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Estudiando la evolución de galaxias con SCUBA2 COSMOLOGY LEGACY SURVEY

Estudiando la evolución de galaxias con SCUBA2 COSMOLOGY LEGACY SURVEY

1.2. SCUBA2 Cosmology Legacy Survey 9 funci ´on inicial de masa, etc.), muchos de estos test se basan en el n ´umero de cuentas (n ´umero de fuentes que hay en una determinada ´area por unidad de flujo), la distribuci ´on de corrimientos al rojo de las fuentes, el espectro de ra- diaci ´on de fondo submilim´etrico, entre otros (Blain & Longair, 1993; Blain et al., 2002; Hughes et al., 1998). Sin embargo, para determinar bien estas propiedades necesitamos mapas m´as profundos y m´as grandes con mejor resoluci ´on ´angu- lar, para acceder a las galaxias m´as d´ebiles, ser sensibles a propiedades como el agrupamiento y evitar las fluctuaciones estad´ısticas. El SCUBA2 Cosmology Le- gacy Survey y el Gran Telescopio Milim´etrico (GTM), los cuales se abordar´an a continuaci ´on, jugar´an un rol importante para lograr estos objetivos.
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The Chandra COSMOS Legacy Survey: Source X Ray Spectral Properties

The Chandra COSMOS Legacy Survey: Source X Ray Spectral Properties

The Chandra COSMOS-Legacy survey ( Civano et al. 2016 ) , with its relatively deep average coverage of ∼ 160 ks over 2.15 deg 2 , for a total of 4.6 Ms, provides an unprecedented data set to study the X-ray properties of AGNs over a wide range of redshifts and luminosities. Moreover, the COSMOS fi eld ( Scoville et al. 2007 ) has been covered with extended multiwavelength photometric ( Capak et al. 2007; Koekemoer et al. 2007; Sanders et al. 2007; Schinnerer et al. 2007; Taniguchi et al. 2007; Zamojski et al. 2007; Ilbert et al. 2009; McCracken et al. 2010; Laigle et al. 2016 ) and spectroscopic ( Lilly et al. 2007, 2009; Trump et al. 2007 ) observations, thus enabling us to identify and characterize ∼ 97% of the X-ray sources ( Marchesi et al. 2016a ) . Therefore, a complete analysis of the X-ray spectral parameters for different classes of optical sources is possible in Chandra COSMOS-Legacy. In this work, we present the X-ray spectral analysis of the 1855 extragalactic sources with more than 30 net counts in the 0.5 – 7 keV band in Chandra COSMOS-Legacy. In Section 2 we describe the Chandra COSMOS-Legacy survey, the X-ray catalog, and the optical / IR properties of the X-ray sources. In Section 3 we present the spectral extraction procedure, while in Section 4 we describe the different fi tting models we used and the results of the fi tting. In Section 5 we discuss the fi t parameter distribution. Finally, in Section 6 we discuss the properties of the z > 3 subsample, and in Section 7 we summarize the results of this work. Throughout the paper, we assume a cosmology with H 0 = 71 km s − 1 Mpc − 1 , W M = 0.3, and
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The swift gamma ray burst host galaxy legacy survey  I  Sample selection and redshift distribution

The swift gamma ray burst host galaxy legacy survey I Sample selection and redshift distribution

In this paper we introduce and summarize the largest and most ambitious survey of the GRB host galaxy population conducted to date, designed to move past these earlier limitations by constructing a sample that is large, unbiased, and thoroughly observed at a variety of wavelengths across the electromagnetic spectrum. Our effort, which we designate the Swift Gamma-Ray  Burst Host Galaxy Legacy Survey ( or “ SHOALS ”) , provides the most complete view ( in wavelength, redshift, and sample construction ) yet of the environments in which GRBs explode in order to rigorously examine all aspects regarding the connection between GRBs and galaxies across cosmic history. What is the GRB rate history? What is the distribution of properties among galaxies that host GRBs, how does it compare to the properties of galaxies thought to dominate the universe ’ s star formation activity, and how does this change with redshift? What fraction of the population originates from obscured regions or from dusty galaxies? What fraction originates from galaxies too faint to be detected at all? What can we learn by combining properties measured by observing GRB afterglows in absorption ( dust columns, kinematics, and gas / metal columns ) with those learned by studying their hosts in emission ( mass, SFR, morphology, and nebular abundance measurements ) ? Our survey seeks to answer these and similar questions.
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The Chandra COSMOS Legacy survey: optical/IR identifications

