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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 =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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 116 496 Obtained values of flux densities for radio sources near the North Celestial Pole
See also: VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998) Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
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
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: ------------------------------------------------------------- Name in Table5 NVSS names ------------------------------------------------------------- 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 ------------------------------------------------------------- Note (2): Type as G=Galaxy, QSO, or GPair = pair of galaxies.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Jan-2008
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