Flat /raid/aavsonet/bsm_tx/200926/FlatB.fits Flat /raid/aavsonet/bsm_tx/200926/FlatC.fits Flat /raid/aavsonet/bsm_tx/200926/FlatI.fits Flat /raid/aavsonet/bsm_tx/200926/FlatR.fits Flat /raid/aavsonet/bsm_tx/200926/FlatV.fits