Información del autor
Autor Contreras González, José Luis |
Documentos disponibles escritos por este autor (187)
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Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Satalecka, Konstanzja ; Scapin, Valeria | IOP Publishing | 2014-05-10The discovery of rapidly variable Very High Energy ( VHE; E > 100 GeV). - ray emission from 4C + 21.35 ( PKS 1222+ 216) by MAGIC on 2010 June 17, triggered by the high activity detected by the Fermi Large Area Telescope ( LAT) in high energy ( [...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Satalecka, Konstanzja ; Scapin, Valeria | EDP Sciencies | 2015-01Context: Blazars are variable sources on various timescales over a broad energy range spanning from radio to very high energy (> 100 GeV, hereafter VHE).Mrk 501 is one of the brightest blazars at TeV energies and has been extensively studied si[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Nievas Rosillo, Mireia ; Satalecka, Konstanzja ; Scapin, Valeria ; otros, ... | Wiley | 2016-07-01The BL Lac object 1ES 1011+496 was discovered at Very High Energy (VHE, E> 100GeV) ?-rays by MAGIC in spring 2007. Before that the source was little studied in different wavelengths. Therefore a multi-wavelength (MWL) campaign was organized in s[...]texto impreso
Barrio Uña, Juan Abel ; Bonnefoy, Simon Francois Albert ; Contreras González, José Luis ; Domínguez-Adame Acosta, Francisco ; Fidalgo, David Friedrich Carreto ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Nievas Rosillo, Mireia | EDP Sciencies | 2017-07Context. PKS 1510 089 is one of only a few flat spectrum radio quasars detected in the VHE (very-high-energy, > 100 GeV) gamma-ray band. Aims. We study the broadband spectral and temporal properties of the PKS 1510 089 emission during a high ga[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; Miranda Pantoja, José Miguel ; Nieto, Daniel | IOP Publishing | 2008-09-10We present the results of the first multiwavelength observing campaign on the high-mass X-ray binary LS I + 61 303, comprising observations at the TeV regime with the MAGIC telescope, along with X-ray observations with Chandra, and radio interfe[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Bonnefoy, Simon Francois Albert ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Nievas Rosillo, Mireia ; Satalecka, Konstanzja ; Scapin, Valeria ; otros, ... | American Astronomical Society | 2016-03-10We present coordinated multiwavelength observations of the bright, nearby BL Lacertae object Mrk 421 taken in 2013 January–March, involving GASP-WEBT, Swift, NuSTAR, Fermi-LAT, MAGIC, VERITAS, and other collaborations and instruments, providing [...]texto impreso
Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fidalgo, David Friedrich Carreto ; Fonseca González, Mª Victoria ; Hoang, Kim Dinh ; López Moya, Marcos ; Morcuende, D. ; Peñil del Campo, Pablo ; Saha, Lab ; otros, ... | University Chicago Press | 2020-03Extreme high-frequency-peaked BL Lac objects (EHBLs) are blazars that exhibit extremely energetic synchrotron emission. They also feature nonthermal gamma-ray emission whose peak lies in the very high-energy (VHE, E > 100 GeV) range, and in som[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel | IOP Publishing | 2006-02-20Recently, the Galactic center has been reported to be a source of very high energy (VHE) gamma-rays by the CANGAROO, VERITAS, and HESS experiments. The energy spectra as measured by these experiments show substantial differences. In this Letter [...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; Miranda Pantoja, José Miguel ; Nieto, Daniel | Amer Assoc Advancement Science | 2008-11-21One fundamental question about pulsars concerns the mechanism of their pulsed electromagnetic emission. Measuring the high- end region of a pulsar's spectrum would shed light on this question. By developing a new electronic trigger, we lowered t[...]texto impreso
Barrio Uña, Juan Abel ; Bonnefoy, Simon ; Contreras González, José Luis ; Domínguez Díaz, Alberto ; Fidalgo, David Friedrich Carreto ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Nievas Rosillo, Mireia ; Ahnen, L.M. ; Ansoldi, S. ; otros, ... | Oxford University Press. | 2017-10Spontaneous breaking of Lorentz symmetry at energies on the order of the Planck energy or lower is predicted by many quantum gravity theories, implying non-trivial dispersion relations for the photon in vacuum. Consequently, gamma-rays of differ[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel | IOP Publishing | 2006-03-10The MAGIC Cerenkov telescope has observed very high energy (VHE) gamma-ray emission from the active galactic nucleus 1ES 1959+650 during 6 hr in 2004 September and October. The observations were carried out alternating with observations of the C[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel | IOP Publishing | 2007-06-20The MAGIC collaboration has observed very high energy gamma-ray emission from the AGN 1ES 2344+514. A gamma-ray signal corresponding to an 11 sigma excess and an integral flux of ( 2.38 +/- 0.30(stat) +/- 0.70(syst)) x 10(-11) cm(-2) s(-1) above[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel | IOP Publishing | 2006-05-20Recently, the HESS array has reported the detection of gamma-ray emission above a few hundred GeV from eight new sources located close to the Galactic plane. The source HESS J1834 - 087 is spatially coincident with the supernova remnant G23.3 - [...]texto impreso
