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Fourth Epoch observations of SGR 1806-20

ATel #380; P. B. Cameron (Caltech) and S. R. Kulkarni (Caltech)
on 6 Jan 2005; 21:29 UT
Credential Certification: P. Brian Cameron (pbc@astro.caltech.edu)

Subjects: Radio, Neutron Star, Soft Gamma-ray Repeater, Transient, Variables, Pulsar


We observed a fourth epoch of the position of SGR 1806-20 with the Very Large Array (VLA) in A-configuration on 2005 Jan 6.77 UT (t ~ 9.9 days after the giant flare. See GCN #2920, #2928, #2929, #2933, #2934, #2935, ATEL #373, #375).
We find the following preliminary flux densities:

Freq.       Flux Density
(GHz)     (mJy)
===========================
1.46       96 +/- 2
4.86       39 +/- 2
8.46       24 +/- 1
===========================

Error Bars are 1 sigma. We find an angular size at 8.46 GHz of about 80 mas. We see no variation in this diameter over the last 4 days.

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