Flat /raid/aavsonet/bsm_tx/200928/FlatB.fits
Flat /raid/aavsonet/bsm_tx/200928/FlatC.fits
Flat /raid/aavsonet/bsm_tx/200928/FlatI.fits
Flat /raid/aavsonet/bsm_tx/200928/FlatR.fits
Flat /raid/aavsonet/bsm_tx/200928/FlatV.fits