Combining and Comparing Astrometric Data from Different Epochs: A Case Study with Hipparcos and Nano-JASMINE
(2012) 21st Annual Conference on Astronomical Data Analysis Software and Systems 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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3577436
- author
- Michalik, Daniel
LU
; Lindegren, Lennart
LU
; Hobbs, David LU
; Lammers, Uwe and Yamada, Yoshiyuki
- organization
- publishing date
- 2012
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Astronomical Data Analysis Software and Systems XXI (ASP Conference Series)
- volume
- 461
- pages
- 549 - 552
- publisher
- Astronomical Society of the Pacific (ASP)
- conference name
- 21st Annual Conference on Astronomical Data Analysis Software and Systems
- conference location
- Paris, France
- conference dates
- 2011-11-06 - 2011-11-10
- 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
- 2016-04-04 12:05:34
- date last changed
- 2020-06-16 15:05:02
@inproceedings{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}}, booktitle = {{Astronomical Data Analysis Software and Systems XXI (ASP Conference Series)}}, language = {{eng}}, pages = {{549--552}}, publisher = {{Astronomical Society of the Pacific (ASP)}}, title = {{Combining and Comparing Astrometric Data from Different Epochs: A Case Study with Hipparcos and Nano-JASMINE}}, url = {{http://www.aspbooks.org/a/volumes/article_details/?paper_id=34730}}, volume = {{461}}, year = {{2012}}, }