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- Publications
- Influence
The Collimation-corrected Gamma-Ray Burst Energies Correlate with the Peak Energy of Their νFν Spectrum
- G. Ghirlanda, G. Ghisellini, D. L. I. -. Oab, Merate, IoA - U. Cambridge
- Physics
- 29 May 2004
We consider all bursts with known redshift and νFν peak energy, E. For a good fraction of them an estimate of the jet opening angle is available from the achromatic break of their afterglow light… Expand
Gamma-Ray Bursts: New Rulers to Measure the Universe
- G. Ghirlanda, G. Ghisellini, +4 authors Uk
- Physics
- 18 August 2004
The best measure of the universe should be done using a standard "ruler" at any redshift. Type Ia supernovae (SN Ia) probe the universe up to z ~ 1.5, while the cosmic microwave background (CMB)… Expand
High resolution Chandra HETG and RXTE observations of GRS 1915+105 : A hot disk atmosphere & cold gas enriched in Iron and Silicon
- J. Lee, C. Reynolds, +7 authors Uk
- Physics
- 7 November 2001
The time-averaged 30 ks Chandra HETGS observation of the micro-quasar GRS 1915+105 in the low hard state reveals for the first time in this source neutral K absorption edges from Fe, Si, Mg, & S.… Expand
Probing the intergalactic medium with the Lyα forest along multiple lines of sight to distant QSOs
- M. Viel, S. Matarrese, +5 authors IoA - U. Cambridge
- Physics
- 14 May 2001
We present an effective implementation of analytical calculations of the Ly� opacity distribution of the Intergalactic Medium (IGM) along multiple lines of sight (LOS) to distant quasars in a… Expand
The shape of the relativistic iron K-alpha line from MCG6--6-30-15 measured with the Chandra HETGS and RXTE
- J. Lee, K. Iwasawa, +5 authors Uk
- Physics
- 29 March 2002
We confirm the detection of the relativistically broadened iron K-alpha emission at 6.4 keV with simultaneous Chandra HETGS and RXTE PCA observations. Heavily binned HETGS data show a disk line… Expand
The Chandra HETGS and RXTE view of GRS 1915+105
- J. Lee, C. Reynolds, +7 authors Uk
- Physics
- 8 August 2002
The Chandra AO1 HETGS observation of the micro-quasar GRS 1915+105 in the low hard state reveals (1) neutral K absorption edges from Fe, Si, Mg, and S in cold gas, and (2) highly ionized (Fe XXV and… Expand