A5009947801- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Pulsars and Gravitational Waves Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Neutrino Physics Research
- Galaxies: Formation, Evolution, Phenomena
- Particle Detector Development and Performance
- Calibration and Measurement Techniques
- Dark Matter and Cosmic Phenomena
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Mechanics and Biomechanics Studies
- Soil Moisture and Remote Sensing
- Solar and Space Plasma Dynamics
- GNSS positioning and interference
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Adaptive optics and wavefront sensing
Universidad de Jaén
2007-2016
Esan University
2009-2010
Jambi University
2009
Institut Català de Ciències del Clima
2008
Universitat de Barcelona
2008
National Centre for Radio Astrophysics
2008
Universitat de Girona
2008
Max Planck Institute for Nuclear Physics
2008
<i>Context. <i/>MGRO J2019+37 is an unidentified extended source of very high energy gamma-rays originally reported by the Milagro Collaboration as brightest TeV in Cygnus region. Its emission could be powered either a single or several sources. The GeV pulsar AGL J2020.5+3653, discovered AGILE and associated with PSR J2021+3651, contribute to from MGRO J2019+37.<i>Aims. <i/>Our aim identify radio near-infrared sources field J2019+37, study potential counterparts explain its...
Aims. We report the first detailed X-ray study of supernova remnant (SNR) G304.6+0.1, achieved with XMM-Newton mission. Methods. The powerful imaging capability was used to characteristics at different energy ranges. morphology and spectral properties were analyzed. In addittion, radio mid-infrared data obtained Molonglo Observatory Synthesis Telescope Spitzer Space association detected emission understand structure SNR differents wavelengths. Results. shows an extended arc-like internal in...
Aims. We report results of an X-ray study the supernova remnant (SNR) G344.7-0.1 and point-like source located at geometrical center SNR radio structure. Methods. The morphology spectral properties central were studied using data from XMM-Newton Chandra satellites. Archival infrared Spitzer observations 8 24 $\mu$m used to compare its multi-band different wavelengths. Results. reveal that overall emission is extended correlates very well with regions bright emission. spectrum dominated by...
We present a new study of the microquasar system GRS 1758−258 in near-infrared domain based on archival observations with Hubble Space Telescope and NICMOS camera. In addition to confirming counterpart pointed out by Muñoz-Arjonilla et al., we show that this object displays significant photometric variability. From its average magnitudes, also find fits well within correlation between optical/near-infrared X-ray luminosity known exist for low-mass, black-hole candidate binaries hard state....
Context. GRS 1758-258 is one of two prototypical microquasars towards the Galactic Center direction discovered almost a quarter century ago. The system remains poorly studied in optical domain due to its counterpart being very faint and absorbed target crowded region sky. Aims. Our aim investigate order shed light on nature stellar binary components. In particular, main physical parameters donor star, such as mass or spectral type, are not yet well constrained. Methods. has remained so far...
We present the results of an observational photo-polarimetry campaign blazar PG 1553+113 at optical wavelengths. The was recently detected very high energies (> 100 GeV) by H.E.S.S and MAGIC gamma-ray Cherenkov telescopes. Our high-temporal resolution data show significant variations in linear polarization percentage position angle inter-night time-scales, while shorter (intra-night) time-scales both parameters varied less significantly, if all. Changes seem to be common emitting blazars....
Aims. We aim at investigating the time-behaviour of a sample gamma-ray blazars. present results from 13 month-long optical photometry monitoring campaign blazars PKS 0048−097, 0754+100, [HB89] 0827+243, 0851+202, 1253−055, 1510−089, 1749+096, 2230+114 and 2251+158.
Aims.We search for ultra luminous X-ray source (ULXs) radio counterparts located in nearby galaxies order to constrain their physical nature.
Aims.We revisit the vicinity of microquasar Cygnus X-3 at radio wavelengths. We aim to improve our previous search for possible associated extended features/hot spots in position angle relativistic jets focusing on shorter angular scales than previously explored.
Context. After the release of gamma-ray source catalog produced by Fermi satellite during its first two years operation, a significant fraction sources still remain unassociated at lower energies. In addition to well-known high-energy emitters (pulsars, blazars, supernova remnants, etc.) theoretical expectations predict new classes sources. particular, emission could be associated with some early phases stellar evolution, but this interesting possibility is poorly understood. Aims. The aim...
Context: The recent detection of very high-energy (VHE) gamma-ray emission from the direction W43 star-forming region prompted us to investigate its stellar population in detail an attempt see wether or not it is possible association. Aims: We search for counterpart(s) source any hints them, such as non-thermal synchrotron a tracer relativistic particles often involved plausible physical scenarios VHE emission. Methods: data-mined several archival databases with different degrees success....
We present the results of a revised search for near-infrared counterpart to microquasar 1E 1740.7−2942, which has eluded identification despite many years elapsed since its discovery. By taking into account new astrometric information, we have been successful identify single source, with apparent non-stellar morphology, whose position agrees well that X-ray and radio-emitting core at subarcsecond level. The possible implications this finding respect nature 1740.7−2942 are discussed.
Context. Understood to be a microquasar in the Galactic center region, GRS 1758-258 has not yet been unambiguously identified have an optical/near-infrared counterpart, mainly because of high absorption and historic lack suitable astrometric stars, which led use secondary solutions. Although it is considered with 1E 1740.7-2942 as prototypical origin both sources confirmed. Aims. We attempt improve previous astrometry identify candidate counterpart 1758-258. present observations Gran...
<i>Context. <i/>A short duration burst reminiscent of a soft gamma-ray repeater/anomalous X-ray pulsar behaviour was detected in the direction LS I +61 303 by <i>Swift<i/> satellite. While association with this well known binary is likely, different origin cannot be excluded.<i>Aims. <i/>We explore error box unexpected flaring event and establish radio, near-infrared sources our search for any peculiar alternative counterpart.<i>Methods. carried out combined analysis archive Very Large Array...
Aims.To investigate the possible hot spot nature of two previously detected radio sources in vicinity Cygnus X-3 microquasar.
Context. A considerable fraction of the γ-ray sources discovered with Energetic Gamma-Ray Experiment Telescope (EGRET) remain unidentified. The EGRET that have been properly identified are either pulsars or variable at both radio and gamma-ray wavelengths. Most strong blazars. However, some low galactic-latitude sources, highly emission, lack any evident counterpart according to data available until now.
<i>Aims. <i/>We aim to contribute the identification of counterpart for one bright sources gamma-rays in catalogue obtained and released by Fermi collaboration.<i>Methods. <i/>Our work is based on a extensive from different wavelength catalogues databases.<i>Results. <i/>As first result, we report finding few candidates inside 95% confidence error box LAT unidentified gamma-ray source 0FGL J1848.6-0138. The globular cluster GLIMPSE-C01 remarkably distinctive being among most peculiar objects...
Aims.We aim to investigate the nature of high energy source KS 1741-293 by revisiting radio and infrared associations proposed in early 1990s.
Context. Astrophysical jets are ubiquitous in the Universe on all scales, but their large-scale dynamics and evolution time hard to observe since they usually develop at a very slow pace. Aims. We aim obtain first observational proof of expected interaction with environment an astrophysical jet. Only from microquasars offer chance witness real-time, full-jet within human lifetime, combine 'short', few parsec length relativistic velocities. Methods. The methodology this work is based...