Antoranz Canales, Pedro ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel | EDP Sciencies | 2007-11Aims. We searched for very high energy (VHE)gamma-ray emission from the supernova remnant Cassiopeia A. Methods. The shell-type supernova remnant Cassiopeia A was observed with the 17 m MAGIC telescope between July 2006 and January 2007 for a to[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel | IOP Publishing | 2007-07-01The MAGIC telescope took data of very high energy gamma-ray emission from the blazar Markarian 421 ( Mrk 421) between 2004 November and 2005 April. We present a combined analysis of data samples recorded under different observational conditions,[...]texto impreso
Barrio Uña, Juan Abel ; Bonnefoy, S. ; Contreras González, José Luis ; Domínguez Díaz, Alberto ; Fonseca González, Mª Victoria ; Galindo, D. ; López, M. ; Nievas Rosillo, Mireia ; otros, ... | EDP Sciencies | 2017-05Context. We present the results of a multi-year monitoring campaign of the Galactic center (GC) with the MAGIC telescopes. These observations were primarily motivated by reports that a putative gas cloud (G2) would be passing in close proximity [...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Nieto, Daniel | IOP Publishing | 2011-01-10We report new observations of the intermediate-frequency peaked BL Lacertae object 3C 66A with the MAGIC telescopes. The data sample we use were taken in 2009 December and 2010 January, and comprises 2.3 hr of good quality data in stereoscopic m[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Satalecka, Konstanzja ; Scapin, Valeria | IOP Publishing | 2011-11-20We report on the observation of gamma-rays above 25 GeV from the Crab pulsar (PSR B0532+ 21) using the MAGIC I telescope. Two data sets from observations during the winter period 2007/2008 and 2008/2009 are used. In order to discuss the spectral[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Nieto, Daniel ; Satalecka, Konstanzja ; Scapin, Valeria | EDP Sciencies | 2013-01Context. Magnetars are an extreme, highly magnetized class of isolated neutron stars whose large X-ray luminosity is believed to be driven by their high magnetic field. Aims. We study for the first time the possible very high energy gamma-ray em[...]texto impreso
Hassan, Tarek ; Rosado Vélez, Jaime ; Contreras González, José Luis | American Institut of Physics | 2017In gamma-ray astronomy, a variety of data formats and proprietary software have been traditionally used, often developed for one specific mission or experiment. Especially for ground-based imaging atmospheric Cherenkov telescopes (IACTs), data a[...]texto impreso
Acciari, V. A. ; Bernardos, M. I. ; Colombo, E. ; Contreras González, José Luis ; Cortina, J. ; Delgado, C. ; Díaz, C. ; Fink, D. ; Mariotti, M. ; Mangano, S. ; Mirzoyan, R. ; Polo, M. ; Schweizer, T. ; Will, M. | Wiley | 2020-01Imaging Atmospheric Cherenkov Telescopes (IACTs) currently in operation feature large mirrors and order of 1 ns time response to signals of a few photo-electrons produced by optical photons. This means that they are ideally suited for optical in[...]texto impreso
Antoranz Canales, Pedro ; Bonnefoy, Simon Francois Albert ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Satalecka, Konstanzja ; Scapin, Valeria | IOP publishing ltd | 2014-02We present the results of stereoscopic observations of the satellite galaxy Segue 1 with the MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours of good-quality data, this is the deepest observational campaign on any dwarf[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Nieto, Daniel ; Satalecka, Konstanzja ; Scapin, Valeria | Elsevier Science BV | 2012-02MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes located in the Canary island of La Palma. Since autumn 2009 both telescopes have been working together in stereoscopic mode, providing a significant improvement with respect to th[...]texto impreso
Barrio Uña, Juan Abel ; Contreras González, José Luis ; Domínguez-Adame Acosta, Francisco ; Fonseca González, Mª Victoria ; Fidalgo, David Friedrich Carreto ; López Moya, Marcos ; Nievas Rosillo, Mireia | Elsevier Science BV | 2017-09MAGIC, a system of two imaging atmospheric Cherenkov telescopes, achieves its best performance under dark conditions, i.e. in absence of moonlight or twilight. Since operating the telescopes only during dark time would severely limit the duty cy[...]texto impreso
Barrio Uña, Juan Abel ; Contreras González, José Luis ; Domínguez Díaz, Alberto ; Carreto Fidalgo, David Friedrich ; Fonseca González, Victoria ; Hoang, Kim Dinh ; López Moya, Marcos ; Nievas Rosillo, Mireia ; Peñil del Campo, Pablo ; Saha, Lab | IOP publishing ltd | 2018-11-01We report on observations of the pulsar/Be star binary system PSR J2032+4127/MT91 213 in the energy range between 100 GeV and 20 TeV with the Very Energetic Radiation Imaging Telescope Array and Major Atmospheric Gamma Imaging Cherenkov telescop[...]