The GOLF instrument provides a stable and continuous measurement of the intensity of spatially integrated sunlight in one wing of the sodium D lines. Because the detected radiation results from atomic scattering, the GOLF signal can be traced to an atomic reference wavelength. The planned operations were to involve a form of relative photometry

We describe our methods to validate the absolute calibration of the infrared (IR) radiometry of the Midcourse Space Experiment (MSX) Point Source Catalog, version 1.2 (PSC1.2). These are based upon stars drawn from our current all-sky network of absolute calibrators and upon other stars that also support the calibration of ESA's Infrared Space

We report the discovery of a new double-image quasar that was found during a search for gravitational lenses in the southern sky. Radio source PMN J1838-3427 is composed of two flat-spectrum components with separation 1.0", flux density ratio 14:1, and matching spectral indices in VLA and VLBA images. Ground-based BRI images show the optical

The proto-planetary nebula Hen 3-1475 (IRAS 17423--1755) shows a remarkable highly--collimated optical jet with a spectacular S-shaped string of shock-excited knots (Bobrowsky et al. 1995, Riera et al. 1995, Borkowski et al. 1997). Moreover, extremely high velocities have been observed in the innermost regions of its optical jet, which decreases

We present multiwavelength monitoring of the Galactic microquasar GRS1915+105 in the infrared, X-ray, and radio bands using observations from the Whipple Observatory 1.2-m, Lowell Observatory 1.8-m, Palomar 5-m, and the United Kingdom Infrared telescopes, the Rossi X-ray Timing Explorer All-Sky Monitor, and the Green Bank Interferometer during May

Integral field optical spectroscopy using the INTEGRAL system, complemented with HST imaging, has been used to characterize the merging process giving rise to the ultraluminous infrared galaxy IRAS 08572+3915, the star formation along the tidal tails of the galaxy, and the nature of the nuclear ionizing sources deep within the galaxy. The overall