Combining and comparing astrometric data from different epochs: A case study with Hipparcos and Nano-JASMINE

Details Combining and comparing astrometric data from different epochs: A case study with Hipparcos and Nano-JASMINE Combining and comparing astrometric data from different epochs: A case study with Hipparcos and Nano-JASMINE

2012-01-13

arxiv.org/abs/1201.2849v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

4 pages, 1 figure, 1 table; proceedings of ADASS XXI (Paris, 2011), ASP Conference Series

Scientific paper

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 Gaia will deliver some tens of micro-arcsecond accurate astrometric parameters. Until the final Gaia 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.

Affiliated with

Also associated with

No associations

Rating

Combining and comparing astrometric data from different epochs: A case study with Hipparcos and Nano-JASMINE does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Combining and comparing astrometric data from different epochs: A case study with Hipparcos and Nano-JASMINE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combining and comparing astrometric data from different epochs: A case study with Hipparcos and Nano-JASMINE will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-471746