Status of the Transneptunian Automated Occultation Survey (TAOS II)

Matthew J. Lehner, Shiang Yu Wang, Mauricio Reyes-Ruíz, Zhi Wei Zhang, Liliana Figueroa, Chung Kai Huang, Wei Ling Yen, Charles Alcock, Fernando Alvarez Santana, Joel Castro-Chacón, Wen Ping Chen, You Hua Chu, Kem H. Cook, John C. Geary, Benjamín Hernández, Jennifer E. Karr, J. J. Kavelaars, Timothy Norton, Andrew Szentgyorgyi

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The Transneptunian Automated Occultation Survey (TAOS II) will aim to detect occultations of stars by small (∼1 km diameter) objects in the Kuiper Belt and beyond. Such events are very rare (< 10-3events per star per year) and short in duration (∼200 ms), so many stars must be monitored at a high readout cadence in order to detect events. TAOS II will operate three 1.3 meter telescopes at the Observatorio Astronomico Nacional at San Pedro Martir in Baja California, Mexico. With a 2.3 square degree field of view and a high speed camera comprising CMOS imagers, the survey will monitor 10,000 stars simultaneously with all three telescopes at a readout cadence of 20 Hz. Construction of the site began in the fall of 2013, and the survey will begin by the end of 2018. This paper describes the observing system and provides an update on the status of the survey infrastructure.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Telescopes VII
EditorsHeather K. Marshall, Jason Spyromilio
ISBN (Electronic)9781510619531
StatePublished - 2018
Externally publishedYes
EventGround-Based and Airborne Telescopes VII 2018 - Austin, United States
Duration: Jun 10 2018Jun 15 2018

Publication series

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


OtherGround-Based and Airborne Telescopes VII 2018
Country/TerritoryUnited States


  • Kuiper Belt Objects
  • San Pedro Mártir
  • Solar System
  • TAOS
  • Transneptunian Objects
  • high-speed imaging
  • occultations
  • telescope array

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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