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First results from the MIT optical rapid imaging system (MORIS) on the IRTF: A stellar occultation by Pluto and a transit by exoplanet XO-2b

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dc.contributor.author Gulbis, Amanda A. S.
dc.contributor.author Bus, S.J.
dc.contributor.author Elliott, James L.
dc.contributor.author Rayner, J. T.
dc.contributor.author Stahlberger, W. E.
dc.contributor.author Rojas, Folkers E.
dc.contributor.author Adams, Elisabeth Rose
dc.contributor.author Person, Michael J.
dc.contributor.author Chung, R.
dc.contributor.author Tokunaga, A. T.
dc.contributor.author Zuluaga, Carlos Andres
dc.date.accessioned 2012-12-03T15:10:37Z
dc.date.available 2012-12-03T15:10:37Z
dc.date.issued 2011-04
dc.date.submitted 2011-02
dc.identifier.issn 0004-6280
dc.identifier.issn 1538-3873
dc.identifier.uri http://hdl.handle.net/1721.1/75129
dc.description.abstract We present a high-speed, visible-wavelength imaging instrument: MORIS (the MIT Optical Rapid Imaging System). MORIS is mounted on the 3 m Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii. Its primary component is an Andor iXon camera, a nearly 60" square field of view with high quantum efficiency, low read noise, low dark current, and full-frame readout rates ranging from as slow as desired to a maximum of between 3.5 Hz and 35 Hz (depending on the mode; read noise of 6 pixel and 49 pixel with electron-multiplying gain = 1 , respectively). User-selectable binning and subframing can increase the cadence to a few hundred hertz. An electron-multiplying mode can be employed for photon counting, effectively reducing the read noise to subelectron levels at the expense of dynamic range. Data cubes, or individual frames, can be triggered to several-nanosecond accuracy using the Global Positioning System. MORIS is mounted on the side-facing exit window of SpeX, allowing simultaneous near-infrared and visible observations. Here, we describe the components, setup, and measured characteristics of MORIS. We also report results from the first science observations: the 2008 June 24 stellar occultation by Pluto and an extrasolar planetary transit by XO-2b. The Pluto occultation of a 15.8 magnitude star has a signal-to-noise ratio of 35 per atmospheric scale height and a midtime error of 0.32 s. The XO-2b transit reaches photometric precision of 0.5 mmag in 2 minutes and has a midtime timing precision of 23 s. en_US
dc.description.sponsorship United States. National Aeronautics and Space Administration (grant NNX07AK95G) en_US
dc.language.iso en_US
dc.publisher University of Chicago Press, The en_US
dc.relation.isversionof http://dx.doi.org/10.1086/659636 en_US
dc.rights Creative Commons Attribution-Noncommercial-Share Alike 3.0 en_US
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/ en_US
dc.source arXiv en_US
dc.title First results from the MIT optical rapid imaging system (MORIS) on the IRTF: A stellar occultation by Pluto and a transit by exoplanet XO-2b en_US
dc.type Article en_US
dc.identifier.citation Gulbis, A. A. S. et al. “First Results from the MIT Optical Rapid Imaging System (MORIS) on the IRTF: A Stellar Occultation by Pluto and a Transit by Exoplanet XO-2b.” Publications of the Astronomical Society of the Pacific 123.902 (2011): 461–469. en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Mechanical Engineering en_US
dc.contributor.mitauthor Gulbis, Amanda A. S.
dc.contributor.mitauthor Elliott, James L.
dc.contributor.mitauthor Rojas, Folkers E.
dc.contributor.mitauthor Adams, Elisabeth Rose
dc.contributor.mitauthor Person, Michael J.
dc.contributor.mitauthor Zuluaga, Carlos Andres
dc.relation.journal Publications of the Astronomical Society of the Pacific en_US
dc.identifier.mitlicense OPEN_ACCESS_POLICY en_US
dc.eprint.version Author's final manuscript en_US
dc.type.uri http://purl.org/eprint/type/JournalArticle en_US
eprint.status http://purl.org/eprint/status/PeerReviewed en_US
dspace.orderedauthors Gulbis, A. A. S.; Bus, S. J.; Elliot, J. L.; Rayner, J. T.; Stahlberger, W. E.; Rojas, F. E.; Adams, E. R.; Person, M. J.; Chung, R.; Tokunaga, A. T.; Zuluaga, C. A. en


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