TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5250 SUBJECT: BAT Trigger #214277 is SGR 1900+14 DATE: 06/06/10 22:09:04 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift J. R. Cummings (NASA/ORAU), G. Cusumano (INAF-IASFPA), V. La Parola (INAF-IASFPA), K. M. McLean (LANL/UTD), T. Mineo (INAF-IASFPA), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU) and E. Troja (INAF-IASFPA) report on behalf of the Swift Team: At 06:53:01 UT, the Swift Burst Alert Telescope (BAT) triggered and located a short soft burst (trigger=214277). Swift slewed immediately to the source. The BAT on-board calculated location is RA,Dec 286.791, +9.323 {19h 07m 10s, +09d 19' 22"} (J2000) with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single weak peak with a duration of < 0.032 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger. As stated in the GCN Notice corresponding to this trigger, the source is coincident with SGR 1900+14. The short, soft emission is completely consistent with the previous characteristics of the SGR. This is the first BAT onboard detection of this source since 2006-04-14. The XRT began taking data at 06:54:50 UT, 110 seconds after the BAT trigger. XRT PC data of the first orbit (exposure 2264.7 s) shows a source at the SGR position with a constant rate of (5.8+/-0.5)E-2 c/s consistent with the quiescent state of the source. The source rate corresponds to an unabsorbed (0.2-10 keV) flux of (2.0+/-0.2)E-11 erg cm**-2 s**-1.