Flat /raid/aavsonet/bsm_tx/200719/FlatB.fits Flat /raid/aavsonet/bsm_tx/200719/FlatC.fits Flat /raid/aavsonet/bsm_tx/200719/FlatI.fits Flat /raid/aavsonet/bsm_tx/200719/FlatR.fits Flat /raid/aavsonet/bsm_tx/200719/FlatV.fits