The IAU recommended photometric system for ultraviolet astronomy

Abstract In the current era when access to space is becoming easier and at a lower cost thanks standardised cubesat technology, numerous missions are expected be launched observe, particularly, ultraviolet wavelengths. Given reduced dimensions of telescope that can carry, most these will focused on photometric surveys sample targets interest, therefore each mission define their own bands according scientific objectives orbital constraints. However, in order provide coherent view sky, data should post-processed under common framework. 2017, IAU working group astronomy identified need such framework for upcoming missions, coordinated definition standard set could serve homogenizing future data. This paper presents procedure adopted by system, was approved during General Assembly Business Sessions held August, 2021. The system consists seven bands, denoted as UV1-UV7, all included range 115 - 400 nm. Some based existing filters, while others have been defined theoretical with constant throughput. regarded synthetic post-processing any mission, an example its application SPARCS also included. publicly available downloaded from https://www.nuva.eu/uv-photometry/ .