NDLI: Proper motions of 59 766 stars absolutized using galaxies in 149 sky fields (PUL2)

Content Provider	Springer Nature Link
Author	Bobylev, V. V. Bronnikova, N. M. Shakht, N. A.
Copyright Year	2004
Abstract	The PUL2 catalog has been photographically compiled in Pulkovo according to Deutch's plan. The catalog contains the mean coordinates of stars in the ICRS system at epoch J2000.0 and their original absolute proper motions. The photographic observations were performed with a normal astrograph. The first and second epochs of the photographic plates are 1937–1965 and 1969–1986, respectively. The PUL2 fields uniformly cover the northern sky. The mean difference between the epochs is 24 years. At least three pairs of plates are available for each field. There are one-hour and five-minute exposures on all plates. One pair of plates was taken with a diffraction grating. Only bright reference stars were measured on the pairs of plates with a grating. Based on a reduction model with six constants and using faint ( $$15\mathop m\limits_. 2$$ ) reference stars, we determined the relative proper motions of the stars. We used ∼700 galaxies for absolutization. The mean errors in the relative proper motions of the PUL2 stars are 5.5 mas yr$^{−1}$ (milliarcseconds per year) in μ$_{α}$ cos δ and 5.9 mas yr$^{−1}$ in μ$_{δ}$. When using galaxies, the mean absolutization error is 7.9 mas yr$^{−1}$ in both coordinates. By comparing the PUL2 and HIPPARCOS catalogs, we determined the components of the residual rotation vector ω for HIPPARCOS relative to the extragalactic (equatorial) coordinate system: ω$_{x,y,z}$=(−0.98, −0.03, −1.66)±(0.47, 0.38, 0.42) mas yr$^{−1}$. The mean error of one absolute proper motion of a bright PUL2 star in external convergence is 9 mas yr$^{−1}$ in both coordinates.
Starting Page	469
Ending Page	479
Page Count	11
File Format	PDF
ISSN	10637737
Journal	Astronomy Letters
Volume Number	30
Issue Number	7
e-ISSN	15626873
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2004-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	star clusters associations stellar dynamics astrometry catalogs ICRS system absolute proper motions Astronomy Astrophysics
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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