Institution
IFAE
Other•Barcelona, Spain•
About: IFAE is a other organization based out in Barcelona, Spain. It is known for research contribution in the topics: Large Hadron Collider & Galaxy. The organization has 664 authors who have published 1270 publications receiving 51097 citations. The organization is also known as: Instituto de Fisica de Altas Energias & IFAE.
Topics: Large Hadron Collider, Galaxy, Higgs boson, Redshift, MAGIC (telescope)
Papers published on a yearly basis
Papers
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University of California, Berkeley1, University of Granada2, University of Lisbon3, University of Chicago4, Cornell University5, University of Chile6, Texas A&M University7, University of Queensland8, University of Southampton9, Cardiff University10, University of Sydney11, Duke University12, University of Pennsylvania13, University of California, Santa Cruz14, Swinburne University of Technology15, University of Portsmouth16, Australian National University17, University of São Paulo18, Fermilab19, Autonomous University of Madrid20, Pierre-and-Marie-Curie University21, Institut d'Astrophysique de Paris22, University of Sussex23, University College London24, Stanford University25, University of Illinois at Urbana–Champaign26, IFAE27, Spanish National Research Council28, Indian Institute of Technology, Hyderabad29, ETH Zurich30, Ohio State University31, Harvard University32, Macquarie University33, Lowell Observatory34, Carnegie Institution for Science35, Princeton University36, University of Michigan37, Brandeis University38, Oak Ridge National Laboratory39, Max Planck Society40, Ludwig Maximilian University of Munich41
TL;DR: In this article, the utility of Type II supernovae (SNe II) for deriving accurate extragalactic distances was demonstrated for the next generation of telescopes where more distant SNe II will be discovered.
Abstract: Despite vast improvements in the measurement of the cosmological parameters, the nature of dark energy and an accurate value of the Hubble constant (H0) in the Hubble–Lemaitre law remain unknown. To break the current impasse, it is necessary to develop as many independent techniques as possible, such as the use of Type II supernovae (SNe II). The goal of this paper is to demonstrate the utility of SNe II for deriving accurate extragalactic distances, which will be an asset for the next generation of telescopes where more-distant SNe II will be discovered. More specifically, we present a sample from the Dark Energy Survey Supernova Program (DES-SN) consisting of 15 SNe II with photometric and spectroscopic information spanning a redshift range up to 0.35. Combining our DES SNe with publicly available samples, and using the standard candle method (SCM), we construct the largest available Hubble diagram with SNe II in the Hubble flow (70 SNe II) and find an observed dispersion of 0.27 mag. We demonstrate that adding a colour term to the SN II standardization does not reduce the scatter in the Hubble diagram. Although SNe II are viable as distance indicators, this work points out important issues for improving their utility as independent extragalactic beacons: find new correlations, define a more standard subclass of SNe II, construct new SN II templates, and dedicate more observing time to high-redshift SNe II. Finally, for the first time, we perform simulations to estimate the redshift-dependent distance-modulus bias due to selection effects.
20 citations
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University of Wisconsin-Madison1, Brandeis University2, Fermilab3, University of Chicago4, Autonomous University of Madrid5, University of Pennsylvania6, University of Nottingham7, Texas A&M University8, University of Queensland9, University of São Paulo10, University of California, Santa Cruz11, Stanford University12, University of Illinois at Urbana–Champaign13, Australian National University14, University of North Carolina at Chapel Hill15, European Southern Observatory16, University College London17, University of Cambridge18, Pontifical Catholic University of Chile19, Tel Aviv University20, Andrés Bello National University21, Duke University22, University of Southampton23, State University of Campinas24, Benedictine University25, Spanish National Research Council26, Institut d'Astrophysique de Paris27, Pierre-and-Marie-Curie University28, University of Sussex29, IFAE30, University of Trieste31, Indian Institute of Technology, Hyderabad32, University of Michigan33, University of Geneva34, ETH Zurich35, Ohio State University36, Harvard University37, Lowell Observatory38, Macquarie University39, Princeton University40, Oak Ridge National Laboratory41
TL;DR: In this paper, the Dark Energy Survey (DES) Gravitational wave Search and Discovery Team performed the most thorough and accurate analysis to date, targeting the entire 90 percent confidence level localization area with Blanco/DECam 0, 1, 2, 3, 6, and 16 nights after the merger was detected.
