Memorie della Società Astronomica Italiana Supplementi - Vol. 21

	GRBs as probes from the progenitors environment to the high redshift Universe Como, May 16-20, 2011 Editors: S. Campana, P. D'Avanzo, A. Melandri

	Index						p. 3
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	Foreword						p. 7
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	List of participants						p. 9
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Session I: Observational studies of GRB environments
	P. M. Vreeswijk, C. Ledoux, A. De Cia, A. Smette Probing the environment of GRBs with absorption-line spectroscopy						p. 14
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	V. D'Elia, G. Stratta Extremely dark GRBs: the case of GRB 100614A and GRB 100615A						p. 22
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Session II: Theoretical studies of GRB environment
	R. Hirschi, U. Frischknecht, F.-K. Thielemann Chemical signature of GRB progenitors at low metallicities						p. 28
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	C. Martayan, J. Zorec, D. Baade, Y. Frémat, S. Ekström, J. Fabregat Massive Be and Oe stars at low metallicity and long Gamma Ray Bursts						p. 34
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	A. J. van Marle, R. Keppens, S.-C. Yoon, N. Langer On the circumstellar medium of massive stars and how it may appear in GRB observations						p. 40
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Session III: Observations of GRBs at high redshift
	N. R. Tanvir, A. J. Levan Gamma Ray Bursts in the era of reionization						p. 46
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	R. Salvaterra High redshift GRBs and the epoch of reionization						p. 54
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	D. Burrows, D. Fox, D. Palmer, P. Romano, V. Mangano, V. La Parola, A. D. Falcone, P. W. A. Roming Optimizing the search for high-z GRBs: the JANUS X-ray coded aperture telescope						p. 59
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Session IV: A theoretical perspective on the high redshift Universe
	B. Ciardi GRBs as probes of the high-z universe						p. 69
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	K. Toma, T. Sakamoto, P. Mészáros Population III Gamma-Ray Bursts						p. 76
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	L. Nava, G. Ghirlanda Cosmology with Gamma-Ray Bursts						p. 82
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Session V: Chemical evolution of the Universe
	F. Matteucci, V. Grieco, L. Vincoletto Chemical evolution of galaxies and GRB cosmic rate						p. 86
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	F. Mannucci The metallicity properties of long-GRB hosts						p. 92
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Session VI: GRB host galaxies
	S. D. Vergani GRB host galaxy studies with VLT/X-shooter						p. 100
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	R. P.Church, A. J. Levan, M. B. Davies, N. Tanvir Short Gamma-Ray Bursts: evidence for an origin in globular clusters?						p. 104
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Session VII: Dust properties as probed by GRBs
	T. Zafar Dust extinction and environmental properties of GRB afterglows						p. 108
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	P. Schady, T. Dwelly, M. J. Page, T. Krühler, J. Greiner, S. R. Oates, M. De Pasquale, M. Nardini, P. W. A. Roming, A. Rossi, M. Still Dust extinction curves of GRB host galaxies						p. 113
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	J. Greiner, T. Krühler, P. M. J. Afonso, C. Clemens, J. Elliott, R. Filgas, D. Gruber, D. H. Hartmann, D. A. Kann, S. Klose, A. Küpcü Yoldas, S. McBreen, M. Nardini, A. Nicuesa Guelbenzu, F. Olivares, D. Pierini, A. Rau, A. Rossi, S. Savaglio, P. Schady, V. Sudilovsky, A. C. Updike GROND view of "dark bursts" and the related bias in host galaxy properties						p. 121
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	C. Guidorzi Dust properties of the faint GRB 080603A						p. 127
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	H. Hirashita Evolution of grain size distribution traced with Gamma Ray Burst host galaxies						p. 131
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	G. Stratta, S. Allerani, R. Maiolino Is GRB 050904 at z=6.3 absorbed by dust?						p.135
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Session VIII: GRBs as messengers
	C. L. Bianco, L. Amati, M.G. Bernardini, L. Caito, G. De Barros, L. Izzo, B. Patricelli, R. Ruffini The class of "disguised" short GRBs and its implications for the Amati relation						p. 139
