Roger Blandford

TL;DR: In this paper, the broadband spectral energy distributions (SEDs) of three BL Lac objects 3FGL J0022.1−1855 (z = 0.689), 3Fgl J0630.9−2406 (z ≳ 1.239), and 3fgl J0811.2−7529 (z= 0.774), detected by Fermi with relatively flat gigaelectronvolt spectra, were collected simultaneously in the near-infrared to hard X-ray band.

TL;DR: In this paper , an analysis of 12 years of Fermi-LAT gamma-ray data was performed to confirm the long-sought connection between Galactic PeVatrons and SNRs.

TL;DR: For true insight into the nature of dark energy, measurements of the precision and accuracy of the Supernova/Acceleration Probe (SNAP) are required as discussed by the authors, which can pave the way for, but should not delay, SNAP by developing calibration, refinement, and systematics control.

TL;DR: In this article, the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.9, whose emission is dominated by the pulsar wind nebula (PWN) contribution, was analyzed.

TL;DR: In this paper, a new kinematical approach to cosmological ''dark energy'' studies was presented and applied to the three best available sets of redshift-independent distance measurements, from type Ia supernovae and X-ray cluster gas mass fraction measurements, obtaining clear statistical evidence for a late time transition from a decelerating to an accelerating phase.