| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Makishima, K.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2012Possible Detection of an Emission Cyclotron Resonance Scattering Feature from the Accretion-powered Pulsar 4U 1626-67citations
- 2012Spectral comparison of weak short bursts to the persistent X-rays from the magnetar 1E 1547.0-5408 in its 2009 outburstcitations
- 2010Wide-band Suzaku Analysis of the Persistent Emission from SGR 0501+4516 During the 2008 Outburstcitations
- 2009Suzaku Observation of the New Soft Gamma Repeater SGR 0501+4516 in Outburstcitations
- 2008Possible Suzaku detection of non-thermal X-ray signals from a rotating magnetized white dwarfcitations
- 2008Suzaku Broad-band Results On Cygnus X-1 In The Low/hard State
- 2007The Suzaku Observation of the Nucleus of the Radio-loud Active Galaxy Centaurus A: Constraints on Abundances of the Accreting Materialcitations
- 2007Suzaku observations of cyclotron resonances in binary X-ray pulsarscitations
- 2006Possible Suzaku detection of non-thermal X-ray signals from a rotating magnetized white dwarf
- 2006Possible Suzaku detection of non-thermal X-ray signals from a rotating magnetized white dwarf
- 2006Possible Suzaku detection of non-thermal X-ray signals from a rotating magnetized white dwarf
- 2006When Do Internal Shocks End and External Shocks Begin? Early-Time Broadband Modeling of GRB 051111citations
- 2002Performance of the ASTRO-E hard X-ray detectorcitations
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article
When Do Internal Shocks End and External Shocks Begin? Early-Time Broadband Modeling of GRB 051111
Abstract
Even with the renaissance in gamma-ray burst (GRB) research fostered by the Swift satellite, few bursts have both contemporaneous observations at long wavelengths and exquisite observations at later times across the electromagnetic spectrum. We present here contemporaneous imaging with the KAIT robotic optical telescope, dense optical sampling with Lulin, supplemented with infrared data from PAIRITEL and radio to gamma-ray data from the literature. For the first time, we can test the constancy of microphysical parameters in the internal-external shock paradigm and carefully trace the flow of energy from the GRB to the surrounding medium. KAIT data taken <~1 minute after the start of GRB 051111 and coinciding with the fading gamma-ray tail of the prompt emission indicate a smooth reinjection of energy into the shock. No color change is apparent in observations beginning ~1.5 minutes after the GRB and lasting for the first hour after the burst. There are achromatic flux modulations about the best-fit model at late (t~10<SUP>4</SUP> s) times, possibly due to variations in the external density. We find that the host galaxy extinction is well fit by a curve similar to that of the Small Magellanic Cloud. Low visual extinction, A<SUB>V</SUB>~0.2 mag, combined with high column densities determined from the X-ray and optical spectroscopy (N<SUB>H</SUB>>10<SUP>21</SUP> cm<SUP>-2</SUP>), indicate a low dust-to-metals ratio and a possible overabundance of the light metals. An apparent small ratio of total to selective extinction (R<SUB>V</SUB>~2) argues against dust destruction by the GRB. Time constancy of both the IR/optical/UV spectral energy distribution and the soft X-ray absorption suggests that the absorbing material is not local to the GRB....