TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2994 SUBJECT: SGR 1806-20: low frequency GMRT results of 2005 Jan 16. DATE: 05/01/28 18:25:21 GMT FROM: Poonam Chandra at Tata Inst. Fund.Res. SGR 1806-20: low frequency GMRT results of 2005 Jan 16. P. Chandra, D. V. Lal, and C. H. Ishwara-Chandra on behalf of GMRT observatory report the detection of radio emission from the SGR 1806-20 with the Giant Metrewave Radio Telescope (GMRT) observed on 16 Jan 2005 at the following frequencies: 240 MHz (Jan 16.25 UT): 96.1 +/- 22.5 mJy 608 MHz (Jan 16.25 UT): 30.7 +/- 5.0 mJy 1060 MHz (Jan 16.37 UT): 19.9 +/- 1.6 mJy The values quoted here are after subtracting the nearby extended emission contribution from the SGR 1806-20 and modifying the flux densities with a Tsys correction factor of 3.87, 1.93 and 1.59 for 240, 608 and 1067 MHz frequencies respectively. Tsys correction is needed because, within the galactic plane the Tsys is dominated by Tsky, which is proportional to Tsys-towards-SGR and the Tsys-towards-Flux Cal.