optical and radio wavelengths and obtain optical spectra for the most
promising candidates. We present maps of several radio lobes that are
nearly coincident with galaxies. We have not found any new and
unambiguous cases of gravitational lensing. One radio lobe in
particular, FOV J0743+1553, has two hot spots that could be multiple
images produced by a z=0.19 spiral galaxy, but the lensing
interpretation is problematic.
Description:
We obtained high-resolution VLA images for all 92 targets. Of these,
11 had been previously performed and were available in the VLA archive
or the literature. The remaining 81 targets were observed over 32.5hr
in four sessions in 2002 March. These observations took place when the
VLA was in the A configuration and employed the standard 6cm (5GHz)
band, giving a synthesized beam size of 0.4" FWHM.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 91 92 VLA observations of 92 targets
table2.dat 103 32 Optical data on 32 targets
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See also:
VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/72 : CLASS survey of radio sources (Myers+, 2003)
J/A+AS/115/235 : The Hamburg/ESO survey for bright QSOs. II. (Reimers+, 1996)
J/ApJS/143/1 : FIRST-APM Source Catalog (McMahon+, 2002)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [FOV]
5- 14 A10 --- FOV Source name (FOV JHHMM+DDMM)
18- 19 I2 h RAh Hour of Right Ascension (J2000.0)
21- 22 I2 min RAm Minute of Right Ascension (J2000.0)
24- 27 F4.1 s RAs Second of Right Ascension (J2000.0)
29 A1 --- DE- Sign of the Declination (J2000.0)
30- 31 I2 deg DEd Degree of Declination (J2000.0)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000.0)
36- 37 I2 arcsec DEs Arcsecond of Declination (J2000.0)
39- 40 I2 min ExpTime ? Exposure time
42 I1 cm Lambda ? Wavelength
44- 53 A10 "YYYY/MM/DD" ObsDate Date of observation
55- 91 A37 --- Com Comment
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [FOV]
5- 14 A10 --- FOV Source name (FOV JHHMM+DDMM)
16 A1 --- m_FOV [NSW] Multiplicity index on FOV
18- 19 I2 h RAh Hour of Right Ascension (J2000.0)
21- 22 I2 min RAm Minute of Right Ascension (J2000.0)
24- 28 F5.2 s RAs Second of Right Ascension (J2000.0)
30 A1 --- DE- Sign of the Declination (J2000.0)
31- 32 I2 deg DEd Degree of Declination (J2000.0)
34- 35 I2 arcmin DEm Arcminute of Declination (J2000.0)
37- 40 F4.1 arcsec DEs Arcsecond of Declination (J2000.0)
42- 49 A8 --- Cat Source of the lens candidate magnitude
51 A1 --- f_Rmag [Rri] Flag on Rmag indicating the band
52 A1 --- l_Rmag [>] Lower limit flag on Rmag
53- 56 F4.1 mag Rmag Red magnitude of the lens candidate
in the f_Rmag used
58 A1 --- f_Bmag [Bg] Flag on Bmag indicating the band
59 A1 --- l_Bmag [>] Lower limit flag on Bmag
60- 63 F4.1 mag Bmag Blue magnitude of the lens candidate
in the f_Bmag used
65- 73 A9 --- Tel Telescope used for CCD observations
75- 76 A2 --- Band [Iii'r ] Band used
78- 81 F4.2 arcsec Seeing ? Seeing
83- 94 A12 --- FWHM Lens FWHM in arcsec
96- 99 A4 --- VLAdet VLA core detection (Yes/No)
101-103 A3 --- CCDdet CCD core detection (Yes/No)
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History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 21-Feb-2006