Optical Emission of Ultraluminous X-ray Sources: Donor Star or Disk Irradiation?
After a decade of intense studies using the latest X-ray and optical telescopes, the nature of ultraluminous X-ray sources (ULXs) is still largely unknown. No...
We report on the results of optical follow-up observations of the counterpart of GRB970508 between 7 hours and 100 days after the event. Multi-colour U, B, V...
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) is an SDSS-III survey that is obtaining high resolution near-IR (H band) spectra of 100,000...
Optical ID of CXOM31 J004253.1+411422, a bright Black Hole X-ray Nova in M31
We report the likely optical ID of the bright transient recently discovered in M31, CXOM31 J004253.1+411422 (Henze et al, ATEL #2356). With a peak X-ray...
Optical Imaging of 57 spiral galaxies (Knapen+ 2004)
All B, R, I and Hα images described in the paper are presented electronically, along with the Ks images from Paper I (Knapen et al., 2003MNRAS.344..527K). The...
Optical Imaging of Serendipitous Chandra Field Sources in the Galactic Plane
Chandra X-ray Observatory has unprecedented spatial resolution and sensitivity. Its 0.5 arcsec on-axis PSF provides for the first time an angular resolution...