Kavli Affiliate: Steven Kahn | First 5 Authors: Chen Zheng, Roger W. Romani, Masao Sako, John Marriner, Bruce Bassett | Summary: This paper presents spectroscopy of supernovae discovered in the first season of the Sloan Digital Sky Survey-II Supernova Survey. This program searches for and measures multi-band light curves of supernovae in the redshift range […]
Kavli Affiliate: Andrew P. Rasmussen | First 5 Authors: Andrew P. Rasmussen, Steven M. Kahn, Frits Paerels, Jan Willem den Herder, Jelle Kaastra | Summary: In a series of papers, Nicastro et al. have reported the detection of z>0 OVII absorption features in the spectrum of Mrk421 obtained with the Chandra Low Energy Transmission Grating […]
Kavli Affiliate: Homer A. Neal | First 5 Authors: Homer A. Neal, Eduard De La Cruz Burelo, , , | Summary: A continuing mystery in particle physics is the large polarization observed in inclusive hyperon production in high energy p-p collisions. In this paper the authors advance the concept that the polarization effects can be […]
Kavli Affiliate: Robert A. Cameron | First 5 Authors: Martin C. Weisskopf, Thomas L. Aldcroft, Robert A. Cameron, Poshak Gandhi, Cédric Foellmi | Summary: Before the official first-light images, the Chandra X-Ray Observatory obtained an X-ray image of the field to which its focal plane was first exposed. We describe this historic observation and report […]
Kavli Affiliate: Andrew P. Rasmussen | First 5 Authors: Thierry Lanz, Gisela A. Telis, Marc Audard, Frits Paerels, Andrew P. Rasmussen | Summary: We present a non-LTE model atmosphere analysis of Chandra HRC-S/LETG and XMM-Newton RGS spectroscopy of the prototypical supersoft source CAL 83 in the Large Magellanic Cloud. Taken with a 16-month interval, the […]
Kavli Affiliate: Andrew P. Rasmussen | First 5 Authors: Thierry Lanz, Gisela A. Telis, Marc Audard, Frits Paerels, Andrew P. Rasmussen | Summary: We present a non-LTE model atmosphere analysis of Chandra HRC-S/LETG and XMM-Newton RGS spectroscopy of the prototypical supersoft source CAL 83 in the Large Magellanic Cloud. Taken with a 16-month interval, the […]
Kavli Affiliate: Peter Michelson | First 5 Authors: Roger W. Romani, David Sowards-Emmerd, Lincoln Greenhill, Peter Michelson, | Summary: We report the discovery of a radio-loud flat-spectrum QSO at z=5.47 with properties similar to those of the EGRET gamma-ray blazars. This source is the brightest radio QSO at z>5, with a pc-scale radio jet and […]
Kavli Affiliate: Daniel S. Akerib | First 5 Authors: Daniel S. Akerib, Sean M. Carroll, Marc Kamionkowski, Steven Ritz, | Summary: The past few years have seen dramatic breakthroughs and spectacular and puzzling discoveries in astrophysics and cosmology. In many cases, the new observations can only be explained with the introduction of new fundamental physics. […]