A New-Speckle Interferometry System for the MAMA Detector

We have developed a new system for making speckle observations with the multianode microchannel array (MAMA) detector. This system is a true photon-counting imaging device which records the arrival time of every detected photon and allows for reconstruction of image features near the diffraction lim...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 1992-10, Vol.104 (680), p.939-948
Main Authors: Horch, E., Morgan, J. S., Giaretta, G., Kasle, D. B.
Format: Article
Language:English
Subjects:
Anodes
Astronomical and space-research instrumentation
Astronomical objects
Astronomy
Astronomy & Astrophysics
Autocorrelation
Binary stars
Cameras
Earth, ocean, space
Exact sciences and technology
Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations
Instrumentation And Photography
Physical Sciences
Pixels
Point sources
Position angle
Science & Technology
Telescopes
Wave diffraction
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Description
Summary:We have developed a new system for making speckle observations with the multianode microchannel array (MAMA) detector. This system is a true photon-counting imaging device which records the arrival time of every detected photon and allows for reconstruction of image features near the diffraction limit of the telescope. We present a description of the system and summary of observational results obtained at the Lick Observatory 1-m reflector in 1991 September. The diffraction limit of the 1-m telescope at 5029 Å is about 0.125 arcsec and we have successfully resolved the catalogued interferometric binary HD 202582 with a separation of 0.157 ± 0.031 arcsec. A pair of stars in the open cluster ÷ Persei separated by 2.65 ± 0.22 arcsec with approximate V magnitudes 8.6 and 11.5 has also been successfully analyzed with the speckle technique.
ISSN:0004-6280
1538-3873
DOI:10.1086/133078