Previous abstract Next abstract

Session 43 - Source Surveys.
Display session, Wednesday, June 11
South Main Hall,

[43.09] RXTE ASM and IPN Precise Position of BATSE Burst 5428

D. A. Smith (MIT), J. G. Jernigan, K. C. Hurley (UCB), H. V. Bradt, A. M. Levine, R. A. Remillard (MIT), G. J. Fishman, C. Kouveliotou, C. A. Meegan (MSFC/NASA)

The gamma-ray burst BATSE #5428 which occurred on 16 Apr. 1996 at 0409 UT was fortuitously observed in progress by two of the shadow cameras of the All-Sky Monitor (ASM) on the Rossi X-ray Timing Explorer (RXTE). In each camera, the burst was detected at \sim240 \pm 13 mCrab (2 - 12 keV) averaged over the 90-s exposure. The ASM data yield crossed lines of position with a preliminary joint position of 4h 15.4m\pm0.7m, +77\arcdeg 09.8\arcmin \pm 1.5\arcmin (J2000). Systematic errors are believed to be \lesssim 1.5\arcmin. This position is consistent with both the BATSE position and the Ulysses/BATSE IPN annulus. The BATSE, Ulysses, and ASM time-series data all show a double-peaked profile. No X-ray flux from this position was detected during subsequent 90-s exposures over the next 23 hours, to a 1-\sigma upper limit of \sim13 mCrab. The earliest of these exposures began 85 s after the initial BATSE burst trigger. The POSS E plate shows many stellar objects and a single galaxy at \lesssim 20 mag. within the preliminary ASM error region reported here.

The author(s) of this abstract have provided an email address for comments about the abstract:

Program listing for Wednesday