Zobrazeno 1 - 10
of 165
pro vyhledávání: '"Varela K"'
Autor:
Greiner, J., Krühler, T., Bolmer, J., Klose, S., Afonso, P. M. J., Elliott, J., Filgas, R., Graham, J. F., Kann, D. A., Knust, F., Yoldaş, A. Küpcü, Nardini, M., Guelbenzu, A. M. Nicuesa, Estay, F. Olivares, Rossi, A., Schady, P., Schweyer, T., Sudilovsky, V., Varela, K., Wiseman, P.
A dedicated gamma-ray burst (GRB) afterglow observing program was performed between 2007 and 2016 with GROND, a seven-channel optical and near-infrared imager at the 2.2m telescope of the Max-Planck Society at ESO/La Silla. In this first of a series
Externí odkaz:
http://arxiv.org/abs/2410.14441
Autor:
Klose, S., Schmidl, S., Kann, D. A., Guelbenzu, A. Nicuesa, Schulze, S., Greiner, J., Olivares, F., Kruehler, T., Schady, P., Afonso, P. M. J., Filgas, R., Fynbo, J. P. U., Perley, D. A., Rau, A., Rossi, A., Takats, K., Tanga, M., Updike, A. C., Varela, K.
Publikováno v:
A&A 622, A138 (2019)
Twenty years ago, GRB 980425/SN 1998bw revealed that long Gamma-Ray Bursts (GRBs) are physically associated with broad-lined type Ic supernovae. Since then more than 1000 long GRBs have been localized to high angular precision, but only in about 50 c
Externí odkaz:
http://arxiv.org/abs/1808.02710
Autor:
Greiner, J., Bolmer, J., Wieringa, M., van der Horst, A. J., Petry, D., Schulze, S., Knust, F., de Bruyn, G., Krühler, T., Wiseman, P., Klose, S., Delvaux, C., Graham, J. F., Kann, D. A., Moin, A., Nicuesa-Guelbenzu, A., Schady, P., Schmidl, S., Schweyer, T., Tanga, M., Tingay, S., van Eerten, H., Varela, K.
Publikováno v:
A&A 614, A29 (2018)
Deriving physical parameters from gamma-ray burst afterglow observations remains a challenge, even now, 20 years after the discovery of afterglows. The main reason for the lack of progress is that the peak of the synchrotron emission is in the sub-mm
Externí odkaz:
http://arxiv.org/abs/1802.01882
Autor:
Knust, F., Greiner, J., van Eerten, H. J., Schady, P., Kann, D. A., Chen, T. -W., Delvaux, C., Graham, J. F., Klose, S., Krühler, T., McConnell, N. J., Guelbenzu, A. Nicuesa, Perley, D. A., Schmidl, S., Schweyer, T., Tanga, M., Varela, K.
Publikováno v:
A&A 607, A84 (2017)
Short-duration GRBs with extended emission form a subclass of short GRBs, comprising about 15% of the short-duration sample. Afterglow detections of short GRBs are also rare (about 30%) due to their smaller luminosity. We present a multi-band data se
Externí odkaz:
http://arxiv.org/abs/1707.01329
Autor:
Kann, D. A., Schady, P., E., F. Olivares, Klose, S., Rossi, A., Perley, D. A., Zhang, B., Krühler, T., Greiner, J., Guelbenzu, A. Nicuesa, Elliott, J., Knust, F., Cano, Z., Filgas, R., Pian, E., Mazzali, P., Fynbo, J. P. U., Leloudas, G., Afonso, P. M. J., Delvaux, C., Graham, J. F., Rau, A., Schmidl, S., Schulze, S., Tanga, M., Updike, A. C., Varela, K.
Publikováno v:
A&A 617, A122 (2018)
Afterglows of Gamma-Ray Bursts (GRBs) are simple in the most basic model, but can show many complex features. The ultra-long duration GRB 111209A, one of the longest GRBs ever detected, also has the best-monitored afterglow in this rare class of GRBs
Externí odkaz:
http://arxiv.org/abs/1706.00601
Autor:
Kann, D. A., Schady, P., Olivares, F. E., Klose, S., Rossi, A., Perley, D. A., Krühler, T., Greiner, J., Guelbenzu, A. Nicuesa, Elliott, J., Knust, F., Filgas, R., Pian, E., Mazzali, P., Fynbo, J. P. U., Leloudas, G., Afonso, P. M. J., Delvaux, C., Graham, J. F., Rau, A., Schmidl, S., Schulze, S., Tanga, M., Updike, A. C., Varela, K.
