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   PR # 42039
   RXJ185635-3754 is a bright soft source projected on the R CrA
   molecular cloud. It is a 57 eV black body at a distance <120pc, with
   an emitting area of 480 sq km. It is likely to be a isolated old
   neutron star. If it is magnetized, then theory predicts the existence
   of cyclotron line emission in the 6-15 keV regime. We propose an ASCA
   observation to search for this hard X-ray emission. Detection of the
   line provides confirmation that the source is an isolated neutron
   star accreting from the interstellar medium. Absence of a cyclotron
   line demonstrates that either the magnetic field is less than 10^12G
   or the star is not accreting. The SIS spectrum of the soft black body
   tail will be used to search for deviations from the pure black body
   predicted for accreting low luminosity neutron stars.
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