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Combining and Comparing Astrometric Data from Different Epochs: A Case Study with Hipparcos and Nano-JASMINE

Michalik, Daniel LU ; Lindegren, Lennart LU ; Hobbs, David LU ; Lammers, Uwe and Yamada, Yoshiyuki (2012) 21st Annual Conference on Astronomical Data Analysis Software and Systems In Astronomical Data Analysis Software and Systems XXI (ASP Conference Series) 461. p.549-552
Abstract
The Hipparcos mission (1989-1993) resulted in the first space-based stellar catalogue including measurements of positions, parallaxes and annual proper motions accurate to about one milli-arcsecond. More space astrometry missions will follow in the near future. The ultra-small Japanese mission Nano-JASMINE (launch in late 2013) will determine positions and annual proper motions with some milli-arcsecond accuracy. In mid 2013 the next-generation ESA mission Gala will deliver some tens of micro-arcsecond accurate astrometric parameters. Until the final Gala catalogue is published in early 2020 the best way of improving proper motion values is the combination of positions from different missions separated by long time intervals. Rather than... (More)
The Hipparcos mission (1989-1993) resulted in the first space-based stellar catalogue including measurements of positions, parallaxes and annual proper motions accurate to about one milli-arcsecond. More space astrometry missions will follow in the near future. The ultra-small Japanese mission Nano-JASMINE (launch in late 2013) will determine positions and annual proper motions with some milli-arcsecond accuracy. In mid 2013 the next-generation ESA mission Gala will deliver some tens of micro-arcsecond accurate astrometric parameters. Until the final Gala catalogue is published in early 2020 the best way of improving proper motion values is the combination of positions from different missions separated by long time intervals. Rather than comparing positions from separately reduced catalogues, we propose an optimal method to combine the information from the different data sets by making a joint astrometric solution. This allows to obtain good results even when each data set alone is insufficient for an accurate reduction. We demonstrate our method by combining Hipparcos and simulated Nano-JASMINE data in a joint solution. We show a significant improvement over the conventional catalogue combination. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Astronomical Data Analysis Software and Systems XXI (ASP Conference Series)
volume
461
pages
549 - 552
publisher
Astronomical Society of the Pacific
conference name
21st Annual Conference on Astronomical Data Analysis Software and Systems
external identifiers
  • WOS:000314795700118
language
English
LU publication?
yes
id
ce284a1b-05bf-49a8-9cc6-d2002f1f83a9 (old id 3577436)
alternative location
http://www.aspbooks.org/a/volumes/article_details/?paper_id=34730
date added to LUP
2013-03-20 15:02:59
date last changed
2016-04-16 10:06:44
@misc{ce284a1b-05bf-49a8-9cc6-d2002f1f83a9,
  abstract     = {The Hipparcos mission (1989-1993) resulted in the first space-based stellar catalogue including measurements of positions, parallaxes and annual proper motions accurate to about one milli-arcsecond. More space astrometry missions will follow in the near future. The ultra-small Japanese mission Nano-JASMINE (launch in late 2013) will determine positions and annual proper motions with some milli-arcsecond accuracy. In mid 2013 the next-generation ESA mission Gala will deliver some tens of micro-arcsecond accurate astrometric parameters. Until the final Gala catalogue is published in early 2020 the best way of improving proper motion values is the combination of positions from different missions separated by long time intervals. Rather than comparing positions from separately reduced catalogues, we propose an optimal method to combine the information from the different data sets by making a joint astrometric solution. This allows to obtain good results even when each data set alone is insufficient for an accurate reduction. We demonstrate our method by combining Hipparcos and simulated Nano-JASMINE data in a joint solution. We show a significant improvement over the conventional catalogue combination.},
  author       = {Michalik, Daniel and Lindegren, Lennart and Hobbs, David and Lammers, Uwe and Yamada, Yoshiyuki},
  language     = {eng},
  pages        = {549--552},
  publisher    = {ARRAY(0x8d7fcf0)},
  series       = {Astronomical Data Analysis Software and Systems XXI (ASP Conference Series)},
  title        = {Combining and Comparing Astrometric Data from Different Epochs: A Case Study with Hipparcos and Nano-JASMINE},
  volume       = {461},
  year         = {2012},
}