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Radio observations of Aql X-1

ATel #491; M. P. Rupen (NRAO/GSFC), A. J. Mioduszewski, V. Dhawan (NRAO)
on 12 May 2005; 16:07 UT
Credential Certification: Michael P. Rupen (mrupen@nrao.edu)

Subjects: Radio, X-ray, Binary, Neutron Star, Transient

Referred to by ATel #: 660, 2000

Observations with the Very Large Array (VLA) during the recent X-ray outburst of Aql X-1 (ATEL #450, ATEL #452, ATEL #464) give the following nominal flux densities at 4.86 GHz:

  • 5apr05 (MJD 53465.55): 0.07 +/- 0.06 mJy/beam
  • 12apr05 (MJD 53472.51): 0.27 +/- 0.06 mJy/beam
  • 4may05 (MJD 53494.52): 0.03 +/- 0.05 mJy/beam
The possible detection on 12apr05 would be somewhat surprising, given that the spectrum had softened significantly by that time (ATEL #464).

Further VLA observations are planned.

The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.