Measurement of the second-order g(2) correlation function of visible light from Vega in photon counting mode

Author(s):  
Michele Fiori ◽  
Cesare Barbieri ◽  
Luca Zampieri ◽  
Giampiero Naletto ◽  
Alexandr Burtovoi
1982 ◽  
Vol 67 ◽  
pp. 271-278
Author(s):  
C.F.W. Harmer ◽  
Dianne L. Harmer

Two detector systems, recently developed at the Royal Greenwich Observatory, have undergone tests on the coude spectrograph of the 30-inch telescope at Herstmonceux. The first is an intensified Reticon system, used in a photon counting mode; the second is a directly illuminated, cooled CID.


2004 ◽  
pp. 611-614 ◽  
Author(s):  
Jean-Luc Gach ◽  
Christian Guillaume ◽  
Olivier Boissin ◽  
Cyril Cavadore

1988 ◽  
Vol 123 ◽  
pp. 521-524
Author(s):  
P. Nisenson ◽  
A. K. Dupree ◽  
R. W. Noyes

The Precision CAlcium Photometer (PCAP) has been built with characteristics optimized for amplitude astroseismology. The instrument consists of two units: an on-telescope optical system that forms and stabilizes a stellar image onto a 200 micron optical fiber; and a spectrometer unit that accepts the light from the fiber and integrates the Calcium II H and K lines (3968.5 Å and 3933.7 Å), along with adjacent continuum regions, in a photon-counting mode. Some key system characteristics include active image stabilization, a 12-meter optical fiber with ~70% transmission at 3950 Å, and a thermally and mechanically stable spectrometer. A description of the instrument and of laboratory and on-telescope test runs are discussed below.


1981 ◽  
Vol 35 (2) ◽  
pp. 935-938
Author(s):  
A. I. Shchurenko ◽  
B. V. Stetsenko ◽  
V. S. Lysenko ◽  
I. P. Fesenko

2021 ◽  
Vol 129 (8) ◽  
pp. 1048
Author(s):  
В.Е. Привалов ◽  
В.Г. Шеманин

The Raman back scattering lidar equation for the methanol molecules numerical solution results at the methanol molecules remote sensing in the atmosphere with concentrations in the range 1012 cm-3... 1018 cm-3 at the range distances up to 1000 meters in the synchronous photon counting mode are presented. It is shown that during the measurement time of 1 s with such a Raman lidar at the 405 nm laser wavelength, it is possible to probe the methanol molecules with a concentration level of about 1016 cm-3 at distances up to 600 m.


2021 ◽  
Vol 9 (3) ◽  
pp. 216-223
Author(s):  
Ivan Gulakov ◽  
Andrey Zenevich ◽  
Evgeniy Novikov ◽  
Olga Kochergina ◽  
Anastasiy Lagutik

At present, matrix multi-element avalanche photodetectors operating in the photon counting mode are widely used for detecting optical radiation. However, the char-acteristics of matrix multi-element avalanche photodetectors operating in this mode are currently insufficiently studied. Prototypes of Si-photomultiplier tubes (Si-PMTs) with a p+–p–n+ structure produced by JSC Integral (Republic of Belarus), as well as serially produced silicon photomultipliers Ketek PM 3325 and ON Semi FC 30035 have been used as objects of research. This article presents the research results of characteristics in the photon counting mode of the specified photodetec-tors. The dependences of the specific amplitude sensitivity ratio on the wavelength of optical radiation, the temperature, the supply voltage of the matrix multi-element avalanche photodetector are determined.


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