Flat /raid/aavsonet/bsm_tx/200428/FlatB.fits Flat /raid/aavsonet/bsm_tx/200428/FlatC.fits Flat /raid/aavsonet/bsm_tx/200428/FlatI.fits Flat /raid/aavsonet/bsm_tx/200428/FlatR.fits Flat /raid/aavsonet/bsm_tx/200428/FlatV.fits