Real-Time Flux Density Measurements of the 2011 Draconid Meteor Outburst

During the 2011 outburst of the Draconid meteor shower, members of the Video Meteor Network of the International Meteor Organization provided, for the first time, fully automated flux density measurements in the optical domain. The data set revealed a primary maximum at 20:09 UT ± 5 min on 8 October 2011 (195.036° solar longitude) with an equivalent meteoroid flux density of (118 ± 10) × 10/km/h at a meteor limiting magnitude of +6.5, which is thought to be caused by the 1900 dust trail. We also find that the outburst had a full width at half maximum of 80 min, a mean radiant position of α = 262.2°, δ = +56.2° (±1.3°) and geocentric velocity of v = 17.4 km/s (±0.5 km/s). Finally, our data set appears to be consistent with a small sub-maximum at 19:34 UT ±7 min (195.036° solar longitude) which has earlier been reported by radio observations and may be attributed to the 1907 dust trail. We plan to implement automated real-time flux density measurements for all known meteor showers on a regular basis soon.Peer reviewedFinal Accepted Versio

Romantic Metasubjectivity: Rethinking the Romantic Subject Through Schelling and Jung

This thesis takes up Friedrich Schelling’s philosophy and Carl Jung’s analytical psychology to develop Romantic metasubjectivity, a model of the subject absorbing more of the vast compass of Romantic thinking on subjectivity than what prevails in Romantic criticism. Romantic criticism tends to be dominated by psychoanalysis as well as deconstruction and poststructuralist theory, which see the subject as either a linguistic phenomenon or simply a locus of difference without a unified “I.” In response to this critical tradition, Romantic metasubjectivity discerns a notion of Self which is neither a linguistic fantasy nor a transcendental essence which is or becomes fully present to itself. The Introduction supplies historical and theoretical parameters for what follows, explaining why Schelling and Jung are crucial to the concept of Romantic metasubjectivity. The first chapter establishes analytical psychology as a Schellingian Naturphilosophie après la lettre, with the latter illuminating analytical psychology’s differences from psychoanalysis (particularly Jung’s rethinking of libido). The second chapter focuses on analytical psychology and Naturphilosophie to develop the topography of the Romantic metasubjective unconscious as a dissociative economy of energy. I establish Schelling’s actant and Jung’s archetype as isomorphic dynamisms which create this economy in Nature and the psyche, to articulate the uniquely Romantic historicity and materiality which resists coagulation into history and materialist notions of the subject. Chapter Three articulates the experience of Romantic metasubjectivity as a limit-experience of this dissociative historicity via Schelling’s idea of intellectual intuition (later ecstasy) and Jung’s development of synchronicity as an acausal connecting principle. Chapter Four focuses on the individuation of Romantic metasubjectivity as a radically non-teleological, purposively driven force of self-organisation which informs the person’s experience in the world. Paradoxically, it is Romantic metasubjectivity’s traumatic experience of historicity which both makes this individuation possible and guarantees its interminability. Chapter Five turns to Romantic literature, examining William Wordsworth’s The Prelude and Percy Shelley’s Prometheus Unbound as “case studies” of the Romantic metasubjective psyche. The Conclusion touches on John Caputo’s Against Ethics and the contemporary hit TV series Breaking Bad to question the possibility of a Romantic metasubjective ethics

Estimating meteor rates using Bayesian inference

A method for estimating the true meteor rate lambda from a small number of observed meteors n is derived. We employ Bayesian inference with a Poissonian likelihood function. We discuss the choice of a suitable prior and propose the adoption of Jeffreys prior, P(lambda)=lambda^-0.5, which yields an expectation value E(lambda) = n+0.5 for any n >= 0. We update the ZHR meteor activity formula accordingly, and explain how 68%- and 95%-confidence intervals can be computed.Peer reviewe

Voices from the classroom: An exploration of the perceptions of teaching assistants