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	V. Mangano, B. Sbarufatti, G. Stratta Extending the plateau luminosity-duration anticorrelation						p. 143
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Session IX: Instruments and missions for GRB studies
	J. Grindlay GRBs as probes: increasing both the high-z and short GRB sample						p. 147
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	P. W. A. Roming, S. G. Bilén, D. N. Burrows, A. D. Falcone, D. B. Fox, T. L. Herter, J. A. Kennea, M. L. McConnell, J. A. Nousek Joint Astrophysics Nascent Universe Satellite: utilizing GRBs as high redshift Probes						p. 155
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	D. Götz SVOM: a new mission for Gamma-Ray Bursts studies						p. 162
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	B. Grossan, K. Hurley, G. F. Smoot, I. Park, M. I. Panasyuk, N. Vedenkin, P. Connell, V. Reglero, B. Sutin The new Ultra-Fast Flash Observatory-100: measuring GRB UV-IR emission starting 1 ms after trigger						p. 168
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	L. Natalucci, P. Ubertini, A. Bazzano, M. Federici, M. T. Fiocchi, S. Lotti, J. E. Grindlay, N. Gehrels, M. Uslenghi, M. Fiorini, F. Perotti, P. Bastia, P. Leutenegger, F. Monzani GABI: a compact detector for GRB prompt emission spectroscopy						p. 173
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Special Session: The Christmas burst GRB 101225A
	C. Thöne, A. de Ugarte Postigo, C. Fryer, K. L. Page, J. Gorosabel, M. A. Aloy, D. A. Perley, C. Kouveliotou, H. T. Janka, P. Mimica, J. L. Racusin GRB 101225A - an unusual stellar death on Christmas Day						p. 177
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	S. Campana A Christmas comet falling onto a neutron star						p. 181
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Posters
	R. Hudec, V. Šimon ESA Gaia, ultra-low dispersion spectroscopy and GRBs						p. 186
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	A. Vlasis, Z. Meliani, R. Keppens Late activity in GRB afterglows. A multidimensional approach						p. 190
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	Z. P. Jin, D. Xu, S. Covino, P. D'Avanzo, L. A. Antonelli, D. M. Wei Early afterglow emission as a probe of the density profile of the medium surrounding Gamma-Ray Bursts						p. 194
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	A. Mészárose, J. Řípa, F. Ryde Apparently fainter Gamma-Ray Bursts at smaller redshifts: an absurdity or a reality?						p. 198
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	M. Hafizi, S. Boçi, R. Mochkovitch A review of the redshift influence on GRBs observed properties						p. 202
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	V. D'Elia, S. Campana, S. Covino, P. D'Avanzo, S. Piranomonte, G. Tagliaferri UVES and FORS2 spectroscopy of the GRB081008 afterglow						p. 206
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	P. Romano, V. Mangano, P. Esposito, J. A. Kennea, S. Vercellone, D. N. Burrows, G. Cusumano, H. A. Krimm, V. La Parola, C. Pagani, N. Gehrels Recent results from the Swift Supergiant Fast X-ray Transients Project						p. 210
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	D. Szécsi, Zs. Bagoly, A. Mészáros, L. G. Balázs, P. Veres, I. Horváth New background-filtering algorithm based on the motion of the Fermi Gamma-ray Space Telescope						p. 214
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	M. G. Dainotti, M. Ostrowski, R. Willingale Correlations of Gamma-Ray Bursts between the plateau and the prompt emission luminosities						p. 218
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	J. Japelj, A. Gomboc, D. Kopać Light extinction in GRB host galaxies						p. 222
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	M. G. Bernardini, R. Margutti, E. Zaninoni, G. Chincarini X-ray emission of GRBs: what is the light curve morphology telling us?						p. 226
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	A. V. Penacchioni, R. Ruffini, L. Izzo, M. Muccino, C. L. Bianco, L. Caito, B. Patricelli Evidences for a double component in the emission of GRB 101023						p. 230
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	D. Gruber, T. Krühler, S. Foley, M. Nardini, D. Burlon, A. Rau, E. Bissaldi, A. von Kienlin, S. McBreen, J. Greiner Fermi/GBM observations of the ultra-long GRB 091024						p. 235
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	D. Kopać, A. Gomboc, J. Japelj Environment properties of GRBs with early optical detection						p. 239
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