Radio Observations of RS Oph: Past the First Peak?
ATel #750; G. G. Pooley (MRAO Cambridge), J. L. Sokoloski (CfA), M. P. Rupen, A. J. Mioduszewski (NRAO)
on 27 Feb 2006; 15:50 UT
Credential Certification: Michael P. Rupen (mrupen@nrao.edu)
Subjects: Radio, Binary, Cataclysmic Variable, Nova, Star, Transient, Variables
Radio observations of the symbiotic recurrent nova RS Oph made with the Ryle
Telescope at Cambridge at 15.2 GHz give the following:
- Feb 24, 06:30 - 08:40 UT: 37.4 mJy
- Feb 26, 09:54 - 11:40 UT: 33.9 mJy
- Feb 27, 09:20 - 10:31 UT: 30.3 mJy
This is a low elevation source for the Ryle Telescope, and these flux
densities are correspondingly uncertain, at about the 15% level. Still it
seems clear that RS Oph has brightened considerably since the VLA
measurement on Feb. 17.5 (23.2 +/- 0.6 mJy at 15 GHz; Eyres et al., IAU
Circular 8678), consistent with the 6 GHz rise seen with MERLIN (ibid).
The source is clearly not continuing to brighten at the same rate, and may be
past its first peak. Further observations are on-going.
The National Radio Astronomy Observatory is a facility of the National
Science Foundation operated under cooperative agreement by Associated
Universities, Inc.
