Optical dropout galaxies lensed by the cluster A2667
Context. We investigate the nature and the physical properties of ten z, Y, and J-dropout galaxies selected in the field of the lensing cluster A2667. Aims...
Optical emission associated with the radio jet in B2 1243+26
We present deep charge coupled device (CCD) imaging of the low-luminosity radio galaxy B2 1243+26 which contains a two-sided, well-defined radio jet at the kpc...
Optical Emission of the Ultraluminous X-Ray Source NGC 5408 X-1: Donor Star or Irradiated Accretion Disk?
We obtained three epochs of simultaneous Hubble Space Telescope (HST)/Wide Field Camera 3 and Chandra observations of the ultraluminous X-ray source (ULX) NGC...
We report on the results of optical follow-up observations of the counterpart of the gamma-ray burst GRB 970508, starting 7 hr after the event. Multicolor U-, B...
Optical follow-up of ROSAT discovered candidate members of the open cluster Coma Berenices
We have carried out an optical follow-up of twelve ROSAT discovered candidate members of the Coma Berenices open cluster. VRI photometry and low resolution ( ~...
Optical identification of the binary companion to the millisecond PSR J2302+4442 with the Gran Telescopio Canarias
We report detection of the binary companion to the millisecond pulsar J2302+4442 based on the deep observations performed with the Gran Telescopio Canarias. The...
Optical Identifications of Galaxy Clusters Among Objects from the Second Planck Catalogue of Sunyaev-Zeldovich Sources
We present the results of optical identifications and spectroscopic redshift measurements for galaxy clusters from the second Planck catalogue of Sunyaev...
Optical Identifications of High-Redshift Galaxy Clusters from the Planck Sunyaev-Zeldovich Survey
We present the results of optical identifications and spectroscopic redshift measurements for galaxy clusters from the second Planck catalogue of Sunyaev...