A. J. Castro‐Tirado
A5076828349- Gamma-ray bursts and supernovae
- SAS software applications and methods
- Astro and Planetary Science
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Planetary Science and Exploration
- Particle Detector Development and Performance
- Adaptive optics and wavefront sensing
- CCD and CMOS Imaging Sensors
- Solar and Space Plasma Dynamics
- Spectroscopy and Chemometric Analyses
- Geophysics and Gravity Measurements
- Isotope Analysis in Ecology
- Nuclear Physics and Applications
- Radio Astronomy Observations and Technology
- Atmospheric Ozone and Climate
- Mechanics and Biomechanics Studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Geology and Paleoclimatology Research
- Calibration and Measurement Techniques
Instituto de Astrofísica de Andalucía
2016-2025
Universidad de Málaga
2016-2025
Consejo Superior de Investigaciones Científicas
2009-2024
University of the Free State
2024
Turku Centre for Computer Science
2023
University of Turku
2023
Max Planck Institute for Radio Astronomy
2023
University of Würzburg
2023
National Institute for Astrophysics
2016-2020
University of Ferrara
2020
The JEM–X monitor provides X-ray spectra and imaging with arcminute angular resolution in the 3 to 35 keV band. good low energy response of plays an important role identification gamma ray sources analysis scientific interpretation combined data. is a coded aperture instrument consisting two identical, coaligned telescopes. Each detectors has sensitive area 500 cm2, views sky through its own mask. masks are inverted respect each other 3' across effective field view about 10° diameter.
Variable X-ray and gamma-ray emission is characteristic of the most extreme physical processes in Universe, studying sources these energetic photons has been a major driver astronomy for past 50 years. Here we present multiwavelength observations unique selected transient, discovered by Swift, which was accompanied bright across electromagnetic spectrum, whose properties are unlike any previously observed source. We pinpoint event to center small, star-forming galaxy at redshift z=0.3534....
We have gathered optical photometry data from the literature on a large sample of Swift-era gamma-ray burst (GRB) afterglows including GRBs up to September 2009, for total 76 GRBs, and present an additional three pre-Swift not included in earlier sample. Furthermore, we publish 840 new points 42 GRB afterglows, sets 050319, 050408, 050802, 050820A, 050922C, 060418, 080413A 080810. analyzed light curves all derived spectral energy distributions with best quality, allowing us estimate host...
(Abridged). We present a sample of 77 optical afterglows (OAs) Swift detected GRBs for which spectroscopic follow-up observations have been secured. provide linelists and equivalent widths all lines redward Ly-alpha. discuss to what extent the current bursts with OA spectroscopy is biased subsample GRBs. For that purpose we define an X-ray selected optimal conditions ground-based follow up from period March 2005 September 2008; 146 fulfill our criteria. derive redshift distribution this...
We present multiwavelength observations of the afterglow GRB 130427A, brightest (in total fluence) gamma-ray burst (GRB) past 29 yr. Optical spectroscopy from Gemini-North reveals redshift to be z = 0.340, indicating that its unprecedented brightness is primarily result relatively close proximity Earth; intrinsic luminosities both and are not extreme in comparison other bright GRBs. a large suite spanning 300 s 130 days after demonstrate shows simple, smooth evolution at all frequencies,...
Gamma-ray bursts (GRBs) are flashes of high-energy radiation arising from energetic cosmic explosions. Bursts long (>2 s) duration produced by the core-collapse massive stars, those short (< 2 merger two neutron stars (NSs). A third class events with hybrid properties was identified, but never conclusively linked to a stellar progenitor. The lack bright supernovae rules out typical explosions, their distance scales prevent sensitive searches for direct signatures progenitor system. Only...
XIPE, the X-ray Imaging Polarimetry Explorer, is a mission dedicated to Astronomy. At time of writing XIPE in competitive phase A as fourth medium size ESA (M4). It promises reopen polarimetry window high energy Astrophysics after more than 4 decades thanks detector that efficiently exploits photoelectric effect and optics with large effective area. uniqueness time-spectrally-spatially- resolved breakthrough astrophysics fundamental physics. Indeed payload consists three Gas Pixel Detectors...
Abstract We present a search for extragalactic fast blue optical transients (FBOTs) during Phase I of the Zwicky Transient Facility (ZTF). identify 38 candidates with durations above half-maximum light 1 day < t 1/2 12 days, which 28 have ( g − r ≲ −0.2 mag) colors at peak light. Of (28 FBOTs), 19 (13) can be spectroscopically classified as core-collapse supernovae (SNe): 11 (8) H- or He-rich (Type II/IIb/Ib) SNe, 6 (4) interacting IIn/Ibn) and 2 (1) H&He-poor Ic/Ic-BL) SNe. Two FBOTs...
Abstract The physical and orbital parameters of trans-Neptunian objects provide valuable information about the solar system’s formation evolution. In particular, characterization binaries provides insights into mechanisms that may be playing a role at such large distances from Sun. Studies show two distinct populations, (38628) Huya occupies an intermediate position between unequal-sized those with components roughly equal sizes. this work, we predicted observed three stellar occultation...
The exceptionally high luminosities of gamma-ray bursts (GRBs), gradually emerging as extremely useful probes star formation, make them promising tools for exploration the high-redshift Universe. Here we present a carefully selected sample Swift GRBs, intended to estimate in an unbiased way GRB mean redshift (), constraints on fraction and upper limit heavily obscured afterglows. We find that at least 7% GRBs originate . In addition, consistent with pre-Swift observations, most 20%...
We observed the Galactic black hole candidate XTE J1650-500 early in its fall of 2001 outburst with XMM-Newton European Photon Imaging pn Camera (EPIC-pn). The spectrum is consistent source having been "very high" state. find a broad, skewed Fe Kα emission line that suggests primary this system may be Kerr and indicates steep disk emissivity profile hard to explain terms standard accretion model. These results are quantitatively qualitatively similar those from an observation Seyfert galaxy...
Double neutron star (DNS) merger events are promosing candidates of short Gamma-ray Burst (sGRB) progenitors as well high-frequecy gravitational wave (GW) emitters. On August 17, 2017, such a coinciding event was detected by both the LIGO-Virgo detector network GW170817 and Gamma-Ray Monitor on board NASA's {\it Fermi} Space Telescope GRB 170817A. Here we show that fluence spectral peak energy this sGRB fall into lower portion distributions known sGRBs. Its isotropic luminosity is abnormally...
GRB 160821B is a short duration gamma-ray burst (GRB) detected and localized by the Neil Gehrels Swift Observatory in outskirts of spiral galaxy at z=0.1613, projected physical offset 16 kpc from galaxy's center. We present X-ray, optical/nIR radio observations its counterpart model them with two distinct components emission: standard afterglow, arising interaction relativistic jet surrounding medium, kilonova, powered radioactive decay sub-relativistic ejecta. Broadband modeling afterglow...