An attitude determination system for balloon-borne experiments is presented. The system provides pointing information in azimuth and elevation for instruments flying on stratospheric balloons over Antarctica. In-flight attitude is given by the real-time combination of readings from star cameras, a magnetometer, sun sensors, GPS, gyroscopes, tilt

We present HST/STIS optical and Gemini/NIFS near-IR IFU spectroscopy and archival Hubble Space Telescope (HST) imaging of the triplet of super star clusters (A1, A2, and A3) in the core of the M82 starburst. Using model fits to the Space Telescope Imaging Spectrograph (STIS) spectra and the weakness of red supergiant CO absorption features

We present results of an archaeoastronomical study of the Iberian cave-sanctuary of La Cueva de la Lobera in Castellar (Jaén, Spain), whose foundation has been dated to the second half of the fourth century BCE. The sanctuary consists of several terraces, a cave and a rock shelter that have been artificially modified. The main axis of the cave is

FRIDA will be a near infrared imager and integral field spectrograph covering the wavelength range from 0.9 to 2.5 microns. Primary observing modes are: direct imaging and integral field spectroscopy. This paper describes the main advances in the development of the electronics and control system for both the mechanisms and house-keeping of FRIDA

Optical and X-ray data of AGN classes show many discrepancies not fully understood yet. We have studied the `synapses' between them using artificial neural networks (González-Martín+14). To do so, we used flux-calibrated X-ray spectra of a sample of 90 emission line nuclei (ELN) observed with XMM-Newton. It includes starbursts (SB), transition

In this work, the analysis of multi-epoch (1995-2010) X-ray observations of the Seyfert 1 galaxy H0557-385 is presented. The wealth of data presented in this analysis show that the source exhibits dramatic spectral variability from a typical unabsorbed Seyfert 1 type spectrum to a Compton-thin absorbed state on time scales of ˜ 5 years. This