SIMBAD references

M. P. Rupen, V. Dhawan, and A. J. Mioduszewski, National Radio Astronomy Observatory; B. W. Stappers, University of Amsterdam and Stichting Astronomisch Onderzoek in Nederland; and B. M. Gaensler, Harvard-Smithsonian Center for Astrophysics, report the detection of radio emission associated with the recent outburst of the accreting millisecond pulsar SAX J1808.4-3658 (IAUC 7993): "Observations at 8.5 GHz with the Very Large Array (VLA) on Oct. 16.05 UT show a 0.44-mJy source (7 sigma) at R.A. = 18h08m27s.60 ± 0s.02, Decl. = -36o58'43".4 ± 0".4 (equinox 2000.0), consistent with the position reported by Gaensler et al. (1999, Ap.J. 522, L117) during the source's 1998 outburst. Data taken with the Australia Telescope Compact Array (ATCA) on Oct. 16.07-16.36 give a 3-sigma detection of 0.4 mJy at 8.5 GHz, suggesting that the source was not rapidly fading. VLA and ATCA observations at 4.9 GHz at the same epochs as above both give a marginal detection at a flux density of 0.3 ± 0.1 mJy, while ATCA observations on Oct. 16.05-16.38 provide an upper limit of 0.5 mJy (3 sigma) at 2.4 GHz at the detected position. Subsequent VLA observations on Oct. 17.98 at 8.5 GHz give a probable detection (based on positional agreement with the Oct. 16 data) at 0.3 mJy (4 sigma). Further radio observations are planned; we encourage continued optical and x-ray monitoring."