WASHINGTON — NASA will host a news teleconference at 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.

— Arvind Parmar, head of Astrophysics and Fundamental Physics Missions Division, European Space Agency

For dial-in information, media representatives should e-mail their name, affiliation and telephone number to J.D. Harrington at j.d.harrington@nasa.gov by noon Feb. 27.

Visuals will be posted at the start of the teleconference on NASA’s NuSTAR site: http://www.nasa.gov/nustar

Audio of the teleconference will be streamed live on NASA’s website at: http://www.nasa.gov/newsaudio

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