The Century Survey is a photometric survey strip from which we select blue stars to probe the Milky Way halo. We obtain S/N=30 spectra for every star with (V-R)

We present the result of a search for Cepheids in the Local Group dwarf irregular galaxy Pegasus. We identified 20 Cepheid stars with periods 0.6d P 15.3d...

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While optical and quantum efficiency are on the rise, and spectrographs becoming massively multiplexed, measuring spectral energy distributions of astronomical...

We present reliable, serendipitous x-ray detections found in three different deep ACIS imaging fields in two different energy bandpasses. We ran the Chandra X...

The launch of the Chandra X-ray Observatory in July 1999 opened a new era in X-ray astronomy. Its unprecedented,

We present step-by-step X-ray data analysis procedures as part of the Chandra Multi-wavelength Project. They consist of additional data corrections and data...

FRIDA (inFRared Imager and Dissector for the Adaptive optics system of the Gran Telescopio Canarias) is a diffraction limited instrument that will offer broad...

Preliminary results from bidimensional long-slit spectroscopic observations of the prototypical low-metallicity dwarf galaxy I Zw 18 are presented. Eight evenly...