The first INTEGRAL-OMC catalogue of optically variable sources

The Optical Monitoring Camera (OMC) onboard INTEGRAL provides photometry in the Johnson V-band. With an aperture of 50 mm and a field of view of 5deg x 5deg, OMC is able to detect optical sources brighter than V~18, from a previously selected list of potential targets of interest. After more than nine years of observations, the OMC database contains light curves for more than 70000 sources (with more than 50 photometric points each). The objectives of this work have been to characterize the potential variability of the objects monitored by OMC, to identify periodic sources and to compute their periods, taking advantage of the stability and long monitoring time of the OMC. To detect potential variability, we have performed a chi-squared test, finding 5263 variable sources out of an initial sample of 6071 objects with good photometric quality and more than 300 data points each. We have studied the periodicity of these sources using a method based on the phase dispersion minimization technique, optimized to handle light curves with very different shapes.In this first catalogue of variable sources observed by OMC, we provide for each object the median of the visual magnitude, the magnitude at maximum and minimum brightness in the light curve during the window of observations, the period, when found, as well as the complete intrinsic and period-folded light curves, together with some additional ancillary data.Comment: Accepted by Astronomy & Astrophysics; 13 pages, 16 figures. Figures' resolution has been degraded to fit astro-ph constraint

A new genus of neobatrachian frog from southern Patagonian forests, Argentina and Chile

In 1975 Lynch named a new species of frog based on two specimens from Puerto Eden, Wellington Island, southern Chile, tentatively allocated to the genus Telmatobius. Telmatobius grandisonae Lynch was later included by the same author in his genus Atelognathus. Based on a reappraisal of the type material and the description of the internal and external morphology, karyotype, tadpole morphology and molecular evidence from recently discovered specimens collected at Lago del Desierto, southern Argentina, we describe the monotypic genus Chaltenobatrachus, with Telmatobius grandisonae (Lynch) serving as the type species. Chaltenobatrachus differs from Atelognathus mainly in having a uniform bright green dorsal coloration, with brown to reddish warts; orange iris with gold spots; fingers with interdigital membrane; frontoparietals well developed, small nasals; well ossified sphenethmoid; anteriorly expanded homosternum; skin of tadpole transparent; oral disc with protruding anterior and lateral papillae; diploid number 2n = 32 chromosomes. The genetic distances between Chaltenobatrachus and Atelognathus meet or exceed most other intergeneric comparisons.Fil: Basso, Nestor Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Úbeda, Carmen A.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Bunge, Maria M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Martinazzo Giménez, Liza Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentin

Limits to the planet candidate GJ 436c

We report on H-band, ground-based observations of a transit of the hot Neptune GJ 436b. Once combined to achieve sampling equivalent to archived observations taken with Spitzer, our measurements reach comparable precision levels. We analyze both sets of observations in a consistent way, and measure the rate of orbital inclination change to be of 0.02+/-0.04 degrees in the time span between the two observations (253.8 d, corresponding to 0.03+/-0.05 degrees/yr if extrapolated). This rate allows us to put limits on the relative inclination between the two planets by performing simulations of planetary systems, including a second planet, GJ 436c, whose presence has been recently suggested (Ribas et al. 2008). The allowed inclinations for a 5 M_E super-Earth GJ 436c in a 5.2 d orbit are within ~7 degrees of the one of GJ 436b; for larger differences the observed inclination change can be reproduced only during short sections (<50%) of the orbital evolution of the system. The measured times of three transit centers of the system do not show any departure from linear ephemeris, a result that is only reproduced in <1% of the simulated orbits. Put together, these results argue against the proposed planet candidate GJ 436c.Comment: Replaced with accepted version. Minor language corrections. 4 pages, 4 figures, to appear in A&A Letter

En el segundo centenario de la inauguración del Jardín Botánico de México

On 1st May 1788, the Botanic Garden was inaugurated in Mexico City on Martin de Sesse's initiative. He was the Leader of the Scientific Expedition to Nueva España, under the auspices of King Charles III and in cIose contac with the Royal Botanic Garden in Madrid, directed by Casimiro Gómez Ortega, who helped him from the mother country, This work studies the history of this, Garden, which helped the medical students of Mexico in their studies and experiments, and also the hospitals of the city and the studious of the medicine in Nueva España.El 1 de Mayo de 1788 fue inaugurado en la ciudad de México el Jardín Botánico a iniciativa de Martín de Sessé, director de la Expedición Científica a Nueva España, patrocinada por Carlos III y en estrecho contacto con el Real Jardín Botánico de Madrid, dirigido por Casimiro Gómez Ortega, que impulsó la empresa desde la metrópoli. Dicho centro, de cuya historia se trata en este trabajo, sirvió de estudio y experimentación a los estudiantes de la Facultad de Medicina de México, a los Hospitales de esta ciudad y a todos los interesados en la Materia Médica de Nueva España

Fuentes para el conocimiento de los usos y prácticas medicinales en nueva España en el siglo XVI

The relationship is established between the content of chapter XXVIII of Book X, of the "Historia General de las Cosas de Nueva España" by Fray Bemardino de Sahagún where the uses and applications of several drugs of both vegetal and animal origin by indigenouses and the text of Francisco Hemández "Historia Natural de Nueva España" , where these drugs are described in detail using the same denominations and indicating their main applications. These words serve as a connexion between the two texts, which represent toguether with other indian codes, an important contribution to the knowledge about the use, applications and skill of mexican medicine at the time of the Spanish arrival in this country.Se establece la relación que existe entre el contenido de parte del capítulo XXVIII, del Libro X, de la obra "Historia General de las Cosas de Nueva España", de Bemardino de Sahagún, donde se expone el uso y aplicaciones por parte de los indígenas de diversas drogas, tanto de origen vegetal como animal, y el texto de la obra de Francisco Hemández "Historia Natural de Nueva España", donde estas drogas, que tienen las mismas denominaciones en nahuatl, son ampliamente descritas, indicándose sus principales aplicaciones. Estos nombres sirven de nexo para la interpretación de ambos textos que representan, junto con determinados Códices indígenas, importantes aportaciones al conocimiento del uso, aplicaciones y virtudes medicinales de la Materia Médica mexicana en la época de la llegada de los españoles a este país

En el segundo centenario de la inauguración del Jardín Botánico de México

El 1 de Mayo de 1788 fue inaugurado en la ciudad de México el Jardín Botánico a iniciativa de Martín de Sessé, director de la Expedición Científica a Nueva España, patrocinada por Carlos III y en estrecho contacto con el Real Jardín Botánico de Madrid, dirigido por Casimiro Gómez Ortega, que impulsó la empresa desde la metrópoli. Dicho centro, de cuya historia se trata en este trabajo, sirvió de estudio y experimentación a los estudiantes de la Facultad de Medicina de México, a los Hospitales de esta ciudad y a todos los interesados en la Materia Médica de Nueva España.On 1st May 1788, the Botanic Garden was inaugurated in Mexico City on Martin de Sesse's initiative. He was the Leader of the Scientific Expedition to Nueva España, under the auspices of King Charles III and in cIose contac with the Royal Botanic Garden in Madrid, directed by Casimiro Gómez Ortega, who helped him from the mother country, This work studies the history of this , Garden, which helped the medical students of Mexico in their studies and experiments, and also the hospitals of the city and the studious of the medicine in Nueva España