1. Birth of a relativistic outflow in the unusual γ-ray transient Swift J164449.3+573451.

    Nature 476(7361):425 (2011) PMID 21866155

    Active galactic nuclei, which are powered by long-term accretion onto central supermassive black holes, produce relativistic jets with lifetimes of at least one million years, and the observation of the birth of such a jet is therefore unlikely. Transient accretion onto a supermassive black hole...
  2. Birth of a relativistic outflow in the unusual γ-ray transient Swift J164449.3+573451.

    Nature 476(7361):425 (2011) PMID 21866155

    Active galactic nuclei, which are powered by long-term accretion onto central supermassive black holes, produce relativistic jets with lifetimes of at least one million years, and the observation of the birth of such a jet is therefore unlikely. Transient accretion onto a supermassive black hole...
  3. The afterglow and elliptical host galaxy of the short gamma-ray burst GRB 050724.

    Nature 438(7070):988 (2005) PMID 16355217

    Despite a rich phenomenology, gamma-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness--the long-soft and the short-hard bursts. The discovery of afterglow emission from long GRBs was a watershed event, pinpointing their origin to star-forming galaxies, ...
  4. The afterglow and elliptical host galaxy of the short gamma-ray burst GRB 050724.

    Nature 438(7070):988 (2005) PMID 16355217

    Despite a rich phenomenology, gamma-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness--the long-soft and the short-hard bursts. The discovery of afterglow emission from long GRBs was a watershed event, pinpointing their origin to star-forming galaxies, ...
  5. The afterglow of GRB 050709 and the nature of the short-hard gamma-ray bursts.

    Nature 437(7060):845 (2005) PMID 16208362

    The final chapter in the long-standing mystery of the gamma-ray bursts (GRBs) centres on the origin of the short-hard class of bursts, which are suspected on theoretical grounds to result from the coalescence of neutron-star or black-hole binary systems. Numerous searches for the afterglows of s...
  6. The afterglow of GRB 050709 and the nature of the short-hard gamma-ray bursts.

    Nature 437(7060):845 (2005) PMID 16208362

    The final chapter in the long-standing mystery of the gamma-ray bursts (GRBs) centres on the origin of the short-hard class of bursts, which are suspected on theoretical grounds to result from the coalescence of neutron-star or black-hole binary systems. Numerous searches for the afterglows of s...
  7. Detection of a radio counterpart to the 27 December 2004 giant flare from SGR 1806-20.

    Nature 434(7037):1112 (2005) PMID 15858569

    It was established over a decade ago that the remarkable high-energy transients known as soft gamma-ray repeaters (SGRs) are located in our Galaxy and originate from neutron stars with intense (< or = 10(15)G) magnetic fields-so-called 'magnetars'. On 27 December 2004, a giant flare with a fluen...
  8. Detection of a radio counterpart to the 27 December 2004 giant flare from SGR 1806-20.

    Nature 434(7037):1112 (2005) PMID 15858569

    It was established over a decade ago that the remarkable high-energy transients known as soft gamma-ray repeaters (SGRs) are located in our Galaxy and originate from neutron stars with intense (< or = 10(15)G) magnetic fields-so-called 'magnetars'. On 27 December 2004, a giant flare with a fluen...
  9. The sub-energetic gamma-ray burst GRB 031203 as a cosmic analogue to the nearby GRB 980425.

    Nature 430(7000):648 (2004) PMID 15295592

    Over the six years since the discovery of the gamma-ray burst GRB 980425, which was associated with the nearby (distance approximately 40 Mpc) supernova 1998bw, astronomers have debated fiercely the nature of this event. Relative to bursts located at cosmological distance (redshift z approximate...
  10. The sub-energetic gamma-ray burst GRB 031203 as a cosmic analogue to the nearby GRB 980425.

    Nature 430(7000):648 (2004) PMID 15295592

    Over the six years since the discovery of the gamma-ray burst GRB 980425, which was associated with the nearby (distance approximately 40 Mpc) supernova 1998bw, astronomers have debated fiercely the nature of this event. Relative to bursts located at cosmological distance (redshift z approximate...
  11. A common origin for cosmic explosions inferred from calorimetry of GRB030329.

