Maria Fortesa, una escriptora de paper : entorn la protagonista de Cap al cel obert de Carme Riera

Aquest article analitza la figura de Maria Fortesa / Maria de Fortalesa des d'una doble perspectiva. En primer terme, històrica. Maria és successora i representant dels xuetes mallorquins ajusticiats al segle XVII que, amb el canvi de continent i de posició social, mostra els contrastos entre les dues illes (Mallorca i Cuba) i el progrés del segle XIX basat en l'assimilació del discurs colonial. En segon lloc, a través de Maria, Carme Riera descriu la figura de la "literata"; mostra les contradiccions i restriccions de la primera generació d'escriptores modernes de la qual se sent deutora. D'altra banda, tot i la distància autoral que proporcionen les tècniques narratives de la ironia, la paròdia i l'ús del pastitx, no s'amaga l'escriptura com una passió irrefrenable -a través de l'escriptura epistolar- tot i que es manté allunyada dels models literaris reconeguts a l'època.Este artículo analiza la figura de Maria Fortesa / Maria de Fortalesa desde una doble perspectiva. En primer lugar, histórica. Maria desciende y representa a los "xuetas" mallorquines ajusticiados en el siglo XVII que, con el cambio de continente y de posición social, muestra los contrastes entre dos islas (Mallorca y Cuba) y el progreso del siglo XIX basado en la asimilación del discurso colonial. En segundo lugar, a través de Maria, su protagonista, Carme Riera describe la figura de la "literata"; muestra las contradicciones y restricciones impuestas a la primera generación de escritoras modernas de la cual se siente heredera. Así, tras la distancia autoral que proporcionan las técnicas narrativas de la ironía, la parodia y el uso del pastiche, emerge la escritura como una pasión irrefrenable -a través de la escritura epistolar- aunque se mantenga alejada de los modelos literarios reconocidos en su época.This article analyzes the figure of the lead character, Maria de Fortesa / Maria de Fortalesa, from two different perspectives. The first of which is the historical. Maria is the descendant of Majorcan Jews executed in the 17th century. With a change of continent and social status, her story illustrates the contrast between two islands (Majorca and Cuba) as well as the progress of the 19th Century and the assimilation of colonialism. Secondly, through Maria, Carme Riera describes the figure of the "literata" showing the contradictions and restrictions imposed upon the first generation of modern writers to whose legacy she feels herself an heir. Despite the distance of the author, which allows for the use of irony, parody and pastiche in the narrative, the piece displays an unstoppable passion -transmitted in the form of letter-writing, a style distanced from the recognised literary models of the time

DeepZipper. II. Searching for Lensed Supernovae in Dark Energy Survey Data with Deep Learning

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMGravitationally lensed supernovae (LSNe) are important probes of cosmic expansion, but they remain rare and difficult to find. Current cosmic surveys likely contain 5-10 LSNe in total while next-generation experiments are expected to contain several hundred to a few thousand of these systems. We search for these systems in observed Dark Energy Survey (DES) five year SN fields—10 3 sq. deg. regions of sky imaged in the griz bands approximately every six nights over five years. To perform the search, we utilize the DeepZipper approach: a multi-branch deep learning architecture trained on image-level simulations of LSNe that simultaneously learns spatial and temporal relationships from time series of images. We find that our method obtains an LSN recall of 61.13% and a false-positive rate of 0.02% on the DES SN field data. DeepZipper selected 2245 candidates from a magnitude-limited (m i < 22.5) catalog of 3,459,186 systems. We employ human visual inspection to review systems selected by the network and find three candidate LSNe in the DES SN fieldsThe DES participants from Spanish institutions are partially supported by MICINN under grants ESP2017-89838, PGC2018-094773, PGC2018-102021, SEV-2016-0588, SEV-2016-0597, and MDM-2015-0509, some of which include ERDF funds from the European Union

The DESI survey validation: results from visual inspection of the quasar survey spectra

