1997A&AS..122..433T


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.07CEST22:03:52

1997A&AS..122..433T - Astron. Astrophys., Suppl. Ser., 122, 433-440 (1997/May-1)

The Bonn contribution to the extragalactic link of the Hipparcos proper motion system.

TUCHOLKE H.-J., BROSCHE P. and ODENKIRCHEN M.

Abstract (from CDS):

In order to calibrate the proper motions of the Hipparcos astrometry satellite, our group has measured accurate absolute proper motions of Hipparcos stars in small fields around optically bright extragalactic radio sources or bright galaxies with star-like features. In addition, we also use fields where relative proper motions are calibrated by measurements of large numbers of stars and galaxies on wide-field plates. The median internal accuracy of our relative proper motions, based on photographic plates with epoch differences up to 100-years (typically 70-years), is 1.0-milliarcsec/year (mas/a), while the calibration to an inertial system in each of the 13 fields has a median uncertainty of 1.3mas/a. We compute the rotation from the Hipparcos proper motions (median internal errors 0.9mas/a) to the extragalactic reference frame represented by our absolute proper motions, using 88 stars in common. The three components of the angular elocity vector have internal errors of 0.3mas/a. Our rotation solution has been used together with those of independent groups for the extragalactic calibration of the Hipparcos proper motion system (Kovalevsky et al. 1996, A&A, submitted). It compares favourably with the adopted mean solution.

Abstract Copyright:

Journal keyword(s): reference systems - astrometry - quasars: general - BL Lac objects: general

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 2079 1
2 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 4059 5
3 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 510 0
4 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5433 1
5 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3925 4
6 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2310 0
7 QSO B1404+286 BLL 14 07 00.3933203928 +28 27 14.695133019   16.13 15.35 10.29   ~ 699 2
8 M 12 GlC 16 47 14.18 -01 56 54.7   8.52 6.07     ~ 599 0
9 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1942 0
10 3C 371 BLL 18 06 50.6803567107 +69 49 28.108152993   14.77 14.22 11.39   ~ 810 2
11 ICRF J184208.9+794617 Sy1 18 42 08.9910523393 +79 46 17.129210139   16.06 15.38     ~ 1234 0
12 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 928 1

    Equat.    Gal    SGal    Ecl

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2021.05.07-22:03:52

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