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 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)iku.edu.tr
References:
Arias et al., 1988A&A...199..357A 1988A&A...199..357A
Aslan et al., 2005KFNT....5..533A 2005KFNT....5..533A
Assafin et al., 2003AJ....125.2728A 2003AJ....125.2728A, Cat. J/AJ/125/2728
Kouprianov, 2008ADVSR..41.1029K 2008ADVSR..41.1029K
Lindegren & Kovalevsky, 1995A&A...304..189L 1995A&A...304..189L
Ma, 2001PVLBI.R....187M
Ma, 2008IAUS..248..337M 2008IAUS..248..337M
Ma et al., 1998AJ....116..516M 1998AJ....116..516M, Cat, I/251
Mignard, 2003IAUJD.R....133M
Zacharias et al., 2004AJ....127.3043Z 2004AJ....127.3043Z, Cat. I/289
(End) Z. Aslan [Istanbul Kultur Univ.], Patricia Vannier [CDS] 10-Dec-2009