Browsing by Subject "Methods: data analysis"

Now showing items 1-20 of 24

    • A 3D Voronoi+Gapper Galaxy Cluster Finder in Redshift Space to z ∼ 0.2. II. An Abundant Cluster Population ... 
      Campusano Brown, Luis; Marinello, Gabriel; Clowes, Roger G.; Haines, Christopher P.; Pereira, Sebastián; Pizarro, Daniel; Hitschfeld Kahler, Nancy; Söchting, Ilona K. (IOP, 2020)
      We identify 1901 galaxy clusters (N-g >= 2) with the VoML+G algorithm (Paper I) on the Two-Degree Field Galaxy Redshift Survey. We present the 341 clusters with at least 10 galaxies that are within 0.009 < z < 0.14 (the ...
    • Block time step storage scheme forastrophysical n-body simulations 
      Cai, Maxwell Xu; Meiron, Yohai; Kouwenhoven, M. B. N.; Assmann, Paulina; Spurzem, Rainer (IOP Publishing, 2015)
      Astrophysical research in recent decades has made significant progress thanks to the availability of various N-body simulation techniques. With the rapid development of high-performance computing technologies, modern ...
    • Characterizing HR 3549 B using SPHERE 
      Mesa, D.; Vigan, A.; D’Orazi, V.; Ginski, C.; Desidera, S.; Bonnefoy, M.; Gratton, R.; Langlois, M.; Marzari, F.; Messina, S.; Antichi, J.; Biller, B.; Bonavita, M.; Cascone, E.; Chauvin, G.; Claudi, R. U.; Curtis, I.; Fantinel, D.; Feldt, M.; Garufi, A.; Galicher, R.; Henning, Thomas; Incorvaia, S.; Lagrange, Anne Marie; Millward, M.; Perrot, C.; Salasnich, B.; Scuderi, S.; Sissa, E.; Wahhaj, Z.; Zurlo, A. (EDP Sciences, 2016)
      Aims. In this work, we characterize the low-mass companion of the AO field star HR 3549. Methods. We observed HR 3549B in imaging mode with the near-infrared branch (IFS and IRDIS) of SPHERE at the VLT, with IFS in YJ ...
    • Deep-HiTS: Rotation Invariant Convolutional Neural Network for Transient Detection 
      Cabrera Vives, Guillermo; Reyes, Ignacio; Förster, Francisco; Estévez Valencia, Pablo; Maureira, Juan Carlos (Institute of Physics, 2017)
      We introduce Deep-HiTS, a rotation invariant convolutional neuralnetwork (CNN) model for clas-sifying images of transients candidates into artifacts or real sources for the High cadence TransientSurvey (HiTS). CNNs have ...
    • Euclid: constraining dark energy coupled to electromagnetism using astrophysical and laboratory data 
      Martinelli, M.; Martins, C. J. A. P.; Nesseris, S.; Tutusaus, I.; Blanchard, A.; Camera, S.; Carbone, C.; Casas, S.; Pettorino, V.; Sakr, Z.; Yankelevich, V.; Sapone, Domenico; Amara, A.; Auricchio, N.; Bodendorf, C.; Bonino, D.; Branchini, E.; Capobianco, V.; Carretero, J.; Castellano, M.; Cavuoti, S.; Cimatti, A.; Cledassou, R.; Corcione, L.; Costille, A.; Degaudenzi, H.; Douspis, M.; Dubath, F.; Dusini, S.; Ealet, A.; Ferriol, S.; Frailis, M.; Franceschi, E.; Garilli, B.; Giocoli, C.; Grazian, A.; Grupp, F.; Haugan, S.V.H.; Holmes, W.; Hormuth, F.; Jahnke, K.; Kiessling, A.; Kümmel, M.; Kunz, M.; Kurki Suonio, H.; Ligori, S.; Lilje, P. B.; Lloro, I.; Mansutti, O.; Marggraf, O.; Markovic, K.; Massey, R.; Meneghetti, M.; Meylan, G.; Moscardini, L.; Niemi, S. M.; Padilla, C.; Paltani, S.; Pasian, F.; Pedersen, K.; Pires, S.; Poncet, M.; Popa, L.; Raison, F.; Rebolo, R.; Rhodes, J.; Roncarelli, M.; Rossetti, E.; Saglia, R.; Secroun, A.; Seidel, G.; Serrano, S.; Sirignano, C.; Sirri, G.; Starck, J. L.; Tavagnacco, D.; Taylor, A. N.; Tereno, I.; Toledo Moreo, R.; Valenziano, L.; Wang, Y.; Zamorani, G.; Zoubian, J.; Baldi, M.; Brescia, M.; Congedo, G.; Conversi, L.; Copin, Y.; Fabbian, G.; Farinelli, R.; Medinaceli, E.; Mei, S.; Polenta, G.; Romelli, E.; Vassallo, T. (EDP Sciences, 2021)
      In physically realistic, scalar-field-based dynamical dark energy models (including, e.g., quintessence), one naturally expects the scalar field to couple to the rest of the model's degrees of freedom. In particular, a ...
