Publication Date:
2005-11-30
Description:
The objective grating technique is discussed. From the investigation of actual material, it is established that the effect of coma varies significantly from plate to plate, also that a model linear in diameter and/or coordinate may be inadequate for its removal, and even introduce systematic errors. From this standpoint, the requirements of reference star systems are discussed.
Keywords:
SPACE SCIENCES
Type:
Conf. on Phot. Astrometric Technique; p 241-248
Format:
text