The Chandra COSMOS Legacy survey: optical/IR identifications

We present the catalog of optical and infrared counterparts of the Chandra  COSMOS-LegacySurvey, a 4.6 Ms Chandra  program on the 2.2 deg 2 of the COSMOS fi eld, combination of 56 new overlapping observations obtained in Cycle 14 with the previous C-COSMOS survey. In this Paper we report the i, K, and 3.6 μ m identi fi cations of the 2273 X-ray point sources detected in the new Cycle 14 observations. We use the likelihood ratio technique to derive the association of optical / infrared ( IR ) counterparts for 97% of the X-ray sources. We also update the information for the 1743 sources detected in C-COSMOS, using new K and 3.6 μ m information not available when the C-COSMOS analysis was performed. The fi nal catalog contains 4016 X-ray sources, 97% of which have an optical / IR counterpart and a photometric redshift, while ; 54% of the sources have a spectroscopic redshift. The full catalog, including spectroscopic and photometric redshifts and optical and X-ray properties described here in detail, is available online. We study several X-ray to optical ( X / O ) properties: with our large statistics we put better constraints on the X / O fl ux ratio locus, fi nding a shift toward faint optical magnitudes in both soft and hard X-ray band. We con fi rm the existence of a correlation between X / O and the the 2 – 10 keV luminosity for Type 2 sources. We extend to low luminosities the analysis of the correlation between the fraction of obscured AGNs and the hard band luminosity, fi nding a different behavior between the optically and X-ray classi fi ed obscured fraction.
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The Chandra COSMOS Legacy Survey: The z>3 Sample

The Chandra COSMOS Legacy Survey: The z>3 Sample

data ( orange squares ) . These studies used data sets that cover the range from the deep, pencil-beam area ( CDF-S, 0.13 deg 2 , fl ux limit in the 0.5 – 2 keV band f X ; 9.1 × 10 − 18 erg s − 1 cm − 2 , Figure 7. Euclidean normalized LogN–LogS relation in the 0.5–2 keV band for Chandra COSMOS-Legacy (red circles), for z>3 (left) and z>4 (right). Results from Vito et al. ( 2013, 4 Ms CDF-S, orange squares ) and Kalfountzou et al. ( 2014, C-COSMOS and ChaMP data, blue squares ) are also shown for comparison, together with examples of models with (black solid line, from Gilli et al. 2007) and without exponential decline (dashed line, from Treister et al. 2009). The pale red area is obtained by computing the number counts adding and subtracting to the fl ux value its 1 σ error. In the computation of the upper boundary, the weighted contribution of sources with no optical counterpart is also taken into account. All of the number counts are multiplied by ( S / 10 14 ) 1.5 to highlight the deviations from
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The Chandra COSMOS Legacy Survey: Energy Spectrum of the Cosmic X Ray Background and Constraints on Undetected Populations

The Chandra COSMOS Legacy Survey: Energy Spectrum of the Cosmic X Ray Background and Constraints on Undetected Populations

enough to neglect the fl ux of the PSF tails. Because of the mosaicking, with these choices we still cover most of the CCLS area and mask 3% of the pixels because of sources. This spectrum will be called uCXB ( unresolved CXB ) . According to Figure 2 of Civano et al. ( 2016 ) , and thanks to the tiling of the pointings, this radius safely includes almost the totality of the source fl uxes even without limiting the investigation to the inner FOV. Note that the Chandra PSF is not circular but is elongated as a function of the azimuthal angle. Nevertheless, we were able to use circular apertures because the asymmetry of the PSF is washed out by the tiling of the survey, which averages over azimuthal angles. See, e.g., the treatment of PSF fi tting in Cappelluti et al. ( 2016 ) .
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The Chandra Cosmos Legacy Survey: Overview and Point Source Catalog

The Chandra Cosmos Legacy Survey: Overview and Point Source Catalog

Thanks to the large area covered at considerable depth, COSMOS-Legacy can now address those questions for which a large number of detected X-ray sources at a medium depth with uniform multiwavelength coverage and almost complete red- shift information is needed. The excellent positional accuracy allows us to obtain multiwavelength identi fi cations and photometric redshifts for 96% of the sources ( Marchesi et al. 2016 ) . We are currently working on papers on the X-ray luminosity function with a focus on the high redshift universe ( S. Marchesi et al. 2016, in preparation ) ; the X-ray spectral analysis and X-ray variability of the bright sample with a focus on the hunt for obscured sources ( G. Lanzuisi et al. 2016, in preparation ) ; the multiwavelength spectral energy distribution fi tting with host galaxy properties ( mass and SF rates ) for both optically classi fi ed as obscured and unobscured sources ( H. Suh et al. 2016, in preparation ) ; clustering measurement and dark matter halo mass ( V. Allevato et al. 2016, in preparation ) ; and a catalog of X-ray extended sources ( Finoguenov et al. 2015, in preparation ) .
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Characterizing SL2S galaxy groups using the Einstein radius

