3,951 research outputs found
Cornelis A. ‘Neil’ Gehrels
No full textNeil Gehrels passed away on 6 February 2017. A pioneer of observational high-energy astrophysics, he was an exceptional leader, scholar, colleague and friend
Recent Results from Swift
No full textGehrels, Neil. (2013). Recent Results from Swift. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/158171
Neil Gehrels Swift Observatory studies of supersoft novae
No full textThe rapid response capabilities of the Neil Gehrels Swift Observatory, together with the daily planning of its observing schedule, make it an ideal mission for following novae in the X-ray and UV bands, particularly during their early phases of rapid evolution and throughout the supersoft source interval. Many novae, both classical and recurrent, have been extensively monitored by Swift throughout their supersoft phase and later decline. We collect here results from observations of novae with outbursts which occurred between the start of 2006 and the end of 2017
Neil Gehrels Swift Observatory studies of supersoft novae
No full textThe rapid response capabilities of the Neil Gehrels Swift Observatory, together with the daily planning of its observing schedule, make it an ideal mission for following novae in the X-ray and UV bands, particularly during their early phases of rapid evolution and throughout the supersoft source interval. Many novae, both classical and recurrent, have been extensively monitored by Swift throughout their supersoft phase and later decline. We collect here results from observations of novae with outbursts which occurred between the start of 2006 and the end of 2017
Ambiente galáctico y extragaláctico de grbs peculiares : estudio de los grbs 090426 y 120804a mediante el observatorio espacial neil gehrels swift componente b.
No full textEste trabajo presenta un análisis de los GRB090426 y GRB120804A utilizando datos del Observatorio Neil Gehrels Swift. Estos GRBs muestran características temporales similares a GRBs cortos mientras exhiben propiedades espectrales típicas de GRBs largos. Mediante el estudio de la evolución temporal y el entorno galáctico de estos estallidos, la investigación busca proporcionar información sobre su naturaleza peculiar y posibles progenitores. Los hallazgos contribuyen a una comprensión más amplia de la clasificación de GRBs y los procesos astrofísicos que rigen estos eventos cósmicos de alta energía.This work presents an analysis of the GRB090426 and GRB120804A utilizing data from the Neil Gehrels Swift Observatory. These GRBs exhibit temporal characteristics of short GRBs while displaying spectral properties typical of long GRBs. By studying the temporal evolution and galactic environment of these bursts, the research aims to provide insights into their peculiar nature and potential progenitors. The findings contribute to the broader understanding of GRB classification and the astrophysical processes governing these high-energy cosmic events
Facing the Future: the Changing Shape of Academic Skills Support at Bournemouth University
No full textThis paper explores the potential impact of changes to higher education in England on student expectations, engagement, lifestyles and diversity, and outlines implications for the development of digital literacy within academic skills support at Bournemouth University (BU). We will investigate how tackling resource constraints with organisational change can also enable efficient, centralised provision of support materials that utilise networks to overcome the risk of fragmented support for digital literacy. We will also look at how changing delivery modes for support can accommodate changing student lifestyles whilst tackling a weakness of centralised support for digital literacy: that it can become detached from the student’s subject-focused academic practice. Finally we will explore how involving students in developing support can help us to face changes to student expectations and engagement whilst ensuring that materials are authentic and speak to learners in their own voice
Ultraviolet and X-ray Light-Curves of Novae Observed by the Neil Gehrels Swift Observatory
No full textWith rapid response capabilities, and a daily planning of its observing schedule, the Neil Gehrels Swift Observatory is ideal for monitoring transient and variable sources. Here we present a sample of the 12 novae with the most detailed ultraviolet (UV) follow-up by Swift—the first uniform analysis of such UV light-curves. The fading of these specific light-curves can be modelled as power-law decays (plotting magnitude against log time), showing that the same physical processes dominate the UV emission for extended time intervals in individual objects. After the end of the nuclear burning interval, the X-ray emission drops significantly, fading by a factor of around 10–100. The UV changes, however, are of a lower amplitude, declining by 1–2 mag over the same time period. The UV light-curves typically show a break from flatter to steeper around the time at which the X-ray light-curve starts a steady decline from maximum, ∼0.7–1.3 TSSSend. Considering populations of both classical and recurrent novae, and those with main sequence or giant companions, we do not find any strong differences in the UV light-curves or their evolution, although the long-period recurrent novae are more luminous than the majority of the classical novae
Neil Gehrels–Swift Observatory’s Ultraviolet/Optical Telescope Observations of Small Bodies in the Solar System
No full textThe Neil–Gehrels Swift Observatory has added extensively to our understanding of small bodies in our solar system through its capabilities to rapidly respond to short-live events such as outbursts and collisions, through its near-ultraviolet coverage, and by its ability to track time-dependent changes through monitoring campaigns. These capabilities have enabled many significant studies, including the onset and evolution of different sources of water in comet C/2009 P1 (Garradd), the unprecedented changes in the rotation period of comet 41P/Tuttle–Giacobini–Kresák, near-UV spectroscopic observations of asteroids that can help us understand how their properties evolve over time, and the first observations of the aftermath of a collision between a 100 m sized asteroid and the large primitive asteroid 596 (Scheila). In this review paper, we will highlight some of the observational results of Swift-UVOT in the field of small-body research
Ultraviolet and X-ray Light-Curves of Novae Observed by the Neil Gehrels Swift Observatory
No full textWith rapid response capabilities, and a daily planning of its observing schedule, the Neil Gehrels Swift Observatory is ideal for monitoring transient and variable sources. Here we present a sample of the 12 novae with the most detailed ultraviolet (UV) follow-up by Swift—the first uniform analysis of such UV light-curves. The fading of these specific light-curves can be modelled as power-law decays (plotting magnitude against log time), showing that the same physical processes dominate the UV emission for extended time intervals in individual objects. After the end of the nuclear burning interval, the X-ray emission drops significantly, fading by a factor of around 10–100. The UV changes, however, are of a lower amplitude, declining by 1–2 mag over the same time period. The UV light-curves typically show a break from flatter to steeper around the time at which the X-ray light-curve starts a steady decline from maximum, ∼0.7–1.3 T (Formula presented.). Considering populations of both classical and recurrent novae, and those with main sequence or giant companions, we do not find any strong differences in the UV light-curves or their evolution, although the long-period recurrent novae are more luminous than the majority of the classical novae
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