Kavli Affiliate: Richard Foster | First 5 Authors: Tanmoy Chattopadhyay, Sven Herrmann, Steven Allen, Jack Hirschman, Glenn Morris | Summary: X-ray Charge Coupled Devices (CCDs) have been the workhorse for soft X-ray astronomical instruments for the past quarter century. They provide broad energy response, extremely low electronic read noise, and good energy resolution in soft […]

Kavli Affiliate: Rainer Weiss | First 5 Authors: Jonathan W. Richardson, Ohkyung Kwon, H. Richard Gustafson, Craig Hogan, Brittany L. Kamai | Summary: Precision measurements are reported of the cross-spectrum of rotationally-induced differential position displacements in a pair of colocated 39 m long, high power Michelson interferometers. One arm of each interferometer is bent $90^{circ}$ […]

Kavli Affiliate: Michael M. Fausnaugh | First 5 Authors: Wenlong Yuan, Lucas M. Macri, Bradley M. Peterson, Adam G. Riess, Michael M. Fausnaugh | Summary: We derive a distance of $D = 16.6 pm 0.3$~Mpc ($mu=31.10pm0.04$~mag) to the archetypal narrow-line Seyfert 1 galaxy NGC 4051 based on Cepheid Period–Luminosity relations and new Hubble Space Telescope […]

Kavli Affiliate: Eric Miller | First 5 Authors: Arnab Sarkar, Yuanyuan Su, Scott Randall, Fabio Gastaldello, Isabella Trierweiler | Summary: We present joint Suzaku and Chandra observations of MKW4. With a global temperature of 1.6 keV, MKW4 is one of the smallest galaxy groups that have been mapped in X-rays out to the virial radius. […]

Kavli Affiliate: Ralf K. Heilmann | First 5 Authors: Ralf K. Heilmann, Alexander R. Bruccoleri, Jungki Song, Matthew T. Cook, James A. Gregory | Summary: High-resolution ($R = lambda /Delta lambda > 2000$) x-ray absorption and emission line spectroscopy in the soft x-ray band is a crucial diagnostic for the exploration of the properties of […]