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Given the recent successful launch of the James Webb Space Telescope,determining robust calibrations of the slopes and absolute magnitudes of thenear- to mid-infrared Tip of the Red Giant Branch (TRGB) will be essential tomeasuring precise extragalactic distances via this method. Using ground-baseddata of the Large Magellanic Cloud from the Magellanic Clouds PhotometricSurvey along with near-infrared (NIR) data from 2MASS and mid-infrared (MIR)data collected as a part of the SAGE survey using the Spitzer Space Telescope,we present slopes and zero-points for the TRGB in the optical (VI), NIR (JHK)and MIR ([3.6] & [4.5]) bandpasses. These calibrations utilize stars +0.3 +/-0.1 mag below the tip, providing a substantial statistical improvement overprevious calibrations which only used the sample of stars narrowly encompassingthe tip.

Astrophysical Distance Scale VII: A Self-Consistent, Multi-Wavelength  Calibration of the Slopes and Relative Zero Points for the Run of Luminosity  with Color of Stars Defining the Tip of the Red Giant Branch