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The ALHAMBRA photometric system  [PDF]
T. Aparicio Villegas,E. J. Alfaro,J. Cabrera-Cano,M. Moles,N. Benitez,J. Perea,A. del Olmo,A. Fernandez-Soto,D. Cristobal-Hornillos,C. Husillos,J. A. L. Aguerri,T. Broadhurst,F. J. Castander,J. Cepa,M. Cervino,R. M. Gonzalez Delgado,L. Infante,I. Marquez,J. Masegosa,V. J. Martinez,F. Prada,J. M. Quintana,S. F. Sanchez
Physics , 2010, DOI: 10.1088/0004-6256/139/3/1242
Abstract: This paper presents the characterization of the optical range of the ALHAMBRA photometric system, a 20 contiguous, equal-width, medium-band CCD system with wavelength coverage from 3500A to 9700A. The photometric description of the system is done by presenting the full response curve as a product of the filters, CCD and atmospheric transmission curves, and using some first and second order moments of this response function. We also introduce the set of standard stars that defines the system, formed by 31 classic spectrophotometric standard stars which have been used in the calibration of other known photometric systems, and 288 stars, flux calibrated homogeneously, from the Next Generation Spectral Library (NGSL). Based on the NGSL, we determine the transformation equations between Sloan Digital Sky Survey (SDSS) ugriz photometry and the ALHAMBRA photometric system, in order to establish some relations between both systems. Finally we develop and discuss a strategy to calculate the photometric zero points of the different pointings in the ALHAMBRA project.
Alhambra Declaration on Open Access (2010) Dichiarazione dell'Alhambra sull'accesso aperto (2010)
Redazione JLIS.it
JLIS.it , 2012, DOI: 10.4403/jlis.it-8632
Abstract: Issued in 2009, the Alhambra declaration aims at promoting common policies for Open Access in the South of Europe. Definita nel 2009, la Dichiarazione dell'Alhambra si propone di promuovere politiche comuni per l'accesso aperto nei paesi del Sud Europa.
Were customs dues levied at the time of the Prophet Mu ammad?  [cached]
Lecker, Michael
Al-Qantara : Revista de Estudios Arabes , 2001,
Abstract: The levying of customs was common in pre-Islamic Arabia. They were usually levied in the annual fairs and in Mecca, where Mu ammad's ancestor, Qusayy, reportedly levied them from the non-Meccans entering Mecca. Mu ammad continued this age-old practice, hence the phrase lā yu 'sharūna wa-lā yu sharūna in his letters to certain parties. It exempted these parties from the payment of customs, while all the others had to pay up. La leva de impuestos de aduana era práctica común en la Arabia preislámica. Se recaudaban en las ferias anuales y en La Meca, donde el antepasado de Mu ammad, Qusayy, los recaudaba entre los no-mequenses que entraban en la ciudad. Mu ammad continuó esta práctica ancestral, como atestigua la frase lā yu 'sharūna wa-lā yu sharūna en algunas cartas, frase por la cual los receptores quedaban exentos de los derechos de aduana, mientras que todo el resto tenía que pagarlos.
Un paseo por la Alhambra restaurada  [cached]
Gallego Roca, Francisco Javier
Informes de la Construccion , 1993,
Abstract: In this article, the author analyzes the impact which the restoration work undertaken in the Alhambra had on its present look. The idea of recomposing, without falsifying, the architectural elements and, that was most important, the capacity which restoration has to maintain the evocation power of the monument, guided the work done on this monument by various restoration architects. The replacement of the materials, permanent action through small repair works, as well as the consolidation of structures, both justified and necessary given the extreme fragility of the Alhambra architecture, have been, above all other considerations, the constant references in its preservation. El autor analiza en este artículo la incidencia que han tenido las restauraciones acometidas en la Alhambra en su imagen actual. La idea de recomponer, sin falsificaciones, los elementos arquitectónicos y, lo que es más significativo, la capacidad que tiene la restauración para mantener el poder de evocación del monumento, han presidido la labor desarrollada en el mismo por distintos arquitectos conservadores. La sustitución de os materiales, la permanente actuación mediante peque as obras de reparación, así como las de consolidación de sus estructuras, justificadas y necesarias dado el carácter extremadamente frágil de su arquitectura, han sido, por encima de otras consideraciones, las referencias constantes en la conservación del monumento.
