Flat /raid/aavsonet/bsm_tx/200923/FlatB.fits Flat /raid/aavsonet/bsm_tx/200923/FlatC.fits Flat /raid/aavsonet/bsm_tx/200923/FlatI.fits Flat /raid/aavsonet/bsm_tx/200923/FlatR.fits Flat /raid/aavsonet/bsm_tx/200923/FlatV.fits