TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2939 SUBJECT: SGR 1806-20: Low frequency GMRT results; submission to GCN circulars DATE: 05/01/06 15:16:20 GMT FROM: Poonam Chandra at Tata Inst. Fund.Res. SGR 1806-20: Low frequency GMRT results P. Chandra (Tata Institute of Fundamental Research (TIFR), Mumbai), reports the detection of radio emission from the soft gamma-ray repeater SGR 1806-20 with the Giant Metrewave Radio Telescope (GMRT) in the 610/235 MHz bands for 1.16 hours on 2005 Jan. 04 (mean epoch approximately 0949 UT). The preliminary flux densites for 2005-Jan-04.409 were: 608 MHz: 198.9 (11.9) mJy 240 MHz: 242.6 (14.9) mJy The last digits in the brackets indicate 1 sigma error bars. She notes that the power law index beween the two frequencies is: -0.21 (0.09). This index is substantially flatter than the corresponding power law index reported in the higher frequency VLA observation on 2005 Jan 4.59 UT by Cameron and Kulkarni (GCN 2934) (alpha = -0.74 at 1.4 GHz) or -0.61 (0.06) reported by Gaensler et al at the same time (GCN 2933). Further observations with the GMRT at other low frequencies are also planned. [GCN OPS NOTE (06Jan05): This Circular was delayed by 3 hours until the submitor could be added to the list.]