Zobrazeno 1 - 10
of 728
pro vyhledávání: '"Jaunsen, A."'
Autor:
Hjorth, Jens, Malesani, Daniele, Jaunsen, Andreas O., Levan, Andrew J., Milvang-Jensen, Bo, Watson, Darach, Gorosabel, Javier, Fynbo, Johan P. U., Michałowski, Michał J., Tanvir, Nial R., Jakobsson, Páll, Møller, Palle, Schulze, Steve, Krühler, Thomas
Publikováno v:
PoS(GRB 2012)136
GRB-selected galaxies are broadly known to be faint, blue, young, star-forming dwarf galaxies. This insight, however, is based in part on heterogeneous samples of optically selected, lower-redshift galaxies. To study the statistical properties of GRB
Externí odkaz:
http://arxiv.org/abs/1208.6288
Autor:
Hjorth, Jens, Malesani, Daniele, Jakobsson, Páll, Jaunsen, Andreas O., Fynbo, Johan P. U., Gorosabel, Javier, Krühler, Thomas, Levan, Andrew J., Michałowski, Michał J., Milvang-Jensen, Bo, Møller, Palle, Schulze, Steve, Tanvir, Nial R., Watson, Darach
Publikováno v:
Astrophys.J. 756 (2012) 187
Long-duration gamma-ray bursts (GRBs) are powerful tracers of star-forming galaxies. We have defined a homogeneous subsample of 69 Swift GRB-selected galaxies spanning a very wide redshift range. Special attention has been devoted to making the sampl
Externí odkaz:
http://arxiv.org/abs/1205.3162
In order to maximize the scientific return of the telescopes located at the Paranal Observatory, we analyse the properties of the atmosphere above Paranal in the near-infrared (NIR). We estimate atmospheric extinction in the spectral range 1.10-2.30
Externí odkaz:
http://arxiv.org/abs/1102.1214
Autor:
Fynbo, J. P. U., Jakobsson, P., Prochaska, J. X., Malesani, D., Ledoux, C., Postigo, A. de Ugarte, Nardini, M., Vreeswijk, P. M., Wiersema, K., Hjorth, J., Sollerman, J., Chen, H. -W., Thoene, C. C., Bjoernsson, G., Bloom, J. S., Castro-Tirado, A., Christensen, L., De Cia, A., Fruchter, A. S., Gorosabel, J. U., Graham, J. F., Jaunsen, A., Jensen, B. L., Kann, D. A., Kouveliotou, C., Levan, A., Maund, J., Masetti, N., Milvang-Jensen, B., Palazzi, E., Perley, D. A., Pian, E., Rol, E., Schady, P., Starling, R., Tanvir, N., Watson, D. J., Xu, D., Augusteijn, T., Grundahl, F., Telting, J., Quirion, P. -O.
Publikováno v:
Astrophys.J.Supp.185:526-573,2009
(Abridged). We present a sample of 77 optical afterglows (OAs) of Swift detected GRBs for which spectroscopic follow-up observations have been secured. We provide linelists and equivalent widths for all detected lines redward of Ly-alpha. We discuss
Externí odkaz:
http://arxiv.org/abs/0907.3449
Dust Extinction in High-z Galaxies with GRB Afterglow Spectroscopy - The 2175{\AA} Feature at z=2.45
Autor:
Elíasdóttir, Á., Fynbo, J. P. U., Hjorth, J., Ledoux, C., Watson, D., Andersen, A. C., Malesani, D., Vreeswijk, P. M., Prochaska, J. X., Sollerman, J., Jaunsen, A. O.
