Korea Microlensing Telescope Network    

Astrometric Calibration for KMTNet data

2015-09-03 / PM 01:09:22

Due to the wide-field of view of the KMTNet, the Mosaic CCD image shows a field distortion of about 4%. As expected from the optical design, the distortion effect greatly increases at four rectangular corners of Mosaic CCDs. Although some WCS (World Coordinate System) informations were added at the image header to support the astrometric analysis, researchers can derive more accurate astrometric data by using the attached document.

Distortion Map of the KMTNet Mosaic CCD Image

[Attached] Determination of accurate WCS (Written by Dr. Yujin Yang at KASI)