The Science Performance of JWST as Characterized in Commissioning

This paper characterizes the actual science performance of the James Webb Space Telescope (JWST), as determined from the six month commissioning period. We summarize the performance of the spacecraft, telescope, science instruments, and ground system, with an emphasis on differences from pre-launch expectations. Commissioning has made clear that JWST is fully capable of achieving the discoveries for which it was built. Moreover, almost across the board, the science performance of JWST is better than expected; in most cases, JWST will go deeper faster than expected. The telescope and instrument suite have demonstrated the sensitivity, stability, image quality, and spectral range that are necessary to transform our understanding of the cosmos through observations spanning from near-earth asteroids to the most distant galaxies.Comment: 5th version as accepted to PASP; 31 pages, 18 figures; https://iopscience.iop.org/article/10.1088/1538-3873/acb29

The James Webb Space Telescope Mission

Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least $4m$. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the $6.5m$ James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 years, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit.Comment: Accepted by PASP for the special issue on The James Webb Space Telescope Overview, 29 pages, 4 figure

The antisocial trajectories in youth of adult sexual aggressors of women: a developmental framework for examining offending, motivation, and risk of recidivism in adulthood

Distinct typologies of sexual aggressors of women have been established over the years to explain their heterogeneity. To date, typologies have distinguished these offenders based on differences in victim and offence characteristics, motivation, and, the level of risk of reoffending posed by the offender. These distinct typologies have often emerged parallel to policies changing the way these offenders are dealt with in the criminal justice system. The current dissertation departs from previous classification strategies by exploring the utility of a developmental framework for classifying sexual aggressors of women. To this end, it is organized into three separate but related empirical studies. The first study examined the presence of antisocial trajectories in youth using a dynamic classification procedure and uncovered, contrary to current theoretical propositions, that the antisocial development of sexual aggressors of women in youth was characterized by much heterogeneity. More specifically, two meta-trajectories were uncovered, an early- and a late-onset trajectory, the former composed of three pathways, and the latter composed of two. Furthermore, the trajectories discovered were differentially related to several dimensions of general, violent, and sexual offending in adulthood. In the second study, the two meta-trajectories were examined in terms of mating effort and sexual drive, and while a high level of mating effort characterized the late-onset trajectory, the early-onset trajectory was characterized by both high mating effort and high sexual drive. In addition, sexual drive and mating effort were also related to an early-onset and higher frequency of sexual offending in adulthood suggesting that these measures may be associated with the motivation to sexually offend. In the third study, the two meta-trajectories were assessed in terms of their association with violent/sexual reoffending in adulthood. The results indicated that an early-onset antisocial trajectory, characterized by a pattern of escalation in youth, predicted violent/sexual reoffending in adulthood. In addition, the predictive aspect of these measures was demonstrated independently, and in conjunction with current measures that are typically included in many current actuarial risk assessment instruments. Taken together, the results of these three studies challenge current classification strategies, and, developmental conceptualizations, of sexual aggressors of women

The Science Performance of JWST as Characterized in Commissioning

This paper characterizes the actual science performance of the James Webb Space Telescope (JWST), as determined from the six month commissioning period. We summarize the performance of the spacecraft, telescope, science instruments, and ground system, with an emphasis on differences from pre-launch expectations. Commissioning has made clear that JWST is fully capable of achieving the discoveries for which it was built. Moreover, almost across the board, the science performance of JWST is better than expected; in most cases, JWST will go deeper faster than expected. The telescope and instrument suite have demonstrated the sensitivity, stability, image quality, and spectral range that are necessary to transform our understanding of the cosmos through observations spanning from near-earth asteroids to the most distant galaxies

The James Webb Space Telescope Mission

Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least 4 m. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the 6.5 m James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 yr, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit