KDP as a thermal blocking filter -- Deep near IR observations with a warm narrow band filter

J. K. M. Viuho, A. A. Djupvik, A. N. Sørensen +5

Ground-based astronomy suffers from strong atmospheric line- and thermal continuum emission, at the near infrared (NIR, 0.7-1.1$\mu$m), and short-wave infrared (SWIR, 1.1-2.5$\mu$m) wa…