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Time-resolved spectroscopy of the variable brown dwarf Kelu-1

Monthly Notices of the Royal Astronomical Society 341:1 (2003) 239-246

Authors:

FJ Clarke, CG Tinney, ST Hodgkin

Abstract:

We report the results of observations designed to investigate the spectroscopic signatures of dust clouds on the L2 brown dwarf Kelu-1. Time-resolved medium-resolution spectra show no significant evidence of variability in the dust-sensitive TiO, CrH and FeH bandheads on a time-scale of 1-24 h. We do, however, report periodic variability in the pseudo-equivalent width of Hα consistent with the 1.8-h rotation period previously reported for this object. Near-contemporaneous I-band photometry shows evidence for non-periodic variability at the level of 2 per cent.
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Time resolved spectroscopy of the variable brown dwarf Kelu-1

(2003)

Authors:

FJ Clarke, CG Tinney, ST Hodgkin
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Imaging Planets Around White Dwarfs

Chapter in White Dwarfs, Springer Nature (2003) 329-332

Authors:

Matt Burleigh, Fraser Clarke, Simon Hodgkin
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Periodic variability of the brown dwarf Kelu-1

BROWN DWARFS (2003) 457-458

Authors:

FJ Clarke, CG Tinney, ST Hodgkin
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Performance characteristics of the PAW instrumentation on Beagle 2 (The astrobiology lander on ESA's Mars express mission)

Proceedings of SPIE - The International Society for Optical Engineering 4859 (2002) 32-44

Authors:

MR Sims, D Pullan, GW Fraser, S Whitehead, J Sykes, J Holt, G Butcher, N Nelms, J Dowson, D Ross, C Bicknell, M Crocker, B Favill, A Wells, L Richter, H Kochan, H Hamacher, L Ratke, A Griffiths, A Coates, N Phillips, A Senior, J Zarnecki, MC Towner, MR Leese, M Patel, C Wilson, N Thomas, S Hviid, JL Josset, G Klingelhöfer, B Bernhardt, P Van Duijn, G Sims, KL Yung

Abstract:

The performance of the PAW instrumentation on the 60kg Beagle 2 lander for ESA's 2003 Mars Express mission will be described. Beagle 2 will search for organic material on and below the surface of Mars in addition to a study of the inorganic chemistry and mineralogy of the landing site. The lander will utilise acquisition and preparation tools to obtain samples from below the surface, and both under and inside rocks. In situ analysis will include examination of samples with an optical microscope, Mossbauer and fluorescent X-ray spectrometers. Extracted samples will be returned to the lander for analysis, in particular a search for organics and a measurement of their isotopic composition. The PAW experiment performance data will be described along with the status of the project.
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