Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Pollack, L. K."'
Publikováno v:
Astrophys.J.701:1605-1615,2009
We present results from an imaging and spectroscopic study of four strong MgII absorbers of W(2796) >~ 1 Ang revealed by the afterglow of GRB060418 at z_GRB=1.491. These absorbers, at z=0.603,0.656,1.107 and z_GRB, exhibit large ion abundances that s
Externí odkaz:
http://arxiv.org/abs/0902.3661
Autor:
Perley, D. A., Li, W., Chornock, R., Prochaska, J. X., Butler, N. R., Chandra, P., Pollack, L. K., Bloom, J. S., Filippenko, A. V., Swan, H., Yuan, F., Akerlof, C., Auger, M. W., Cenko, S. B., Chen, H. -W., Fassnacht, C. D., Fox, D., Frail, D., Johansson, E. M., Mignant, D. Le, McKay, T., Modjaz, M., Rujopakarn, W., Russell, R., Skinner, M. A., Smith, G. H., Smith, I., van Dam, M. A., Yost, S.
The optical afterglow of long-duration GRB 071003 is among the brightest yet to be detected from any GRB, with R ~ 12 mag in KAIT observations starting 42 s after the GRB trigger, including filtered detections during prompt emission. However, our hig
Externí odkaz:
http://arxiv.org/abs/0805.2394
Autor:
Perley, D. A., Bloom, J. S., Butler, N. R., Pollack, L. K., Holtzman, J., Blake, C. H., Kocevski, D., Vestrand, W. T., Li, W., Foley, R. J., Bellm, E., Chen, H. -W., Prochaska, J. X., Starr, D., Filippenko, A. V., Falco, E. E., Szentgyorgyi, A. H., Wren, J., Wozniak, P. R., White, R., Pergande, J.
We report on observations of a gamma-ray burst (GRB 061126) with an extremely bright (R ~ 12 mag at peak) early-time optical afterglow. The optical afterglow is already fading as a power law 22 seconds after the trigger, with no detectable prompt con
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703538
Publikováno v:
Astrophys.J.660:288-300,2007
We discuss images of the central ~10 kpc (in projection) of the galaxy merger NGC 6240 at H and K' bands, taken with the NIRC2 narrow camera on Keck II using natural guide star adaptive optics. We detect 28 star clusters in the NIRC2 images, of which
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701514
Publikováno v:
Astrophys.J. 646 (2006) 49-60
We report on the discovery of a supermassive binary black hole system in the radio galaxy 0402+379, with a projected separation between the two black holes of just 7.3 pc. This is the closest black hole pair yet found by more than two orders of magni
Externí odkaz:
http://arxiv.org/abs/astro-ph/0604042
Publikováno v:
Mon.Not.Roy.Astron.Soc. 359 (2005) 1229-1236
We present 5, 8, and 15 GHz total intensity and polarimetric observations of the radio source PKS 2322-123 taken with the Very Large Array (VLA). This small (11 kpc) source is located at the center of the cooling-core cluster Abell 2597. The inner X-
Externí odkaz:
http://arxiv.org/abs/astro-ph/0503250
Publikováno v:
Astrophys.J. 602 (2004) 123-135
We present results of multi-frequency VLBA observations of the compact symmetric object (CSO) 0402+379. The parsec-scale morphology of 0402+379 allows us to confirm it as a CSO, while VLA data clearly show the presence of kiloparsec-scale structure.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310663
Publikováno v:
Astrophys.J.589:733-751,2003
We present VLBA observations and a statistical analysis of 5 GHz VLBI polarimetry data from 177 sources in the Caltech-Jodrell Bank flat-spectrum (CJF) survey. The CJF survey, a complete, flux-density-limited sample of 293 extragalactic radio sources
Externí odkaz:
http://arxiv.org/abs/astro-ph/0302211
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