Publikováno v:
Astrophys.J.697:1725-1740,2009
We report the clear detection of the 2175A dust absorption feature in the optical afterglow spectrum of the gamma-ray burst (GRB) GRB070802 at a redshift of z=2.45. This is the highest redshift for a detected 2175A dust bump to date, and it is the fi
Externí odkaz:
http://arxiv.org/abs/0810.2897
(Abridged) We use VLT/UVES high-resolution optical spectroscopy of seven GRB afterglows at z_GRB>2 to investigate circumburst and interstellar plasma in the host galaxies. Our sample consists of GRBs 021004, 050730, 050820, 050922C, 060607, 071031, a
Externí odkaz:
http://arxiv.org/abs/0809.3247
Autor:
Thöne, C. C., Kann, D. A., Jóhannesson, G., Selj, J. H., Jaunsen, A. O., Fynbo, J. P. U., Akerlof, C. W., Baliyan, K. S., Bartolini, C., Bikmaev, I. F., Bloom, J. S., Burenin, R. A., Cobb, B. E., Covino, S., Curran, P. A., Dahle, H., Ferrero, A., Foley, S., French, J., Fruchter, A. S., Ganesh, S., Graham, J. F., Greco, G., Guarnieri, A., Hanlon, L., Hjorth, J., Ibrahimov, M., Israel, G. L., Jakobsson, P., Jelínek, M., Jensen, B. L., Jørgensen, U. G., Khamitov, I. M., Koch, T. S., Levan, A. J., Malesani, D., Masetti, N., Meehan, S., Melady, G., Nanni, D., Näränen, J., Pakstiene, E., Pavlinsky, M. N., Perley, D. A., Piccioni, A., Pizzichini, G., Pozanenko, A., Roming, P. W. A., Rujopakarn, W., Rumyantsev, V., Rykoff, E. S., Sharapov, D., Starr, D., Sunyaev, R. A., Swan, H., Tanvir, N. R., Terra, F., Vreeswijk, P. M., Wilson, A. C., Yost, S. A., Yuan, F.
Publikováno v:
Astron.Astrophys.523:A70,2010
Aims: With this paper we want to investigate the highly variable afterglow light curve and environment of gamma-ray burst (GRB) 060526 at $z=3.221$. Methods: We present one of the largest photometric datasets ever obtained for a GRB afterglow, consis
Externí odkaz:
http://arxiv.org/abs/0806.1182
Autor:
Malesani, D., Fynbo, J. P. U., Hjorth, J., Leloudas, G., Sollerman, J., Stritzinger, M. D., Vreeswijk, P. M., Watson, D. J., Gorosabel, J., Michałowski, M. J., Thöne, C. C., Augusteijn, T., Bersier, D., Jakobsson, P., Jaunsen, A. O., Ledoux, C., Levan, A. J., Milvang-Jensen, B., Rol, E., Tanvir, N. R., Wiersema, K., Xu, D., Albert, L., Bayliss, M., Gall, C., Grove, L. F., Koester, B. P., Leitet, E., Pursimo, T., Skillen, I.
Publikováno v:
Astrophys. J.692:L84-L87, 2009; Astrophys.J.Lett.692:L84-L87,2009
SN 2008D was discovered while following up an unusually bright X-ray transient in the nearby spiral galaxy NGC 2770. We present early optical spectra (obtained 1.75 days after the X-ray transient) which allowed the first identification of the object
Externí odkaz:
http://arxiv.org/abs/0805.1188
Autor:
Tanvir, N. R., Levan, A. J., Rol, E., Starling, R. L. C., Gorosabel, J., Priddey, R. S., Malesani, D., Jakobsson, P., O'Brien, P. T., Jaunsen, A. O., Hjorth, J., Fynbo, J. P. U., Melandri, A., Gomboc, A., Milvang-Jensen, B., Fruchter, A. S., Jarvis, M., Fernandes, C. A. C., Wold, T.
Publikováno v:
Mon.Not.Roy.Astron.Soc.388:1743-1750, 2008
Gamma-ray bursts are powerful probes of the early universe, but locating and identifying very distant GRBs remains challenging. We report here the discovery of the K-band afterglow of Swift GRB 060923A, imaged within the first hour post-burst, and th
Externí odkaz:
http://arxiv.org/abs/0803.4100
Autor:
Jaunsen, A. O., Rol, E., Watson, D. J., Malesani, D., Fynbo, J. P. U., Milvang-Jensen, B., Hjorth, J., Vreeswijk, P. M., Ovaldsen, J. -E., Wiersema, K., Tanvir, N. R., Gorosabel, J., Levan, A. J., Schirmer, M., Castro-Tirado, A. J.
Publikováno v:
Astrophys. J. 681 (2008) 453-461
We report on the highly extinguished afterglow of GRB 070306 and the properties of the host galaxy. An optical afterglow was not detected at the location of the burst, but in near-infrared a doubling in brightness during the first night and later pow
Externí odkaz:
http://arxiv.org/abs/0803.4017