Temperature determination via STJ optical spectroscopy

Reynolds, A. P.; Bruijne, J. H. J. de; Perryman, M. A. C.; Peacock, A.; Bridge, Chris

doi:10.1051/0004-6361:20030042

Cited by 11 publications

(7 citation statements)

References 27 publications

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“…The real advantages of superconducting detectors for optical astronomy are energy resolution (R = E/∆E ≈ 50), read noise free output, microsecond timing, and an incredibly large simultaneous wavelength sensitivity -potentially 0.1-6 microns from space (though their quantum efficiency decreases in the infrared as the absorbing metal films become more reflective). They will excel in observations of rare, extremely faint sources where every photon matters [50,51], and for objects showing fast time variability, like pulsars [52,53,54,55], magnetic white dwarfs [56], cataclysmic variables [57], and low-mass X-ray binaries (LMXBs). Figure 1.6 show the kind of combined spectral and timing data that make these devices so interesting.…”

Section: Opticalmentioning

confidence: 99%

Microwave Kinetic Inductance Detectors

Mazin

2021

The WSPC Handbook of Astronomical Instrumentation

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This work would have been impossible without the patient help of this technology's inventors, Professor Jonas Zmuidzinas and Dr. Rick LeDuc. Professor Zmuidzinas unparalleled understanding of the issues involved in all stages of the project is remarkable, and I am grateful for the time and effort he has patiently put into helping me understand this complex field. It seems that many successful efforts in low temperature detectors depend not only on cleverness of concept but also in actually fabricating the devices you envision; I am very glad we had Dr. LeDuc's expert hand guiding the mask design and fabrication process.Dr. Peter Day has greatly contributed to both the data and theory efforts, running a parallel effort at JPL. Many of the good ideas dealing with the cryogenics and thinking about the data are his. Also involved were Anastasios Vayonakis, who developed the 50 GHz low-pass filters and calculated the radiation loss, and Dr. Peter Mason, who has helped out with the cryogenics. Professor Sunil Golwala has helped me to understand the intricacies of dark matter detection. Jiansong Gao and Shwetank Kumar have helped with the simulation and design of the etched CPW devices.

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Section: Opticalmentioning

confidence: 99%

Microwave Kinetic Inductance Detectors

Mazin

2021

The WSPC Handbook of Astronomical Instrumentation

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“…The resulting data can be analysed in terms of energy (colour) bands and their associated ratios (Perryman et al 2001) or even direct spectral fitting (de Bruijne et al 2002;Reynolds et al 2003). In this paper we extend this spectralfitting to accommodate the presence of emission lines, a particularly useful technique for cataclysmic variables due to the swiftness of the eclipse transitions.…”

Section: Spectral Propertiesmentioning

confidence: 99%

High-speed, energy-resolved STJ observations of the AM Her system V2301 Oph

Reynolds¹,

Ramsay

Bruijne³

et al. 2005

A&A

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Abstract. We present high time-resolution optical energy-resolved photometry of the eclipsing cataclysmic variable V2301 Oph made using the ESA S-Cam detector, an array of photon counting super-conducting tunnel junction (STJ) devices with intrinsic energy resolution. Three eclipses were observed, revealing considerable variation in the eclipse shape, particularly during ingress. The eclipse shape is shown to be understood in terms of AM Her accretion via a bright stream, with very little contribution from the white dwarf photosphere and/or hotspot. About two thirds of the eclipsed light arises in the threading region. Variation in the extent of the threading region can account for most of the variations observed between cycles. Spectral fits to the data reveal a 10 000 K blackbody continuum with strong, time-varying emission lines of hydrogen and helium. This is the first time that stellar emission lines have been detected in the optical band using a non-dispersive photon-counting system.

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“…Precise timing of the Crab-pulsar light curve has shown that the optical pulses have a lead on the radio pulses by 273 ± 65 μs (Perryman et al 1999;Oosterbroek et al 2006). The spectral information provided by the STJs has made possible the direct determination of quasar redshifts (de Bruijne et al 2002b) and stellar temperatures (Reynolds et al 2003). The next step is to increase the field of view further with the use of DROIDs.…”

Section: Introductionmentioning

confidence: 99%

First results of a cryogenic optical photon-counting imaging spectrometer using a DROID array

Hijmering¹,

Verhoeve²,

Martin³

et al. 2010

A&A

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Context. We present the first system test in which we demonstrate the concept of using an array of Distributed Read Out Imaging Devices (DROIDs) for optical photon detection. Aims. After the successful S-Cam 3 detector, the next step in the development of a cryogenic optical photon counting imaging spectrometer under the S-Cam project is to increase the field of view using DROIDs. With this modification the field of view of the camera has been increased by a factor of five in a given area while keeping the number of readout channels the same. Methods. The test has been performed using the flexible S-Cam 3 system and exchanging the 10 × 12 Superconducting Tunnel Junction array for a 3 × 20 DROID array. The extra data reduction needed with DROIDs is performed offline. Results. We show that, although the responsivity (number of tunnelled quasiparticles per unit of absorbed photon energy, e − /eV) of the current array is too low for direct astronomical applications, the imaging quality is already good enough for pattern detection and will improve further with increasing responsivity. Conclusions. The obtained knowledge can be used to optimise the system for the use of DROIDs.

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Temperature determination via STJ optical spectroscopy

Cited by 11 publications

References 27 publications

Microwave Kinetic Inductance Detectors

Microwave Kinetic Inductance Detectors

High-speed, energy-resolved STJ observations of the AM Her system V2301 Oph

First results of a cryogenic optical photon-counting imaging spectrometer using a DROID array

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