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Re: IGR J16318-4848 optical detection > A clear optical source was detected on those images at a constant > brightness as measured against UCAC1 magnitudes of nearby stars. > > IGR J16318-4848 20030204.08 17.3CR > IGR J16318-4848 20030208.10 17.3CR This object is a bright object in 2MASS. Since the object lacks a clear signature of brightening, the identity with the X-ray transient is still unclear. Being atypical for an optical countertpart of an X-ray transient, the object may be a mere superimposed red star. We probably need spectroscopy for clarification. Anyway keep observing. Regards, Taichi Kato
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