Gray transits of WD 1145+017 over the visible band
We have observed several relatively deep transits of the white dwarf WD 1145+017 with the Gran Telescopio Canarias (GTC) in the wavelength range 480 to 920 nm...
GRB 011121: A Collimated Outflow into Wind-blown Surroundings
We report optical and near-infrared follow-up observations of GRB 011121 collected predominantly at ESO telescopes in Chile. We discover a break in the...
GRB 051028: an intrinsically faint gamma-ray burst at high redshift?
Aims.We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to...
Greening of the brown-dwarf desert. EPIC 212036875b: a 51 MJ object in a 5-day orbit around an F7 V star
Context. Although more than 2000 brown dwarfs have been detected to date, mainly from direct imaging, their characterisation is difficult due to their faintness...
Gregor@night: The future high-resolution stellar spectrograph for the GREGOR solar telescope
We describe the future night-time spectrograph for the GREGOR solar telescope and present its science core projects. The spectrograph provides a 3-pixel...
This paper describes the main characteristics of GRIS (GREGOR Infrared Spectrograph), the grating spectrograph installed in the recently inaugurated (May 2012)...
Ground-based follow-up in relation to Kepler asteroseismic investigation
The Kepler space mission, successfully launched in March 2009, is providing continuous and high-precision photometry of thousands of stars simultaneously. The...
Ground-based multi-color photometry of the γ Doradus-δ Scuti hybrid star KIC 6761539
We present a preliminary analysis of the first three nights of multi-color photometric data for a γ Doradus-δ Scuti hybrid star (KIC 6761539) that is also being...
Ground-based Near-infrared Observations of the Secondary Eclipse of CoRoT-2b
We present the results of a ground-based search for the secondary eclipse of the 3.3 M Jup transiting planet CoRoT-2b. We performed near-infrared photometry...