A Data-Cube Extraction Pipeline for a Coronagraphic Integral Field Spectrograph
Abstract
Project 1640 is a high-contrast near-infrared instrument probing the vicinities of nearby stars through the unique combination of an integral field spectrograph with a Lyot coronagraph and a high-order adaptive optics system. The extraordinary data-reduction demands, similar to those that several new exoplanet imaging instruments will face in the near future, have been met by the novel software algorithms described herein. The Project 1640 Data Cube Extraction Pipeline (PCXP) automates the translation of 3.8 × 10^4 closely packed, coarsely sampled spectra to a data cube. We implement a robust empirical model of the spectrograph focal-plane geometry to register the detector image at subpixel precision, and we map the cube extraction. We demonstrate our ability to accurately retrieve source spectra based on an observation of Saturn's moon Titan.
Additional Information
© 2011 The Astronomical Society of the Pacific. Received 2010 July 2; accepted 2011 April 26; published 2011 May 24. Our referee, Michael McElwain, provided many thoughtful comments on our techniques, which led us to improve both the algorithms themselves and our descriptions. Thanks are also due to Anand Sivaramakrishnan, Emily Rice, James Gunn, David Zurek, and Charles Beichman for helpful discussions. We also thank Emily Schaller for providing us with unpublished SpeX and Infrared Telescope Facility Titan data to serve as a reference spectrum. Project 1640 is funded by National Science Foundation grants AST-0520822, AST-0804417, and AST-0908484. Part of this work was performed under a contract with the California Institute of Technology funded by NASA through the Sagan Fellowship Program. The members of the Project 1640 team are also grateful for support from the Cordelia Corporation, Hilary and Ethel Lipsitz, the Vincent Astor Fund, Judy Vale, Andrew Goodwin, and an anonymous donor.Attached Files
Published - Zimmerman2011p15146Publ_Astron_Soc_Pac.pdf
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Additional details
- Eprint ID
- 24537
- Resolver ID
- CaltechAUTHORS:20110726-083217413
- AST-0520822
- NSF
- AST-0804417
- NSF
- AST-0908484
- NSF
- NASA Sagan Fellowship
- Created
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2011-07-26Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field