Статья

The Zwicky Transient Facility: Data Processing, Products, and Archive

Frank J. MasciIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Russ R. LaherIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USABen RusholmeIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]D. L. ShupeIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Steven L. GroomIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]J. SuraceIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Edward JacksonIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]S. MonkewitzIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]R. BeckIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]David FlynnIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Scott TerekIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Walter LandryIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Eugean HacopiansIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Vandana DesaiIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Justin HowellIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]T. Y. BrookeIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]D. ImelIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Stefanie WachterCarnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101, USAQuanzhi YeDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAHsing Wen LinDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAS. B. CenkoAstrophysics Science Division, NASA/Goddard Space Flight Center, MC 661, Greenbelt, MD 20771, USAVirginia CunninghamDepartment of Astronomy, University of Maryland, Stadium Drive, College Park, MD 20742, USAU. D. RebbapragadaJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USABrian BueJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USAAdam A. MillerCenter for Interdisciplinary Exploration and Research in Astrophysics and Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USAAshish A MahabalDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAE. BellmDIRAC Institute, Department of Astronomy, University of Washington, Seattle, WA 98195, USAMaria T. PattersonDIRAC Institute, Department of Astronomy, University of Washington, Seattle, WA 98195, USAMario JurićDIRAC Institute, Department of Astronomy, University of Washington, Seattle, WA 98195, USAV. Z. GolkhouDIRAC Institute, Department of Astronomy, University of Washington, Seattle, WA 98195, USAE. O. OfekBenoziyo Center for Astrophysics, Weizmann Institute of Science, 76100 Rehovot, IsraelRichard WaltersCaltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125, USAM. J. GrahamDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAM. M. KasliwalDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USARichard DekanyCaltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125, USAT. KupferDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAKevin B. BurdgeDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAChristopher B. CannellaDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USATom A. BarlowDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAA. Van SistineDepartment of Physics, University of Wisconsin, Milwaukee, WI 53201, USAM. GiomiC. FremlingDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAN. BlagorodnovaDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAD. LevitanDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAReed RiddleCaltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125, USARoger M. SmithCaltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125, USAG. HelouIPAC, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; [email protected]Thomas A. PrinceDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USAS. R. KulkarniDivision of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USA

2018en

ABI

Аннотация

The Zwicky Transient Facility (ZTF) is a new robotic time-domain survey currently in progress using the Palomar 48-inch Schmidt Telescope. ZTF uses a 47 square degree field with a 600 megapixel camera to scan the entire northern visible sky at rates of 3760 square degrees/hour to median depths of g20.8 and r20.6 mag (AB, 5 in 30 sec). We describe the Science Data System that is housed at IPAC, Caltech. This comprises the data-processing pipelines, alert production system, data archive, and user interfaces for accessing and analyzing the products. The real-time pipeline employs a novel image-differencing algorithm, optimized for the detection of point-source transient events. These events are vetted for reliability using a machine-learned classifier and combined with contextual information to generate data-rich alert packets. The packets become available for distribution typically within 13 minutes (95th percentile) of observation. Detected events are also linked to generate candidate moving-object tracks using a novel algorithm. Objects that move fast enough to streak in the individual exposures are also extracted and vetted. We present some preliminary results of the calibration performance delivered by the real-time pipeline. The reconstructed astrometric accuracy per science image with respect to Gaia DR1 is typically 45 to 85 milliarcsec. This is the RMS per-axis on the sky for sources extracted with photometric S/N10 and hence corresponds to the typical astrometric uncertainty down to this limit. The derived photometric precision (repeatability) at bright unsaturated fluxes varies between 8 and 25 millimag. The high end of these ranges corresponds to an airmass approaching 2-the limit of the public survey. Photometric calibration accuracy with respect to Pan-STARRS1 is generally better than 2%. The products support a broad range of scientific applications: fast and young supernovae; rare flux transients; variable stars; eclipsing binaries; variability from active galactic nuclei;

Перевод пока недоступен

Идентификаторы

DOI: 10.1088/1538-3873/aae8ac

Цитирования и источники

Цитирований: 11Использованных источников: 0

Показатели — AkademScholar