CoCo

An experiment in infrared coronagraphy at the IRTF

Douglas W. Toomey, Christ Ftaclas, Robert H. Brown, David E Trilling

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

Imaging planets, brown dwarfs and disks around nearby stars is a challenging endeavor due to the required scene contrast. Success requires imaging down to m = 20-25 within arcseconds of stars that are 4th-6th magnitude. Light scattered and diffracted from a variety of sources increases the background flux in the area of interest by orders of magnitude masking the target objects. As first shown by M. B. Lyot in 1939 masks can be placed in the focal pane and pupil planes of a camera to occult the bright central source making it possible to image the faint extensions around it. CoCo is an experiment in using a coronagraphic camera, for IR observations, on a large telescope in an effort to understand how a coronagraph can help and how to properly design one of the new generation of large telescopes. Recent result with CoCo show a factor of 5-10 reduction in background levels in the area from 2-7 arcseconds from the central object. This paper will describe those result and summarize what has been learned towards building coronagraphic cameras for today's large telescopes.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages782-790
Number of pages9
Volume3354
DOIs
StatePublished - 1998
Externally publishedYes
EventInfrared Astronomical Instrumentation - Kona, HI, United States
Duration: Mar 23 1998Mar 23 1998

Other

OtherInfrared Astronomical Instrumentation
CountryUnited States
CityKona, HI
Period3/23/983/23/98

Fingerprint

Coronagraphy
Telescopes
Telescope
Infrared
Camera
Cameras
cameras
telescopes
Infrared radiation
Stars
Star
Imaging
Experiment
Imaging techniques
stars
Coronagraph
coronagraphs
Experiments
Masking
Planets

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Toomey, D. W., Ftaclas, C., Brown, R. H., & Trilling, D. E. (1998). CoCo: An experiment in infrared coronagraphy at the IRTF. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3354, pp. 782-790) https://doi.org/10.1117/12.317214

CoCo : An experiment in infrared coronagraphy at the IRTF. / Toomey, Douglas W.; Ftaclas, Christ; Brown, Robert H.; Trilling, David E.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3354 1998. p. 782-790.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Toomey, DW, Ftaclas, C, Brown, RH & Trilling, DE 1998, CoCo: An experiment in infrared coronagraphy at the IRTF. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3354, pp. 782-790, Infrared Astronomical Instrumentation, Kona, HI, United States, 3/23/98. https://doi.org/10.1117/12.317214
Toomey DW, Ftaclas C, Brown RH, Trilling DE. CoCo: An experiment in infrared coronagraphy at the IRTF. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3354. 1998. p. 782-790 https://doi.org/10.1117/12.317214
Toomey, Douglas W. ; Ftaclas, Christ ; Brown, Robert H. ; Trilling, David E. / CoCo : An experiment in infrared coronagraphy at the IRTF. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3354 1998. pp. 782-790
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