Abstract: On 14 August 2019, the LIGO and Virgo Collaborations alerted the astronomical community of a high significance detection of gravitational waves and classified the source as a neutron star - black hole (NSBH) merger, the first event of its kind. In search of an optical counterpart, the Dark Energy Survey (DES) Gravitational Wave Search and Discovery Team performed the most thorough and accurate analysis to date, targeting the entire 90 percent confidence level localization area with Blanco/DECam 0, 1, 2, 3, 6, and 16 nights after the merger was detected. Objects with varying brightness were detected by the DES Search and Discovery Pipeline and we systematically reduced the list of candidate counterparts through catalog matching, light curve properties, host-galaxy photometric redshifts, SOAR spectroscopic follow-up observations, and machine-learning-based photometric classification. All candidates were rejected as counterparts to the merger. To quantify the sensitivity of our search, we applied our selection criteria to simulations of supernovae and kilonovae as they would appear in the DECam observations. Since there are no explicit light curve models for NSBH mergers, we characterize our sensitivity with binary NS models that are expected to have similar optical signatures as NSBH mergers. We find that if a kilonova occurred during this merger, configurations where the ejected matter is greater than 0.07 solar masses, has lanthanide abundance less than $10^{-8.56}$, and has a velocity between $0.18c$ and $0.21c$ are disfavored at the $2\sigma$ level. Furthermore, we estimate that our background reduction methods are capable of associating gravitational wave signals with a detected electromagnetic counterpart at the $4\sigma$ level in $95\%$ of future follow-up observations.
20 citations
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TL;DR: This publication presents a 4.2-cm2 large HVCMOS pixel sensor implemented in a commercial 180-nm process on a lowly doped substrate and its characterization.
Abstract: The high-voltage CMOS (HVCMOS) sensors are a novel type of CMOS active pixel sensors for ionizing particles that can be implemented in CMOS processes with deep n-well option. The pixel contains one sensor electrode formed with a deep n-well implanted in a p-type substrate. CMOS pixel electronics, embedded in shallow wells, are placed inside the deep n-well. By biasing the substrate with a high negative voltage and by the use of a lowly doped substrate, a depleted region depth of at least 30 $\mu \text{m}$ can be achieved. The electrons generated by a particle are collected by drift, which induces fast detectable signals. This publication presents a 4.2-cm2 large HVCMOS pixel sensor implemented in a commercial 180-nm process on a lowly doped substrate and its characterization.
20 citations
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TL;DR: In this paper, a search for air showers induced by tau leptons arising from interactions of tau neutrinos in the Earth crust or the surrounding ocean has been presented.
20 citations
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TL;DR: In this paper, the authors used the results of the MAGIC telescope observation of the moderate resdhift of a gamma-ray burst at energies above about 80GeV to evaluate the perspective for late-afterglow observations with ground-based GeV/TeV telescopes.
Abstract: Context: Gamma-ray bursts are cosmological sources emitting radiation from the gamma-rays to the radio band. Substantial observational efforts have been devoted to the study of gamma-ray bursts during the prompt phase, i.e. the initial burst of high-energy radiation, and during the long-lasting afterglows. In spite of many successes in interpreting these phenomena, there are still several open key questions about the fundamental emission processes, their energetics and the environment. Aim: Independently of specific gamma-ray burst theoretical recipes, spectra in the GeV/TeV range are predicted to be remarkably simple, being satisfactorily modeled with power-laws, and therefore offer a very valuable tool to probe the extragalactic background light distribution. Furthermore, the simple detection of a component at very-high energies, i.e. at $\sim 100$\,GeV, would solve the ambiguity about the importance of various possible emission processes, which provide barely distinguishable scenarios at lower energies. Methods: We used the results of the MAGIC telescope observation of the moderate resdhift ($z\sim0.76$) \object{GRB\,080430} at energies above about 80\,GeV, to evaluate the perspective for late-afterglow observations with ground based GeV/TeV telescopes. Results: We obtained an upper limit of $F_{\rm 95%\,CL} = 5.5 \times 10^{-11}$\,erg\,cm$^{-2}$\,s$^{-1}$ for the very-high energy emission of \object{GRB\,080430}, which cannot set further constraints on the theoretical scenarios proposed for this object also due to the difficulties in modeling the low-energy afterglow. Nonetheless, our observations show that Cherenkov telescopes have already reached the required sensitivity to detect the GeV/TeV emission of GRBs at moderate redshift ($z \lesssim 0.8$), provided the observations are carried out at early times, close to the onset of their afterglow phase.
20 citations
Authors
Showing all 672 results
Name | H-index | Papers | Citations |
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J. S. Lange | 160 | 2083 | 145919 |
Diego F. Torres | 137 | 948 | 72180 |
M. I. Martínez | 134 | 1251 | 79885 |
Jose Flix | 133 | 1257 | 90626 |
Matteo Cavalli-Sforza | 129 | 1273 | 89442 |
Ilya Korolkov | 128 | 884 | 75312 |
Martine Bosman | 128 | 942 | 73848 |
Maria Pilar Casado | 128 | 981 | 78550 |
Clement Helsens | 128 | 870 | 74899 |
Imma Riu | 128 | 954 | 73842 |
Sebastian Grinstein | 128 | 1222 | 79158 |
Remi Zaidan | 126 | 744 | 71647 |
Arely Cortes-Gonzalez | 124 | 774 | 68755 |
Trisha Farooque | 124 | 841 | 69620 |
Martin Tripiana | 124 | 716 | 69652 |