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16 papers
The Unusual Temporal and Spectral Evolution of the Type IIn Supernova 2011ht
P. W. A. Roming, T. A. Pritchard, J. L. Prieto +17
We present very early UV to optical photometric and spectroscopic observations of the peculiar Type IIn supernova (SN) 2011ht in UGC 5460. The UV observations of the rise to peak a…
An unusual stellar death on Christmas Day
C. C. Thöne, A. de Ugarte Postigo, C. L. Fryer +31
Long Gamma-Ray Bursts (GRBs) are the most dramatic examples of massive stellar deaths, usually as- sociated with supernovae (Woosley et al. 2006). They release ultra-relativistic j…
Discovery of the Onset of Rapid Accretion by a Dormant Massive Black Hole
D. N. Burrows, J. A. Kennea, G. Ghisellini +53
Massive black holes are believed to reside at the centres of most galaxies. They can be- come detectable by accretion of matter, either continuously from a large gas reservoir or i…
Multi-wavelength observations of 1RXH J173523.7-354013: revealing an unusual bursting neutron star
N. Degenaar, P. G. Jonker, M. A. P. Torres +14
On 2008 May 14, the Burst Alert Telescope aboard the Swift mission triggered on a type-I X-ray burst from the previously unclassified ROSAT object 1RXH J173523.7-354013, establishi…
GRB 090423 at a redshift of z~8.1
R. Salvaterra, M. Della Valle, S. Campana +42
Gamma-ray bursts (GRBSs) are produced by rare types of massive stellar explosions. Their rapidly fading afterglows are often bright enough at optical wavelengths, that they are det…
The 22-Month Swift-BAT All-Sky Hard X-ray Survey
J. Tueller, W. H. Baumgartner, C. B. Markwardt +36
We present the catalog of sources detected in the first 22 months of data from the hard X-ray survey (14--195 keV) conducted with the BAT coded mask imager on the \swift satellite.…