NIRC2 Astrometry Page

NIRC2
Astrometry Page

This page contains information, utilities, and procedures related to NIRC2 Astrometry.

This section provides recent results from the GC group:

Sylvana Yelda has done a great job documenting NIRC2 distortion and the results are presented in this paper: S. Yelda et al. 2010, ApJ, 725, 331

You can download the distortion solution from this webpage courtesy of Sylvana Yelda.
The astrobetter.com wiki has a page on how to use this new distortion solution courtesy of Jessica Lu.

Many thanks to the UCLA Galactic Center Group for making this information available.

This section provides IDL source code (graciously provided by Keck Observer Brian Cameron) for removing geometric distortion from NIRC2 images. The use and methodology of the code is well described in the comment headers.

Source Code
- nirc2dewarp.pro
- nirc2dewarp_positions.pro

This section contains a link to a related report (also provided by Brian).

Report

This section contains recommended astrometric calibration fields.

M92	17^h 15.6^m +43° 12	Procedure TBD	Data Sets TBD
M15	21^h 27.6^m +11° 57	Procedure	m15_090814.tar.gz (graciously donated by Hai Fu)

This section contains information related to the NIRC2 position angle.

Publications that report NIRC2 PA accuracy measurements.
- Pravdo et al (2006, ApJ, 649, 389)
- Konopacky et al (2007, AJ, 133, 2008)
- Liu, Dupuy & Ireland (2008, ApJ, submitted)
  - Text from Liu et al related to PA

Last modified: Sat Feb 23 2008 21:56:41 HST