Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.sao.ru/cats/doc/AGN_Condon.html
Дата изменения: Wed Mar 18 12:25:11 2015
Дата индексирования: Sun Apr 10 04:10:57 2016
Кодировка:
Поисковые слова: m8
Complete samples of active extragalactic objects. I.
A 1411-MHz VLA survey centered on alpha= 12h04min, delta= +11deg30min
Condon J.J., Condon M.A., Hazard C.
Abstract:
As one part of a program to detect complete samples of active
extragalactic objects, the 3.36x10^-3 sr field centered on
alpha=12h04min, delta=+11deg30' (1950.0) was mapped with the Very
Large Array at 1411MHz. Sixty-seven maps cover this field so that no
point is more than 15arcmin from the nearest map center. The median
map noise is 0.6mJy, and the 6sigma completeness limit is less than
6mJy over half of the survey field. The synthesized point-source
response is an elliptical Gaussian 22x18arcsec between half-intensity
points. The rms source-position uncertainties are ~1arcsec in each
coordinate so that reliable optical identifications can be made on the
basis of radio-optical position coincidence alone. The sky density of
sources with flux densities 5 < S < 150mJy and the angular-size
distribution of sources between 30 and 150mJy were determined.
1982AJ.....87.1429C
Complete samples of active extragalactic objects. II.
A deep 1.452-GHz VLA survey centered on 08:52:15+17:16
Condon J.J., Mitchell K.J.
Abstract:
A single primary-beam area centered on alpha=08h52m16s, Delta=+17d16'
(1950.0) was surveyed with the Very Large Array at 1.452 GHz. The rms
map noise is 0.030 + 0.001 mJy, and the resulting source list is
complete to a map peak flux density S_p = 0.2 mJy within 25 arcmin of
the field center. Source counts between 0.2 and 5 mJy were determined.
Our best-fit model for the counts suggests that the faintest sources
have absolute radio luminosities L < 10^24 W/Hz and do not evolve
significantly. Sources stronger than 0.2 mJy appear to account for
most of the radio-source background. The rms sky-temperature
fluctuation in the central 10'x10' of the map is less than 0.029 K
(>99% confidence) on an angular scale ~19 arcsec. This limit
constrains theories which attribute the cosmic microwave background to
thermalized radiation from massive pregalactic stars or bursts of star
formation in young galaxies.
1985AJ.....90.1437C
Complete samples of active extragalactic objects. III.
A 1411 MHz VLA survey.
Coleman P.H., Condon J.J., Hazard C.
Abstract:
Three selected fields were observed with the Very Large Array (VLA) at
1411MHz as part of an ongoing project to compile complete samples of
active extragalactic objects. The radio-source list for the field "A"
centered on alpha=08h54m, delta=+17d30' is presented. 67 maps cover
the area 3x3deg so that every point lies within at least one primary
half-power beamwidth. The median map noise is 0.5mJy and the 6{sigma}
completeness level is less than 6mJy over half the field. The
synthesized point-source response is an elliptical Gaussian
approximately 20x17" between half-intensity points. The areal density
of sources with flux densities in the range 5 < S < 150mJy was determined.
Optical identifications based on position coincidences with 90 objects
brighter than B=~21.5 in the A and B survey fields are reported.