Definition of the characteristic flags

Option: 0 (0=show all flags, x=hexadecimal)

1 Not main sample target (NOT_MAIN)
2 Commissioning observation (COMMISSIONING)
4 Telluric target (TELLURIC)
8 APO/NMSU 1m observation (APO1M)
16 Non-primary (not highest S/N) duplicate (DUPLICATE)