Characterizing SL2S galaxy groups using the Einstein radius

The Strong Lensing Legacy Survey (SL2S 1 , Cabanac et al. 2007) selects its sample from the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) 2 . The SL2S has allowed us to find and study a large sample of group-scale lenses (More et al. 2012), as well as galaxy-scale gravitational lenses (Gavazzi et al. 2012). Some galaxy groups discovered in the SL2S have been studied in detail using different techniques (e.g., Tu et al. 2009; Limousin et al. 2009, 2010; Thanjavur et al. 2010; Verdugo et al. 2011), further highlighting the importance of SL2S. More et al. (2012) showed the first compilation of lens candidates, the SL2S-ARCS (SARCS) sample, consisting of 127 objects, with 54 systems labeled as promising lenses. The authors also present the first constraints on the average mass den- sity profile of groups using strong lensing. One of the main goals of the SL2S is to accurately determine the characteristics of the lensing groups through various methods, for example with dy- namics using spectroscopy (Muñoz et al. 2013) as well as weak lensing analysis and luminosity density maps (Foëx et al. 2013). In particular, the latter work combines lensing and optical anal- ysis to further constrain the sample, and presents a list of the 80 most secure lens candidates. Even though most of the ob- jects in the sample must be confirmed, these objects present a weak-lensing signal (detection at the 1σ level), and show an over-density in their luminosity density maps (see Foëx et al. 2013, for a detailed discussion). Thus, these candidates give us the opportunity to test a wide range of astrophysical problems and to probe diverse phenomena.
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First steps towards a tool for legacy systems

First steps towards a tool for legacy systems

The Legacy software change process should be divided into several stages, including the understanding stage and the transforming stage. These two stages are driven by change. A legacy tool should provide means for carrying out both stages: understanding and transforming tools which should be all integrated into a single tool. We have implemented two tools specifically focused to the understanding stage: the first one is a Static Call Tree View, and the second one is a COMMON BLOCK dependency analyzer. The Static Call Tree View can be used for understanding how the Fortran routines are related to one another. The COMMON BLOCK dependency analyzer shows how COMMON BLOCKS are used by the program routines or files. None of them has been previously integrated in a Fortran IDE.
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Evaluación de rendimiento de calidad a cinco híbridos de brócoli (Brassica oleracea var.Italica Plenk.) con tres densidades de siembra, en la Finca Parramos, Parramos  Chimaltenago

Evaluación de rendimiento de calidad a cinco híbridos de brócoli (Brassica oleracea var.Italica Plenk.) con tres densidades de siembra, en la Finca Parramos, Parramos Chimaltenago

La finca Parramos esta ubicada en el municipio de Parramos, Chimaltenango. Km. 64.5 Camino viejo a San Andrés Itzapa, cuenta con un área productiva para el establecimiento de cultivos de exportación, siendo el cultivo de brócoli (Brassica oleracea var.Italica Plenk.) fuente de ingresos económicos, trabajo. La producción está basada en el cultivo de brócoli con el híbrido Legacy su establecimiento ha sido continuo durante tres años anteriores, identificándose: una densidad poblacional de 40,000 plantas por hectárea, (tradicional) bajas en el rendimiento, deformación de la parte superior de la inflorescencia (pella), presentando compactación tipo no compacta, granulación mayoritariamente gruesa, afectando el mercado en fresco, que se caracteriza por brindar un producto con: granulación fina a media, ser compacto, sin deformidad en formación de pella.
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Sistema de control de producción para la empresa Confecciones Legacy de la ciudad de Otavalo

Sistema de control de producción para la empresa Confecciones Legacy de la ciudad de Otavalo

