HR 1099 (= 4u 0336+01?)
Abstract
F. Walter, P. Charles and S. Bowyer, Space Sciences Laboratory, University of California at Berkeley; and G. Garmire, California Institute of Technology, using the HEAO-1 A-2 low-energy detectors, have observed on 1977 Aug. 17 a weak source of soft x-rays with a calculated peak flux of 2 x 10**-11 erg cm**-2 s**-1 near the position of the transient x-ray source 4U 0336+01. They suggest that HR 1099, a known radio source and one of the brightest RS CVn variables, is the optical counterpart of the soft source and probably of the transient also. The derived soft x-ray luminosity (0.15-2.8 keV) is ~ 3 x 10**30 erg s**-1, within a factor of two of that observed from the similar RS CVn system UX Ari. They also suggest that since alpha Aur has been found to be an x-ray source and is also a long-period RS CVn variable RS CVn systems are a new class of x-ray emitters.
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- February 1978
- Bibcode:
- 1978IAUC.3173....3W