The 2003 November 14 occultation by Titan of TYC 1343-1865-1

We observed a stellar occultation by Titan on 2003 November 14 from La Palma Observatory using ULTRACAM with three Sloan filters: u, g, and i (358, 487, and 758 nm, respectively). The occultation probed latitudes 2°?S and 1°?N during immersion and emersion, respectively. A prominent central flash was present in only the i filter, indicating wavelength-dependent atmospheric extinction. We inverted the light curves to obtain six lower-limit temperature profiles between 335 and 485 km (0.04 and 0.003 mb) altitude. The i profiles agreed with the temperature measured by the Huygens Atmospheric Structure Instrument [Fulchignoni, M., and 43 colleagues, 2005. Nature 438, 785 791] above 415 km (0.01 mb). The profiles obtained from different wavelength filters systematically diverge as altitude decreases, which implies significant extinction in the light curves. Applying an extinction model [Elliot, J.L., Young, L.A., 1992. Astron. J. 103, 991 1015] gave the altitudes of line of sight optical depth equal to unity: 396±7 and 401±20 km (u immersion and emersion); 354±7 and 387±7 km (g immersion and emersion); and 336±5 and 318±4 km (i immersion and emersion). Further analysis showed that the optical depth follows a power law in wavelength with index 1.3±0.2. We present a new method for determining temperature from scintillation spikes in the occulting body's atmosphere. Temperatures derived with this method are equal to or warmer than those measured by the Huygens Atmospheric Structure Instrument. Using the highly structured, three-peaked central flash, we confirmed the shape of Titan's middle atmosphere using a model originally derived for a previous Titan occultation [Hubbard, W.B., and 45 colleagues, 1993. Astron. Astrophys. 269, 541 563].

Between Colonial Violence and Socialist Worldview: The Conversions of Ernst Daumig

In 1900, Ernst Däumig (1866–1922) wrote to Karl Kautsky of his ‘bitter experiences’ of violence in the French Foreign Legion and then in the Prussian military that had led to his recent ‘conversion’ to the socialist worldview. This article takes up Däumig's letters, articles and travelogues, and a drama, to explore how he recast his experiences of colonial and military violence twice, first as a writer for a German soldiers’ journal and then as an aspiring socialist journalist. As well as a burden that pushed him to critique his past, Däumig's military and colonial experiences are shown to have been his starting capital in the world of journalism and politics. The article gives particular attention to the process of conversion, through which Däumig forged a new life narrative out of the moral tales offered by the adopted worldview and the events of his own past. In addition to providing a case study of worldview conversion, this article demonstrates how biographical research can challenge assumptions about the impact of colonial violence on German metropolitan culture. At the same time, this biographical analysis sheds light on the early career of one of the key figures in the German Revolution of 1918 to 1921. As co-chairman of the Independent Social Democratic Party (USPD), Däumig led the USPD into union with the Communist Party in 1920.

Class, Factionalism, and the Radical Retreat: Black Laborers and the Republican Party in South Carolina, 1865-1900

a chapter-length piece in a collection which I've co-edited and written the introduction for, which examines class and other tensions in the ranks of the Republican party during and after Reconstruction in South Carolina, with a focus on the confrontation between insurgent former slaves and Party moderates over the social content of the RP programme.