Bibcode
Aleksić, J.; Anderhub, H.; Antonelli, L. A.; Antoranz, P.; Backes, M.; Baixeras, C.; Balestra, S.; Barrio, J. A.; Bastieri, D.; Becerra-González, J.; Becker, J. K.; Bednarek, W.; Berdyugin, A.; Berger, K.; Bernardini, E.; Biland, A.; Bock, R. K.; Bonnoli, G.; Bordas, P.; Borla Tridon, D.; Bosch-Ramon, V.; Bose, D.; Braun, I.; Bretz, T.; Britzger, D.; Camara, M.; Carmona, E.; Carosi, A.; Colin, P.; Commichau, S.; Contreras, J. L.; Cortina, J.; Costado, M. T.; Covino, S.; Dazzi, F.; de Angelis, A.; de Cea Del Pozo, E.; de Los Reyes, R.; de Lotto, B.; de Maria, M.; de Sabata, F.; Delgado-Méndez, C.; Doert, M.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Elsaesser, D.; Errando, M.; Ferenc, D.; Fernández, E.; Firpo, R.; Fonseca, M. V.; Font, L.; Galante, N.; García-López, R. J.; Garczarczyk, M.; Gaug, M.; Godinovic, N.; Goebel, F.; Hadasch, D.; Herrero, A.; Hildebrand, D.; Höhne-Mönch, D.; Hose, J.; Hrupec, D.; Hsu, C. C.; Jogler, T.; Klepser, S.; Krähenbühl, T.; Kranich, D.; La Barbera, A.; Laille, A.; Leonardo, E.; Lindfors, E.; Lombardi, S.; Longo, F.; López, M.; Lorenz, E.; Majumdar, P.; Maneva, G.; Mankuzhiyil, N.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Mazin, D.; Meucci, M.; Miranda, J. M.; Mirzoyan, R.; Miyamoto, H.; Moldón, J.; Moles, M.; Moralejo, A.; Nieto, D.; Nilsson, K.; Ninkovic, J.; Orito, R.; Oya, I.; Paoletti, R. et al.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 517, id.A5
Fecha de publicación:
7
2010
Revista
Número de citas
18
Número de citas referidas
13
Descripción
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.
Aims: 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 ~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 ~ 0.76) 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
F95% CL = 5.5 × 10-11 erg cm-2
s-1 for the very-high energy emission of 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 ≲ 0.8), provided the
observations are carried out at early times, close to the onset of their
afterglow phase.
Proyectos relacionados
![Telescopio MAGIC Project Image](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/project/Imagen%20RGL.png?h=a38a7f06&itok=UgLTRZyC)
Astrofísica de Partículas
El Grupo de Astrofísica de Partículas del IAC participa activamente en tres grandes colaboraciones internacionales de astrofísica de muy altas energías: AMS (Alpha Magnetic Spectrometer), los telescopios de radiación Cherenkov MAGIC I y II, y el Cherenkov Telescope Array (CTA). AMS es un detector de partículas diseñado para operar en el espacio, a
Ramón
García López