Skip to main content
Log in

Accurate determination of the plate model based on CCD images with different orientations

  • Articles
  • Astrometry
  • Published:
Chinese Science Bulletin

Abstract

The images of the open cluster NGC2168 are taken using the newly-fitted 2k×2k CCD attached to the 1-m telescope at the Yunnan Observatory with two different orientations. After the catalogue position of a star from UCAC2 is compared with its corresponding measured position, a surprising result shows that a small field of view (about 7’×7’) exhibits an obvious distortion. Specifically, the polynomial between the standard coordinate (ξ,η) and its corresponding measured one (x,y) for a star in each field of view has significant terms as high as 4th order. Accordingly, the positional measurement accuracy of a bright UCAC2 star can be derived as well as ˜7 mas in each direction (60 s of exposure time and near the zenith). This new finding would be important for a CCD image to deliver a highly accurate position in its whole field of view.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Subscribe and save

Springer+ Basic
EUR 32.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or Ebook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Anderson J, King I R. Toward high-precision astrometry with WFPC2. I. Deriving an accurate point-spread function. Publ Astron Soc Pac, 2000, 112: 1360–1382

    Article  Google Scholar 

  2. Anderson J, King I R. An improved distortion solution for the Hubble Space Telescope’s WFPC2. Publ Astron Soc Pac, 2003, 115: 113–131

    Article  Google Scholar 

  3. Poulet F, Sicardy B. Astrometric observations of inner Saturnian satellites. Astron Astrophys, 2001, 366: 339–342

    Article  Google Scholar 

  4. French R G, McGhee C A, Frey M, et al. Astrometry of Saturn’s satellites from the Hubble Space Telescope WFPC2. Publ Astron Soc Pac, 2006, 118: 246–259

    Article  Google Scholar 

  5. Harper D, Murray C D, Beurle K, et al. CCD astrometry of Saturn’s satellites 1990-1994. Astron Astrophys Suppl Ser, 1997, 121: 65–69

    Article  Google Scholar 

  6. Qiao R C, Shen K X, Liu J R, et al. 1994-1996 CCD astrometric observations of Saturn’s satellites and comparison with theories. Astron Astrophys Suppl Ser, 1999, 137: 1–5

    Article  Google Scholar 

  7. Vienne A, Thuillot W, Veiga C H, et al. Saturnian satellite observations made in Brazil during the 1995 opposition with an astrometric analysis. Astron Astrophys, 2001, 380: 727–733

    Article  Google Scholar 

  8. Peng Q Y, Vienne A, Shen K X. Positional measuring procedure and CCD observations for Saturnian satellites. Astron Astrophys, 2002, 383: 296–301

    Article  Google Scholar 

  9. Peng Q Y. New confirmation of image-processing techniques for astrometry of Saturn and its satellites. Mon Not R Astron Soc, 2005, 359: 1597–1600

    Article  Google Scholar 

  10. Peng Q Y, Vienne A, Gan L L, et al. CCD positions of Saturn and its major satellites from 2002-2006. Astron J, 2008, 136: 2214–2221

    Article  Google Scholar 

  11. Bertin E, Arnouts S. SExtractor: Software for source extraction. Astron Astrophys Suppl Ser, 1996, 117: 393–404

    Article  Google Scholar 

  12. Li Z, Peng Q Y, Han G Q. Comparison of digital centering algorithms based on CCD Images (in Chinese). Acta Astron Sin, 2009, 50: 340–348

    Google Scholar 

  13. Zacharias N, Urban S E, Zacharias M I, et al. The second US naval observatory CCD astrograph catalog (UCAC2). Astron J, 2004, 127: 3043–3059

    Article  Google Scholar 

  14. Tabur V. Fast algorithm for matching CCD images to a stellar catalogue. Publ Astron Soc Aust, 2007, 24: 189–198

    Article  Google Scholar 

  15. Anderson J, Bedin L R, Piotto G, et al. Ground-based CCD astrometry with wide field imagers. I. Observations just a few years apart allow decontamination of field objects from members in two globular clusters. Astron Astrophys, 2006, 454: 1029–1045

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to QingYu Peng.

Additional information

This work was supported by the National Natural Science Foundation of China and the Astronomical Joint Fund under the Chinese Academy of Sciences (Grant Nos. 10573008, 10778617, 10973007).

About this article

Cite this article

Peng, Q., Fan, L. Accurate determination of the plate model based on CCD images with different orientations. Chin. Sci. Bull. 55, 791–796 (2010). https://doi.org/10.1007/s11434-010-0053-2

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11434-010-0053-2

Keywords

Navigation