Due to performance issues with the cooling system for the ZTF Camera, the Zwicky Transient Facility (ZTF; Bellm et al. 2019; Graham et al. 2019) announces that the ZTF Camera on the Palomar 48-inch Samuel Oschin Telescope has been brought back to the Caltech campus for maintenance. As a result, the public ZTF Northern Sky Survey will be out of operation until no later than mid-January 2022.
The ZTF Bright Transient Survey (BTS; Fremling et al. 2019, Perley et al. 2019) will continue to send public classifications and spectra of bright transients to TNS using SEDM (Blagorodnova et al. 2018; Rigault et al. 2019) on the Palomar 60-inch telescope. Bright (<18.5 mag) transient candidates will, during the ZTF downtime, be selected from candidates reported to TNS by other surveys.
ZTF is a public-private partnership, with equal support from the ZTF Partnership and from the U.S. National Science Foundation through the Mid-Scale Innovations Program (MSIP). The ZTF partnership is a consortium of the following universities and institutions (listed in descending longitude): TANGO Consortium of Taiwan; Weizmann Institute of Sciences, Israel; Oskar Klein Center, Stockholm University, Sweden; Deutsches Elektronen-Synchrotron & Humboldt University, Germany; Ruhr University, Germany; Institut national de physique nucléaire et de physique des particules, France; University of Warwick, UK; Trinity College, Dublin, Ireland; University of Maryland, College Park, USA; Northwestern University, Evanston, USA; University of Wisconsin, Milwaukee, USA; Lawrence Livermore National Laboratory, USA; IPAC, Caltech, USA; Caltech, USA. Operations are conducted by COO, IPAC, and UW. Alert distribution service provided by DIRAC@UW. SED Machine is based upon work supported by the National Science Foundation under Grant No. 1106171. Alert filtering provided by the Fritz marshal, which is funded by the Moore Foundation, Heising Simons Foundation, National Science Foundation, NASA and the Packard Foundation.
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