Iain A. Steele

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Long-duration gamma-ray bursts (GRBs) release copious amounts of energy across the entire electromagnetic spectrum, and so provide a window into the process of black hole formation from the collapse of massive stars. Previous early optical observations of even the most exceptional GRBs (990123 and 030329) lacked both the temporal resolution to probe the(More)
1 Las Cumbres Observatory Global Telescope network, 6740 Cortona Drive, suite 102, Goleta, CA 93117, USA 2 Astrophysics Research Institute, Liverpool John Moores University, Liverpool CH41 1LD, UK 3 School of Physics and Astronomy, Univ. of St Andrews, Scotland KY16 9SS, UK 4 Isaac Newton Group of Telescopes, Apartado de Correos 321, E-38700 Santa Cruz de(More)
The dwarf planet Eris is a trans-Neptunian object with an orbital eccentricity of 0.44, an inclination of 44 degrees and a surface composition very similar to that of Pluto. It resides at present at 95.7 astronomical units (1 AU is the Earth-Sun distance) from Earth, near its aphelion and more than three times farther than Pluto. Owing to this great(More)
Around the time of its perihelion passage, the observability of 67P/Churyumov–Gerasimenko from Earth was limited to very short windows each morning from any given site, due to the low solar elongation of the comet. The peak in the comet’s activity was therefore difficult to observe with conventionally scheduled telescopes, but was possible where(More)
We describe the design, construction and commissioning of a simple, low-cost long-slit spectrograph for the Liverpool Telescope. The design is optimized for near-UV and visible wavelengths and uses all transmitting optics. It exploits the instrument focal plane field curvature to partially correct axial chromatic aberration. A stepped slit provides narrow(More)
Some of the first results are reported from RISE – a new fast camera mounted on the Liverpool Telescope primarily designed to obtain high time-resolution light curves of transiting extrasolar planets for the purpose of transit timing. A full and partial transit of WASP-3 are presented, and a Markov-Chain Monte Carlo analysis is used to update the parameters(More)
The study was set up to investigate the awareness of elderly patients and medical doctors of medical restrictions to driving. Separate questionnaires were completed by patients and doctors. All were interviewed face-to-face, without prior warning and their immediate answers were recorded. In total, 150 elderly patients from the acute elderly care wards,(More)
We present the first measurement of the planet frequency beyond the “snow line”, for the planet-to-star mass-ratio interval −4.5 < log q < −2, corresponding to the range of ice giants to gas giants. We find dNpl d log q d log s = (0.36± 0.15) dex at mean mass ratio q = 5×10−4 with no discernible deviation from a flat (Öpik’s Law) distribution in log(More)
We report the optical polarization of a gamma-ray burst (GRB) afterglow, obtained 203 seconds after the initial burst of gamma-rays from GRB 060418, using a ring polarimeter on the robotic Liverpool Telescope. Our robust (2sigma) upper limit on the percentage of polarization, less than 8%, coincides with the fireball deceleration time at the onset of the(More)
Searches for extrasolar planets have uncovered an astonishing diversity of planetary systems, yet the frequency of solar system analogs remains unknown. The gravitational microlensing planet search method is potentially sensitive to multiple-planet systems containing analogs of all the solar system planets except Mercury. We report the detection of a(More)