La ciudad de Otavalo también es conocida por su variedad en elaboración de prendas de vestir, empresas como “Artesanías INTY”, “NativeWool” y “Kichwa Trading” elaboran prendas de vestir con diseños exclusivos que definen la identidad cultural de la ciudad y que por ende se esfuerzan en fabricarlos con las mejores características. La empresa “Confecciones Legacy” al momento de realizar el proceso de producción no cuenta con un cálculo adecuado de la materia prima requerida para cumplir a cabalidad los pedidos efectuados a la misma, lo que ocasiona que en varias ocasiones muestre demora en los tiempos de producción por percances que están fuera de la planificación inicial.
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Determinación de la cinética de liofilización en  floretes de brócoli (Brassica oleracea L,  var.  Legacy)  y evaluación del contenido de ácido L - ascórbico  (L-AA)  y actividad peroxidasa (POD)

Determinación de la cinética de liofilización en floretes de brócoli (Brassica oleracea L, var. Legacy) y evaluación del contenido de ácido L - ascórbico (L-AA) y actividad peroxidasa (POD)

Este proyecto de investigación determina el contenido de los compuestos químicos (Peroxidasas) y nutricionales (Ácido L-ascórbico) en el proceso de liofilización, con y sin pre-tratamiento (escaldado al vapor) en la variedad de brócoli (Brassica oleracea L, var. Legacy). En el estudio de la composición funcional es necesario disponer de métodos analíticos apropiados, de elevada sensibilidad y selectividad, de forma que sea posible identificar y determinar de forma exacta el contenido de los diferentes compuestos (Peroxidasas y acido L-ascórbico) presentes. Por lo tanto, en este proyecto se hace necesario establecer métodos analíticos del tipo espectrométricos, que permite la identificación y cuantificación los compuestos funcionales. Por otra parte, estudiar el comportamiento del brócoli (Brassica oleracea L, var. Legacy) en el proceso de liofilización en relación con el pre-tratamiento (escaldado al vapor) ajustado con el modelo matemático URIF, el cual permite establecer el comportamiento de los datos experimentales.
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The legacy of care as reflexive learning

The legacy of care as reflexive learning

and interpretations the tutors and students developed with regard to the phenomena. The researcher developed the analysis. Sixty-eight first-order concepts emerged. At a second analysis level, eight thematic units or second-order concepts emerged: reflection as a source of learning, experience as a source of knowledge, tutor-student relationship, pedagogical activities, the art of the question, the role of the tutor, the role of the student and the legacy of professional identity. After the linear and cross-sectional analysis of the thematic units, the three theoretical constructs were developed which we call qualitative vectors and which subsumed the entire reality analyzed: the pedagogical relationship, experience-based learning and reflexive learning. In this study, a summary of the third vector is presented: reflexive learning. To facilitate the systematic and strict search and retrieval of the data, the software Atlas-ti version 6.2 was used.
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The Gondwanan legacy in South American biogeography

The Gondwanan legacy in South American biogeography

For example, the regional distribution pattern of tree species richness in western South American forests and its unexpected relationship with family age Segovia et al., 2013 seems incon[r]

9 Lee mas

Web Survey Methodology

Web Survey Methodology

Esta presentación sobre los autores concluye señalando que Lozar Manfreda se doctoró con un trabajo sobre errores en encuestas web (Lozar Manfreda, 2001), y que Callegaro y Vehovar han[r]

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Control de larvas de Plutella xylostella (L), CON Beauveria bassiana y Lecanicillium lecanii  EN BRÓCOLI  (Brassica oleracea var  Italica) cv  Legacy en dos localidades de Arequipa

Control de larvas de Plutella xylostella (L), CON Beauveria bassiana y Lecanicillium lecanii EN BRÓCOLI (Brassica oleracea var Italica) cv Legacy en dos localidades de Arequipa

The cultivation of broccoli (Brassica oleracea var. Italica) cv. Legacy is one of the most important vegetables in the region, there are a number of negative factors that threaten the quality of the crops of broccoli and other cruciferous worldwide and regionally, specifically the insect pests are responsible for increasing production, Plutella xylostella (L.) cabbage moth is considered the main problem worldwide, with the objective of controlling Plutella xylostella larvae (L) with the use of Beauveria bassiana and Lecanicillium lecanii in the cultivation of broccoli (Brassica oleracea L. italic var.) cv. Legacy in two localities of Arequipa, a completely random block design with factorial arrangement was used, between January and April of 2018 with evaluations of larvae population density before and after each application, number of leaves per plant, weight of pellet, performance and economic analysis, it has been observed in both locations that the use Beauveria bassiana dose 6 kg/200L, Lecanicillium lecanii dose 6 kg/200 L, achieved a control of larvae of the cabbage moth with an efficiency of between 100% and 90%, reaching a yield of 21t/ha.
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161 Lee mas

Partial distance-learning training for information technology higher education trainers

Partial distance-learning training for information technology higher education trainers

The web skills survey was not restricted to web browsing only; it also included the ability of the trainees to design web pages using Microsoft FrontPage or any HTML editor. Many web site designers use programs such as Flash or GIF to add attractive features to their web pages. Since this project aims to train the trainers, it is very important to know their levels using Microsoft Power Point.

