[vsnet-chat 1900] Re: Microlensing candidates?

[Taichi Kato <tkato>]

Re: [vsnet-chat 1899] Microlensing candidates?

    The parameters for macrolensing candidates are obtained by fitting
the light curve (alerts are usually issued on the rising branch) using
a model lensing light curve.  By extrapolating the model light curve,
one can obtain the expected time of maximum (T Max, in JD), and maximum
amplification (A Max).  D mag is maximum amplification amplitude in
magnitude.  Tau is something like an event duration.  I0 is the usual
magnitude of the amplified object.  So you may get I0-A max to obtain
the expected maximum magnitude in I band.  Some of OGLE microlensing
candidates are expected to reach I mag brighter than 12, so there is
a good possibility of visually detecting the brightening.  This is the
reason why some observers have been following OGLE 1999 BUL 16, which,
in initial alert, was expected to brighten to I=7.

Regards,
Taichi Kato

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