Artículo escrito por un elevado número de autores, sólo se referencian el que aparece en primer lugar, los autores pertenecientes a la UAM y el nombre del grupo de colaboración, si lo hubiereA key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) of the optical spectroscopic data to quantify key survey metrics. In this paper we present results from VI of the quasar survey using deep coadded SV spectra. We show that the majority (≈70%) of the main-survey targets are spectroscopically confirmed as quasars, with ≈16% galaxies, ≈6% stars, and ≈8% low-quality spectra lacking reliable features. A nonnegligible fraction of the quasars are misidentified by the standard spectroscopic pipeline, but we show that the majority can be recovered using post-pipeline “afterburner” quasar-identification approaches. We combine these “afterburners” with our standard pipeline to create a modified pipeline to increase the overall quasar yield. At the depth of the main DESI survey, both pipelines achieve a good-redshift purity (reliable redshifts measured within 3000 km s−1) of ≈99%; however, the modified pipeline recovers ≈94% of the visually inspected quasars, as compared to ≈86% from the standard pipeline. We demonstrate that both pipelines achieve a median redshift precision and accuracy of ≈100 km s−1 and ≈70 km s−1, respectively. We constructed composite spectra to investigate why some quasars are missed by the standard pipeline and find that they are more host-galaxy dominated (i.e., distant analogs of “Seyfert galaxies”) and/or more dust reddened than the standard-pipeline quasars. We also show example spectra to demonstrate the overall diversity of the DESI quasar sample and provide strong-lensing candidates where two targets contribute to a single spectrum

Astrometric Calibration and Performance of the Dark Energy Spectroscopic Instrument Focal Plane

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMThe Dark Energy Spectroscopic Instrument, consisting of 5020 robotic fiber positioners and associated systems on the Mayall telescope at Kitt Peak, Arizona, is carrying out a survey to measure the spectra of 40 million galaxies and quasars and produce the largest 3D map of the universe to date. The primary science goal is to use baryon acoustic oscillations to measure the expansion history of the universe and the time evolution of dark energy. A key function of the online control system is to position each fiber on a particular target in the focal plane with an accuracy of 11 μm rms 2D. This paper describes the set of software programs used to perform this function along with the methods used to validate their performanceThis work was produced, in part, by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. This material is based upon work supported by the U.S. Department of Energy (DOE), Office of Science, Office of High Energy Physics, under Contract No. DE-AC02-05CH11231, and by the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility under the same contract. Additional support for DESI was provided by the U.S. National Science Foundation (NSF), Division of Astronomical Sciences under Contract No. AST-0950945 to the NSF’s National Optical Infrared Astronomy Research Laboratory; the Science and Technology Facilities Council of the United Kingdom; the Gordon and Betty Moore Foundation; the Heising-Simons Foundation; the French Alternative Energies and Atomic Energy Commission (CEA); the National Council of Science and Technology of Mexico (CONACYT); the Ministry of Science and Innovation of Spain (MICINN), and by the DESI Member Institutions: https://www.desi.lbl.gov/collaborating-institution

The Atacama Cosmology Telescope: a catalog of > 4000 Sunyaev-Zel'dovich galaxy clusters

Artículo escrito por un elevado número de autores, solo se referencia el que aparece en primer lugar, el nombre del grupo de colaboración, si lo hubiere, y los autores pertenecientes a la UAMWe present a catalog of 4195 optically confirmed Sunyaev–Zel’dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg2 of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying a multifrequency matched filter to 98 and 150 GHz maps constructed from ACT observations obtained from 2008 to 2018 and confirmed using deep, wide-area optical surveys. The clusters span the redshift range 0.04 3.8 × 1014 Me, evaluated at z = 0.5, for clusters detected at signal-to-noise ratio >5 in maps filtered at an angular scale of 2 4. The survey has a large overlap with deep optical weak-lensing surveys that are being used to calibrate the SZ signal mass-scaling relation, such as the Dark Energy Survey (4566 deg2), the Hyper Suprime-Cam Subaru Strategic Program (469 deg2), and the Kilo Degree Survey (825 deg2). We highlight some noteworthy objects in the sample, including potentially projected systems, clusters with strong lensing features, clusters with active central galaxies or star formation, and systems of multiple clusters that may be physically associated. The cluster catalog will be a useful resource for future cosmological analyses and studying the evolution of the intracluster medium and galaxies in massive clusters over the past 10 Gy