The Deep Impact Event as Seen from the University of Nariño Observatory – Colombia

The Astronomical Observatory of the University of Nariñno has participated in the program STSP (The Small Telescope Science Program), associate to the project DEEP IMPACT of NASA, by sending photographies and scientific data. We began to study comet 9P/Tempel 1’s activity in February 2005, and we have obtained the comet’s brightnes curve. The great many data taken during every night have a standard deviation of just 0.03 in magnitude. By means of the curve we can compare the physical behavior before and after the impact. A slight change in the magnitude can be observed as the comet gets closer firstly to the Earth and then to the Sun. Nevertheless, we have detected an abrupt change in the luminous activity after the impact that took place at dawn of July 4th. The magnitude dicreased in 0.76 during the night of that same day. The brightness measurements taken after the impact indicate a greater variation with regard to the average value than those taken before the collision. This could indicate that the system nucleus-coma of the comet acquired a certain instability, an instability which lasted several hours

The Deep impact event as seen from the University of Nariño Observatory - Colombia

The Astronomical Observatory of the University of Nariñno has participated in the program STSP (The Small Telescope Science Program), associate to the project DEEP IMPACT of NASA, by sending photographies and scientific data

Obtención de la Curva Luminosa de los Cometas C/2002T7 Linear,C/2001Q4 Neat y Espectrometría del C/2001Q4 Neat

En el presente trabajo mediante fotometría se obtuvo las curva de los cometas C/2002 T7 LINEAR y C/2001 Q4 NEAT y con base a ellas los respectivos índices cometarios y magnitudes absolutas para los astros citados. Para el primer cometa (cuando se acercaba al sol) el índice se calculó en 4 y su magnitud absoluta en 4.3. Para el segundo cometa, el índice se estimó en 8.4 y su magnitud absoluta en 6.2. Fue difícil predecir los parámetros correspondientes al cometa NEAT porque sólo se contó con 11 días entre la primera observación y el máximo acercamiento a la Tierra. Con la determinación de la magnitud absoluta y mediante la relación de David Hughes se estimó el radio del núcleo del cometa C/2002 T7 LINEAR en aproximadamente 2.7 kilómetros y su masa en 4.3x10 13 kilogramos . Mediante estudio espectrométrico de la coma del cometa C/2001 Q4 NEAT se detectó claramente la presencia de las bandas correspondientes a : C 2 ( D n = -1) , C 2 ( D n = 0), C 2 ( Dn = 1) y CN. No se detectaron las bandas de C 3 y la de C 2 ( D n = 2), bandas que otros autores observaron en el cometa Hale-Bopp

Dissemination of high-risk clones of extensively drug-resistant pseudomonas aeruginosa in Colombia

The ability of Pseudomonas aeruginosa to develop resistance to most antimicrobials represents an important clinical threat worldwide. We report the dissemination in several Colombian hospitals of two predominant lineages of extensively drug-resistant (XDR) carbapenemase-producing P. aeruginosa strains. These lineages belong to the high-risk clones sequence type 111 (ST111) and ST235 and harbor blaVIM-2 on a class 1 integron and blaKPC-2 on a Tn4401 transposon, respectively. Additionally, P. aeruginosa ST1492, a novel single-locus variant of ST111, was identified. Clonal dissemination and the presence of mobile genetic elements likely explain the successful spread of XDR P. aeruginosa strains in Colombia.This work was supported by Merck Sharp & Dohme, Janssen-Cilag SA, Pfizer SA, AstraZeneca Colombia SA, Merck Colombia, Novartis, Amarey Novamedical, Merck S.A, and bioMérieux Colombia, which help fund the Colombian Nosocomial Resistance Study Group (CNRSG). The research of Rafael Cantón at the Microbiology Department of Ramón y Cajal University Hospital is funded by the European Commission (grants R-GNOSIS-FP7-HEALTH-F3-2011-282512 and FP7-HEALTH-F3-2013-MON4STRAT-602906-2) and the Instituto de Salud Carlos III of Spain, cofinanced by the European Development Regional Fund (A Way to Achieve Europe program; Spanish Network for Research in Infectious Diseases grant REIPI RD12/0015)