There is significant benefit to be gained by pursuing multi-messenger astronomy with gravitational wave and electromagnetic observations. In order to undertake electromagnetic follow-ups of gravitational wave signals, it will be necessary to accurately localize them in the sky. Since gravitational wave detectors are not inherently pointing instruments, localization will occur primarily through ...

The spatial resolution of PET scanners is degraded by a number of causes, both fundamental to the nature of positron decay, and to detectors. The crystal dimensions, their placement in the block and readout all contribute to the loss of resolution. We investigated the relative effects of sampling of the image space by the detectors, and the use of block detectors in a whole body PET scanner on ...

An experimental comparison of models for performing dead-time corrections of photon-counting detectors at synchrotron sources is presented. The performance of several detectors in the three operating modes of the Advanced Photon Source is systematically compared, with particular emphasis on asymmetric fill patterns. Several simple and well known correction formulas are evaluated. The results de...

In this work we propose to train boundary detectors using weakly supervised annotations. We propose and evaluate multiple strategies to generate annotations fusing different sources, such as unsupervised image segmentation [2], object proposal methods [10, 5], and object detectors [3, 6] (trained on bounding boxes). Figure 5 illustrates the examples of the proposed weakly supervised boundary an...

Cataclysmic cosmic events can be plausible sources of both gravitational waves (GW) and high-energy neutrinos (HEN). Both GW and HEN are alternative cosmic messengers that may escape very dense media and travel unaffected over cosmological distances, carrying information from the innermost regions of the astrophysical engines. For the same reasons, such messengers could also reveal new, hidden ...

The second-generation of gravitational-wave detectors are just starting operation, and have already yielding their first detections. Research is now concentrated on how to maximize the scientific potential of gravitationalwave astronomy. To support this effort, we present here design targets for a new generation of detectors, which will be capable of observing compact binary sources with high s...

Citation Regimbau, T. , and Scott A. Hughes. " Gravitational-wave confusion background from cosmological compact binaries: Implications for future terrestrial detectors. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please s...

We present a review of modern optical techniques being used and developed for the field of gravitational wave detection. We describe the current state-of-the-art of gravitational waves detector technologies with regard to optical layouts, suspensions and test masses. We discuss the dominant sources and noise in each of these subsystems and the developments that will help mitigate them for futur...

We have measured the spectrum of UHE cosmic rays in monocular mode using separately both detectors the High Resolution Fly’s Eye experiment. We describe the two detectors and the basic methods of analysis, and we present our measured spectra. We compare these spectra with that produced by an astrophysical source model with galactic and uniformly distributed extra-galactic sources. We also compa...