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Extension of the ICRF for selected areas down to the 16th magnitude – II
- Source :
- Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2003, 409 (1), pp.361-368. ⟨10.1051/0004-6361:20031063⟩
- Publication Year :
- 2003
- Publisher :
- EDP Sciences, 2003.
-
Abstract
- International audience; In this paper we provide a major upgrade of the work presented in Camargo et al. (2001), aiming at the extension of the ICRF at optical wavelengths in regions of special astronomical interest, using observations from the Bordeaux and Valinhos meridian circles. Along with the new fields, the main differences, when compared to the first release, are: a much larger sky coverage, the replacement of the AC2000 by its upgraded version AC2000.2 as one of the first epoch astrometrical sources, inclusion of Tycho-2 and 2MASS photometry when available, and the correction for a magnitude equation on the Valinhos right ascension system as well. The resulting catalogue contains 678 828 entries with positional external precisions, on both coordinates, ranging from 50-60 mas (V ≤ 13.5) to 70-140 mas (13.5 < V ≤ 16.0). For the proper motions, precisions range from 3 mas/year to about 15 mas/year, depending on magnitude and declination.
- Subjects :
- Physics
010504 meteorology & atmospheric sciences
media_common.quotation_subject
Astronomy and Astrophysics
Astrophysics
01 natural sciences
Declination
Photometry (optics)
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[SDU]Sciences of the Universe [physics]
Space and Planetary Science
Sky
0103 physical sciences
Right ascension
010303 astronomy & astrophysics
0105 earth and related environmental sciences
media_common
Subjects
Details
- ISSN :
- 14320746 and 00046361
- Volume :
- 409
- Database :
- OpenAIRE
- Journal :
- Astronomy & Astrophysics
- Accession number :
- edsair.doi.dedup.....3de13e1c7e2b86b58a33fe4245d77cf8