Absolute photometric calibration of large aperture optical systems
A method of absolute calibration for the air shower fluorescence detectors of the Pierre Auger Observatory is presented, along with preliminary results from prototype equipment. A 2.5 m diameter light source uniformly illuminated by ultra-violet light emitting diodes is calibrated and mounted at the detector aperture. The resulting end-to-end measurement provides a 7% absolute photon calibration at a wavelength of 375 nm. © 2003 Elsevier B.V. All rights reserved.
Publication Source (Journal or Book title)
Brack, J., Meyhandan, R., Hofman, G., & Matthews, J. (2004). Absolute photometric calibration of large aperture optical systems. Astroparticle Physics, 20 (6), 653-659. https://doi.org/10.1016/j.astropartphys.2003.09.004