    • Euclid: Forecast constraints on the cosmic distance duality relation with complementary external probes 
      Martinelli, M.; Martins, C. J. A. P.; Nesseris, S.; Sapone, Domenico; Tutusaus, I.; Avgoustidis, A.; Camera, S.; Carbone, C.; Casas, S.; Ilic, S.; Sakr, Z.; Yankelevich, V.; Auricchio, N.; Balestra, A.; Bodendorf, C.; Bonino, D.; Branchini, E.; Brescia, M.; Brinchmann, J.; Capobianco, V.; Carretero, J.; Castellano, M.; Cavuoti, S.; Cledassou, R.; Congedo, G.; Conversi, L.; Corcione, L.; Dubath, F.; Ealet, A.; Frailis, M.; Franceschi, E.; Fumana, M.; Garilli, B.; Gillis, B.; Giocoli, C.; Grupp, F.; Haugan, S. V. H.; Holmes, W.; Hormuth, F.; Jahnke, K.; Kermiche, S.; Kilbinger, M.; Kitching, T.; Kubik, B.; Kunz, M.; Kurki-Suonio, H.; Ligori, S.; Lilje, P. B.; Lloro, I.; Marggraf, O.; Markovic, K.; Massey, R.; Mei, S.; Meneghetti, M.; Meylan, G.; Moscardini, L.; Niemi, S.; Padilla, C.; Paltani, S.; Pasian, F.; Pettorino, V.; Pires, S.; Polenta, G.; Poncet, M.; Popa, L.; Pozzetti, L.; Raison, F.; Rhodes, J.; Roncarelli, M.; Saglia, R.; Schneider, P.; Secroun, A.; Serrano, S.; Sirignano, C.; Sirri, G.; Sureau, F.; Taylor, A.; Tereno, I.; Toledo Moreo, R.; Valenziano, L.; Vassallo, T.; Wang, Y.; Welikala, N.; Weller, J.; Zacchei, A. (EDP Sciences S A, 2020)
      Context. In metric theories of gravity with photon number conservation, the luminosity and angular diameter distances are related via the Etherington relation, also known as the distance duality relation (DDR). A violation ...
    • Hint of curvature in the orbital motion of the exoplanet 51 Eridani b using 3 yr of VLT/SPHERE monitoring 
      Maire, A. L.; Rodet, L.; Cantalloube, F.; Galicher, R.; Brandner, W.; Messina, S.; Lazzoni, C.; Mesa, D.; Melnick, D.; Carson, J.; Samland, M.; Biller, B. A.; Boccaletti, A.; Wahhaj, Z.; Beust, H.; Bonnefoy, M.; Chauvin, G.; Desidera, S.; Langlois, M.; Henning, T.; Janson, M (EDP Sciences, 2019)
      Context. The 51 Eridani system harbors a complex architecture with its primary star forming a hierarchical system with the binary GJ 3305AB at a projected separation of 2000 au, a giant planet orbiting the primary star at ...
    • Medium-resolution spectrum of the exoplanet HIP 65426 b 
      Petrus, S.; Bonnefoy, Mickael; Chauvin, Gael; Charnay, B.; Marleau, G.D.; Gratton, R.; Lagrange, A.M.; Rameau, J.; Mordasini, C.; Nowak, M.; Delorme, P.; Boccaletti, A.; Carlotti, A.; Houllé, M.; Vigan, A.; Allard, F.; Desidera, S.; D’Orazi, V.; Hoeijmakers, H.J.; Wyttenbach, A.; Lavie, B. (EDP Sciences, 2021)
      Medium-resolution integral-field spectrographs (IFS) coupled with adaptive-optics such as Keck/OSIRIS, VLT/MUSE, or SINFONI are appearing as a new avenue for enhancing the detection and characterization capabilities of ...
