J/AZh/84/387 Radio sources near North Celestial Pole (Mingaliev+, 2007)
Spectral characteristics of radio sources near the North Celestial Pole.
Mingaliev M.G., Sotnikova Yu.V., Bursov N.N., Kardashev N.S., Larionov M.G.
<Astron. Zh. 84, 387 (2007)>
=2007AZh....84..387M 2007AZh....84..387M
=2007ARep...51..343M 2007ARep...51..343M
ADC_Keywords: Radio sources ; Galactic pole, north
Abstract:
We have used the RATAN-600 radio telescope to study the spectral
characteristics of a uniform sample of 504 radio sources from the NVSS
catalog (Cat. VIII/65) near the North Celestial Pole at 6 frequencies
from 1.1 to 21.7GHz, with the aim of selecting sources possessing
inverted spectra near 22GHz, to be included in the program of the
RadioAstron future space VLBI mission. We found 17 radio sources with
the desired spectral characteristics. Data from spectral studies over
a wide wavelength range testify that the spectral behavior of our
sample differs from that for a complete sample of sources with the
same initial parameters but selected at 20GHz. We find a 6% deficit
of inverted-spectrum sources, which can be explained as an effect of
the spectral characteristics of "sub-threshold" sources that were not
included in the initial sample at 1.4GHz.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 116 496 Obtained values of flux densities for radio
sources near the North Celestial Pole
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See also:
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Source name (HHMMSS+SSMMSS, J2000) (1)
14 A1 --- n_Name [*] Note for RATAN objects with more than one
possible SDSS counterpart (1)
15- 20 F6.1 mJy S21.7 ?=- Flux density at 21.7GHz
22- 26 F5.1 mJy e_S21.7 ?=- rms uncertainty on S21.7
28- 33 F6.1 mJy S11.2 ?=- Flux density at 11.2GHz
35- 39 F5.1 mJy e_S11.2 ?=- rms uncertainty on S11.2
41- 46 F6.1 mJy S7.7 ?=- Flux density at 7.7GHz
48- 52 F5.1 mJy e_S7.7 ?=- rms uncertainty on S7.7
54- 59 F6.1 mJy S4.8 ?=- Flux density at 4.8GHz
61- 65 F5.1 mJy e_S4.8 ?=- rms uncertainty on S4.8
67- 72 F6.1 mJy S2.3 ?=- Flux density at 2.3GHz
74- 78 F5.1 mJy e_S2.3 ?=- rms uncertainty on S2.3
80- 86 F7.1 mJy S1.1 ?=- Flux density at 1.1GHz
88- 92 F5.1 mJy e_S1.1 ?=- rms uncertainty on S1.1
94- 98 A5 --- MType1 Morphological type (2)
99 A1 --- --- [/]
100-105 A6 --- MType2 Second morphological type (2)
107-111 F5.3 --- z ? Redshift
112 A1 --- --- [/]
113-116 F4.2 --- z2 ? Second redshift
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Note (1): Some NVSS objects were complex group of objects that were not
fully resolved, mainly due to the insufficient resolution of the
RANTAN-600 in declination. Their flux densities are sums of the flux
density of their individual components, weighted over the beam of the
southern sector of the RATAN-600.
These sources are:
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Name in Table5 NVSS names
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J0222XX+86XXXX = J022235+861727 J022248+861851 J022249+862027
J1842XX+794XXX = J184214+794613 J184226+794517 J184233+794619
J0630XX+7632XX = J063012+763245 J063031+763257
J18453X+81XXXX = J184534+815016 J184539+814943
J1607XX+850XXX = J160701+850215 J160752+850131
J21181X+751XXX = J211814+751203 J211817+751112
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Note (2): Type as G=Galaxy, QSO, or GPair = pair of galaxies.
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History:
From electronic version of the journal
* 13-Apr-2008: Insert into VizieR
* 21-Jul-2023: Coordinates for NVSS 001816+782743 corrected.
(End) Patricia Vannier [CDS] 08-Jan-2008