Flat /raid/aavsonet/bsm_tx/200520/FlatB.fits Flat /raid/aavsonet/bsm_tx/200520/FlatC.fits Flat /raid/aavsonet/bsm_tx/200520/FlatI.fits Flat /raid/aavsonet/bsm_tx/200520/FlatR.fits Flat /raid/aavsonet/bsm_tx/200520/FlatV.fits