Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Kopač, D."'
Autor:
Marongiu, M., Guidorzi, C., Stratta, G., Gomboc, A., Jordana-Mitjans, N., Dichiara, S., Kobayashi, S., Kopac, D., Mundell, C. G.
Publikováno v:
A&A 658, A11 (2022)
Context. Gamma-ray burst (GRB) afterglows originate from the interaction between the relativistic ejecta and the surrounding medium. Consequently, their properties depend on several aspects: radiation mechanisms, relativistic shock micro-physics, cir
Externí odkaz:
http://arxiv.org/abs/2111.00359
Autor:
Covino, S., Wiersema, K., Fan, Y. Z., Toma, K., Higgins, A. B., Melandri, A., D'Avanzo, P., Mundell, C. G., Palazzi, E., Tanvir, N. R., Bernardini, M. G., Branchesi, M., Brocato, E., Campana, S., Alighieri, S. di Serego, Gotz, D., Fynbo, J. P. U., Gao, W., Gomboc, A., Gompertz, B., Greiner, J., Hjorth, J., Jin, Z. P., Kaper, L., Klose, S., Kobayashi, S., Kopac, D., Kouveliotou, C., Levan, A. J., Mao, J., Malesani, D., Pian, E., Rossi, A., Salvaterra, R., Starling, R. L. C., Steele, I., Tagliaferri, G., Troja, E., van der Horst, A. J., Wijers, R. A. M. J.
The merger of two dense stellar remnants including at least one neutron star (NS) is predicted to produce gravitational waves (GWs) and short duration gamma ray bursts (GRBs). In the process, neutron-rich material is ejected from the system and heavy
Externí odkaz:
http://arxiv.org/abs/1710.05849
Autor:
Melandri, A., Covino, S., Zaninoni, E., Campana, S., Bolmer, J., Cobb, B. E., Gorosabel, J., Kim, J. -W., Kuin, P., Kuroda, D., Malesani, D., Mundell, C. G., Nappo, F., Sbarufatti, B., Smith, R. J., Steele, I. A., Topinka, M., Trotter, A. S., Virgili, F. J., Bernardini, M. G., D'Avanzo, P., D'Elia, V., Fugazza, D., Ghirlanda, G., Gomboc, A., Greiner, J., Guidorzi, C., Haislip, J. B., Hanayama, H., Hanlon, L., Im, M., Ivarsen, K. M., Japelj, J., Jelinek, M., Kawai, N., Kobayashi, S., Kopac, D., LaCluyze, A. P., Martin-Carrillo, A., Murphy, D., Reichart, D. E., Salvaterra, R., Salafia, O. S., Tagliaferri, G., Vergani, S. D.
Publikováno v:
A&A 607, A29 (2017)
We present a comprehensive temporal and spectral analysis of the long Swift GRB 120327A afterglow data to investigate the possible causes of the observed early time colour variations. We collected data from various instruments/telescopes in different
Externí odkaz:
http://arxiv.org/abs/1709.08865
Autor:
Steele, I. A., Kopac, D., Arnold, D. M., Smith, R. J., Kobayashi, S., Jermak, H. E., Mundell, C. G., Gomboc, A., Guidorzi, C., Melandri, A., Japelj, J.
We present a catalog of early-time (~10^2-10^4s) photometry and polarimetry of all Gamma-Ray Burst (GRB) optical afterglows observed with RINGO2 imaging polarimeter on the Liverpool Telescope. For the 19 optical afterglows observed, the following 9 w
Externí odkaz:
http://arxiv.org/abs/1706.03974
Autor:
Alexander, K. D., Laskar, T., Berger, E., Guidorzi, C., Dichiara, S., Fong, W., Gomboc, A., Kobayashi, S., Kopac, D., Mundell, C. G., Tanvir, N. R., Williams, P. K. G.
We present multi-wavelength observations and modeling of the exceptionally bright long $\gamma$-ray burst GRB 160625B. The optical and X-ray data are well-fit by synchrotron emission from a collimated blastwave with an opening angle of $\theta_j\appr
Externí odkaz:
http://arxiv.org/abs/1705.08455
Autor:
Kopac, D., Mundell, C. G., Japelj, J., Arnold, D. M., Steele, I. A., Guidorzi, C., Dichiara, S., Kobayashi, S., Gomboc, A., Harrison, R. M., Lamb, G. P., Melandri, A., Smith, R. J., Virgili, F. J., Castro-Tirado, A. J., Gorosabel, J., Jarvinen, A., Sanchez-Ramirez, R., Oates, S. R., Jelinek, M.
