Radio upper limits for SAX J1808.4-3658
ATel #513; S. Migliari (Amsterdam), R. Sault (ATNF), E. Gallo (Amsterdam), R. Fender (Southamton), R. Wijnands, M. van der Klis (Amsterdam)
on 7 Jun 2005; 10:23 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Marc Klein-Wolt (klein@science.uva.nl)
Subjects: Radio, Optical, X-ray, Binary, Neutron Star, Transient
The accreting millisecond X-ray pulsar SAX J1808.4-3658 has been observed
in the radio band with the Australia Telescope Compact Array (ATCA) on
2005 June 4th (20:37 - 21:49 UT), during the rise of its current X-ray
outburst (ATEL #505, #507). The X-ray and optical flux (ATEL #511) were
still rising during the observations. The radio-counterpart was not
detected with a flux density rms=0.22 mJy at 4.8 GHz and rms=0.30 mJy at
8.6 GHz. These upper limits are consistent with the Very Large Array
(VLA) non-detections at 8.6 GHz on June 2nd (ATEL #506).
The Australia Telescope is funded by the Commonwealth of Australia for
operation as a National Facility menaged by CSIRO.
