Flat /raid/aavsonet/bsm_tx/200818/FlatB.fits Flat /raid/aavsonet/bsm_tx/200818/FlatC.fits Flat /raid/aavsonet/bsm_tx/200818/FlatI.fits Flat /raid/aavsonet/bsm_tx/200818/FlatR.fits Flat /raid/aavsonet/bsm_tx/200818/FlatV.fits