Flat /raid/aavsonet/bsm_tx/200727/FlatB.fits Flat /raid/aavsonet/bsm_tx/200727/FlatC.fits Flat /raid/aavsonet/bsm_tx/200727/FlatI.fits Flat /raid/aavsonet/bsm_tx/200727/FlatR.fits Flat /raid/aavsonet/bsm_tx/200727/FlatV.fits