Publikováno v:
A&A 624, A143 (2019)
GRB 111209A, one of the longest Gamma-Ray Bursts (GRBs) ever observed, is linked to SN 2011kl, the most luminous GRB-Supernova (SN) detected so far, which shows evidence for being powered by a magnetar central engine. We place SN 2011kl into the cont
Externí odkaz:
http://arxiv.org/abs/1606.06791
Autor:
Schady, P., Kruehler, T., Greiner, J., Graham, J. F., Kann, D. A., Bolmer, J., Delvaux, C., Elliott, J., Klose, S., Knust, F., Guelbenzu, A. Nicuesa, Rau, A., Rossi, A., Savaglio, S., Schmidl, S., Sudilovsky, T. Schweyer. V., Tanga, M., Tanvir, N. R., Varela, K., Wiseman, P.
Over the last decade there has been immense progress in the follow-up of short and long GRBs, resulting in a significant rise in the detection rate of X-ray and optical afterglows, in the determination of GRB redshifts, and of the identification of t
Externí odkaz:
http://arxiv.org/abs/1505.04415
Autor:
Varela, K., van Eerten, H., Greiner, J., Schady, P., Elliott, J., Sudilovsky, V., Krühler, T., van der Horst, A. J., Bolmer, J., Knust, F., Agurto, C., Azagra, F., Belloche, A., Bertoldi, F., De Breuck, C., Delvaux, C., Filgas, R., Graham, J., Guelbenzu, A. Nicuesa, Kann, D. A., Klose, S., Menten, K. M., Rau, A., Rossi, A., Schmidl, S., Schuller, F., Schweyer, T., Tanga, M ., Weiss, A., Wiseman, P., Wyrowski, F.
Publikováno v:
A&A 589, A37 (2016)
Aims. The aim of the study is to constrain the physics of gamma-ray bursts (GRBs) by analysing the multi-wavelength afterglow data set of GRB 121024A that covers the full range from radio to X-rays. Methods. Using multi-epoch broad-band observations
Externí odkaz:
http://arxiv.org/abs/1503.07513
Autor:
Wiersema, K., Covino, S., Toma, K., van der Horst, A. J., Varela, K., Min, M., Greiner, J., Starling, R. L. C., Tanvir, N. R., Wijers, R. A. M. J., Campana, S., Curran, P. A., Fan, Y., Fynbo, J. P. U., Gorosabel, J., Gomboc, A., Gotz, D., Hjorth, J., Jin, Z. P., Kobayashi, S., Kouveliotou, C., Mundell, C., O'Brien, P. T., Pian, E., Rowlinson, A., Russell, D. M., Salvaterra, R., Alighieri, S. di Serego, Tagliaferri, G., Vergani, S. D., Elliott, J., Farina, C., Hartoog, O. E., Karjalainen, R., Klose, S., Knust, F., Levan, A. J., Schady, P., Sudilovski, V., Willingale, R.
Gamma-ray bursts (GRBs) are most probably powered by collimated relativistic outflows (jets) from accreting black holes at cosmological distances. Bright afterglows are produced when the outflow collides with the ambient medium. Afterglow polarizatio
Externí odkaz:
http://arxiv.org/abs/1410.0489
Autor:
Friis, M., De Cia, A., Krühler, T., Fynbo, J. P. U., Ledoux, C., Vreeswijk, P. M., Malesani, D., Gorosabel, J., Starling, R. L. C., Jakobsson, P., Varela, K., Watson, D. J., Wiersema, K., Drachmann, A. P., Trotter, A., Thöne, C. C., Postigo, A. de Ugarte, D'Elia, V., Elliott, J., Maturi, M., Goldoni, P., Greiner, J., Haislip, J., Kaper, L., Knust, F., LaCluyze, A., Milvang-Jensen, B., Reichart, D., Schulze, S., Sudilovsky, V., Vergani, S. D.
Publikováno v:
MRNAS, 451, 167 (2015)
We present the first reported case of the simultaneous metallicity determination of a gamma-ray burst (GRB) host galaxy, from both afterglow absorption lines as well as strong emission-line diagnostics. Using spectroscopic and imaging observations of
Externí odkaz:
http://arxiv.org/abs/1409.6315