The X-ray source population of the globular cluster M15: Chandra high resolution imaging

The globular cluster M15 was observed on three occasions with the High Resolution Camera on board Chandra in 2001 in order to investigate the X-ray source population in the cluster centre. After subtraction of the two bright central sources, four faint sources were identified within 50 arcsec of the core. One of these sources is probably the planetary nebula, K648, making this the first positive detection of X-rays from a planetary nebula inside a globular cluster. Another two are identified with UV variables (one previously known), which we suggest are cataclysmic variables (CVs). The nature of the fourth source is more difficult to ascertain, and we discuss whether it is possibly a quiescent soft X-ray transient (qSXT) or also a CV.Comment: 9 pages, 6 figures, accepted for publication in MNRAS. Original figures can be obtained from http://www.astro.helsinki.fi/~diana/M15.htm

Ranger VII: Briefing for Johnson Brings Out High Level Chit Chat on Various Aspects of Space

Last week, following NASA's brilliant success in photographing the moon with Ranger VII, several space agency officials visited the White House to brief President Johnson. Speaking to the President were Homer E. Newell, associate administrator of NASA for space sciences and applications; William H. Pickering, director of the Jet Propulsion Laboratory, which directs the Ranger project; and Donald F. Hornig, the President's science adviser. The following excerpts are from an official transcription of the briefing distributed by NASA