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VIII/41 The UTR-2 Very Low-Frequency Sky Survey Data (Braude+ 1978-1982)
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The UTR-2 Very Low-Frequency Sky Survey Data
Decametric survey of discrete sources in the northern sky.
II. Source catalogue in the range of declinations +10 to +20
Braude S.Ya., Megn A.V., Rashokovski S.L., Ryabov B.P., Sharykin N.K.,
Sokolov K.P., Tkatchenko A.P., Zhouk I.N.
<Astrophys. Space Sci., 54, 37 (1978)>
=1978Ap&SS..54...37B
Decametric survey of discrete sources in the northern sky.
V. Source catalogue in the range of declinations 0 to +10.
Braude S.Ya., Megn A.V., Sokolov K.P., Tkatchenko A.P., Sharykin N.K.
<Astrophys. Space Sci., 64, 73 (1979)>
=1979Ap&SS..64...73B
Decametric survey of discrete sources.
VII. Source catalogue in the range of declination -2 to -13.
Braude S.Ya., Miroshnitchenko A.P., Sokolov K.P., Sharykin N.K.
<Astrophys. Space Sci., 74, 409 (1981)>
=1981Ap&SS..74..409B
Decametric survey of discrete sources in the northern sky.
IX. Source catalogue in the declination range 52 to 60.
Braude S.Ya., Sharykin N.K., Sokolov K.P., Zakcharenko S.M.
<Astrophys. Space Sci., 111, 1 (1985)>
=1985Ap&SS.111....1B
Decametric survey of discrete sources in the northern sky.
XI. The results of the UTR-2 very low-frequency sky survey in the declination
range 41 deg. to 52
Braude S.Ya., Sokolov K.P., Zakcharenko S.M.
<Astrophys. Space Sci., 213, 1 (1994)>
=1994Ap&SS.213....1B
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ADC_Keywords: Radio sources
Description:
The results of the very-low frequency (16.7MHz) survey of discrete
sources made with the UTR-2 radio telescope is presented. The survey
concerns the declination zones -13{deg} to -2{deg}, 0{deg} to 20{deg},
and 41{deg} to 60{deg}. The UTR-2 radio source catalogue contains an
estimate of the coordinates and flux densities of 1819 sources
measured at a number of the lowest frequencies used in contemporary
radio astronomy within the range from 10 to 25 MHz.
The catalogue is made of two parts:
mean.dat: the averaged values of the coordinates and the corresponding
errors, the source flux-density at the middle UTR-2 frequency 16.7 MHz
as obtained from measured spectrum of the source at all UTR-2
frequencies and its error, the value of measured low-frequency
spectral index with respect to which the estimate of has been
obtained, the parameter W characterizing the integral reliability of
the obtained source estimates and the corresponding object name from
higher-frequency radio survey provided the source has been identified.
To indicate the integral readability of the source parameters obtained
we used the symbols A, B and C. These reliability estimates take into
account the total number of measurements, coordinate scatter, number
of frequencies and hour-angle settings at which the source parameters
have been evaluated. The highly reliable observation results have been
marked with symbol A . The sources whose parameters can be used
without an additional analysis are marked with B and sources whose
parameters are to be used with care have been marked with C.
data.dat: this file contains the experimental estimates of the source
coordinates and flux densities as well as their errors at each
operating frequency of the UTR-2 in the order of their increasing; the
total number (N) of successive observations according to which the
estimates were obtained and the number of different hour-angle
settings (NRA) of the reception pattern at which the source was
observed. In cases when the observations did not allow us to obtain a
reliable estimates of a source flux density the catalogue contains
only their upper limits which are not accompanied by errors. The
approximated values of as well as low-frequency spectral indices are
presented only for those sources which have flux density estimates
obtained at not less than three different UTR-2 frequencies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mean.dat 112 1819 Averaged values and cross-identifications
data.dat 59 8094 Experimental estimates at each operating
frequency of the UTR-2
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Byte-by-byte Description of file: mean.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name *Source name (individual data in file data.dat)
15- 16 I2 h RAh Right ascension (1950)
18- 19 I2 min RAm Right ascension (1950)
21- 22 I2 s RAs Right ascension (1950)
24- 26 I3 s e_RAs rms uncertainty on RAs
28- 33 F6.2 deg DEdeg Declination (1950)
35- 39 F5.2 deg e_DEdeg rms uncertainty on DEdeg
41- 44 F4.1 MHz Freq ? Frequency
46 A1 --- l_S Limit flag on fLux density
47- 50 I4 Jy S ? Flux-density at frequency Freq
52- 54 I3 % e_S ? rms uncertainty on flux density
62- 65 F4.1 --- SI ? Low-frequency spectral index
67- 69 F3.1 --- e_SI ? rms uncertainty on SI
71 A1 --- W *[ABC] Integrated estimate of reliability
74-112 A39 --- OtherName Other names
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Note on Name: the name includes the publication number (2,5,7,9,11),
"GRB" (the B indicates that 1950 positions are used in the name).
