An Upper Limit to the Number Intensity Distribution of Cosmic Gamma-Ray Bursts
An upper stratospheric layer of enhanced HNO3 following exceptional solar storms
An Usage Measure Based on Psychophysical Relations
An X-band spacecraft transponder for deep space applications - Design concepts and breadboard performance
An X-ray exploration of a wind bowshock from a single star
An X-Ray Flux-Limited Sample of Galaxy Groups
An X-Ray Imaging Survey of Jets from X-Ray Binaries : Energetics of Outflows from Neutron Stars and Black Holes
An X-ray jet from the Vela pulsar
An X-Ray Microlensing Test of the Au-Scale Central Structure of the Quadruple Quasar 2237+0305
An X-Ray Microlensing Test of the Au-Scale Central Structure of the Quadruple Quasar 2237+0305
An X-Ray Microlensing Test of the Au-Scale Central Structure of the Quadruple Quasar 2237+0305
An X-Ray Microlensing Test of the Au-Scale Central Structure of the Quadruple Quasar 2237+0305
An X-Ray Microlensing Test of the Au-Scale Central Structure of the Quadruple Quasar 2237+0305
An X-Ray Microlensing Test of the Au-Scale Central Structure of the Quadruple Quasar 2237+0305 (einstein Cross)
An X-ray pinhole camera for the ESPRIT student rocket
An X-ray pulsar in SNR G109.1-1.0
An X-Ray Study of a Lens-Selected Group of Galaxies at Z=0.29
An X-ray Study of the extremely luminous Galaxy Cluster RXCJ 1504.1-0248
An X-Ray Study of the Most Distant Quasars from the Sloan Digital Sky Survey
An X-ray Study of the Nearby Massive Early-Type Galaxy NGC 4472