Gamma-ray burst GRB 140430A was detected by the Swift satellite and observed promptly with the imaging polarimeter RINGO3 mounted on the Liverpool Telescope, with observations beginning while the prompt $\gamma$-ray emission was still ongoing. In thi
Externí odkaz:
http://arxiv.org/abs/1509.03099
Autor:
Kopac, D., Mundell, C. G., Kobayashi, S., Virgili, F. J., Harrison, R., Japelj, J., Guidorzi, C., Melandri, A., Gomboc, A.
We present predictions of centimeter and millimeter radio emission from reverse shocks in the early afterglows of gamma-ray bursts with the goal of determining their detectability with current and future radio facilities. Using a range of GRB propert
Externí odkaz:
http://arxiv.org/abs/1503.08428
Autor:
Japelj, J., Covino, S., Gomboc, A., Vergani, S. D., Goldoni, P., Selsing, J., Cano, Z., D'Elia, V., Flores, H., Fynbo, J. P. U., Hammer, F., Hjorth, J., Jakobsson, P., Kaper, L., Kopač, D., Krühler, T., Melandri, A., Piranomonte, S., Sánchez-Ramírez, R., Tagliaferri, G., Tanvir, N. R., Postigo, A. de Ugarte, Watson, D., Wijers, R. A. M. J.
Publikováno v:
A&A 579, A74 (2015)
In this work we use gamma-ray burst (GRB) afterglow spectra observed with the VLT/X-shooter spectrograph to measure rest-frame extinction in GRB lines-of-sight by modeling the broadband near-infrared (NIR) to X-ray afterglow spectral energy distribut
Externí odkaz:
http://arxiv.org/abs/1503.03623
Autor:
Melandri, A., Virgili, F. J., Guidorzi, C., Bernardini, M. G., Kobayashi, S., Mundell, C. G., Gomboc, A., Dintinjana, B., Hentunen, V. -P., Japelj, J., Kopač, D., Kuroda, D., Morgan, A. N., Steele, I. A., Quadri, U., Arici, G., Arnold, D., Girelli, R., Hanayama, H., Kawai, N., Mikuž, H., Nissinen, M., Salmi, T., Smith, R. J., Strabla, L., Tonincelli, M., Quadri, A.
Publikováno v:
A&A 572, A55 (2014)
The long ${\it Swift}$ gamma-ray burst GRB 120326A at redshift $z=1.798$ exhibited a multi-band light curve with a striking feature: a late-time, long-lasting achromatic rebrightening, rarely seen in such events. Peaking in optical and X-ray bands $\
Externí odkaz:
http://arxiv.org/abs/1409.6467
Autor:
Cano, Z., Postigo, A. de Ugarte, Pozanenko, A., Butler, N., Thone, C. C., Guidorzi, C., Kruhler, T., Gorosabel, J., Jakobsson, P., Leloudas, G., Malesani, D., Hjorth, J., Melandri, A., Mundell, C., Wiersema, K., D'Avanzo, P., Schulze, S., Gomboc, A., Johansson, A., Zheng, W., Kann, D. A., Knust, F., Varela, K., Akerlof, C. W., Bloom, J., Burkhonov, O., Cooke, E., de Diego, J. A., Dhungana, G., Farina, C., Ferrante, F. V., Flewelling, H. A., Fox, O. D., Fynbo, J., Gehrels, N., Georgiev, L., Gonzalez, J. J., Greiner, J., Guver, T., Hartoog, O., Hatch, N., Jelinek, M, Kehoe, R., Klose, S., Klunko, E., Kopac, D., Kutyrev, A., Krugl, Y., Lee, W. H., Levan, A., Linkov, V., Matkin, A., Minikulov, N., Molotov, I., Prochaska, J. Xavier, Richer, M. G., Roman-Zuniga, C. G., Rumyantsev, V., Sanchez-Ramirez, R., Steele, I., Tanvir, N. R., Volnova, A., Watson, A. M., Xu, D., Yuan, F.
Publikováno v:
A&A 568, A19 (2014)
We present optical and near-infrared (NIR) photometry for three gamma-ray burst supernovae (GRB-SNe): GRB 120729A, GRB 130215A / SN 2013ez and GRB 130831A / SN 2013fu. In the case of GRB 130215A / SN 2013ez, we also present optical spectroscopy at t-
Externí odkaz:
http://arxiv.org/abs/1405.3114