La espada de protocolo del sultán nazarí Mu ammad V
Martínez Enamorado, Virgilio
Gladius , 2005, DOI: 10.3989/gladius.2005.32
Abstract: This article studies a nasri sword blade attributed to the sultan from Granada Mu ammad V. The study is focus in its inscriptions, sources and chronology, as well as its relation to other nasri swords. Este artículo estudia una hoja de espada nazarí atribuida al sultán Mu ammad V. El estudio se centra en sus inscripciones, sus fuentes y cronología, así como en su relación con otras espadas nazaríes.
History in the making: the ornament of the Alhambra and the past-facing present
Lara Eggleton
Journal of Art Historiography , 2012,
Abstract: This article examines the impact of nineteenth- and early twentieth-century European perspectives on the development of Alhambra scholarship. An Islamic palatine fortress built near the city of Granada during the Nasrid period (1232-1492), the monument has undergone substantial transformations under Christian occupation, and through its ‘rediscovery’ by foreign visitors in the nineteenth century. The fragmentation of its surfaces through a variety of Romantic and modernizing frameworks served to dislocate its decorative forms from their historical and architectural contexts, leading many historians to discuss its designs in relation to previous periods and traditions. The pervasive view of the Nasrid period and its art as ‘past-facing’ would postpone a critical consideration of the ornament of the Alhambra on its own formal and ideological terms. Only in recent decades has this position been challenged and the monument discussed in terms of its regional specificity and its multiple periods of production and reception.
The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41  [PDF]
I. Matute,J. Masegosa,I. Márquez,A. Fernández-Soto,C. Husillos,A. del Olmo,J. Perea,M. Povi?,B. Ascaso,E. J. Alfaro,M. Moles,J. A. L. Aguerri,T. Aparicio--Villegas,N. Benítez,T. Broadhurst,J. Cabrera--Cano,F. J. Castander,J. Cepa,M. Cervi?o,D. Cristóbal-Hornillos,L. Infante,R. M. González Delgado,V. J. Martínez,A. Molino,F. Prada,J. M. Quintana
Physics , 2013, DOI: 10.1051/0004-6361/201321920
Abstract: We aim to illustrate the potentiality of the Advanced Large, Homogeneous Area, Medium-Band Redshift Astronomical (ALHAMBRA) survey to investigate the high redshift universe through the detection of quasi stellar objects (QSOs) at redshifts larger than 5. The search for z>5 QSOs candidates was done by fitting an extensive library of spectral energy distributions --including active and non-active galaxy templates as well as stars-- to the photometric database of the ALHAMBRA survey (composed of 20 optical medium-band plus the 3 broad-band JHKs filters). Our selection over ~1 square degree of ALHAMBRA data (~1/4 of the total area covered by the survey), combined with GTC/OSIRIS spectroscopy, has yielded the identification of an optically faint QSO at very high redshift (z = 5.41). The QSO has an absolute magnitude of ~-24 at the 1450{\AA} continuum, a bolometric luminosity of ~2x10^46 erg/s and an estimated black hole mass of ~10^8 Msolar. This QSO adds itself to a reduced number of known UV faint sources at these redshifts. The preliminary derived space density is compatible with the most recent determinations of the high-z QSO luminosity functions (QLF). This new detection shows how ALHAMBRA, as well as forthcoming well designed photometric surveys, can provide a wealth of information on the origin and early evolution of this kind of objects.
