Hilbert scanning arithmetic coding for multispectral image compression
We consider the compression of multispectral images using Hilbert scanning and adaptive arithmetic coding. The Hilbert scan is a general technique for...
Hinode Observations of Flux Emergence in Quiet and Active Regions
We review briefly the observational understanding of emergence of flux in both the quiet Sun and active regions in the light of first results from the joint...
Hints of the Star Formation History in a SMC Field
We present here a part of the project aimed to study the SFH in different parts of the SMC. We observed 12 fields during a four year campaign (2001-2004) using...
In the framework of a long-term program aimed at studying stellar populations in the Carina dSph galaxy, we present the photometric calibration of the two...
Hipparcos, IUE, and the Stellar Content of the Solar Neighbourhood
The spectroscopic parallaxes in the Hipparcos catalogue can be used to translate absolute stellar fluxes observed at Earth to the fluxes emerging at the stellar...
Hipparcos, VLA and CCD Observations of CYG OB2 No. 5
Cyg OB2 No. 5 (BD+40deg4220; V729 Cyg) is known to be a contact binary system formed by two O-type stars. For this object a 6-cm radio emission has been...
HIRES, the High-resolution Spectrograph for the ELT
HIRES will be the high-resolution spectrograph at optical and near-infrared (NIR) wavelengths for ESO's Extremely Large Telescope (ELT). It will consist of...
HIRES: the high resolution spectrograph for the E-ELT
The current instrumentation plan for the E-ELT foresees a High Resolution Spectrograph conventionally indicated as HIRES. Shaped on the study of extra-solar...