© 2017. The American Astronomical Society. All rights reserved.We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J and H bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au orbit with a 68% confidence interval between 14 and 28 au, an eccentricity (...) of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M Jup. These results are consistent with previous measurements of the object. (shrink)

Originally published in 1950. For those interested in the fundamental problems of philosophy but not familiar with its technicalities, this book introduces the main type of theory in metaphysics, not by a catalogue of philosophers' opinions but by a continuous train of reasoning. The central theme is the problem of the relation between Mind and Matter, and in the course of the argument there are discussions of mechanistic materialism, of idealism and our knowledge of the external world, and of the (...) arguments for the existence of God. The problems are presented lucidly but without over-simplification. (shrink)

Originally published in 1933, in partnership with the Institute of Actuaries Students' Society, this book was written to provide actuarial students with an introduction to the operations of friendly societies. The text is highly accessible, avoiding references to external sources in favour of a more interconnected account of the subject. A concise bibliography is also included. This book will be of value to anyone with an interest in the history of friendly societies.