Member spectra are sorted according to integration time stored in the
inst.settings attribute and merged into a single raw_spct
object with raw counts variables named counts_1, counts_2,
etc.
See also
Other spectral data-processing functions:
MAYP112785_tail_correction(),
MAYP11278_tail_correction(),
check_sn_match(),
linearize_counts(),
new_correction_method(),
ref_correction(),
trim_counts(),
uvb_corrections()
