Flat /raid/aavsonet/bsm_tx/200927/FlatB.fits Flat /raid/aavsonet/bsm_tx/200927/FlatC.fits Flat /raid/aavsonet/bsm_tx/200927/FlatI.fits Flat /raid/aavsonet/bsm_tx/200927/FlatR.fits Flat /raid/aavsonet/bsm_tx/200927/FlatV.fits