Herschel filter transmission curves for HostPhot.

Source: SVO Filter Profile Service, downloaded 2026-04-16.
Wavelength unit: Angstrom.
Transmission: dimensionless.

HostPhot filter -> SVO filter ID
PACS100  -> Herschel/Pacs.green
PACS160  -> Herschel/Pacs.red
SPIRE250 -> Herschel/SPIRE.PSW_ext
SPIRE350 -> Herschel/SPIRE.PMW_ext
SPIRE500 -> Herschel/SPIRE.PLW_ext

The SPIRE curves use the extended-source filter profiles because the downloader
selects extended-source SPIRE maps by default.
