Design of the ULTRASAT UV camera

Arooj Asif, Merlin Barschke, Benjamin Bastian-Querner, David Berge, Rolf Buhler, Nicola De Simone, Gianluca Giavitto, Juan M. Haces Crespo, Nirmal Kaipachery, Marek Kowalski, Shrinivasrao R. Kulkarni, Daniel Kusters, Sebastian Philipp, Heike Prokoph, Julian Schliwinski, Mikhail Vasilev, Jason J. Watson, Steven Worm, Francesco Zappon, Shay AlfassiSagi Ben-Ami, Adi Birman, Kasey Boggs, Greg Bredthauer, Amos Fenigstein, Avishay Gal-Yam, Dmitri Ivanov, Omer Katz, Ofer Lapid, Tuvia Liran, Ehud Netzer, Eran O. Ofek, Shirly Regev, Yossi Shvartzvald, Joseph Tufts, Dmitry Veinger, Eli Waxman

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations


The Ultraviolet Transient Astronomical Satellite (ULTRASAT) is a scientific UV space telescope that will operate in geostationary orbit. The mission, targeted to launch in 2024, is led by the Weizmann Institute of Science (WIS) in Israel and the Israel Space Agency (ISA). Deutsches Elektronen Synchrotron (DESY) in Germany is tasked with the development of the UV-sensitive camera at the heart of the telescope. The cameras total sensitive area of ≈90mm x 90mm is built up by four back-side illuminated CMOS sensors, which image a field of view of ≈200 deg2. Each sensor has 22:4 megapixels. The Schmidt design of the telescope locates the detector inside the optical path, limiting the overall size of the assembly. As a result, the readout electronics is located in a remote unit outside the telescope. The short focal length of the telescope requires an accurate positioning of the sensors within ±50 μm along the optical axis, with a flatness of ±10 μm. While the telescope will be at around 295K during operations, the sensors are required to be cooled to 200K for dark current reduction. At the same time, the ability to heat the sensors to 343K is required for decontamination. In this paper, we present the preliminary design of the UV sensitive ULTRASAT camera.

Original languageEnglish
Title of host publicationUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXII
EditorsOswald H. Siegmund
ISBN (Electronic)9781510644809
StatePublished - 2021
Externally publishedYes
EventUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXII 2021 - San Diego, United States
Duration: 1 Aug 20215 Aug 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXII 2021
Country/TerritoryUnited States
CitySan Diego

Bibliographical note

Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.


  • CMOS
  • Ultraviolet
  • gravitational waves
  • mosaic assembly
  • satellite
  • space telescope
  • super novae
  • survey
  • wide-field camera


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