PASADENA, Calif. -- NASA will host a news teleconference at 10 a.m. PST (1 p.m. EST), Wednesday, Feb. 27, to announce black hole observations from its newest X-ray telescope, the Nuclear Spectroscopic Telescope Array (NuSTAR), and the European Space Agency's XMM-Newton X-ray telescope.

The briefing participants are:

• Fiona Harrison, NuSTAR principal investigator, California Institute of Technology, Pasadena, Calif.
• Guido Risaliti, astronomer, Harvard-Smithsonian Center for Astrophysics, Cambridge, Mass., and the Italian National Institute for Astrophysics
• Arvind Parmar, head of Astrophysics and Fundamental Physics Missions Division, European Space Agency

Visuals will be posted at the start of the teleconference at: http://go.nasa.gov/15eT17V.

Audio of the teleconference will be streamed live on NASA's website at: http://www.nasa.gov/newsaudio. Audio and visuals will be live at http://www.ustream.tv/nasajpl2.

Audio and visuals will be streamed live online at: http://www.ustream.tv/nasajpl2 .

For more information about the European Space Agency's XMM-Newton X-ray telescope, visit: http://www.esa.int/Our_Activities/Space_Science/XMM-Newton_overview.