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Lo: CG Map Normalizing 'energy_sc' #2541

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Lo: CG Map Normalizing 'energy_sc' #2541

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55c9def
Lo: Now taking an exposure weighted average of energy_sc when project…
Dec 26, 2025
75fddb5
Converting keV to eV when calling cg correction in lo_l2
Dec 30, 2025
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10 changes: 8 additions & 2 deletions imap_processing/lo/l2/lo_l2.py
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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,10 @@ def lo_l2(

logger.info("Step 3: Converting to dataset and adding geometric factors")
dataset = sky_map.to_dataset()

if cg_correction:
dataset["energy_sc"] /= dataset["exposure_factor"]

dataset = add_geometric_factors(dataset, map_descriptor.species)

logger.info("Step 4: Calculating rates and intensities")
Expand Down Expand Up @@ -394,6 +398,8 @@ def process_single_pset(
pset_processed, energy_values_ev
)

pset_processed["energy_sc"] *= pset_processed["exposure_factor"]

# Always calculate ram-mask to identify ram/anti-ram bins
pset_processed = calculate_ram_mask(pset_processed)

Expand Down Expand Up @@ -869,8 +875,8 @@ def calculate_all_rates_and_intensities(
logger.info("Interpolating map intensities to helio-frame energies")
dataset = interpolate_map_flux_to_helio_frame(
dataset,
dataset["energy"],
dataset["energy"],
dataset["energy"] * 1000,
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@subagonsouth subagonsouth Dec 30, 2025

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I think that the documentation for interpolate_map_flux_to_helio_frame is wrong when it says that input energies must be in units of eV. It really just matters that the two inputs (esa_energy and hf_energy) are in the same units. This is because all the equations use ratios of energies so as long as the units are the same, it should produce the same results.

dataset["energy"] * 1000,
["ena_intensity", "bg_intensity"],
)

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