J/MNRAS/409/821 Radio sources with ultrahigh polarization (Shi+, 2010)
Radio sources with ultrahigh polarization.
Shi H., Liang H., Han J.L., Hunstead R.W.
<Mon. Not. R. Astron. Soc., 409, 821-838 (2010)>
=2010MNRAS.409..821S 2010MNRAS.409..821S
ADC_Keywords: Radio sources ; Polarization
Keywords: polarization - pulsars: general - galaxies: magnetic fields -
radio continuum: galaxies
Abstract:
A sample of 129 unresolved radio sources with ultrahigh linear
polarization (>30%) has been selected from the NRAO VLA Sky Survey.
Such high average linear polarization is unusual in extragalactic
sources. Higher resolution Australia Telescope Compact Array and Very
Large Array observations confirm the high average polarization but
find that most of these sources are extended. The Sloan Digital Sky
Survey spectroscopy, where available, shows that the optical
counterparts are elliptical galaxies with no detectable emission
lines. The optical spectra, radio luminosity, linear size and
spectral index of these sources are typical of radio-loud active
galactic nuclei.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 57 129 The sample of 129 ultrahigh polarization radio
sources selected from the NVSS
table2.dat 86 56 High-resolution observations at 1.4GHz with the
ATCA, VLA and FIRST survey
table4.dat 82 22 Optical identifications with the SDSS
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See also:
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- NVSS NVSS source name (JHHMMSS+DDMMSS)
15 A1 --- n_NVSS [a] a for Known pulsar
17- 21 F5.1 deg GLON Galactic longitude
23- 27 F5.1 deg GLAT Galactic latitude
29- 32 F4.1 mJy S1.4 Flux density in the NVSS
34- 36 F3.1 mJy e_S1.4 rms uncertainty on S1.4
38- 41 F4.1 mJy Spol Linearly polarized flux density in NVSS
43- 45 F3.1 mJy e_Spol rms uncertainty on Spol
47- 48 I2 % Pol [0/99] Percentage polarization in the NVSS
50- 51 I2 % e_Pol [0/99] rms uncertainty on Pol
53- 55 I3 deg polPA Polarization position angle (N to E) in the NVSS
57 I1 deg e_polPA rms uncertainty on PApol
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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- 5 A5 --- Survey Survey name
7- 20 A14 --- NVSS NVSS source name (JHHMMSS+DDMMSS)
21 A1 --- n_NVSS [ab] Pulsar or binary source (1)
23- 24 I2 h RAh ? Right ascension (J2000) from high-resolution
radio observations (ATCA, VLA or FIRST)
26- 27 I2 min RAm ? Right ascension (J2000) from high-resolution
radio observations (ATCA, VLA or FIRST)
29- 33 F5.2 s RAs ? Right ascension (J2000) from high-resolution
radio observations (ATCA, VLA or FIRST)
35 A1 --- DE- Declination sign (J2000) from high-resolution
radio observations (ATCA, VLA or FIRST)
36- 37 I2 deg DEd ? Declination (J2000) from high-resolution
radio observations (ATCA, VLA or FIRST)
39- 40 I2 arcmin DEm ? Declination (J2000) from high-resolution
radio observations (ATCA, VLA or FIRST)
42- 45 F4.1 arcsec DEs ? Declination (J2000) from high-resolution
radio observations (ATCA, VLA or FIRST)
47- 50 F4.1 arcsec offNR ? Position offset between NVSS position and
the peak position from high-resolution
radio images
52 A1 --- l_Size1 Limit flag on Size
53- 54 I2 arcsec Size1 ? Deconvolved size of source (2)
55 A1 --- --- [x]
56 I1 arcsec Size2 ? Deconvolved size of source (2)
58- 62 F5.1 deg PA ? Position angle (N to E) of source
64- 67 F4.1 mJy Ipeak ? Peak flux density (in mJy/beam) in the
high-resolution radio observations
69- 72 F4.2 mJy rms rms noise (in mJy/beam) in the high-resolution
radio observations
74- 77 F4.1 mJy Iint ? Integrated flux density in the
high-resolution radio observations
79- 82 F4.1 mJy S1.4 ? Flux density in the NVSS
84- 86 F3.1 mJy e_S1.4 rms uncertainty on S1.4
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Note (1): Notes as follows:
a = Known pulsar
b = Clearly resolved into two sources in radio high-resolution observations
(the listed coordinate is an average of the two peak positions).
Note (2): For FIRST observations, the deconvolved sizes are from the FIRST
catalogue and a source is unresolved if the deconvolved size is <2".
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- NVSS NVSS source name (JHHMMSS+DDMMSS)
16- 17 I2 h RAh Right ascension (J2000) of optical
identification in the SDSS
19- 20 I2 min RAm Right ascension (J2000) of optical
identification in the SDSS
22- 26 F5.2 s RAs Right ascension (J2000) of optical
identification in the SDSS
28 A1 --- DE- Declination sign (J2000) of optical
identification in the SDSS
29- 30 I2 deg DEd Declination (J2000) of optical identification
in the SDSS
32- 33 I2 arcmin DEm Declination (J2000) of optical identification
in the SDSS
35- 38 F4.1 arcsec DEs Declination (J2000) of optical identification
in the SDSS
40- 42 F3.1 arcsec offRS Position offset between the FIRST survey
and SDSS
43 A1 --- n_offRS [a] a when Distance from optical identification
to central axis of the radio source
45- 49 F5.2 mag gmag g-band magnitude from the SDSS corrected
for extinction
51- 55 F5.2 mag imag i-band magnitude from the SDSS corrected
for extinction
57- 59 F3.1 arcsec offR2 ? Position offset between the FIRST survey
and 2MASS (blank if not detected in 2MASS)
60 A1 --- n_offR2 [a] a when Distance from optical identification
to central axis of the radio source
61- 65 F5.2 mag Kmag ? 2MASS Ks-band magnitude (blank when not
detected in the 2MASS)
67- 72 F6.4 --- z Redshift from the SDSS
74- 79 F6.4 --- e_z rms uncertainty on z
80 A1 --- n_z [p] p when photometric redshift
82 A1 --- Type [EL] type of identifications: Elliptical
galaxy or LINER.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Jun-2011