Transient radio emisison from SAX J1808.4-3658

Details Transient radio emisison from SAX J1808.4-3658 Transient radio emisison from SAX J1808.4-3658

1999-07-08

arxiv.org/abs/astro-ph/9907111v1

Astronomy and Astrophysics

Astrophysics

6 pages, uses emulateapj.sty, one embedded PS figure. Accepted to ApJ Letters

Scientific paper

10.1086/312238

We report on the detection of radio emission from the accretion-powered X-ray millisecond pulsar SAX J1808.4-3658, using the Australia Telescope Compact Array. We detected a ~0.8 mJy source at the position of SAX J1808.4-3658 on 1998 April 27, approximately one day after the onset of a rapid decline in the X-ray flux; no such source was seen on the previous day. We consider this emission to be related to the radio emission from other X-ray binaries, and is most likely associated with an ejection of material from the system. No radio emission was detected at later epochs, indicating that if SAX J1808.4-3658 is a radio pulsar during X-ray quiescence then its monochromatic luminosity must be less than L(1.4 GHz) ~6 mJy/kpc^2.

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