Aims: Occultations of bright stars by planets provide information on the state of their atmospheres. An occultation of the bright star 45 Capricornii (HIP...
The omnipresent flux-dependent optical dips of the black hole transient Swift J1357.2−0933
Swift J1357.2-0933 is a black hole transient that is of particular interest due to the optical recurrent dips found during its first two outbursts (in 2011 and...
The ongoing outburst of the new symbiotic star IPHASJ190832.31+051226.6
Aims: Eleven new symbiotic stars have recently been discovered with IPHAS, the INT Hα survey of the Northern Galactic plane. The star IPHAS J190832.31+051226.6...
The onset of solar cycle 24. What global acoustic modes are telling us
We study the response of the low-degree, solar p-mode frequencies to the unusually extended minimum of solar surface activity since 2007. A total of 4768 days...
The optical counterpart to the Be/X-ray binary SAX J2239.3+6116
Context. Be/X-ray binaries represent the main group of high-mass X-ray binaries. The determination of the astrophysical parameters of the counterparts of these...
The optical counterparts of accreting millisecond X-ray pulsars during quiescence
Context: Eight accreting millisecond X-ray pulsars (AMXPs) are known to date. Although these systems are well studied at high energies, very little information...
The optical nebulae around the symbiotic Miras He 2-147, HM Sagittae and V1016 Cygni
We present narrowband images and [Nii]lambda 658.3 nm spectra, obtained under sub-arcsec seeing conditions, of the extended nebulae around the symbiotic Miras...
The optical properties of low redshift radio galaxies
We present morphological and photometric properties of 79 low redshift (z=-24.0 with a clear trend for FRI sources to be ~ 0.5 mag brighter than FRII galaxies...
The optical SN 2012bz associated with the long GRB 120422A
Aims: The association of Type Ic supernovae (SNe) with long-duration gamma-ray bursts (GRBs) is well established. We endeavor, through accurate ground-based...