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Ionization break-out from millisecond pulsar wind nebulae: an X-ray probe of the origin of superluminous supernovae
Magnetic spin-down of a millisecond neutron star has been proposed as the power source of hydrogen-poor "superluminous" supernovae (SLSNe-I). However, producing an unambiguous test that canExpand
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Phase-resolved NuSTAR and Swift-XRT Observations of Magnetar 4U 0142+61
We present temporal and spectral analysis of simultaneous 0.5-79 keV Swift-XRT and NuSTAR observations of the magnetar 4U 0142+61. The pulse profile changes significantly with photon energy between 3Expand
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Dynamics and Afterglow Light Curves of GRB Blast Waves with a Long-lived Reverse Shock
We perform a detailed study on the dynamics of a relativistic blast wave with the presence of a long-lived reverse shock (RS). Although a short-lived RS has been widely considered, the RS is believedExpand
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Gamma-ray novae as probes of relativistic particle acceleration at non-relativistic shocks
The Fermi LAT discovery that classical novae produce >100 MeV gamma-rays establishes that shocks and relativistic particle acceleration are key features of these events. These shocks are likely to beExpand
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Shocks in nova outflows – I. Thermal emission
Growing evidence for shocks in nova outflows include (1) mult iple velocity components in the optical spectra; (2) hard X-ray emission starting wee ks to months after the outburst; (3) an early radioExpand
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Prompt thermal emission in gamma-ray bursts
Context. Gamma-ray burst (GRB) spectra globally appear non-thermal, but recent observations of a few bursts with Fermi GBM have confirmed previous indications from BATSE of the presence of anExpand
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Toward a Better Understanding of the GRB Phenomenon: A New Model For GRB Prompt Emission and its Effects on the New Lint– Epeak,irest,NT Relation
Gamma-ray burst (GRB) prompt emission spectra in the keV-MeV energy range are usually considered to be adequately fitted with the empirical Band function. Recent observations with the Fermi Gamma-rayExpand
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EVIDENCE FOR A PHOTOSPHERIC COMPONENT IN THE PROMPT EMISSION OF THE SHORT GRB 120323A AND ITS EFFECTS ON THE GRB HARDNESS-LUMINOSITY RELATION
The short GRB 120323A had the highest flux ever detected with the Gamma-Ray Burst Monitor on board the Fermi Gamma-Ray Space Telescope. Here we study its remarkable spectral properties and theirExpand
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PHASE-RESOLVED X-RAY SPECTRA OF MAGNETARS AND THE CORONAL OUTFLOW MODEL
We test a model recently proposed for the persistent hard X-ray emission from magnetars. In the model, hard X-rays are produced by a decelerating electron-positron flow in the closed magnetosphere.Expand
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On the Origin of GeV Emission in Gamma-Ray Bursts
The most common progenitors of gamma-ray bursts (GRBs) are massive stars with strong stellar winds. We show that the GRB blast wave in the wind should emit a bright GeV flash. It is produced byExpand
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