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Welcome to the NIRC2 Distortion wiki!

This is intended to be a repository for NIRC2 distortion solutions. Please submit and issue or email jessica.lu [at] hawaii.edu with questions.

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NIRC2 Narrow Camera Distortion Solution - post 2015 April 13

See Service et al., submitted for details on solution construction.

• Distortion in X
• Distortion in Y
• Distortion Uncertainty in X
• Distortion Uncertainty in Y

NIRC2 Narrow Camera Distortion Solution - pre 2015 April 13

See Yelda et al. 2010 for details on solution construction.

• Distortion in X
• Distortion in Y
• Distortion Uncertainty in X
• Distortion Uncertainty in Y

Note, all files above are zipped FITS files with 1024 x 1024 arrays containing a map of the distortion. Within the distortion maps, each pixel specifies the required shift (in pixels) to undistort a NIRC2 image. Uncertainty maps include both statistical measurement error and residual systematic error, which has a magnitude of 0.1 pix.

Correcting Distortion

Python code to undistort individual frames using the IRAF package drizzle: nirc2dewarp.py (Last updated: 2010 Nov. 20) We thank Shelley Wright for her help with this code.

Also see notes at: AstroBetter