David Alexander Kann, a former researcher at IAA-CSIC and common user of the Calar Alto telescopes, has passed away on March 10th, 2023. He will be dearly missed by her/his many colleagues at the observatory and all over the world.
Dr. Kann was an expert in the field of transient phenomena (gamma ray bursts, kilonovae, ...) with hundreds of publications based on multi-wavelength data taken at many ground- and space-based facilities.
Alex was also an expert in cats and heavy metal music. One of his closest collaborators describes him as "an impressive astronomer" and "the sweetest person I've ever met".
Rest in peace, Alex.