Footnote_1:

Here's how I pset ardlib (sh syntax):

qeard=./Ard/acisD1997-04-17qeN0004.fits

pset ardlib AXAF_ACIS0_QE_FILE=${qeard}"[AXAF_QE1]"
pset ardlib AXAF_ACIS1_QE_FILE=${qeard}"[AXAF_QE2]"
pset ardlib AXAF_ACIS2_QE_FILE=${qeard}"[AXAF_QE3]"
pset ardlib AXAF_ACIS3_QE_FILE=${qeard}"[AXAF_QE4]"
pset ardlib AXAF_ACIS4_QE_FILE=${qeard}"[AXAF_QE5]"
pset ardlib AXAF_ACIS5_QE_FILE=${qeard}"[AXAF_QE6]"
pset ardlib AXAF_ACIS6_QE_FILE=${qeard}"[AXAF_QE7]"
pset ardlib AXAF_ACIS7_QE_FILE=${qeard}"[AXAF_QE8]"
pset ardlib AXAF_ACIS8_QE_FILE=${qeard}"[AXAF_QE9]"
pset ardlib AXAF_ACIS9_QE_FILE=${qeard}"[AXAF_QE10]"