TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2943 SUBJECT: Further VLA observations of SGR 1806-20 DATE: 05/01/07 22:09:14 GMT FROM: Bryan Gaensler at Harvard-Smithsonian/CfA B. M. Gaensler (CfA), G. Taylor (NRAO), J. Gelfand (CfA), C. Kouveliotou NASA/MSFC, NSSTC), R. Wijers (U. Amsterdam), M. Garrett (JIVE), G. Taylor (NRAO), M. McLaughlin (Jodrell Bank), R. Fender (U. Southampton), K. Newton-McGee (U. Sydney) report on behalf of a larger team: We observed the soft gamma-ray repeater SGR 1806-20 with the Very Large Array (VLA) in its A configuration on 2005, January 7, UT 2100-2200. Preliminary flux levels at epoch Jan 07.90 are as follows (the numbers in parentheses indicate 1 sigma errors in the last significant figure): Frequency Flux (Jan 07.90) (GHz) (mJy) --------- ------------ 1.4 75(5) 4.8 28(1) 8.6 17(1) The spectrum is consistent with a single power law over this range of spectral index -0.81+/-0.05, significantly steeper than when the radio source was first detected on 2005 Jan 3 (GCN #2928, #2929, $2930).