408 citations · 1.1k across the 7 of their papers we have counts for
6 papers
A High Signal-to-Noise Ratio Composite Spectrum of Gamma-ray Burst Afterglows
L. Christensen, J. P. U. Fynbo, J. X. Prochaska +3
We present a composite spectrum of 60 long duration gamma-ray burst (GRB) afterglows with redshifts in the range 0.35<z<6.7 observed with low resolution optical spectra. The compos…
IFU observations of the GRB 980425/SN 1998bw host galaxy: emission line ratios in GRB regions
L. Christensen, P. M. Vreeswijk, J. Sollerman +3
The collapsar model predicts that the progenitors of Gamma-ray Bursts (GRBs) are metal poor in Fe group elements. The existence of low metallicity stellar populations could manifes…
GROND - a 7-channel imager
J. Greiner, W. Bornemann, C. Clemens +19
We describe the construction of GROND, a 7-channel imager, primarily designed for rapid observations of gamma-ray burst afterglows. It allows simultaneous imaging in the Sloan g'r'…
The nature of the X-Ray Flash of August 24 2005
J. Sollerman, J. P. U. Fynbo, J. Gorosabel +23
We present comprehensive photometric R-band observations of the fading optical afterglow of the X-Ray Flash XRF050824, from 11 minutes to 104 days after the burst. The R-band light…
The Peculiar Type Ia Supernova 2005hk
V. Stanishev, S. Taubenberger, G. Blanc +15
We present a preliminary analysis of an extensive set of optical observations of the Type Ia SN 2005hk. We show that the evolution of SN 2005hk closely follows that of the peculiar…
Are short gamma-ray bursts collimated? GRB050709, a flare but no break
D. Watson, J. Hjorth, P. Jakobsson +5
From the small sample of afterglow lightcurves of short duration gamma-ray bursts (GRBs), the decays are rapid, roughly following a power-law in time. It has been assumed that the…