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J/AZh/89/388 Flat-spectrum radio sources long-term variability (Gorshkov+, 2012)

Long-term variability of a complete sample of flat-spectrum radio sources at declinations 10°-12°30' (J2000). Gorshkov A.G., Konnikova V.K., Mingaliev M.G. <Astron. Zh. 89, 388 (2012)> =2012AZh....89..388G =2012ARep...56..345G
ADC_Keywords: Radio sources ; QSOs Abstract: The paper reports the results of ten-year centimeter-wavelength observations with the RATAN-600 radio telescope of a complete sample of 83 flat-spectrum sources from the GB6 catalog of the MGB Survey (Cat. VIII/40), with S4.85>200mJy at declinations 10°-12°30'. Starting in 2000, the observations were conducted simultaneously at six frequencies in the range 0.97-21.7GHz. Seventy-six sources (including 54 quasars) have been identified with optical objects, which have redshifts in the range z=0.331-3.601. Description: The observations were conducted on the Northern Sector of the RATAN-600 at 0.97, 2.3, 3.9 (4.85 since 2004), 7.7, 11.1, and 21.7GHz on September 6-November 26, 2000; May 31-September 10, 2001; October 31-November 10, 2001; June 19- September 23, 2002; May 15-August 19, 2004; December 1, 2005-March 12, 2006; September 18-29, 2006; May 1-30, 2007; October 7-28, 2007; June 17-September 1, 2008; September 4-20, 2009; December 21-29, 2009; January 4-13, 2010; June 12-July 8, 2010; September 26-October 17, 2010. In addition, the most variable sources were observed on February 21-28, 2005. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 57 83 Identifications and variability indices
See also: VII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010) VIII/40 : GB6 catalog of radio sources (Gregory+ 1996) J/MNRAS/329/700 : Optical IDs of JVAS using APM (Snellen+ 2002) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Radio right ascension (J2000) 4- 5 I2 min RAm Radio right ascension (J2000) 7- 12 F6.3 s RAs Radio right ascension (J2000) 14 A1 --- DE- Radio declination sign (J2000) 15- 16 I2 deg DEd Radio declination (J2000) 18- 19 I2 arcmin DEm Radio declination (J2000) 21- 25 F5.2 arcsec DEs Radio declination (J2000) 27- 28 A2 --- Cl [Q G L EF] Classification: Quasar, Galaxy, BL Lac object, or Empty Field 30- 34 F5.3 --- z ?=- Redshift of the optical counterpart 36- 37 I2 --- r_z ?=- Redshift reference (2) 39- 42 F4.1 mag Bmag ?=- USNO B magnitude 44- 47 F4.2 --- V7.7 ?=- Variability index at 7.7GHz (3) 49- 52 F4.2 --- V11.1 ?=- Variability index at 11.1GHz (3) 54- 57 F4.2 --- V21.7 ?=- Variability index at 21.7GHz (3)
Note (2): References as follows: 15 = Ceron-Cetty and Veron, 2010, Cat. VII/258 16 = Chavushyan et al., 2002ARep...46..697C 17 = Snellen et al., 2002, Cat. J/MNRAS/329/700 18 = Bisikalo et al., 2005ARep...49..701B 19 = Afanas'ev et al., 2006ARep...50..255A Note (3): The variability index is defined as: V=[(Smax-σmag)-(Smin+σmin)]/[(Smax-σmag)+(Smin+σmin)], where Smax and Smin are the maximum and minimum flux densities recorded during the ten-year observations, and σmax and σmin are the corresponding rms errors.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 05-Jun-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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