Translator Disclaimer
3 February 2004 Positional accuracy as a measure of Chandra's optical distortions
Author Affiliations +
We present a study of Chandra's optical distortions by examining the positional accuracy of observed sources on the HRC-I. We investigate the Chandra mirror and detector models' ability to reproduce the detector locations of observed sources by simulating ~160 calibration observations of AR Lac, HR 1099, and LMC X-1. To study the optical distortions of the mirrors more directly, we compare a 63 ksec observation of the Orion Nebular Cluster (ONC) with positions based on the well-determined optical astrometry of the cluster. We simulate observations of 100 reasonably bright sources from the Hillenbrand 1997 catalog of the ONC and compare the simulated positions with their observed positions. Offsets between the optical positions and the observed X-ray positions help determine a map of the optical distortions of the Chandra mirrors.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eli Beckerman, Tom Aldcroft, Terrance J. Gaetz, Diab H. Jerius, Dan Nguyen, and Michael Tibbetts "Positional accuracy as a measure of Chandra's optical distortions", Proc. SPIE 5165, X-Ray and Gamma-Ray Instrumentation for Astronomy XIII, (3 February 2004);


Arcus: the x-ray grating spectrometer explorer
Proceedings of SPIE (September 29 2016)
NuSTAR on-ground calibration: I. Imaging quality
Proceedings of SPIE (September 16 2012)
X-ray calibration of the SODART flight telescopes
Proceedings of SPIE (July 10 1997)
The VIRUS data reduction pipeline
Proceedings of SPIE (June 29 2006)

Back to Top