Investigation of image nonlinearities in a photon counting image tube

Digital spectra of 7 B-type supergiants in the Milky Way and 15 B-type supergiants in the Large Magellanic Cloud (LMC) were obtained in December 1986 using the “2-D Frutti” detector (2-DF) and the Carnegie Image Tube Spectrograph on the 1-m telescope at the Cerro Tololo Inter-American Observatory. The 2-DF is a photon counting, 2-dimensional Shechtman-type detector, now available on both the 1-m and 4-m telescopes at CTIO. The detector/spectrograph configuration used for the December observing run yielded spectra covering the classical blue region, 3800-5000 Å, with a resolution of approximately 3 Å. The typical observing procedure was to obtain spectra for each star at several locations along the slit. The individual spectra were then averaged (to reduce the detector fixed pattern noise) resulting in S/N ratios of 50-60 in the 4300 Å region.

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An Image Tube with a Curved MicroChannel Plate and its Use in a Photon Counting Imaging System

Advances in Electronics and Electron Physics - Proceedings of The Seventh Symposium held at The Blackett Laboratory, Imperial College ◽

10.1016/s0065-2539(08)60735-0 ◽

1980 ◽

pp. 369-378 ◽

Cited By ~ 3

Author(s):

J.C. Rosier ◽

R. Polaert ◽

T. N'Guyen-Trong ◽

B. Sidoruk

Keyword(s):

Imaging System ◽

Photon Counting ◽

Microchannel Plate ◽

Image Tube

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TV Spectrum Scanner of the 6-Meter Telescope

International Astronomical Union Colloquium ◽

10.1017/s0252921100083652 ◽

1982 ◽

Vol 67 ◽

pp. 283-290

Author(s):

T.A. Somova ◽

N.N. Somov ◽

S.V. Markelov ◽

V.B. Nebelitskii ◽

O.I. Spiridonova ◽

...

Keyword(s):

Detection System ◽

Photon Counting ◽

High Sensitivity ◽

Image Detection ◽

Image Tube ◽

On Line ◽

Counting Mode ◽

Definition Of ◽

Photon Counting Mode

AbstractThe television multichannel spectrophotometer of the BTA (SAO, USSR AS), used for accumulating and recording the spectra of faint astronomical objects, is described. The Soviet image detection system comprises a three-stage image tube (UM-92) optically coupled to a high sensitivity SIT TV tube. The system operates in a photon counting mode with digital definition of the centres of photoelectron events. The spectrophotometer operates on-line with a minicomputer which exercises control of the system and performs primary reductions of the data collected. Illustrations of scans obtained during observations are given.

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