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Systematic Differences between positions and Proper Motions of stars from the PPMXL and UCAC4 Catalogs. / Vityazev, V. V.; Tsvetkov, A. S.

In: Astronomy Letters, Vol. 41, No. 7, 2015, p. 317-333.

Research output: Contribution to journal › Article › peer-review

Harvard

Vityazev, VV & Tsvetkov, AS 2015, 'Systematic Differences between positions and Proper Motions of stars from the PPMXL and UCAC4 Catalogs', Astronomy Letters, vol. 41, no. 7, pp. 317-333. https://doi.org/10.1134/S1063773715070063, https://doi.org/DOI: 10.1134/S1063773715070063

APA

Vityazev, V. V., & Tsvetkov, A. S. (2015). Systematic Differences between positions and Proper Motions of stars from the PPMXL and UCAC4 Catalogs. Astronomy Letters, 41(7), 317-333. https://doi.org/10.1134/S1063773715070063, https://doi.org/DOI: 10.1134/S1063773715070063

Vancouver

Vityazev VV, Tsvetkov AS. Systematic Differences between positions and Proper Motions of stars from the PPMXL and UCAC4 Catalogs. Astronomy Letters. 2015;41(7):317-333. https://doi.org/10.1134/S1063773715070063, https://doi.org/DOI: 10.1134/S1063773715070063

Author

Vityazev, V. V. ; Tsvetkov, A. S. / Systematic Differences between positions and Proper Motions of stars from the PPMXL and UCAC4 Catalogs. In: Astronomy Letters. 2015 ; Vol. 41, No. 7. pp. 317-333.

BibTeX

@article{4a122a332a0c4b17942a705bcd855214,
title = "Systematic Differences between positions and Proper Motions of stars from the PPMXL and UCAC4 Catalogs",
abstract = "Abstract—The PPMXL and UCAC4 catalogs are compared by representing the differences between the positions and proper motions of stars as decompositions into a set of orthogonal vector harmonics withallowancemade for themagnitude equation. A list of 41 316 676 common stars has been compiled using the star identification procedure in the J band (2MASS photometric system). The mean differences betweenthe stellar positions and proper motions have been referred to the centers of 1200 ealPix pixels on the sphere. These data have been generated in the equatorial coordinate system for the stars belonging to 12 J magnitude bins with a width of 0.5m for mean values from 10m. 25 to 15m. 75. For each sample of stars, the differences have been approximated by vector spherical harmonics. A new statistical criterion that is oriented to using HealPix data pixelization and that allows the significance of all the ccessible harmonics to be determined is proposed to extract the signal from noise. An analytical method that includ",
keywords = "Keywords: astrometry, systematic differences, star catalogs, spherical harmonics.",
author = "Vityazev, {V. V.} and Tsvetkov, {A. S.}",
year = "2015",
doi = "10.1134/S1063773715070063",
language = "English",
volume = "41",
pages = "317--333",
journal = "Astronomy Letters",
issn = "1063-7737",
publisher = "МАИК {"}Наука/Интерпериодика{"}",
number = "7",

}

RIS

TY - JOUR

T1 - Systematic Differences between positions and Proper Motions of stars from the PPMXL and UCAC4 Catalogs

AU - Vityazev, V. V.

AU - Tsvetkov, A. S.

PY - 2015

Y1 - 2015

N2 - Abstract—The PPMXL and UCAC4 catalogs are compared by representing the differences between the positions and proper motions of stars as decompositions into a set of orthogonal vector harmonics withallowancemade for themagnitude equation. A list of 41 316 676 common stars has been compiled using the star identification procedure in the J band (2MASS photometric system). The mean differences betweenthe stellar positions and proper motions have been referred to the centers of 1200 ealPix pixels on the sphere. These data have been generated in the equatorial coordinate system for the stars belonging to 12 J magnitude bins with a width of 0.5m for mean values from 10m. 25 to 15m. 75. For each sample of stars, the differences have been approximated by vector spherical harmonics. A new statistical criterion that is oriented to using HealPix data pixelization and that allows the significance of all the ccessible harmonics to be determined is proposed to extract the signal from noise. An analytical method that includ

AB - Abstract—The PPMXL and UCAC4 catalogs are compared by representing the differences between the positions and proper motions of stars as decompositions into a set of orthogonal vector harmonics withallowancemade for themagnitude equation. A list of 41 316 676 common stars has been compiled using the star identification procedure in the J band (2MASS photometric system). The mean differences betweenthe stellar positions and proper motions have been referred to the centers of 1200 ealPix pixels on the sphere. These data have been generated in the equatorial coordinate system for the stars belonging to 12 J magnitude bins with a width of 0.5m for mean values from 10m. 25 to 15m. 75. For each sample of stars, the differences have been approximated by vector spherical harmonics. A new statistical criterion that is oriented to using HealPix data pixelization and that allows the significance of all the ccessible harmonics to be determined is proposed to extract the signal from noise. An analytical method that includ

KW - Keywords: astrometry

KW - systematic differences

KW - star catalogs

KW - spherical harmonics.

U2 - 10.1134/S1063773715070063

DO - 10.1134/S1063773715070063

M3 - Article

VL - 41

SP - 317

EP - 333

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

IS - 7

ER -

ID: 4001207