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J/A+A/510/A10       Astrometric positions of radio sources       (Aslan+, 2010)

Optical counterpart positions of extragalactic radio sources and connecting optical and radio reference frames. Aslan Z., Gumerov R., Jin W., Khamitov I., Maigurova N., Pinigin G., Tang Z., Wang S. <Astron. Astrophys. 510, A10 (2010)> =2010A&A...510A..10A
ADC_Keywords: Radio sources ; Positional data Keywords: astrometry - reference systems Abstract: We discuss the results of an investigation of astrometric positions of extragalactic radio sources from a list for the International Celestial Reference Frame. Description: We present astrometric positions of the optical counterparts of about 300 ICRF radio sources. The observations were performed using two telescopes equipped with CCD cameras at the TUBITAK National Observatory (TUG), Turkey (1.5m Russian-Turkish Telescope - RTT150) and at Yunnan Astronomical Observatory (YAO) (1m telescope), China). The observations were completed for the declination range between -40° and 80° and with uniform distribution over right ascension. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 81 130 Positions of 126 extragalactic radio sources with respect to the UCAC2 catalogue table3.dat 81 182 Results of reductions of the 171 extragalactic radio sources with respect to the 2MASS catalogue
See also: I/289 : UCAC2 Catalogue (Zacharias+ 2004) I/315 : UCAC3 Catalogue (Zacharias+ 2009) I/251 : VLBI International Celestial Reference Frame (ICRF) (Ma+, 1997) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/AJ/125/2728 : Optical positions of ICRF sources (Assafin+, 2003) J/AJ/127/3587 : VLBI ICRF. II (Fey+, 2004) Byte-by-byte Description of file: table2.dat table3.dat
Bytes Format Units Label Explanations
1- 8 A8 -- IERS ICRF source designation (HHMM+DDd), IERS BHHMM+DDd in Simbad 10- 11 I2 h RAh Right ascension (J2000) 13- 14 I2 min RAm Right ascension (J2000) 16- 21 F6.3 s RAs Right ascension (J2000) 23- 25 I3 mas e_RAs Measuring error (s.e) in right ascension 27 A1 --- DE- Declination sign (J2000) 28- 29 I2 deg DEd Declination (J2000) 31- 32 I2 arcmin DEm Declination (J2000) 34- 39 F6.3 arcsec DEs Declination (J2000) 41- 43 I3 mas e_DEs Measuring error (s.e)in declination 45- 48 I4 mas oRA Optical-minus-radio position offset in right ascension, ΔRA*cosDE 50- 53 I4 mas oDE Optical-minus-radio position offset in declination 55- 57 I3 mas sRA Dispersions in right ascension, which measures the accuracy of the plate transformation 59- 61 I3 mas sDE Dispersion in declination, which measures the accuracy of the plate transformation 63- 65 I3 -- Nst Number of reference stars 67- 68 I2 -- Nfr Number of frames 70- 73 A4 -- Tel Telescope and place of observation (1) 75- 81 F7.2 -- Epoch Mean epoch of observation
Note (1): Telescopes code as follows: YAO = Yunnan Astronomical Observatory, 1m telescope RTT1 = RTT150 telescope + ST8 CCD camera RTT2 = RTT150 telescope + Andor CCD camera
Acknowledgements: Z. Aslan, z.aslan(at) References: Arias et al., 1988A&A...199..357A Aslan et al., 2005KFNT....5..533A Assafin et al., 2003AJ....125.2728A, Cat. J/AJ/125/2728 Kouprianov, 2008ADVSR..41.1029K Lindegren & Kovalevsky, 1995A&A...304..189L Ma, 2001PVLBI.R....187M Ma, 2008IAUS..248..337M Ma et al., 1998AJ....116..516M, Cat, I/251 Mignard, 2003IAUJD.R....133M Zacharias et al., 2004AJ....127.3043Z, Cat. I/289
(End) Z. Aslan [Istanbul Kultur Univ.], Patricia Vannier [CDS] 10-Dec-2009
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