The Second Realization of the International Celestial Reference Frame by Very Long Baseline Interferometry
| dc.contributor.author | Ojha, Roopesh | |
| dc.contributor.author | et al. | |
| dc.contributor.author | ||
| dc.date.accessioned | 2020-03-10T17:41:27Z | |
| dc.date.available | 2020-03-10T17:41:27Z | |
| dc.date.issued | 2015-07-24 | |
| dc.description.abstract | We present the second realization of the International Celestial Reference Frame (ICRF2) at radio wavelengths using nearly 30 years of Very Long Baseline Interferometry observations. ICRF2 contains precise positions of 3414 compact radio astronomical objects and has a positional noise floor of ~40 μas and a directional stability of the frame axes of ~10 μas. A set of 295 new "defining" sources was selected on the basis of positional stability and the lack of extensive intrinsic source structure. The positional stability of these 295 defining sources and their more uniform sky distribution eliminates the two greatest weaknesses of the first realization of the International Celestial Reference Frame (ICRF1). Alignment of ICRF2 with the International Celestial Reference System was made using 138 positionally stable sources common to both ICRF2 and ICRF1. The resulting ICRF2 was adopted by the International Astronomical Union as the new fundamental celestial reference frame, replacing ICRF1 as of 2010 January 1. | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.1088/0004-6256/150/2/58 | en_US |
| dc.description.uri | http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/AJ/150/58 | |
| dc.description.uri | https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Search&refcode=2015AJ....150...58F | |
| dc.description.uri | http://simbad.u-strasbg.fr/simbad/sim-ref?querymethod=bib&simbo=on&submit=submit+bibcode&bibcode=2015AJ....150...58F | |
| dc.format.extent | 16 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2fajr-3qls | |
| dc.identifier.citation | Ojha, Roopesh; The Second Realization of the International Celestial Reference Frame by Very Long Baseline Interferometry; The Astronomical Journal, Volume 150, Number 2 (2015); https://iopscience.iop.org/article/10.1088/0004-6256/150/2/58 | en_US |
| dc.identifier.uri | http://hdl.handle.net/11603/17528 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | The American Astronomical Society | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II) | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | The Second Realization of the International Celestial Reference Frame by Very Long Baseline Interferometry | en_US |
| dc.type | Text | en_US |