This thesis was submitted for the degree of Education Doctorate awarded by Brunel University.On 13 September 2012 this thesis was published in book format by Lambert Academic Publishing under the title Voices from the classroom: An exploration of the perceptions of teaching assistants in primary, secondary and special schools. The book is available from the publishers and through other book outlets.This research gave voice to teaching assistants, exploring their experiences and perceptions, in terms of their backgrounds, roles and responsibilities, experiences whilst studying on an NVQ programme, support from their schools, their aspirations and the progression routes available to them. A small-scale phenomenological study approach was adopted, aimed to interpret and explain human actions and thought through descriptions, capturing first person accounts. Qualitative data was collected from focus group interviews. The research found that the main entry route into the role of teaching assistant was that of parent-helper at the school their child(ren) attended. Previous employment was varied, however, previous skills and experience was not drawn upon or utilised by the schools. Differences in job titles were not reflected by the roles performed by the participants. Support from their schools for undertaking qualifications was limited and participants had little knowledge of progression routes available to them. The research concluded that there is a need for a transparent career structure, which indicates levels of responsibility. Linked to this should be nationally recognised qualifications, which every member of support staff would have to gain, at the appropriate level for the role they fulfil. Wages should reflect the roles and associated qualifications, bringing about a clearer picture of the job of ‘teaching assistant’

A catalog of stars observed simultaneously by Kepler and TESS

The Kepler spacecraft provided the first long-baseline, high-precision photometry for large numbers of stars. This enabled the discovery of thousands of new exoplanets, and the characterization of myriad astrophysical phenomena. However, one of the challenges with interpreting Kepler data has been that no instrument has provided a comparison dataset. Therefore, the replication of Kepler time-series data has remained elusive. The Transiting Exoplanet Survey Satellite (TESS) launched in April 2018 and began science operations in July 2018. During the TESS primary mission, it will survey 85% of the sky. NASA's first two observatories dedicated to discovering exoplanets, Kepler and TESS, were simultaneously operating during 2018. While the Kepler's K2 mission surveyed the ecliptic plane, TESS targets fields outside the ecliptic. However, during September 2018, a small region of the sky was observed simultaneously by both TESS and Kepler as part of TESS's Sector 2 (Aug 22 - Sep 20, 2018) and K2 Campaign 19 (Sep 7 - Sep 26, 2018). The overlap region was 0.5 sq. deg. We identified 171 K2 targets that fell inside TESS Sector 2 field of view, all of which are observed at 30-minute cadence by both missions. The targets range in brightness in the TESS bandpass (Tmag) from 6.7-18.4, with 93 targets brighter than Tmag=15, and 17 brighter than Tmag=12. This dataset provides the first simultaneous, long-duration, high-precision observations of the same targets from different space-based observatories and presents an excellent opportunity to explore instrumental systematics present in the two telescopes.Comment: Published as a RNAAS, this version includes an additional figure not in the research note. The catalog is available from https://doi.org/10.6084/m9.figshare.7227260 in csv forma

Calibrated and completeness-corrected optical stellar density maps of the Northern Galactic Plane

© The Author 2016. Published by Oxford University Press on behalf of The Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.Following on from the second release of calibrated photometry from IPHAS, the INT/WFC Photometric Hα Survey of the Northern Galactic Plane, we present incompleteness-corrected stellar density maps in the r and i photometric bands. These have been computed to a range of limiting magnitudes reaching to 20th magnitude in r and 19th in i (Vega system), and with different angular resolutions – the highest resolution available being 1 arcmin2. The maps obtained cover 94 per cent of the 1800 square degree IPHAS footprint, spanning the Galactic latitude range, −5◦ < b < +5◦, north of the celestial equator. The corrections for incompleteness, due to confusion and sensitivity loss at the faint limit, have been deduced by the method of artificial source injection. The presentation of this method is preceded by a discussion of other more approximate methods of determining completeness. Our method takes full account of position-dependent seeing and source ellipticity in the survey data base. The application of the star counts to testing reddened Galactic disc models is previewed by a comparison with predicted counts along three constant-longitude cuts at 30◦, 90◦ and 175◦: some overprediction of the most heavily reddened 30◦ counts is found, alongside good agreement at 90◦ and 175◦. KeyPeer reviewedFinal Published versio

Galactic Plane Hα\alpha Surveys: IPHAS & VPHAS+

The optical Galactic Plane H$\alpha$ surveys IPHAS and VPHAS+ are dramatically improving our understanding of Galactic stellar populations and stellar evolution by providing large samples of stars in short lived, but important, evolutionary phases, and high quality homogeneous photometry and images over the entire Galactic Plane. Here I summarise some of the contributions these surveys have already made to our understanding of a number of key areas of stellar and Galactic astronomy.Comment: 5 pages, 2 figures, refereed proceeding of the "The Universe of Digital Sky Surveys" conference, November 2014, to be published in the Astrophysics and Space Science Proceeding