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Calibration of X-ray absorption in our Galaxy
Prediction of the soft X-ray absorption along lines of sight through our Galaxy is crucial for understanding the spectra of extragalactic sources, but requires a good estimate of the foregroundExpand
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Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs
We present a homogeneous X-ray analysis of all 318 gamma-ray bursts detected by the XRT on the Swift satellite up to 2008 July 23; this represents the largest sample of X-Ray GRB data published to date. Expand
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A γ-ray burst at a redshift of z ≈ 8.2
Long-duration γ-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z > 20 usingExpand
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An optical supernova associated with the X-ray flash XRF 060218
Long-duration γ-ray bursts (GRBs) are associated with type Ic supernovae that are more luminous than average and that eject material at very high velocities. Less-luminous supernovae were notExpand
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EPIC status of calibration and data analysis
We present XMM-Newton/EPIC spectra for the Laor et al. sample of Palomar Green (PG) quasars. We find that a power law provides a reasonable fit to the 2-5 keV region of the spectra. Excess soft X-rayExpand
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Broadband observations of the naked-eye γ-ray burst GRB 080319B
Long-duration γ-ray bursts (GRBs) release copious amounts of energy across the entire electromagnetic spectrum, and so provide a window into the process of black hole formation from the collapse ofExpand
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The Swift Burst Analyser I: BAT and XRT spectral and flux evolution of Gamma Ray Bursts
We present an online repository of BAT, XRT and combined BAT-XRT flux light curves in three energy regimes for all GRBs observed by the Swift satellite. Expand
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We present 10 new gamma-ray burst (GRB) redshifts and another five redshift limits based on host galaxy spectroscopy obtained as part of a large program conducted at the Very Large Telescope (VLT).Expand
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Constraints on active galactic nucleus accretion disc viscosity derived from continuum variability
We estimate a value of the viscosity parameter in active galactic nucleus (AGN) accretion discs for the Palomar-Green quasar sample. We assume that optical variability on time-scales of months toExpand
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GRB 061121: Broadband spectral evolution through the prompt and afterglow phases of a bright burst
Swift triggered on a precursor to the main burst of GRB 061121 (z = 1.314), allowing observations to be made from the optical to gamma-ray bands. Expand
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