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Browsing by Author "Tanvir, N. R."

Browsing by Author "Tanvir, N. R."

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    The 2175 Å Extinction Feature in the Optical Afterglow Spectrum of GRB 180325A at z = 2.25 
    Zafar, T.; Elm Heintz, Kasper; Fynbo, J. P. U.; Malesani, D.; Bolmer, J.; Ledoux, C.; Arabsalmani, M.; Kaper, L.; Campana, S.; Starling, R. L. C.; Selsing, J.; Kann, D. A.; Postigo, A. de Ugarte; Schweyer, T.; Christensen, L.; Møller, P.; Japelj, J.; Perley, D.; Tanvir, N. R.; D’Avanzo, P.; Hartmann, D. H.; Hjorth, J.; Covino, S.; Sbarufatti, B.; Jakobsson, P.; Izzo, L.; Salvaterra, R.; D’Elia, V.; Xu, D. (American Astronomical Society, 2018-06-18)
    The ultraviolet (UV) extinction feature at 2175 Å is ubiquitously observed in the Galaxy but is rarely detected at high redshifts. Here we report the spectroscopic detection of the 2175 Å bump on the sightline to the γ-ray burst (GRB) afterglow GRB ...
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    The Emergence of a Lanthanide-rich Kilonova Following the Merger of Two Neutron Stars 
    Tanvir, N. R.; Levan, A. J.; González-Fernández, C.; Korobkin, O.; Mandel, I.; Rosswog, S.; Hjorth, J.; D’Avanzo, P.; Fruchter, A. S.; Fryer, C. L.; Kangas, T.; Milvang-Jensen, B.; Rosetti, S.; Steeghs, D.; Wollaeger, R. T.; Cano, Zach; Copperwheat, C. M.; Covino, S.; D’Elia, V.; de Ugarte Postigo, A.; Evans, P. A.; Even, W. P.; Fairhurst, S.; Jaimes, R. Figuera; Fontes, C. J.; Fujii, Y. I.; Fynbo, J. P. U.; Gompertz, B. P.; Greiner, J.; Hodosan, G.; Irwin, M. J.; Jakobsson, Pall; Jørgensen, U. G.; Kann, D. A.; Lyman, J. D.; Malesani, D.; McMahon, R. G.; Melandri, A.; O’Brien, P. T.; Osborne, J. P.; Palazzi, E.; Perley, D. A.; Pian, E.; Piranomonte, S.; Rabus, M.; Rol, E.; Rowlinson, A.; Schulze, S.; Sutton, P.; Thöne, C. C.; Ulaczyk, K.; Watson, D.; Wiersema, K.; Wijers, R. A. M. J. (American Astronomical Society, 2017-10-16)
    We report the discovery and monitoring of the near-infrared counterpart (AT2017gfo) of a binary neutron-star merger event detected as a gravitational wave source by Advanced Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo (GW170817) ...
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    The Environment of the Binary Neutron Star Merger GW170817 
    Levan, A. J.; Lyman, J. D.; Tanvir, N. R.; Hjorth, J.; Mandel, I.; Stanway, E. R.; Steeghs, D.; Fruchter, A. S.; Troja, E.; Schrøder, S. L.; Wiersema, K.; Bruun, S. H.; Cano, Zach; Cenko, S. B.; Postigo, A. de Ugarte; Evans, P.; Fairhurst, S.; Fox, O. D.; Fynbo, J. P. U.; Gompertz, B.; Greiner, J.; Im, M.; Izzo, L.; Jakobsson, Pall; Kangas, T.; Khandrika, H. G.; Lien, A. Y.; Malesani, D.; O’Brien, P.; Osborne, J. P.; Palazzi, E.; Pian, E.; Perley, D. A.; Rosswog, S.; Ryan, R. E.; Schulze, S.; Sutton, P.; Thöne, C. C.; Watson, D. J.; Wijers, R. A. M. J. (American Astronomical Society, 2017-10-16)
    We present Hubble Space Telescope (HST) and Chandra imaging, combined with Very Large Telescope MUSE integral field spectroscopy of the counterpart and host galaxy of the first binary neutron star merger detected via gravitational-wave emission by LIGO ...
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    Highly ionized metals as probes of the circumburst gas in the natal regions of gamma-ray bursts 
    Elm Heintz, Kasper; Watson, D; Jakobsson, Pall; Fynbo, J P U; Bolmer, J; Arabsalmani, M; Cano, Zach; Covino, S; D’Elia, V; Gomboc, A; Japelj, J; Kaper, L; Krogager, J-K; Pugliese, G; Sánchez-Ramírez, R; Selsing, J; Sparre, M; Tanvir, N R; Thöne, C C; de Ugarte Postigo, A; Vergani, S D (Oxford University Press (OUP), 2018-06-04)
    We present here a survey of high-ionization absorption lines in the afterglow spectra of long-duration gamma-ray bursts (GRBs) obtained with the VLT/X-shooter spectrograph. Our main goal is to investigate the circumburst medium in the natal regions of ...
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    Lyman continuum leakage in faint star-forming galaxies at redshift z = 3−3.5 probed by gamma-ray bursts 
    Vielfaure, J.-B.; Vergani, S. D.; Japelj, J.; Fynbo, J. P. U.; Gronke, M.; Elm Heintz, Kasper; Malesani, D. B.; Petitjean, P.; Tanvir, N. R.; D’Elia, V.; Kann, D. A.; Palmerio, J. T.; Salvaterra, R.; Wiersema, K.; Arabsalmani, M.; Campana, S.; Covino, S.; De Pasquale, M.; de Ugarte Postigo, A.; Hammer, F.; Hartmann, D. H.; Jakobsson, Pall; Kouveliotou, C.; Laskar, T.; Levan, A. J.; Rossi, A. (EDP Sciences, 2020-09)
    Context. The identification of the sources that reionized the Universe and their specific contribution to this process are key missing pieces of our knowledge of the early Universe. Faint star-forming galaxies may be the main contributors to the ionizing ...
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    X-shooting GRBs at high redshift: probing dust production history 
    Zafar, T; Møller, P; Watson, D; Lattanzio, J; Hopkins, A M; Karakas, A; Fynbo, J P U; Tanvir, N R; Selsing, J; Jakobsson, Pall; Heintz, K E; Kann, D A; Groves, B; Kulkarni, V; Covino, S; D’Elia, V; Japelj, J; Corre, D; Vergani, S (Oxford University Press (OUP), 2018-07-19)
    Evolved asymptotic giant branch (AGB) stars and Type  Ia supernovae (SNe) are important contributors to the elements that form dust in the interstellar medium of galaxies, in particular, carbon and iron. However, they require at least a Gyr to start ...