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News Release Archive:

News Release 71 of 123

September 12, 2001 02:00 PM (EDT)

News Release Number: STScI-2001-29

Ancient Black Hole Speeds Through Sun's Galactic Neighborhood, Devouring Companion Star

Technical facts about this news release:

About this Object 
Object Name: XTE J1118+480
Object Description: Black Hole X-ray Nova
Position (J2000): R.A. 11h 18m 10.90s
Dec. +48° 02' 13.0''
Constellation: Ursa Major
Distance: 6,000 light-years from Earth
About the DSS Data 
Instrument: Glass photographic plates taken at the Schmidt telescope at the California Institute of Technology's Palomar Observatory; scanned for the Digitized Sky Survey (DSS) Projects.
Scan Epoch:
DSS POSS-I
DSS POSS-II
DSS POSS-II
Filters:
IIIaJ emulsion (blue)
IIIaF emulsion (red)
IIIaJ emulsion (blue)
Exposure Dates:
1953
1991; 1995
1996
About the X-Ray Data 
Instrument: NASA's Rossi X-Ray Timing Experiment (RXTE)
Filters: X-Ray wavelengths (2 - 250 keV)
Exposure Date: March 29, 2000
About the VLBA Data 
Instrument: NRAO's Very Large Baseline Array (VLBA)
Filters: 8.4 and 15.4 GHz
Exposure Date: May and July, 2000
About this Release 
Principal Astronomers:

F. Mirabel (Inst. for Astronomy and Space Physics of Argentina and French Atomic Energy Commission), V. Dhawan (NRAO), R. Mignani (ESO), I. Rodrigues (Brazilian National Research Council at the French Atomic Energy Commission), F. Guglielmetti (STScI)

Release Credit: NASA and F. Mirabel (Inst. for Astronomy and Space Physics of Argentina and French Atomic Energy Commission)
Release Date: September 12, 2001 2:00 p.m. (EDT)