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astro-ph2008★ 196 cited
On the nature of Seyfert galaxies with high [OIII]5007 blueshifts
S. Komossa, D. Xu, H. Zhou +2
We have studied the properties of Seyfert galaxies with high [OIII]5007 blueshifts (`blue outliers'), originally identified because of their strong deviation from the M_BH - sigma…
astro-ph2007★ 50 cited
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…
astro-ph2006★ 32 cited
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…