SIMBAD references

2002ApJ...579L..29K - Astrophys. J., 579, L29-L32 (2002/November-1)

A probable optical counterpart to the isolated neutron star RX J1308.6+2127.

KAPLAN D.L., KULKARNI S.R. and VAN KERKWIJK M.H.

Abstract (from CDS):

Using a very deep observation from the Hubble Space Telescope Space Telescope Imaging Spectrometer, we have searched for an optical counterpart to the nearby radio-quiet isolated neutron star RX J1308.6+2127 (RBS 1223). We have identified a single object in the 90% Chandra error circle that we believe to be the optical counterpart. This object has m50CCD=28.56±0.13 mag, which translates approximately to an unabsorbed flux of Fλ=(1.7±0.3)x10–20 ergs.s–1.cm–2 Å –1 at 5150 Å or an X-ray-to-optical flux ratio of log(fX/fopt)=4.9. This flux is a factor of ~5 above the extrapolation of the blackbody fit to the X-ray spectrum, consistent with the optical spectra of other isolated neutron stars. Without color information, we cannot conclude that this source is indeed the counterpart to RX J1308.6+2127. If not, then the counterpart must have m50CCD>29.6 mag, corresponding to a flux that is barely consistent with the extrapolation of the blackbody fit to the X-ray spectrum.

Abstract Copyright:

Journal keyword(s): Stars: Pulsars: Individual: Alphanumeric: RX J1308.6+2127 - Stars: Neutron - X-Rays: Stars

Nomenclature: Fig.2: [KKV2002] A (Nos A, B, X).

Simbad objects: 16

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