Parameters for the long BL selection correction of the effective area
relatively to the BLMIN and BLMAX values.  
Function: COST+AESP*EXP(-(E-ENER)/TAU). Version 1996-Dec-17 (1.0)
BLMIN     BLMAX      ENER    COST      AESP      TAU 
 25         55       4.78    0.9300    0.02749   2.3672