Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Landsman, W. B."'
Publikováno v:
A&A 627, A34 (2019)
We have performed a census of the UV-bright population in 78 globular clusters using wide-field UV telescopes. This population includes a variety of phases of post-horizontal branch (HB) evolution, including hot post-asymptotic giant branch (AGB) sta
Externí odkaz:
http://arxiv.org/abs/1905.06718
We observed asteroid (596) Scheila and its ejecta cloud using the Swift UV-optical telescope. We obtained photometry of the nucleus and the ejecta, and for the first time measured the asteroid's reflection spectrum between 290 - 500 nm. Our measureme
Externí odkaz:
http://arxiv.org/abs/1104.5227
We observed comet C/2007 N3 (Lulin) twice on UT 28 January 2009, using the UV grism of the Ultraviolet and Optical Telescope (UVOT) on board the Swift Gamma Ray Burst space observatory. Grism spectroscopy provides spatially resolved spectroscopy over
Externí odkaz:
http://arxiv.org/abs/1011.1571
Autor:
Kuin, N. P. M., Landsman, W. B., Page, M. J., Schady, P., Still, M., Breeveld, A. A., De Pasquale, M., Brown, P. J., Carter, M., James, C., Curran, P. A., Cucciara, A., Gronwall, C., Holland, S. T., Hoversten, E. A., Hunsberger, S., Kennedy, T., Koch, S., Lamoureux, H., Marshall, F. E., Oates, S. R., Parsons, A., Palmer, D., Roming, P., Smith, P. J.
We present the earliest ever ultraviolet spectrum of a gamma-ray burst (GRB) as observed with the Swift-UVOT. The GRB 081203A spectrum was observed for 50 seconds with the UV grism starting 251 seconds after the Swift-BAT trigger when the GRB was of
Externí odkaz:
http://arxiv.org/abs/0812.2943
Autor:
Roming, P. W. A., Koch, T. S., Oates, S. R., Porterfield, B. L., Berk, D. E. Vanden, Boyd, P. T., Holland, S. T., Hoversten, E. A., Immler, S., Marshall, F. E., Page, M. J., Racusin, J. L., Schneider, D. P., Breeveld, A. A., Brown, P. J., Chester, M. M., Cucchiara, A., De Pasquale, M., Gronwall, C., Hunsberger, S. D., Kuin, N. P. M., Landsman, W. B., Schady, P., Still, M.
Publikováno v:
Astrophys.J.690:163-188,2009
We present the first Swift Ultra-Violet/Optical Telescope (UVOT) gamma-ray burst (GRB) afterglow catalog. The catalog contains data from over 64,000 independent UVOT image observations of 229 GRBs first detected by Swift, the High Energy Transient Ex
Externí odkaz:
http://arxiv.org/abs/0809.4193
The wide range of UV extinction properties in the Small Magellanic Cloud (SMC) probably traces the effects of star formation on interstellar dust. The Swift UVOT, with its three UV filters (centred at 1800, 2200 and 2500 A respectively) and three opt
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510755
Autor:
Sohn, S. T., O'Connell, R. W., Kundu, A., Landsman, W. B., Burstein, D., Bohlin, R. C., Frogel, J. A., Rose, J. A.
We have obtained HST/STIS far- and near-UV photometry of globular clusters in four fields in the gE galaxy M87. To a limit of m(FUV) = 25 we detect a total of 66 globular clusters (GCs) in common with the deep HST optical-band study of Kundu et al. (
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510413
Autor:
O'Connell, R. W., Martin, J. R., Crane, J. D., Burstein, D., Bohlin, R. C., Landsman, W. B., Freedman, I., Rood, R. T.
Publikováno v:
Astrophys.J.635:305-310,2005
Using HST/STIS, we have detected far-ultraviolet nuclear activity in the giant elliptical galaxy NGC 1399, the central and brightest galaxy in the Fornax I cluster. The source reached a maximum observed far-UV luminosity of \~1.2 x 10e39 ergs/s in Ja
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509311
Autor:
Roming, P. W. A., Schady, P., Fox, D. B., Zhang, B., Liang, E., Mason, K. O., Rol, E., Burrows, D. N., Blustin, A. J., Boyd, P. T., Brown, P., Holland, S. T., McGowan, K., Landsman, W. B., Page, K. L., Rhoads, J. E., Rosen, S. R., Berk, D. Vanden, Barthelmy, S. D., Breeveld, A. A., Cucchiara, A., De Pasquale, M., Fenimore, E. E., Gehrels, N., Gronwall, C., Grupe, D., Goad, M. R., Ivanushkina, M., James, C., Kennea, J. A., Kobayashi, S., Mangano, V., Meszaros, P., Morgan, A. N., Nousek, J. A., Osborne, J. P., Palmer, D. M., Poole, T., Still, M. D., Tagliaferri, G., Zane, S.
Very early observations with the Swift satellite of gamma-ray burst (GRB) afterglows reveal that the optical component is not detected in a large number of cases. This is in contrast to the bright optical flashes previously discovered in some GRBs (e
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509273
Publikováno v:
Astron.Astrophys. 415 (2004) 313-323
Recent UV observations of the globular cluster NGC2808 (Brown et al. 2001) show a significant population of hot stars fainter than the zero-age horizontal branch (``blue hook'' stars), which cannot be explained by canonical stellar evolution. Their r
Externí odkaz:
http://arxiv.org/abs/astro-ph/0311215