News Release Archive:

News Release 669 of 1051

January 11, 2001 12:30 PM (EST)

News Release Number: STScI-2001-03

'Death Spiral' Around a Black Hole Yields Tantalizing Evidence of an Event Horizon

Technical facts about this news release:

About this Object
Object Name: Cygnus XR-1
Object Description: Black Hole
Position (J2000): R.A. 19h 58m 21.52s
Dec. +35°12' 05.09"
Constellation: Cygnus
Distance: About 1.9 kpc (6000 light-years)
About the Data
Instrument: High Speed Photometer (HSP)
Exposure Dates: June 8, 1992; July14, 1992; August 14, 1992
Exposure Time: 3 hours
Principal Astronomers: J.F. Dolan (GSFC), R.C. Bless (Univ. of Wisconsin), G.W. Van Citters (NSF), J.L. Elliot (MIT), E.L. Robinson (Univ. of Texas), R.L.White (STScI)
About this Release
Release Date: January 11, 2001 9:30 a.m.(PST)/12:30 p.m.(EST)