The ALHAMBRA survey : Estimation of the clustering signal encoded in the cosmic variance  [PDF]
C. López-Sanjuan,A. J. Cenarro,C. Hernández-Monteagudo,P. Arnalte-Mur,J. Varela,K. Viironen,A. Fernández-Soto,V. J. Martínez,E. Alfaro,B. Ascaso,A. del Olmo,L. A. Díaz-García,Ll. Hurtado-Gil,M. Moles,A. Molino,J. Perea,M. Povi?,J. A. L. Aguerri,T. Aparicio-Villegas,N. Benítez,T. Broadhurst,J. Cabrera-Ca?o,F. J. Castander,J. Cepa,M. Cervi?o,D. Cristóbal-Hornillos,R. M. González Delgado,C. Husillos,L. Infante,I. Márquez,J. Masegosa,F. Prada,J. M. Quintana
Physics , 2015, DOI: 10.1051/0004-6361/201526731
Abstract: The relative cosmic variance ($\sigma_v$) is a fundamental source of uncertainty in pencil-beam surveys and, as a particular case of count-in-cell statistics, can be used to estimate the bias between galaxies and their underlying dark-matter distribution. Our goal is to test the significance of the clustering information encoded in the $\sigma_v$ measured in the ALHAMBRA survey. We measure the cosmic variance of several galaxy populations selected with $B-$band luminosity at $0.35 \leq z < 1.05$ as the intrinsic dispersion in the number density distribution derived from the 48 ALHAMBRA subfields. We compare the observational $\sigma_v$ with the cosmic variance of the dark matter expected from the theory, $\sigma_{v,{\rm dm}}$. This provides an estimation of the galaxy bias $b$. The galaxy bias from the cosmic variance is in excellent agreement with the bias estimated by two-point correlation function analysis in ALHAMBRA. This holds for different redshift bins, for red and blue subsamples, and for several $B-$band luminosity selections. We find that $b$ increases with the $B-$band luminosity and the redshift, as expected from previous work. Moreover, red galaxies have a larger bias than blue galaxies, with a relative bias of $b_{\rm rel} = 1.4 \pm 0.2$. Our results demonstrate that the cosmic variance measured in ALHAMBRA is due to the clustering of galaxies and can be used to characterise the $\sigma_v$ affecting pencil-beam surveys. In addition, it can also be used to estimate the galaxy bias $b$ from a method independent of correlation functions.
Gestión del agua subterránea en el Barrio Cerro Los Leones de Tandil (Argentina)
Rodriguez,Corina Iris; Jacinto,Guillermina; Ruiz de Galarreta,Alejandro; Banda Noriega,Roxana;
Ciencia, docencia y tecnolog?-a , 2010,
Abstract: the groundwater management in a peripheral neighborhood in tandil -cerro los leones-(buenos aires province, argentina), deprived of water supply and sewer, its social actors and the resource exploitation and use are considered in this paper. previous studies have shown chemical and bacteriological water contamination which generates a health risk for population. water exploitation and use conditions are characterized pointing out several faults in design, construction and maintenance of wells and cesspits. facing the needs and the challenge posed by an integrated water resource management, several guidelines aimed to sustainability were defined, including water use planning, drinking water supplying, boreholes design and environmental education.
The ALHAMBRA survey: Accurate merger fractions by PDF analysis of photometric close pairs  [PDF]
C. López-Sanjuan,A. J. Cenarro,J. Varela,K. Viironen,A. Molino,N. Benítez,P. Arnalte-Mur,B. Ascaso,L. A. Díaz-García,A. Fernández-Soto,Y. Jiménez-Teja,I. Márquez,J. Masegosa,M. Moles,M. Povi?,J. A. L. Aguerri,E. Alfaro,T. Aparicio-Villegas,T. Broadhurst,J. Cabrera-Ca?o,J. F. Castander,J. Cepa,M. Cervi?o,D. Cristóbal-Hornillos,A. Del Olmo,R. M. González Delgado,C. Husillos,L. Infante,V. J. Martínez,J. Perea,F. Prada,J. M. Quintana
Physics , 2014, DOI: 10.1051/0004-6361/201424913
Abstract: Our goal is to develop and test a novel methodology to compute accurate close pair fractions with photometric redshifts. We improve the current methodologies to estimate the merger fraction f_m from photometric redshifts by (i) using the full probability distribution functions (PDFs) of the sources in redshift space, (ii) including the variation in the luminosity of the sources with z in both the selection of the samples and in the luminosity ratio constrain, and (iii) splitting individual PDFs into red and blue spectral templates to deal robustly with colour selections. We test the performance of our new methodology with the PDFs provided by the ALHAMBRA photometric survey. The merger fractions and rates from the ALHAMBRA survey are in excellent agreement with those from spectroscopic work, both for the general population and for red and blue galaxies. With the merger rate of bright (M_B <= -20 - 1.1z) galaxies evolving as (1+z)^n, the power-law index n is larger for blue galaxies (n = 2.7 +- 0.5) than for red galaxies (n = 1.3 +- 0.4), confirming previous results. Integrating the merger rate over cosmic time, we find that the average number of mergers per galaxy since z = 1 is N_m = 0.57 +- 0.05 for red galaxies and N_m = 0.26 +- 0.02 for blue galaxies. Our new methodology exploits statistically all the available information provided by photometric redshift codes and provides accurate measurements of the merger fraction by close pairs only using photometric redshifts. Current and future photometric surveys will benefit of this new methodology.
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