urn:nasa:pds:context:instrument:orm.int2m54.ids 1.3 1.25.0.0 Product_Context 2026-07-07 1.3 Removed duplicate Internal_Reference entries from Reference_List. 2025-12-24 1.2 Updated schema version. Adding missing "telescope" references. 2025-01-02 1.1 Updated schema version. Adding missing "telescope" references. Update instrument type/subtype to use valid CTLI LDD. 2021-09-22 1.0 Initial export from OLAF urn:nasa:pds:context:telescope:orm.int2m54 instrument_to_telescope Intermediate Dispersion Spectrograph (IDS) Camera Spectrometer Intermediate Dispersion Spectrograph (IDS) of the 2.5m Isaac Newton Telescope is a long-slit spectrograph. Two 4096x2048 CCD detectors are available, the red-sensitive RED+2 and blue-sensitive EEV10. 16 gratings are also available. Possible grating and CCD combinations allow dispersions between 0.24 and 4 √Ö per pixel. The spatial scale is 0.4 and 0.44 arcsec per pixel for EEV10 and RED+2 detector, respectively. The full unvignetted slit length is 3.3 arcmin.