[vsnet-alert 4835] Re: Rare outburst of RXJ1450.5+6403

[Brian Skiff <bas@lowell.edu>]

     RXJ 1450.5+6403 = FBS 1449+642 from the Byurakan spectral survey of
blue stellar objects.  It is listed with a spectral type of B1 (!).  The
USNO-A2.0 'b-r' color is -0.5, so this is definitely a blue object.
     Looking at the calibration situation:  two sequences appearing on the
same POSS-I plate indicate that USNO-A2.0 red magnitudes are offset by -0.5
mag. from standard Cousins R.  Thus to adjust to R, _add_ 0.5 mag. to
magnitudes obtained differentially from USNO-A2.0 red magnitudes.
     Nice find, Tonny!

\Brian

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