Search for gravitational-wave transients associated with magnetar bursts in advanced LIGO and advanced Virgo data from the third observing run

Gravitational waves are expected to be produced from neutron star oscillations associated with magnetar giant f lares and short bursts. We present the results of a search for short-duration (milliseconds to seconds) and longduration (∼100 s) transient gravitational waves from 13 magnetar short bursts observed during Advanced LIGO, Advanced Virgo, and KAGRA’s third observation run. These 13 bursts come from two magnetars, SGR1935 +2154 and SwiftJ1818.0−1607. We also include three other electromagnetic burst events detected by FermiGBM which were identified as likely coming from one or more magnetars, but they have no association with a known magnetar. No magnetar giant flares were detected during the analysis period. We find no evidence of gravitational waves associated with any of these 16 bursts. We place upper limits on the rms of the integrated incident gravitational-wave strain that reach 3.6 × 10−²³ Hz at 100 Hz for the short-duration search and 1.1 ×10−²² Hz at 450 Hz for the long-duration search. For a ringdown signal at 1590 Hz targeted by the short-duration search the limit is set to 2.3 × 10−²² Hz. Using the estimated distance to each magnetar, we derive upper limits upper limits on the emitted gravitational-wave energy of 1.5 × 1044 erg (1.0 × 1044 erg) for SGR 1935+2154 and 9.4 × 10^43 erg (1.3 × 1044 erg) for Swift J1818.0−1607, for the short-duration (long-duration) search. Assuming isotropic emission of electromagnetic radiation of the burst fluences, we constrain the ratio of gravitational-wave energy to electromagnetic energy for bursts from SGR 1935+2154 with the available fluence information. The lowest of these ratios is 4.5 × 103

Open data from the third observing run of LIGO, Virgo, KAGRA, and GEO

The global network of gravitational-wave observatories now includes five detectors, namely LIGO Hanford, LIGO Livingston, Virgo, KAGRA, and GEO 600. These detectors collected data during their third observing run, O3, composed of three phases: O3a starting in 2019 April and lasting six months, O3b starting in 2019 November and lasting five months, and O3GK starting in 2020 April and lasting two weeks. In this paper we describe these data and various other science products that can be freely accessed through the Gravitational Wave Open Science Center at https://gwosc.org. The main data set, consisting of the gravitational-wave strain time series that contains the astrophysical signals, is released together with supporting data useful for their analysis and documentation, tutorials, as well as analysis software packages

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of binary black hole coalescences confidently observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include the effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that have already been identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total source-frame mass M > 70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz emitted gravitational-wave frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place a conservative upper limit for the merger rate density of high-mass binaries with eccentricities 0 < e ≤ 0.3 at 16.9 Gpc−3 yr−1 at the 90% confidence level

Conflict transformation: A longitudinal investigation of the relationships between different types of intragroup conflict and the moderating role of conflict resolution

In this longitudinal study, the authors examine the relationships between task, relationship, and process conflict over time. They also look at the role of conflict resolution in determining whether certain forms of intragroup conflict are related to the appearance of other forms of conflict over time. Their findings indicate a negative and long-lasting impact of process conflict occurring early in the team’s interaction. Specifically, they find that process conflict, but not task or relationship conflict, occurring early in a team’s interaction leads to higher levels of all other conflict types for the remaining interactions of the team. In addition, the authors find that the effect of process conflict on the other types of conflict over time may be limited when members are able to resolve their process conflicts at the start of their time together

What are we talking about when we talk about creativity: Group creativity as a multifaceted, multistage phenomenon

Psychologists have created highly specific and elaborate models of the creative process and the variables affecting creative performance. Unfortunately, much of this research has tended to take either an overanalytical or an underanalytical approach. By overanalytical we mean that researchers have studied single, isolated stages of group creativity, such as idea generation. By underanalytical we mean that researchers have tended to treat "creative group performance" as a single, unitary construct. However, we argue that it would be better to approach creativity as a multidimensional sequence of behaviors. In support of this argument, we discuss research on individual as well as group creativity showing that, firstly, there are multiple routes toward creative performance (e.g., flexibility and persistence), which may be pursued alone or in combination. It is likely that these different routes are subject to distinct influences. Secondly, we argue and show that different stages of the creative process (problem finding, idea generation, idea selection, idea implementation) are not necessarily affected by the same variables, or in the same way. We highlight some new questions for research, and discuss implications for the management of groups and teams

How project groups achieve coordinated action: A model of shared cognitions on time

This chapter addresses how project teams achieve coordinated action, given the diversity in how team members may perceive and value time. Although synchronization of task activities may occur spontaneously through the nonconscious process of entrainment, some work conditions demand that team members pay greater conscious attention to time to coordinate their efforts. We propose that shared cognitions on time – the agreement among team members on the appropriate temporal approach to their collective task – will contribute to the coordination of team members’ actions, particularly in circumstances where nonconscious synchronization of action patterns is unlikely. We suggest that project teams may establish shared cognitions on time through goal setting, temporal planning, and temporal reflexivity

The far-reaching effects of power: at the individual, dyadic, and group levels

Purpose - This chapter provides a framework that captures the fundamental impacts of power at the individual, dyadic, small group, and organizational levels. Within each level, we trace the psychological, cognitive, and behavioral consequences of having or lacking power. Approach - We integrate theoretical approaches from psychology, sociology, behavioral economics, and organizational theory to underscore the far-reaching effects that power has. Findings - We review theoretical and empirical evidence that demonstrate that (a) power leads people to take action, increases their general sense of control, and shape the way they construe the world; (b) power anesthetizes people to other people's emotions and immunizes them from the pressures of conformity; and (c) power differences within groups may facilitate group functioning by creating order, reducing conflict, and facilitating coordination. In addition to providing a framework for existing research on power, we also provide three research directions in hope of generating fruitful future research. Originality/value - Through a careful review of the literature, we demonstrate that power helps people know who does what, when, and how

Randomized controlled trial of the CGRP receptor antagonist telcagepant for prevention of headache in women with perimenstrual migraine

Paroxysmal Cerebral Disorder