Multiwavelength observations of the Be/X-ray binary 4U1145-619

We report optical and infrared observations of the massive X-ray binary system 4U1145-619 (V801 Cen) which show that the circumstellar disc of the Be star component is in decline. Infrared J,H,K,L magnitudes of V801Cen have been monitored from 1993 March to 1996 April. H alpha spectra have been obtained throughout the same period. We find that both the infrared excess and the Balmer emission have been in decline throughout the period of observations. A 13 year optical and X-ray history of the source has been collated, revealing a possible correlation between the optical and X-ray activity. In addition, we have used u,v,b,y,beta indices, corrected for both circumstellar and interstellar effects, to calculate the physical parameters of the underlying B star.Comment: 8 pages postscript. Accepted by MNRA

História como alegoria

Neste artigo abordam-se as diferentes circunstâncias nas quais se tecem comentários sobre um evento (geralmente no passado) quando os comentadores estão, na verdade, preocupados com um outro evento (geralmente no presente). Nele, distingue-se a alegoria pragmática - que se encontra onde quer que haja restrições à liberdade de agilidade política - da alegoria mística - que pressupõe algum tipo de conexão oculta entre os dois acontecimentos. Este segundo tipo de alegoria entrou em declínio no fim do século xvii, mas poderá permanecer mais influente do que todos nós pensamos.<br>This article is concerned with the different circunstances in wich comments are made as one event (usually in the past) when the commentators are really preoccupied with another (usually in the present). It distinguishes pragmatic allegory, to be found whenever there are restrictions on freedom of political speed, from mystical allegory, which assumes some kind of occult connection between the two events. This second kind of allegory has been in decline since the end of the seventeenth century, but it may remain more influential on us all than we think