Miguel Sawa y la Revista "Don Quijote" (1892-1903)

In late 19th century and early 20th coexisted in time in Spain a lot of writers, many of them well known today, but many others who haven’t been rescued yet. This stage has been called the Silver Age of Spanish literature. Among the best known and most representative of Madrid’s bohemian characters were the Sawa brothers: Manuel, Alejandro, Miguel and Enrique. All of them had related to the literature or journalism, in greater or lesser extent, and were very significant figures in their time. Alejandro, who reached a high literary level, has recently been subject of various studies and biographies which have located him in his place as a outstanding writer, rescuing him from forgetting where he remained sunk until a few decades ago. But it has not happened the same with the rest of the brothers, especially with Miguel, who was also a writer. The object of the first part of this thesis is to recover the figure of the Miguel Sawa, rebuilding his biography and both journalistic and literary career. Miguel Sawa, belonging to the so-called generation of literarian bohemia, born in Seville in 1866. After moving with his family to Málaga, where he spent his childhood, settled definitively in Madrid in 1880. In Madrid lived the atmosphere of the newspapers offices and the literarian gatherings of the “cafes”. He was a friend of Valle Inclán, the Machado brothers, the Baroja brothers, and belonged to the “Gente Nueva” and to the Germinal generation. In 1901 he married María Palacio, with whom he had a son, Emilio, who died before completing one year of life, and a daughter, Carmen, who had five years when Sawa died. After spending a season in La Coruña, as director of the newspaper La Voz de Galicia, returned to Madrid at the beginning of 1910, ready to continue his literary career, but died suddenly on 1 October of that same year because of a fulminant pneumonia...

Search for VHE gamma-ray emission from Geminga pulsar and nebula with the MAGIC telescopes

The Geminga pulsar, one of the brighest gamma-ray sources, is a promising candidate for emission of very-high-energy (VHE > 100 GeV) pulsed gamma rays. Also, detection of a large nebula have been claimed by water Cherenkov instruments. We performed deep observations of Geminga with the MAGIC telescopes, yielding 63 hours of good-quality data, and searched for emission from the pulsar and pulsar wind nebula. We did not find any significant detection, and derived 95% confidence level upper limits. The resulting upper limits of 5.3 × 10^(−13) TeV cm^(−2)s^(−1) for the Geminga pulsar and 3.5 × 10^(−12) TeV cm^(−2)s^(−1) for the surrounding nebula at 50 GeV are the most constraining ones obtained so far at VHE. To complement the VHE observations, we also analyzed 5 years of Fermi-LAT data from Geminga, finding that the sub-exponential cut-off is preferred over the exponential cut-off that has been typically used in the literature. We also find that, above 10 GeV, the gamma-ray spectra from Geminga can be described with a power law with index softer than 5. The extrapolation of the power-law Fermi-LAT pulsed spectra to VHE goes well below the MAGIC upper limits, indicating that the detection of pulsed emission from Geminga with the current generation of Cherenkov telescopes is very difficult.