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• W3099793742 endingPage "A159" @default.
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• W3099793742 abstract "A new realization of the International Celestial Reference Frame (ICRF) is presented based on the work achieved by a working group of the International Astronomical Union (IAU) mandated for this purpose. This new realization follows the initial realization of the ICRF completed in 1997 and its successor, ICRF2, adopted as a replacement in 2009. The new frame, referred to as ICRF3, is based on nearly 40 years of data acquired by very long baseline interferometry at the standard geodetic and astrometric radio frequencies (8.4 and 2.3 GHz), supplemented with data collected at higher radio frequencies (24 GHz and dual-frequency 32 and 8.4 GHz) over the past 15 years. State-of-the-art astronomical and geophysical modeling has been used to analyze these data and derive source positions. The modeling integrates, for the first time, the effect of the galactocentric acceleration of the solar system (directly estimated from the data) which, if not considered, induces significant deformation of the frame due to the data span. The new frame includes positions at 8.4 GHz for 4536 extragalactic sources. Of these, 303 sources, uniformly distributed on the sky, are identified as “defining sources” and as such serve to define the axes of the frame. Positions at 8.4 GHz are supplemented with positions at 24 GHz for 824 sources and at 32 GHz for 678 sources. In all, ICRF3 comprises 4588 sources, with three-frequency positions available for 600 of these. Source positions have been determined independently at each of the frequencies in order to preserve the underlying astrophysical content behind such positions. They are reported for epoch 2015.0 and must be propagated for observations at other epochs for the most accurate needs, accounting for the acceleration toward the Galactic center, which results in a dipolar proper motion field of amplitude 0.0058 milliarcsecond yr −1 (mas yr −1 ). The frame is aligned onto the International Celestial Reference System to within the accuracy of ICRF2 and shows a median positional uncertainty of about 0.1 mas in right ascension and 0.2 mas in declination, with a noise floor of 0.03 mas in the individual source coordinates. A subset of 500 sources is found to have extremely accurate positions, in the range of 0.03–0.06 mas, at the traditional 8.4 GHz frequency. Comparing ICRF3 with the recently released Gaia Celestial Reference Frame 2 in the optical domain, there is no evidence for deformations larger than 0.03 mas between the two frames, in agreement with the ICRF3 noise level. Significant positional offsets between the three ICRF3 frequencies are detected for about 5% of the sources. Moreover, a notable fraction (22%) of the sources shows optical and radio positions that are significantly offset. There are indications that these positional offsets may be the manifestation of extended source structures. This third realization of the ICRF was adopted by the IAU at its 30th General Assembly in August 2018 and replaced the previous realization, ICRF2, on January 1, 2019." @default.
• W3099793742 created "2020-11-23" @default.
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• W3099793742 date "2020-12-01" @default.
• W3099793742 modified "2023-10-11" @default.
• W3099793742 title "The third realization of the International Celestial Reference Frame by very long baseline interferometry" @default.
• W3099793742 cites W1594608216 @default.
• W3099793742 cites W179476659 @default.
• W3099793742 cites W1966105500 @default.
• W3099793742 cites W1969329305 @default.
• W3099793742 cites W1977397063 @default.
• W3099793742 cites W1981186301 @default.
• W3099793742 cites W1996519804 @default.
• W3099793742 cites W1996821639 @default.
• W3099793742 cites W2000316817 @default.
• W3099793742 cites W2001891514 @default.
• W3099793742 cites W2011535923 @default.
• W3099793742 cites W2032009293 @default.
• W3099793742 cites W2034737380 @default.
• W3099793742 cites W2047387806 @default.
• W3099793742 cites W2048845048 @default.
• W3099793742 cites W2050667159 @default.
• W3099793742 cites W2057634812 @default.
• W3099793742 cites W2059778375 @default.
• W3099793742 cites W2068265070 @default.
• W3099793742 cites W2069622086 @default.
• W3099793742 cites W2075196714 @default.
• W3099793742 cites W2080972501 @default.
• W3099793742 cites W2094314551 @default.
• W3099793742 cites W2095766244 @default.
• W3099793742 cites W2096724331 @default.
• W3099793742 cites W2097236873 @default.
• W3099793742 cites W2113201113 @default.
• W3099793742 cites W2122432913 @default.
• W3099793742 cites W2132770193 @default.
• W3099793742 cites W2138342150 @default.
• W3099793742 cites W2138791392 @default.
• W3099793742 cites W2141559353 @default.
• W3099793742 cites W2152336181 @default.
• W3099793742 cites W2157947912 @default.
• W3099793742 cites W2163343387 @default.
• W3099793742 cites W2166380612 @default.
• W3099793742 cites W2173246082 @default.
• W3099793742 cites W2177073435 @default.
• W3099793742 cites W2182422153 @default.
• W3099793742 cites W2401382839 @default.
• W3099793742 cites W2443910608 @default.
• W3099793742 cites W2492450223 @default.
• W3099793742 cites W2526180730 @default.
• W3099793742 cites W2527655127 @default.
• W3099793742 cites W2549462224 @default.
• W3099793742 cites W2554074990 @default.
• W3099793742 cites W2563371456 @default.
• W3099793742 cites W2603784875 @default.
• W3099793742 cites W2610026512 @default.
• W3099793742 cites W2772630226 @default.
• W3099793742 cites W2789038287 @default.
• W3099793742 cites W2884557233 @default.
• W3099793742 cites W2885434589 @default.
• W3099793742 cites W2885579457 @default.
• W3099793742 cites W2944231442 @default.
• W3099793742 cites W2953420207 @default.
• W3099793742 cites W3098530504 @default.
• W3099793742 cites W3098581219 @default.
• W3099793742 cites W3098746933 @default.
• W3099793742 cites W3099931114 @default.
• W3099793742 cites W3100925729 @default.
• W3099793742 cites W3102087921 @default.
• W3099793742 cites W3103440994 @default.
• W3099793742 cites W3103502819 @default.
• W3099793742 cites W3103791196 @default.
• W3099793742 cites W3104209654 @default.
• W3099793742 cites W3105047641 @default.
• W3099793742 cites W3122906103 @default.
• W3099793742 cites W4289710306 @default.
• W3099793742 cites W4289729094 @default.
• W3099793742 cites W4289926186 @default.
• W3099793742 doi "https://doi.org/10.1051/0004-6361/202038368" @default.
• W3099793742 hasPublicationYear "2020" @default.

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