Cyclotron line in a ROSAT-discovered old isolated neutron star

Cyclotron line in a ROSAT-discovered old isolated neutron star


Proposal number : 116
Overvation program : CP
Subject category : Compact_Galactic
Proposal type : Standard
Principal Investigator : Neuhaeuser Ralph
PI Institute : Max-Planck-Institut Extraterrestrische Physik

Abstract

We propose a deep observation with the SAX LECS of a near-by
old isolated neutron star, recently discovered as counterpart
of a supersoft ROSAT source. This source has a 57 eV blackbody
spectrum and must be located at a distance of less than 120 pc,
because its column density is less than that of the R CrA
molecular cloud onto which the object is projected. The 0.1 to
10 keV energy range of LECS will provide the possibility to
obtain a good S/N spectrum in order to detect the cyclotron
resonance line and, hence, to estimate the magnetic field,
i.e. to prove that this object is a magnetized old neutron star.


List of Approved Targets


Target RA (2000) DEC (2000) Exposure (s) Priority
RXJ185635-3754 18 56 35.0 -37 54 32.0 35000A



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