A Study of the Accuracy of Narrow Field Astrometry using Star Trails taken with the CFHT

Details A Study of the Accuracy of Narrow Field Astrometry using Star Trails taken with the CFHT A Study of the Accuracy of Narrow Field Astrometry using Star Trails taken with the CFHT

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasp..107..399h&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.107, p.399

Astronomy and Astrophysics

Astronomy

3

Atmospheric Effects, Site Testing

Scientific paper

We extend the study of Han (1989a) to angles as small as 7 arcsec. To investigate the relation between the relative motion and the separation of two stars in astrometric observations, we analyzed star trail plates taken with the CFHT by Christian and Racine (1985). The result shows that on Mauna Kea the r.m.s. relative image motion for 1 sec of integration time is given by sigma = 0.054 arcsec (theta/10 arcminute)^0.35, where theta is the separation between two stars. The standard theory on atmospheric turbulence predicts that sigma is proportional to the 1/3th power of theta. Our study shows that it is valid for the range of 7 arcsec < theta < 1100 arcsec. Han, using data taken with MAP (Multichannel Astrometric Photometer, Gatewood 1987) of Allegheny Observatory of the University of Pittsburgh, showed that in Pittsburgh sigma = 0.143 arcsec (theta/10arcminute)^0.34. This implies that the accuracy of very narrow field astrometric observations at an excellent site may be more than 7 times higher than those of the currently most precise astrometric programs. (SECTION: Computing and Data Analysis)

Affiliated with

Also associated with

No associations

Rating

A Study of the Accuracy of Narrow Field Astrometry using Star Trails taken with the CFHT 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 A Study of the Accuracy of Narrow Field Astrometry using Star Trails taken with the CFHT, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Study of the Accuracy of Narrow Field Astrometry using Star Trails taken with the CFHT will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1693935