A Broad-Band X-Ray Telescope Observation of the Black Hole Candidate LMC X-1
Abstract
We present the spectrum of the black hole candidate LMC X- 1 as observed by the Broad-Band X-ray Telescope. The spectrum cannot be fitted by a simple model, but it requires a soft disk blackbody component and a power-law tail, confirming earlier studies. The blackbody disk component is essentially unchanged since the Ginga measurement in 1987. The implied mass of the compact object is ~4.7 (cos i)^1/2^M_sun_ from the soft component fit. We report a 95% confidence detection of weak emission features at ~5.1 keV and ~7.3 keV. If the 5.1 keV feature is attributed to Fe I Kα at 6.39 keV, then the redshift is ~0.19. No quasi- periodic behavior is found in the data at this epoch.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1994
- DOI:
- 10.1086/173722
- Bibcode:
- 1994ApJ...422..243S
- Keywords:
-
- Black Holes (Astronomy);
- Spectral Line Width;
- X Ray Astronomy;
- X Ray Spectra;
- Stellar Mass;
- X Ray Telescopes;
- Astrophysics;
- BLACK HOLE PHYSICS;
- STARS: INDIVIDUAL ALPHANUMERIC: LMC X-1;
- X-RAYS: STARS