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The next generation Virgo cluster survey (NGVS)  I  Introduction to the survey

The next generation Virgo cluster survey (NGVS) I Introduction to the survey

Being centered at relatively low ecliptic latitudes (β ≈ 14 ◦ , with coverage from 7 ◦ to 20 ◦ ), NGVS images are well suited for the study of outer solar system objects. Although there is no pre-defined cadence built into the acquisition of NGVS data, the step-dither procedure adopted to characterize the scattered light contamination (Section 3.5) implies that in each filter, images of several fields are acquired during a single night, and that the same fields are then imaged again multiple times over the course of several days or weeks. This observing strategy gives a temporal sampling that is, somewhat fortuitously, highly effective for the detection and tracking of outer solar system objects (see Figure 25). Acquired over timescales of days, months, and years, the NGVS images provide tracking observations that are unbiased by ephemeris predictions, an important point for characterized Kuiper Belt surveys (see Kavelaars et al. 2009). The large contiguous area of the survey protects against the loss of objects as they move between fields, since only a small fraction of sources move outside the full survey region. To guard against an “orbit sample bias” induced by object loss at the survey boundaries, we have undertaken follow-up programs using both MegaPrime on CFHT and the MegaCam instrument on the Magellan 6.5 m Clay telescope. Each of these cameras offer wide-field coverage (1 ◦ × 1 ◦ and 0. ◦ 4 × 0. ◦ 4, respectively), reducing the dependence of successful recovery on ephemeris predictions and protecting against tracking biases in our final orbit catalog. The ensemble of NGVS and related programs aimed at the study of the outer solar system is collectively known as the Deep Outer Solar System Survey (DOSSS). During the first three years of observations, DOSSS has detected and tracked 75 objects from a variety of subpopulations within the Kuiper Belt, including the second most distant known object (after Sedna; Brown et al. 2004) on an orbit that is not subject to scattering encounters with Neptune. DOSSS is providing a new and significant structural probe of the Kuiper Belt. Previous Kuiper Belt Object (KBO) surveys have covered nearly the entire northern sky to limits of g 22 mag (Schwamb et al. 2010), while ecliptic surveys have
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Planificación y diseño de la ampliación de cobertura de la red celular GSM y ajuste de parámetros (Initial Tuning) mediante un repetidor activo para la zona norte de la provincia de Napo para una Empresa de Telefonía Celular

Planificación y diseño de la ampliación de cobertura de la red celular GSM y ajuste de parámetros (Initial Tuning) mediante un repetidor activo para la zona norte de la provincia de Napo para una Empresa de Telefonía Celular

El objetivo principal del presente capítulo es realizar un estudio de la situación geográfica de la zona norte de la provincia de Napo, enfocada mas a la vía Quito- Papallacta, para establecer las condiciones de propagación, que lleven a determinar la ubicación más conveniente de un repetidor activo para poder ampliar la red de cobertura celular GSM y brindar un mejor servicio a los usuarios que circulan por esta carretera, aplicando el procedimiento de encuesta técnica del sitio “Technical Site Survey”.

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Métodos de acceso al medio para lograr calidad de servicio en redes WiFi

Métodos de acceso al medio para lograr calidad de servicio en redes WiFi

Las redes WiFi son redes inalámbricas donde el ancho de banda es compartido por todos los usuarios de la red lo que implica que se empleen mecanismos para el control del acceso al medio [21]. Debido a que los primeros estándares WiFi no proveían QoS en el acceso al medio como es el caso de: 802.11 Legacy, 802.11a, 802.11b y 802.11g los cuales ya fueron analizados en el epígrafe anterior, WiFi Alliance publica en el 2004 un certificado para soportar aplicaciones multimedia con calidad de servicio en redes WiFi o WMM, esto sirvió como antesala al estándar IEEE 802.11e publicado en el 2005, el cual define los mecanismos para lograr calidad de servicio en este tipo de redes [22].
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