Physical Sciences and Mathematics | Open Access Articles

The Unusual Afterglow Of The Gamma-Ray Burst 100621a, J. Greiner, T. Krühler, M. Nardini, R. Filgas, A. Moin, C. De Breuck, F. Montenegro-Montes, A. Lundgren, S. Klose, P.M.J. Fonso, F. Bertoldi, J. Elliott, D.A. Kann, F. Knust, K. Menten, A. Nicuesa Guelbenzu, F. Olivares E., A. Rau, A. Rossi, P. Schady, S. Schmidl, G. Siringo, L. Spezzi, V. Sudilovsky, S.J. Tingay, Adria Updike, Z. Wang, A. Weiss, M. Wieringa, F. Wyrowski

Arts & Sciences Faculty Publications

Aims. With the afterglow of GRB 100621A being the brightest detected so far in X-rays, and superb GROND coverage in the optical/near-infrared during the first few hours, an observational verification of basic fireball predictions seemed possible. Methods. In order to constrain the broad-band spectral energy distribution of the afterglow of GRB 100621A, dedicated observations were performed in the optical/near-infrared with the 7-channel Gamma-Ray Burst Optical and Near-infrared Detector (GROND) at the 2.2mMPG/ESO telescope, in the sub-millimeter band with the large bolometer array LABOCA at APEX, and at radio frequencies with ATCA. Utilizing also Swift X-ray observations, we attempt an interpretation …

Go to article

On The Nature Of The Extremely Fast Optical Rebrightening Of The Afterglow Of Grb 081029, M. Nardini, J. Greiner, T. Krühler, R. Filgas, S. Klose, P. Afonso, C. Clemens, A. N. Guelbenzu, F. Olivares E., A. Rau, A. Rossi, Adria Updike, A. Küpcü Yoldas, A. Yoldas, D. Burlon, J. Elliott, D. A. Kann

Arts & Sciences Faculty Publications

Context. After the launch of the Swift satellite, the gamma-ray burst (GRB) optical light-curve smoothness paradigm has been questioned thanks to the faster and better sampled optical follow-up, which has unveiled a very complex behaviour. This complexity is triggering the interest of the whole GRB community. The GROND multi-channel imager is used to study optical and near-infrared (NIR) afterglows of GRBs with unprecedented optical and near-infrared temporal and spectral resolution. The GRB 081029 has a very prominent optical rebrightening event and is an outstanding example of the application of the multi-channel imager to GRB afterglows. Aims. Here we exploit the …

Go to article

Photometric Redshifts For Gamma-Ray Burst Afterglows From Grond And Swift/Uvot, T. Krühler, P. Schady, J. Greiner, P. Afonso, E. Bottacini, C. Clemens, R. Filgas, S. Klose, T. S. Koch, A. Küpcü-Yoldas, S. R. Oates, F. Olivares E., M. J. Page, S. Mcbreen, M. Nardini, A. Nicuesa Guelbenzu, A. Rau, P. W.A. Roming, A. Rossi, Adria Updike, A. Yoldas

Arts & Sciences Faculty Publications

No abstract provided.

Go to article

Grb071028b, A Burst Behind Large Amounts Of Dust In An Unabsorbed Galaxy, C. Clemens, J. Greiner, T. Krühler, D. Pierini, S. Savaglio, S. Klose, P.M.J. Afonso, R. Filgas, F.E. Olivares, A. Rau, P. Schady, A. Rossi, A. Küpcü Yoldas, Adria Updike, A. Yoldas

Arts & Sciences Faculty Publications

No abstract provided.

Go to article

The Nature Of “Dark” Gamma-Ray Bursts, J. Greiner, T. Krühler, S. Klose, P. Afonso, C. Clemens, R. Filgas, D. H. Hartmann, A. Küpcü Yoldas, M. Nardini, F. Olivares E., A. Rau, A. Rossi, P. Schady, Adria Updike

Arts & Sciences Faculty Publications

Context. Thirteen years after the discovery of the first afterglows, the nature of dark gamma-ray bursts (GRB) still eludes explanation: while each long-duration GRB typically has an X-ray afterglow, optical/NIR emission is only seen for 40–60% of them. Aims. Here we use the afterglow detection statistics of the systematic follow-up observations performed with GROND since mid-2007 in order to derive the fraction of “dark bursts” according to different methods, and to distinguish between various scenarios for “dark bursts”. Methods. Observations were performed with the 7-channel “Gamma-Ray Optical and Near-infrared Detector” (GROND) at the 2.2 m MPI/ESO telescope. We used the …

Go to article

The Bright Optical/Nir Afterglow Of The Faint Grb 080710 – Evidence Of A Jet Viewed Off-Axis, T. Krühler, J. Greiner, P. Afonso, D. Burlon, C. Clemens, R. Filgas, D. A. Kann, S. Klose, A. Küpcü Yolda¸, S. Mcbreen, F. Olivares, A. Rau, A. Rossi, S. Schulze, G. P. Szokoly, Adria Updike, A. Yolda¸S

Arts & Sciences Faculty Publications

Aims. We investigate the optical/near-infrared light curve of the afterglow of GRB 080710 in the context of rising afterglows. Methods. Optical and near-infrared photometry was performed using the seven-channel imager GROND and the Tautenburg Schmidt telescope. X-ray data were provided by the X-ray Telescope onboard the Swift satellite. We construct an empirical light curve model using the available broadband data, which is well-sampled in the time and frequency domains. Results. The optical/NIR light curve of the afterglow of GRB 080710 is dominated by an initial increase in brightness, which smoothly turns over into a shallow power law decay. At around …

Go to article

Physical Sciences and Mathematics Commons^™

Full-Text Articles in Physical Sciences and Mathematics

Arts & Sciences Faculty Publications

On The Nature Of The Extremely Fast Optical Rebrightening Of The Afterglow Of Grb 081029, M. Nardini, J. Greiner, T. Krühler, R. Filgas, S. Klose, P. Afonso, C. Clemens, A. N. Guelbenzu, F. Olivares E., A. Rau, A. Rossi, Adria Updike, A. Küpcü Yoldas, A. Yoldas, D. Burlon, J. Elliott, D. A. Kann

Arts & Sciences Faculty Publications

Arts & Sciences Faculty Publications

Grb071028b, A Burst Behind Large Amounts Of Dust In An Unabsorbed Galaxy, C. Clemens, J. Greiner, T. Krühler, D. Pierini, S. Savaglio, S. Klose, P.M.J. Afonso, R. Filgas, F.E. Olivares, A. Rau, P. Schady, A. Rossi, A. Küpcü Yoldas, Adria Updike, A. Yoldas

Arts & Sciences Faculty Publications

The Nature Of “Dark” Gamma-Ray Bursts, J. Greiner, T. Krühler, S. Klose, P. Afonso, C. Clemens, R. Filgas, D. H. Hartmann, A. Küpcü Yoldas, M. Nardini, F. Olivares E., A. Rau, A. Rossi, P. Schady, Adria Updike

Arts & Sciences Faculty Publications

Arts & Sciences Faculty Publications