Study 000323:

ACRONYM: Fe9_Offlimb

This is a long exposure, large raster intended for measuring the
temperature in coronal holes off-limb using the Fe IX 197.86/171.07
ratio. Other diagnostic lines are also obtained (Si VIII, Fe X).

TARGET: Off-limb coronal holes
EXPOSURE TIME: 100s
RASTER: scanning
SLIT: 2"
STEP SIZE: 2"
FOV: 200"x400"
DURATION: 3 hours
VOLUME: 100 Mbits

Pointing:
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Large, polar coronal hole, off-limb, the slit should be placed from 30”
inside the limb to 370” outside the limb

Instruction to planners:
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run following studies:
PRY_slot_context_v2 (3min, 4Mbit)
Fe9_Offlimb (3 hrs, 100Mbit)
PRY_slot_context_v2 (3min, 4Mbit)

* No specific support is requested for SOT
* XRT should run deep exposures in a wide range of filters to provide
temperature measurements. 

Warning:
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None