Soft Gamma Repeater 1814-13

The RXTE All Sky Monitor has detected an extremely bright and short event (which shut it off) on Sep. 12, 1997. This event was classified by the BATSE team as a soft gamma-ray repeater event. Comparison with two detections of June 29 suggests that after 15 years a fourth SGR has been found.

Previous IAU Circulars

• IAUC 6743 Ulysses/KONUS/Wind location; BATSE details, ASM location of the Sep. 12, 1997 event
  
• IAUC 6744 strong infrared source (= IRAS 18119-1342) within IPN error box

• The intersection of the triangulation rings of the three events are at the following coordinates (equinox 2000.0): R.A. = 18h14m50s, Decl. = -13o36'.6; 18h14m25s, -14o01'.7; 18h15m26s, -13o15'.0; 18h15m02s, -13o39'.8." The ASM localization is a long error box with corners at R.A. = 18h25m39s.0, Decl. = -14o51'48"; 18h25m42s.6, -14o48'50"; 18h34m24s.9, -15o28'10"; 18h34m04s.5, -15o23'31" (equinox 2000.0). However, the determination of the ends of the error box along the long direction is subject to systematic errors of about 2 deg. The combined IPN/ASM error box is centered at R.A. = 18h14m.7, Decl. = -13o40' and has a radius (90-percent confidence) of 5' (IAUC 6743).
• Scetch of the relative locations of boxes according to IAUC 6743: the small red circle is the combined IPN/ASM location with 5' error radius.
  
• Note that the combined IPN/ASM location as given in IAUC 6743 (red circle in the above scetch) is wrong! The correct intersection of the RXTE error box with the IPN location is given below (courtesy Don Smith):