    • Orbital and spectral characterization of the benchmark T-type brown dwarf HD19467B 
      Maire, A.-L.; Molaverdikhani, K.; Desidera, S.; Trifonov, T.; Mollière, P.; D’Orazi, V.; Frankel, N.; Baudino, J. L.; Messina, S.; Müller, A.; Charnay, B.; Cheetham, A. C.; Delorme, P.; Ligi, R.; Bonnefoy, M.; Brandner, W.; Mesa, D.; Cantalloube, F.; Galicher, R.; Henning, T.; Biller, B. A.; Hagelberg, J.; Lagrange, A. M.; Lavie, B.; Rickman, E.; Ségransan, D.; Udry, S.; Chauvin, Gaël; Gratton, R.; Langlois, M.; Vigan, A.; Meyer, M. R.; Beuzit, J. L.; Bhowmik, T.; Boccaletti, A.; Lazzoni, C.; Perrot, C.; Schmidt, T.; Zurlo, A.; Gluck, L.; Pragt, J.; Ramos, J.; Roelfsema, R.; Roux, A.; Sauvage, J. F. (EDP Science, 2020)
      Context. Detecting and characterizing substellar companions for which the luminosity, mass, and age can be determined independently is of utter importance to test and calibrate the evolutionary models due to uncertainties ...
    • PESSTO: survey description and products from the first data release by the Public ESO Spectroscopic Survey ... 
      Smartt, S. J.; Valenti, S.; Fraser, M.; Inserra, C.; Young, D. R.; Sullivan, M.; Pastorello, A.; Benetti, S.; Gal-Yam, A.; Knapic, C.; Molinaro, M.; Smareglia, R.; Smith, K.W.; Taubenberger, S.; Yaron, O.; Anderson, J. P.; Ashall, C.; Balland, C.; Baltay, C.; Barbarino, C.; Bauer, Franz Erik; Baumont, S.; Bersier, D.; Blagorodnova, N.; Bongard, S.; Botticella, M.-T.; Bufano, F.; Bulla, M.; Cappellaro, E.; Campbell, H.; Cellier Holzem, F.; Chen, T. W.; Childress, M. J.; Clocchiatti, A.; Contreras, C.; Dall’Ora, M.; Danziger, J.; De Jaeger, Thomas; De Cia, A.; Della Valle, M.; Dennefeld, M.; Elias Rosa, N.; Elman, N.; Feindt, U.; Fleury, M.; Gall, E.; González Gaitán, Santiago; Galbany, Lluis; Morales Garoffolo, A.; Greggio, L.; Guillou, L. L.; Hachinger, S.; Hadjiyska, E.; Hage, P. E.; Hillebrandt, W.; Hodgkin, S.; Hsiao, E. Y.; James, P. A.; Jerkstrand, A.; Kangas, T.; Kankare, E.; Kotak, R.; Kromer, M.; Kuncarayakti, H.; Leloudas, G.; Lundqvist, P.; Lyman, J. D.; Hook, I. M.; Maguire, K.; Manulis, I.; Margheim, S.; Mattila, S.; Maund, J. R.; Mazzali, P.; McCrum, M.; McKinnon, R.; Moreno Raya, M. E.; Nicholl, M.; Nugent, P. E.; Pain, R.; Pignata Libralato, Giuliano; Phillips, M. M.; Polshaw, J.; Pumo, M. L.; Rabinowitz, D.; Reilly, E.; Romero Cañizales, C.; Scalzo, R.; Schmidt, B.; Schulze, Steve; Sim, S. A.; Sollerman, J.; Taddia, F.; Tartaglia, L.; Terreran, G.; Tomasella, L.; Turatto, M.; Walker, E.; Walton, N. A.; Wyrzykowski, L.; Yuan, F.; Zampieri, L. (EDP Sciences, 2015)
      Context. The Public European Southern Observatory Spectroscopic Survey of Transient Objects (PESSTO) began as a public spectroscopic survey in April 2012. PESSTO classifies transients from publicly available sources and ...
    • Red Dots: A temperate 1.5 Earth-mass planet in a compact multi-terrestrial planet system around GJ 1061? 
      Dreizler, S.; Jeffers, S. V.; Rodríguez, E.; Zechmeister, M.; Barnes, J. R.; Haswell, C. A.; Coleman, G.; Lalitha, S.; Hidalgo Soto, D.; Strachan, J. B. P.; Hambsch, F.-J.; López González, M. J.; Morales, N.; Rodríguez López, C.; Berdiñas, Z. M.; Ribas, I.; Pallé, E.; Reiners, A.; Anglada Escudé, G. (Oxford University Press, 2020)
      Small low-mass stars are favourable targets for the detection of rocky habitable planets. In particular, planetary systems in the solar neighbourhood are interesting and suitable for precise characterization. The RedDots ...
    • Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020 
      Morgado, B. E.; Sicardy, B.; Braga Ribas, F.; Desmars, J.; Gomes Junior, A. R.; Berard, D.; Leiva Espinoza, Rodrigo Andrés; Ortiz, J. L.; Vieira Martins, R.; Benedetti Rossi, G.; Santos Sanz, P.; Camargo, J. I. B.; Duffard, R.; Rommel, F. L.; Assafin, M.; Boufleur, R. C.; Colas, F.; Kretlow, M.; Beisker, W.; Sfair, R.; Snodgrass, C.; Morales, N.; Fernández Valenzuela, E.; Amaral, L. S.; Amarante, A.; Artola, R. A.; Backes, M.; Bath, K. L.; Bouley, S.; Buie, M. W.; Cacella, P.; Colazo, C. A.; Colque, J. P.; Dauvergne, J. L.; Dominik, M.; Emilio, M.; Erickson, C.; Evans, R.; Fabrega Polleri, J.; Garcia Lambas, D.; Giacchini, B. L.; Hanna, W.; Herald, D.; Hesler, G.; Hinse, T. C.; Jacques, C.; Jehin, E.; Jorgensen, U. G.; Machado, D. I.; Maquet, L.; Maury, A.; Melia, R.; Meza, E.; Mondon, B.; Moura, T.; Newman, J.; Payet, T.; Pereira, C. L.; Pollock, J.; Poltronieri, R. C.; Quispe Huaynasi, F.; Reichart, D.; de Santana, T.; Schneiter, E. M.; Sieyra, M. V.; Skottfelt, J.; Soulier, J. F.; Starck, M.; Thierry, P.; Torres, P. J.; Trabuco, L. L.; Unda Sanzana, E.; Yamashita, T. A. R.; Winter, O. C.; Zapata, A.; Zuluaga, C. A. (EDP Sciences, 2021)
      Context. The Centaur (10199) Chariklo has the first ring system discovered around a small object. It was first observed using stellar occultation in 2013. Stellar occultations allow sizes and shapes to be determined with ...
    • RefPlanets: Search for reflected light from extrasolar planets with SPHERE/ZIMPOL 
      Hunziker, S.; Schmid, H. M.; Mouillet, D.; Milli, J.; Zurlo, Alice; Abe, L.; Avenhaus, H.; Baruffolo, A.; Bazzon, A.; Boccaletti, A.; Baudoz, P.; Beuzit, J. L.; Carbillet, M.; Chauvin, G.; Dohlen, K.; Chauvin, G.; Claudi, R.; Costille, A.; Daban, J.-B.; Desidera, S.; Dohlen, K.; Dominik, C.; Downing, M.; Engler, N.; Feldt, M.; Fusco, T.; Ginski, C.; Gisler, D.; Girard, J. H.; Gratton, R.; Henning, Th.; Hubin, N.; Kasper, M.; Keller, C. U.; Langlois, M.; Lagadec, E.; Martínez, P.; Maire, A.-L.; Menard, F.; Meyer, M. R.; Pavlov, A.; Pragt, J.; Puget, P.; Quanz, S. P.; Rickman, E.; Roelfsema, R.; Salasnich, B.; Sauvage, J.-F.; Siebenmorgen, R.; Sissa, E.; Snik, F.; Suárez, M.; Szulágyi, J.; Thalmann, Ch.; Turatto, M.; Udry, S.; Van Holstein, R. G.; Vigan, A.; Wildi, F. (EDP ​​Sciences, 2020)
      Aims. RefPlanets is a guaranteed time observation programme that uses the Zurich IMaging POLarimeter (ZIMPOL) of Spectro-Polarimetric High-contrast Exoplanet REsearch instrument at the Very Large Telescope to perform a ...
    • Shapley Supercluster Survey: construction of the photometric catalogues and i-band data release 
      Mercurio, A.; Merluzzi, P.; Busarello, G.; Grado, A.; Limatola, L.; Haines, Chris; Brescia, M.; Cavuoti, S.; Dopita, M.; Dall’Ora, M.; Capaccioli, M.; Napolitano, N.; Pimbblet, K. A. (Oxford University Press, 2015)
      The Shapley Supercluster Survey is a multi-wavelength survey covering an area of similar to 23 deg(2) (similar to 260 Mpc(2) at z = 0.048) around the supercluster core, including nine Abell and two poor clusters, having ...
