Development of a very faint meteor detection system based on an EMCCD sensor and matched filter processing

Gural, Peter S.; Mills, T.; Mazur, Michael J.; Brown, Peter

doi:10.1007/s10686-021-09828-3

Cited by 3 publications

(1 citation statement)

References 36 publications

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“…This synthesis could potentially be improved if exact, rather than estimated, reference magnitudes for CMOR and VMN were to be published. The data also suggest that a meteor observation network of extremely sensitive cameras with a reference magnitude of approximately +6 (similar to electron-multiplied charge-coupled device, or EMCCD, cameras; Brown & Weryk 2020;Mills et al 2021;Gural et al 2022) would be a valuable addition.…”

Section: Discussionmentioning

confidence: 92%

A Reference Meteor Magnitude for Intercomparable Fluxes

Moorhead,

Vida,

Brown

et al. 2024

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The rate at which meteors pass through Earth’s atmosphere has been measured or estimated many times over; existing flux measurements span at least 12 astronomical magnitudes, or roughly five decades in mass. Unfortunately, the common practice of scaling flux to a universal reference magnitude of +6.5 tends to collapse the magnitude or mass dimension. Furthermore, results from different observation networks can appear discrepant due solely to the use of different assumed population indices, and readers cannot resolve this discrepancy without access to magnitude data. We present an alternate choice of reference magnitude that is representative of the observed meteors and minimizes the dependence of flux on population index. We apply this choice to measurements of recent Orionid meteor shower fluxes to illustrate its usefulness for synthesizing independent flux measurements.

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Section: Discussionmentioning

confidence: 92%

A Reference Meteor Magnitude for Intercomparable Fluxes

Moorhead,

Vida,

Brown

et al. 2024

Self Cite

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Quantifying the bulk density of southern delta aquariid meteoroids: insights from the Canadian automated meteor observatory

Pinhas,

Krzeminski,

Vida

et al. 2024

Monthly Notices of the Royal Astronomical Society

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Physical properties of ten millimeter-sized meteoroids from the Southern Delta Aquariids (SDA) shower are derived using optical observations from the Canadian Automated Meteor Observatory between 2020 and 2023. The meteors are found to ablate in two distinct erosion stages, the second stage showing a single, bright leading fragment. Our modelling interprets these observations as evidence for equal masses of compact grains embedded in a porous, low density matrix. The average bulk density of SDA meteors is found to be 1,420 ± 100 $\rm {kg \ m^{-3}}$, with the compact component having a density of 2,310 ± 160 $\rm {kg \ m^{-3}}$ and the porous component a density of 700 ± 110 $\rm {kg \ m^{-3}}$. The high bulk density of SDA meteors is comparable to densities found for the Quadrantid and Geminid showers, both of which also have low perihelion distances. This suggests that thermal desorption may play a significant role in the processing of meteoroids.

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Multifold enhancement of quantum SNR by using an EMCCD as a photon number resolving device

Chatterjee,

Bhat,

Bajar

et al. 2024

Optica Quantum

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Electron multiplying charge-coupled devices (EMCCDs), owing to their high quantum efficiency and spatial resolution, are widely used to study typical quantum optical phenomena and related applications. Researchers have already developed a procedure that enables one to statistically determine whether a pixel detects a single photon, based on whether its output is higher or lower than the estimated noise level. However, these techniques are feasible at extremely low photon numbers (≈0.15 mean number of photons per pixel per exposure), allowing for at most one photon per pixel. This limitation necessitates a very large number of frames required for any study. In this work, we present a method to estimate the mean rate of photons per pixel per frame for arbitrary exposure time. Subsequently, we make a statistical estimate of the number of photons (≥ 1) incident on each pixel. This allows us to effectively use the EMCCD as a photon number resolving device. This immediately augments the acceptable light levels in the experiments, leading to significant reduction in the required experimentation time. As evidence of our approach, we quantify contrast in quantum correlation exhibited by a pair of spatially entangled photons generated by a spontaneous parametric down conversion process. In comparison with conventional methods, our method realizes an enhancement in the signal-to-noise ratio (SNR) by approximately a factor of 3 for half the data collection time. This SNR can be easily enhanced by minor modifications in experimental parameters such as exposure time, etc.

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Development of a very faint meteor detection system based on an EMCCD sensor and matched filter processing

Cited by 3 publications

References 36 publications

A Reference Meteor Magnitude for Intercomparable Fluxes

A Reference Meteor Magnitude for Intercomparable Fluxes

Quantifying the bulk density of southern delta aquariid meteoroids: insights from the Canadian automated meteor observatory

Multifold enhancement of quantum SNR by using an EMCCD as a photon number resolving device

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