134 research outputs found

    Search for gravitational waves from Scorpius X-1 in the second Advanced LIGO observing run with an improved hidden Markov model

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    We present results from a semicoherent search for continuous gravitational waves from the low-mass x-ray binary Scorpius X-1, using a hidden Markov model (HMM) to track spin wandering. This search improves on previous HMM-based searches of LIGO data by using an improved frequency domain matched filter, the J-statistic, and by analyzing data from Advanced LIGO's second observing run. In the frequency range searched, from 60 to 650 Hz, we find no evidence of gravitational radiation. At 194.6 Hz, the most sensitive search frequency, we report an upper limit on gravitational wave strain (at 95% confidence) of h095%=3.47×10-25 when marginalizing over source inclination angle. This is the most sensitive search for Scorpius X-1, to date, that is specifically designed to be robust in the presence of spin wandering. © 2019 American Physical Society

    Erratum: "A Gravitational-wave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo" (2021, ApJ, 909, 218)

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    Biotechnological approaches for plant viruses resistance: from general to the modern RNA silencing pathway

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    Traditional and transgenic strategies for controlling tomato-infecting begomoviruses

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    Novel Loci for Adiponectin Levels and Their Influence on Type 2 Diabetes and Metabolic Traits : A Multi-Ethnic Meta-Analysis of 45,891 Individuals

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    J. Kaprio, S. Ripatti ja M.-L. Lokki työryhmien jäseniä.Peer reviewe

    Optical fibres based on phosphosilicate glass

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    The homogeneous chemical vapour-deposition technique, developed for the preparation of phosphosilicate glass fibres, is described. The properties of the binary phosphosilicate glass are outlined and details of preform fabrication and fibre drawing are given. Multimode graded-index fibres have been produced in lengths up to 4km, with numerical apertures up to 0.25, attenuations as low as 2 dB/km and with pulse dispersions of below 1ns/km depending on the source used. Single-mode fibres have also been made with attenuations close to that of pure bulk silica at the design wavelength and with a pulse dispersion of less than 0.1ns/km

    The early growth of artificially reared American lobsters

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