    • SN 2014J at M82 – I. A middle-class Type Ia supernova by all spectroscopic metrics 
      Galbany, Lluis; Moreno Raya, M.; Ruiz Lapuente, P.; González Hernández, J.; Méndez, J.; Vallely, P.; Baron, E.; Domínguez, I.; Hamuy Wackenhut, Mario; López Sánchez, Ángel R.; Mollá, M.; Catalán, S.; Cooke, E.; Fariña, C.; Génova Santos, R.; Karjalainen, R.; Lietzen, H.; McCormac, J.; Riddick, F.; Rubiño Martín, J.; Skillen, I.; Tudor, V.; Vaduvescu, O. (Oxford University Press, 2016)
      We present the intensive spectroscopic follow up of the Type Ia supernova (SN Ia) 2014J in the starburst galaxy M82. Twenty-seven optical spectra have been acquired from 2014 January 22 to September 1 with the Isaac ...
    • Starspot Distributions on Fully Convective M DWARFS: Implications for Radial Velocity Planet Searches 
      Barnes, J.; Jeffers, S.; Jones, H.; Pavlenko, Ya; Jenkins, James Stewart; Haswell, C.; Lohr, M. (IOP, 2015)
      Since M4.5–M9 dwarfs exhibit equatorial rotation velocities of the order of 10 km s−1 on average, radial velocity surveys targeting this stellar population will likely need to find methods to effectively remove starspot ...
    • Testing giant planet formation in the transitional disk of SAO 206462 using deep VLT/SPHERE imaging 
      Maire, A. -L.; Stolker, T.; Messina, S.; Müller, A.; Biller, B. A.; Currie, T.; Dominik, C.; Grady, C. A.; Boccaletti, A.; Bonnefoy, M.; Chauvin, G.; Galicher, R.; Millward, M.; Pohl, A.; Brandner, W.; Henning, Thomas; Lagrange, Anne Marie; Langlois, M.; Meyer, M. R.; Quanz, S. P.; Vigan, A.; Zurlo, Alice; van Boekel, R.; Buenzli, E.; Buey, T.; Desidera, S.; Feldt, M.; Fusco, T.; Ginski, C.; Giro, E.; Gratton, R.; Hubin, N.; Lannier, J.; Le Mignant, D.; Mesa, D.; Peretti, S.; Perrot, C.; Ramos, J. R.; Salter, G.; Samland, M.; Sissa, E.; Stadler, E.; Thalmann, C.; Udry, S.; Weber, L. (EDP Sciences, 2017-05)
      Context. The SAO 206462 (HD 135344B) disk is one of the few known transitional disks showing asymmetric features in scattered light and thermal emission. Near-infrared scattered-light images revealed two bright outer ...
    • The data reduction pipeline for the SDSS-IV manga IFU galaxy survey 
      Law, David; Cherinka, Brian; Yan, Renbin; Andrews, Brett; Bershady, Matthew; Bizyaev, Dmitry; Blanc Mendiberri, Guillermo; Blanton, Michael; Bolton, Adam; Brownstein, Joel; Bundy, Kevin; Chen, Yanmei; Drory, Niv; D Souza, Richard; Fu, Hai; Jones, Amy; Kauffmann, Guinevere; MacDonald, Nicholas; Masters, Karen; Newman, Jeffrey; Parejko, John; Sánchez-Gallego, José; Sánchez, Sebastian; Schlegel, David; Thomas, Daniel; Wake, David; Weijmans, Anne-Marie; Westfall, Kyle; Zhang, Kai (The American Astronomical Society, 2016)
      Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is an optical fiber-bundle integral-field unit (IFU) spectroscopic survey that is one of three core programs in the fourth-generation Sloan Digital Sky ...
    • The effect of phased recurrent units in the classification of multiple catalogues of astronomical light curves 
      Donoso Oliva, C.; Cabrera Vives, G.; Protopapas, P.; Carrasco, Davis; Estévez, P. A. (Oxford, 2021)
      In the new era of very large telescopes, where data is crucial to expand scientific knowledge, we have witnessed many deep learning applications for the automatic classification of lightcurves. Recurrent neural networks ...
    • The herschel SPIRE fourier transform spectrometer spectral feature Finder I. The spectral feature finder ... 
      Hopwood, R.; Valtchanov, I.; Spencer, L. D.; Scott, J.; Benson, C.; Marchili, N.; Hladczuk, N.; Polehampton, E. T.; Lu, N.; Makiwa, G.; Naylor, D. A.; Gom, B. G.; Noble, Grace; Griffin, M. J. (Oxford University Press, 2020)
      We provide a detailed description of the Herschel/SPIRE Fourier Transform Spectrometer (FTS) Spectral Feature Finder (FF). The FF is an automated process designed to extract significant spectral features from SPIRE FTS ...