X-Ray Astronomy Data Center at the Max-Planck-Institute for Extraterrestrial Physics ( MPE )

Research activities, data center services, and databases related to the X-ray satellite ROSAT at the Max-Planck-Institute for extraterrestrial Physics.

X-Ray Timing Explorer ( XTE. GSFC.NASA )

The Rossi X-ray Timing Explorer is a Goddard mission which was launched on December 30th, 1995. RXTE is designed to facilitate the study of time variability in the emission of X-ray sources with moderate spectral resolution. Time scales from microseconds to months are covered in an instantaneous spectral range from 2 to 250 keV. It is designed for a required lifetime of two years, with a goal of five years.

X-Ray WWW Server ( at Uppsala Universitet )

The Server makes available bibliographies and databases related to x-ray spectroscopic physics. In particular, the Henke database of atomic scattering factors can be downloaded. Also, this is the site for the Atomic and Molecular Core- Edge Excitation Database and Bibliography, compiled originally by A.P. Hitchcock, and prepared by Hitchcock and Mancini for electronic distribution (COREXDB). A simple bibliographic search mechanism has been implemented for the COREX bibliography. A visualization mechanism is currently being developed to allow Web Browsers to preview datafiles as in-line GIFs before choosing to download.

X-rays from Hot Massive Stars ( XMEGA )

This site is a central location for scientists interested in the problem of X-ray emission from hot, massive stars. It contains a list of current observational projects and planned observations. Schedules of currently planned X-ray observations are also included for those interested in providing ground-based coordinated observations.

Xephem: An Interactive Ephemeris for X Windows/Motif ( XEPHEM )

Xephem is an interactive astronomical ephemeris program for X Windows systems. It computes heliocentric, geocentric and topocentric information for celestial objects. Xephem has built-in support for all planets; the moons of Jupiter, Saturn and Earth and Mars' central meridian longitude. Xephem supports objects in heliocentric or Earth orbit given the appropriate elements. Sample databases of over 16000 objects are included in the release kit. Xephem generates data in configurable tabular forms and in several detailed graphical formats. Xephem can plot and list all data fields and can be programmed to search for arbitrary circumstances. Xephem can serve as the control point for automated telescopes and can connect to auxiliary database servers in real-time via named streams pipes (UNIX fifos).

Xerox Palo Alto Research Center ( PARC )

XIRAF - a startup script for IRAF

XIRAF is C shell script which starts up an IRAF session on an xgterm, including starting an image display of the user's choice (i.e. SAOimage, XImtool, SAOtng). Its purpose is to provide a simple IRAF startup from Unix/Linux.

XMM Survey Science Centre ( XMM SSC )

The XMM Survey Science Centre (SSC) has responsibilities within the XMM project in three main areas:

      the follow-up/identification programme for the XMM serendipitous X-ray sky survey

      the development of science analysis software for XMM

      the "pipe-line processing" of all XMM observations.

XMM-Newton Science Operations Centre ( XMM, ESA )

ESA s X-ray Multi Mirror mission XMM-Newtion is the second Cornerstone in ESA's Long Term Scientific Programme. With a large collecting area of its mirrors and the high sensitivity of its cameras, XMM-Newton is expected to increase radically our understanding of high-energy sources - clues to a mysterious past, and keys to understanding the future of the Universe.

XMM-Newton ( ESA )

The European Space Agency's X-ray Multi-Mirror satellite is the most powerful X-ray telescope ever placed in orbit. It has an unprecedented sensitivity and the mission will help solve many cosmic mysteries, ranging from enigmatic black holes to the formation of galaxies.

XU, Guohong ( Princeton )

xxx.lanl.gov e-Print archive

Contains preprints for: High Energy Physics - Theory, High Energy Physics - Lattice, High Energy Physics - Phenomenology, Astrophysics, Condensed Matter Theory, General Relativity & Quantum Cosmology, Nuclear Theory, High Energy Physics - Experiment.