    Nature 426(6963):154 (2003) PMID 14614498

    Past studies have suggested that long-duration gamma-ray bursts have a 'standard' energy of E(gamma) approximately 10(51) erg in the ultra-relativistic ejecta, after correcting for asymmetries in the explosion ('jets'). But a group of sub-energetic bursts, including the peculiar GRB980425 associ...
  12. A common origin for cosmic explosions inferred from calorimetry of GRB030329.

    Nature 426(6963):154 (2003) PMID 14614498

    Past studies have suggested that long-duration gamma-ray bursts have a 'standard' energy of E(gamma) approximately 10(51) erg in the ultra-relativistic ejecta, after correcting for asymmetries in the explosion ('jets'). But a group of sub-energetic bursts, including the peculiar GRB980425 associ...
  13. The bright optical afterglow of the nearby gamma-ray burst of 29 March 2003.

    Nature 423(6942):844 (2003) PMID 12815424

    Past studies of cosmological gamma-ray bursts (GRBs) have been hampered by their extreme distances, resulting in faint afterglows. A nearby GRB could potentially shed much light on the origin of these events, but GRBs with a redshift z
  14. The bright optical afterglow of the nearby gamma-ray burst of 29 March 2003.

    Nature 423(6942):844 (2003) PMID 12815424

    Past studies of cosmological gamma-ray bursts (GRBs) have been hampered by their extreme distances, resulting in faint afterglows. A nearby GRB could potentially shed much light on the origin of these events, but GRBs with a redshift z
  15. Early optical emission from the gamma-ray burst of 4 October 2002.

    Nature 422(6929):284 (2003) PMID 12646914

    Observations of the long-lived emission--or 'afterglow'--of long-duration gamma-ray bursts place them at cosmological distances, but the origin of these energetic explosions remains a mystery. Observations of optical emission contemporaneous with the burst of gamma-rays should provide insight in...
  16. Early optical emission from the gamma-ray burst of 4 October 2002.

    Nature 422(6929):284 (2003) PMID 12646914

    Observations of the long-lived emission--or 'afterglow'--of long-duration gamma-ray bursts place them at cosmological distances, but the origin of these energetic explosions remains a mystery. Observations of optical emission contemporaneous with the burst of gamma-rays should provide insight in...
  17. Discovery of radio emission from the brown dwarf LP944-20.

    Nature 410(6826):338 (2001) PMID 11268202

    Brown dwarfs are not massive enough to sustain thermonuclear fusion of hydrogen at their centres, but are distinguished from gas-giant planets by their ability to burn deuterium. Brown dwarfs older than approximately 10 Myr are expected to possess short-lived magnetic fields and to emit radio an...
  18. Discovery of radio emission from the brown dwarf LP944-20.

    Nature 410(6826):338 (2001) PMID 11268202

    Brown dwarfs are not massive enough to sustain thermonuclear fusion of hydrogen at their centres, but are distinguished from gas-giant planets by their ability to burn deuterium. Brown dwarfs older than approximately 10 Myr are expected to possess short-lived magnetic fields and to emit radio an...
  19. A Transient Radio Source near the Center of the Milky Way Galaxy.

    Science 255(5051):1538 (1992) PMID 17820165

    In late December 1990, a new radio source appeared near the center of our galaxy rivaling the intensity of Sgr A(*) (the compact radio source at the galactic center). Following its first detection, the flux density of the galactic center transient (GCT) increased rapidly to a maximum 1 month lat...
  20. A Transient Radio Source near the Center of the Milky Way Galaxy.

    Science 255(5051):1538 (1992) PMID 17820165

    In late December 1990, a new radio source appeared near the center of our galaxy rivaling the intensity of Sgr A(*) (the compact radio source at the galactic center). Following its first detection, the flux density of the galactic center transient (GCT) increased rapidly to a maximum 1 month lat...