20 citations · 37 across the 4 of their papers we have counts for
4 papers
First results of a cryogenic optical photon counting imaging spectrometer using a DROID array
R. A. Hijmering, P. Verhoeve, D. D. E. Martin +3
Context. In this paper 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 de…
Future optical detectors based on Al superconducting tunnel junctions
G. Brammertz, P. Verhoeve, D. Martin +2
Superconducting tunnel junctions are being developed for application as photon detectors in astronomy. We present the latest results on the development of very high quality, very l…
Direct determination of quasar redshifts
Jos de Bruijne, Alastair Reynolds, Michael Perryman +6
We present observations of 11 quasars, selected in the range z = 2.2-4.1, obtained with ESA's Superconducting Tunnel Junction (STJ) camera on the WHT. Using a single template quasa…
Development of practical soft X-ray imaging spectrometers
G. Brammertz, P. Verhoeve, A. Peacock +4
Cryogenic soft X-ray imaging spectrometers are currently being developed for applications in the fields of Astronomy and material sciences. In this paper we present experiments on…