Iqueye, a single photon-counting photometer applied to the ESO new technology telescope

Naletto, G.; Barbieri, C.; Occhipinti, Tommaso; Capraro, Ivan; Paola, Andrea; Facchinetti, Claudia; Verroi, Enrico; Zoccarato, Paolo; Anzolin, G.; Belluso, M.; Billotta, S.; Bolli, Pietro; Bonanno, G.; Deppo, Vania Da; Fornasier, S.; Germanà, C.; Giro, E.; Marchi, S.; Messina, Filippo; Pernechele, Claudio; Tamburini, Fabrizio; Zaccariotto, Mirco; Zampieri, L.

doi:10.1051/0004-6361/200912862

Cited by 55 publications

(61 citation statements)

References 19 publications

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“…The instrument was deployed at the Coudé focus of the 200 inch Hale Telescope at Palomar Observatory. Even though other high-resolution optical instruments such as OPTIMA (Straubmeier et al 2001), BVIT (Welsh et al 2012), or Aqueye+ and Iqueye (Naletto et al 2009;Zampieri et al 2015) can achieve time resolutions of the order of tens of nanoseconds to hundreds of picoseconds, ARCONS is unique in that it is an Integral Field Unit, permitting it to obtain the spectrum of the observed object without the need for filters. ARCONS has been used to search for pulsations in the millisecond pulsar PSR J0337+1715 (Strader et al 2016).…”

Section: Array Camera For Optical To Near-ir Spectrophotometry (Arcons)mentioning

confidence: 99%

Search for Optical Pulsation in M82 X-2

Collura

Strader

Meeker

et al. 2017

ApJ

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We report on a search for optical pulsation from M82 X-2 over a range of periods. M82 X-2 is an X-ray pulsar with a 1.37s average spin period and a 2.5 day sinusoidal modulation. The observations were done with the ARray Camera for Optical to Near-IR Spectrophotometry at the 200 inch Hale telescope at the Palomar Observatory. We performed H test and χ 2 statistical analysis. No significant optical pulsations were found in the wavelength range of 3000-11000 Å with a pulsation period between 1.36262 and 1.37462 s. We found an upper limit on pulsed emission in the 4000-8000 Å wavelength range to be fainter than ∼20.5 mag AB , corresponding to ∼23 μJy.

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Section: Array Camera For Optical To Near-ir Spectrophotometry (Arcons)mentioning

confidence: 99%

Search for Optical Pulsation in M82 X-2

Collura

Strader

Meeker

et al. 2017

ApJ

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“…Aqueye and Iqueye ( Figure 1) are the prototypes for a quantum photometer for the future 40 m class telescopes such as the E-ELT 10 and represent the world recognized leading astronomical instruments for the shortest time scales in the optical band 6,7 . They couple the ultra-high time resolution of SPAD detectors with a split-pupil optical concept and a sophisticated timing system.…”

Section: Aqueye and Iqueyementioning

confidence: 99%

“…The signal from the SPADs is sent to a Time To Digital Converter (TDC) board, made by CAEN (Costruzioni Apparecchiature Elettroniche Nucleari, Italy), and then to a dedicated acquisition server 6,7,11 ( Figure 3). The TDC makes use of an external Rubidium clock and a GPS unit for checking the long time stability of the clock.…”

Section: Acquisition and Timing Systemmentioning

confidence: 99%

Aqueye+: a new ultrafast single photon counter for optical high time resolution astrophysics

et al. 2015

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Aqueye+ is a new ultrafast optical single photon counter, based on single photon avalanche photodiodes (SPAD) and a 4-fold split-pupil concept. It is a completely revisited version of its predecessor, Aqueye, successfully mounted at the 182 cm Copernicus telescope in Asiago. Here we will present the new technological features implemented on Aqueye+, namely a state of the art timing system, a dedicated and optimized optical train, a high sensitivity and high frame rate field camera and remote control, which will give Aqueye plus much superior performances with respect to its predecessor, unparalleled by any other existing fast photometer. The instrument will host also an optical vorticity module to achieve high performance astronomical coronography and a real time acquisition of atmospheric seeing unit. The present paper describes the instrument and its first performances.

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“…The data streams from multiple telescopes can then be cross-correlated in software, possibly applying noise filters and also computing other spatio-temporal parameters such as higher-order correlations between three or more telescopes, which could contain additional information. Such a capability is built into the AquEYE and IquEYE instruments developed at the University of Padova for very high time-resolution astrophysics with also a view towards intensity interferometry, using similar SPAD detectors as here [29][30][31] .…”

Section: Real-time Photon Correlationmentioning

confidence: 99%

Stellar intensity interferometry over kilometer baselines: laboratory simulation of observations with the Cherenkov Telescope Array

Dravins¹,

Lagadec²

2014

SPIE Proceedings

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A long-held astronomical vision is to realize diffraction-limited optical aperture synthesis over kilometer baselines. This will enable imaging of stellar surfaces and their environments, show their evolution over time, and reveal interactions of stellar winds and gas flows in binary star systems. An opportunity is now opening up with the large telescope arrays primarily erected for measuring Cherenkov light in air induced by gamma rays. With suitable software, such telescopes could be electronically connected and used also for intensity interferometry. With no optical connection between the telescopes, the error budget is set by the electronic time resolution of a few nanoseconds. Corresponding light-travel distances are on the order of one meter, making the method practically insensitive to atmospheric turbulence or optical imperfections, permitting both very long baselines and observing at short optical wavelengths. Theoretical modeling has shown how stellar surface images can be retrieved from such observations and here we report on experimental simulations. In an optical laboratory, artificial stars (single and double, round and elliptic) are observed by an array of telescopes. Using high-speed photon-counting solid-state detectors and real-time electronics, intensity fluctuations are cross correlated between up to a hundred baselines between pairs of telescopes, producing maps of the second-order spatial coherence across the interferometric Fourier-transform plane. These experiments serve to verify the concepts and to optimize the instrumentation and observing procedures for future observations with (in particular) CTA, the Cherenkov Telescope Array, aiming at order-of-magnitude improvements of the angular resolution in optical astronomy.

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Iqueye, a single photon-counting photometer applied to the ESO new technology telescope

Cited by 55 publications

References 19 publications

Search for Optical Pulsation in M82 X-2

Search for Optical Pulsation in M82 X-2

Aqueye+: a new ultrafast single photon counter for optical high time resolution astrophysics

Stellar intensity interferometry over kilometer baselines: laboratory simulation of observations with the Cherenkov Telescope Array

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