Investigation on the southern part of the high density astrometric catalogs USNO B1.0, 2MASS and UCAC2

Details Investigation on the southern part of the high density astrometric catalogs USNO B1.0, 2MASS and UCAC2 Investigation on the southern part of the high density astrometric catalogs USNO B1.0, 2MASS and UCAC2

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...429..739d&link_type=abstract

Astronomy and Astrophysics, v.429, p.739-745 (2005)

Astronomy and Astrophysics

Astrophysics

6

Reference Systems, Astrometry

Scientific paper

To access the astrometric capability of dense catalogues at southern declinations, the results from a sample of 76 ICRF sources of the observational program conducted at the 1.60m telescope of the Laboratório Nacional de Astrofísica - LNA, Brazil, are examined. The observations were taken on mean epoch 1999.76, at Johnston V filter, in fields of size 5 arcmin, with scale of 0.3 arcsec/pixel. The astrometric reduction is made relatively to the catalogs USNO B1.0 and 2MASS. The comparison between the ICRF position and the catalogue referred measured optical counterpart position reveals both catalogs aligned to the ICRF, but for an equatorial offset of the B1.0 at 90.4 mas, to a significance level of 3.4 times the standard error. The direct comparison between catalogue and ICRF positions gives alike results. For the B1.0 there are also clumped variations on average ranging 96 mas, but reaching up to the level of 300 mas. Local corrections on the B1.0 positions were applied using the UCAC2 catalog. These were effective to remove the equatorial offset and the zonal variations, manifesting the internal consistency of the B1.0 positions. This supports the astrometric adherence of the UCAC2 catalog to the ICRS, as also shown by the 2MASS and referred results, since the systematic difference between 2MASS and UCAC2 is lowest.
Based on observations made at Laboratório Nacional de Astrofísica/MCT, Brazil.

Affiliated with

Also associated with

No associations

Rating

Investigation on the southern part of the high density astrometric catalogs USNO B1.0, 2MASS and UCAC2 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 Investigation on the southern part of the high density astrometric catalogs USNO B1.0, 2MASS and UCAC2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investigation on the southern part of the high density astrometric catalogs USNO B1.0, 2MASS and UCAC2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-893899