RS Ophiuchi
Abstract
F. A. Cordova, Los Alamos National Laboratory; K. O. Mason, Mullard Space Science Laboratory; M. F. Bode, Manchester University; and P. Barr, EXOSAT Observatory, telex: "We have detected intense x-ray emission from RS Oph using the EXOSAT Observatory. This symbiotic nova is now declining from an outburst that commenced on Jan. 26 (IAUC 4030, 4031, 4036). EXOSAT observed RS Oph between 18h00 and 23h00 UT on Mar. 22. Preliminary analysis indicates that the x-ray spectrum is soft and absorbed. Fits to a thermal bremsstrahlung model yield a temperature of 0.75 keV and an absorbing column density of ~ 10**21 atoms cm**-2. The flux at Earth in the 0.1-6.0-keV band is estimated to be 4 x 10**-10 erg cm-**2 s**-1. Further EXOSAT observations are planned to monitor the decline of the outburst." Visual magnitude estimate by J. E. Bortle, Stormville, NY: Mar. 16.416 UT, 9.6.
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- March 1985
- Bibcode:
- 1985IAUC.4049....3C