EUV and Soft X-ray Observations of Gamma-Ray Burst Sources
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Session 4 -- Gamma Ray Astrophysics
Display presentation, Wednesday, January 12, 9:30-6:45, Salons I/II Room (Crystal Gateway)

[4.14] EUV and Soft X-ray Observations of Gamma-Ray Burst Sources

K. Hurley, P. Li (UCB SSL), J. Laros (LANL), G. Fishman, C. Kouveliotou (NASA-MSFC)

The 3rd Interplanetary Network of gamma-ray burst detectors has produced some of the smallest GRB error boxes ever available for deep counterpart searches. A 40 ksec EUVE observation of the March 25 1992 source region was carried out on August 25/6 1993. We have summed the spectral channels to use the three spectrometers as broad-band photometers, and achieve sensitivities in the $10^{-14} erg cm^{-2} s^{-1}$ range. We discuss the results of this search in a hitherto unexplored wavelength range. A 40 ksec ROSAT PSPC observation of the May 1 1992 source region is scheduled for October/November 1993. The error box of this GRB contains a weak ($10^{-13} erg cm^{- 2}s^{-1}$) X-ray source which was discovered in a 2700 s TOO observation. We will discuss the spectrum and variability of this source, and its possible relation to the burst source.

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