TITLE: GCN GRB OBSERVATION REPORT NUMBER: 116 SUBJECT: SGR1627-41, RXTE/ASM observations DATE: 98/06/19 17:20:20 GMT FROM: Don Smith at MIT D. A. Smith and A. M. Levine, on behalf of the RXTE/ASM teams at MIT and NASA/GSFC, report: "Although the ASM did not observe any of the BATSE-detected events from SGR 1627-41, during the interval from Jun 15 to Jun 19, three short (<~1 s) burst events were detected in SSC 3 at May 17.943917, 17.954243, and 18.010803 (UTC). During the first event, the original BATSE location (GCN 107) was outside the FOV of the ASM. The full width of the FOV of SSC 3 during the first event restricts the range of declination values along the IPN annulus (GCN 115) between -44.4 and -56.4 degrees. This is fully consistent with the revised BATSE position reported in GCN 113. Due to low signal-to-noise, our standard cross-correlation technique was unable to isolate these events in our position data, but given the IPN annulus, we were able to search along it for a best-fit location. We find a minimum reduced chi-squared at R.A. = 16h35m50s, Decl.= -47o32' for event 1 and R.A. = 16h35m50s, Decl.= -47o39' for event 2 (1-sigma error of 4' in Decl. in both cases). Both positions are consistent with the location of the SNR (g337.0-0.1) mentioned in GCN 113. If we assume these bursts are coming from SNR G337.0-0.1, we can use its location to measure the burst fluxes: Event Fluence Peak Flux (2-12 keV) (10^{-7} erg/cm^2) (10^{-7} erg/cm^2/s) 1.5-3 3-5 5-12 kev (1-s averages) 1 <0.6 <0.4 2.1 (+- 0.3) 1.1 2 <0.8 <0.4 2.9 (+- 0.5) 2.8 Upper limits are 2-sigma. We do not yet have pointing information for the observation of the third burst."