hours and minutes of RA(1950), and degrees of Declination(1950).
Up to 6 lines in file data.dat contain the experimental estimates
of the source coordinates and flux densities as well as their errors
at each operating frequency of the UTR-2.
Note on W: the reliability index takes the values:
A: Highly reliable data
B: Results that can be used without an additional analysis
C: Data requiring additional analysis, up to an examination of the
original analogue records
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Byte-by-byte Description of file: data.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name *Source name, as in file mean.dat
15- 16 I2 h RAh Right ascension (1950)
18- 19 I2 min RAm Right ascension (1950)
21- 22 I2 s RAs Right ascension (1950)
24- 26 I3 s e_RAs rms uncertainty on RAs
28- 33 F6.2 deg DEdeg Declination (1950)
35- 39 F5.2 deg e_DEdeg rms uncertainty on DEdeg
41- 44 F4.1 MHz Freq Frequency
46 A1 --- l_S Limit flag on fLux density
47- 50 I4 Jy S Flux-density at frequency Freq
52- 54 I3 % e_S ? rms uncertainty on flux density
56- 57 I2 --- N Total number of successful measurements
59 I1 --- NRA Number of angular positions on RA of the
reception pattern at which the source was
observed
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Note on Name: the name includes the publication number (2,5,7,9,11),
"GRB" (the B indicates that 1950 positions are used in the name).
hours and minutes of RA(1950), and degrees of Declination(1950).
Up to 6 lines in file data.dat contain the experimental estimates
of the source coordinates and flux densities as well as their errors
at each operating frequency of the UTR-2.
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Acknowledgements:
For any information concerning to the UTR-2 Very Low-Frequency Sky
Survey, please, contact to:
Dr. K.P. Sokolov
Institute of Rsdio Astronomy
4, Krasnoznamennaya Street
Kharkov 310002
UKRAINE
E-mail:rai@ira.kharkov.ua
FAX: 38 (0572) 47-65-06
Phone: 38 (0572) 45-10-14 (office), 38 0572-44-09-37 (home)
References:
Braude S.Ya. et al., Paper I., The UTR-2 Radio Telescope.
Experimental Techniques and Data Processing =1978Ap&SS..54....3B
Braude S.Ya. et al., Paper II., 10{deg} < DE < 20{deg} =1978Ap&SS..54...37B
Braude S.Ya. et al., Paper IV., Spectra =1978Ap&SS..54..145B
Braude S.Ya. et al., Paper V., 0{deg} < DE < 10{deg} =1979Ap&SS..64...73B
Braude S.Ya. et al., Paper VI., Spectra =1979Ap&SS..64..127B
Braude S.Ya. et al., Paper VII., -2{deg}< DE <-13{deg} =1981Ap&SS..74..409B
Braude S.Ya. et al., Paper VIII., Spectra =1981Ap&SS..76..279B
Braude S.Ya. et al., Paper IX., 52{deg} < DE < 60{deg} =1985Ap&SS.111....1B
Braude S.Ya. et al., Paper X., Spectra =1985Ap&SS.111..237B
Braude S.Ya. et al., Paper XI., 41{deg} < DE < 52{deg} =1994Ap&SS.213....1B
Braude S.Ya. et al., Paper XII., Spectra =1995Ap&SS.226..245B
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(End) K.P. Sokolov [Ukrainia], Francois Ochsenbein [CDS] 15-Sep-1997