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Title: The Zwicky Transient Facility: Science Objectives

Journal Article · · Publications of the Astronomical Society of the Pacific
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The Zwicky Transient Facility (ZTF), a public–private enterprise, is a new time-domain survey employing a dedicated camera on the Palomar 48-inch Schmidt telescope with a 47 deg2 field of view and an 8 second readout time. It is well positioned in the development of time-domain astronomy, offering operations at 10% of the scale and style of the Large Synoptic Survey Telescope (LSST) with a single 1-m class survey telescope. The public surveys will cover the observable northern sky every three nights in g and r filters and the visible Galactic plane every night in g and r. Alerts generated by these surveys are sent in real time to brokers. A consortium of universities that provided funding (“partnership”) are undertaking several boutique surveys. The combination of these surveys producing one million alerts per night allows for exploration of transient and variable astrophysical phenomena brighter than r ~ 20.5 on timescales of minutes to years. We describe the primary science objectives driving ZTF, including the physics of supernovae and relativistic explosions, multi-messenger astrophysics, supernova cosmology, active galactic nuclei, and tidal disruption events, stellar variability, and solar system objects.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
LDRD; USDOE; USDOE Office of Science (SC)
Contributing Organization:
Zwicky Transient Facility (ZTF) Collaboration
Grant/Contract Number:
89233218CNA000001; AC02-05CH11231
OSTI ID:
1567168
Report Number(s):
LA-UR--19-30653; ark:/13030/qt61p1v1tv
Journal Information:
Publications of the Astronomical Society of the Pacific, Journal Name: Publications of the Astronomical Society of the Pacific Journal Issue: 1001 Vol. 131; ISSN 0004-6280
Publisher:
Astronomical Society of the Pacific (ASP)Copyright Statement
Country of Publication:
United States
Language:
English

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Shedding light on the Type Ia supernova extinction puzzle: dust location found journal June 2018
Optimizing spectroscopic follow-up strategies for supernova photometric classification with active learning journal November 2018
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Implications of the radio and X-ray emission that followed GW170817 journal April 2018
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The red supergiant and supernova rate problems: implications for core-collapse supernova physics journal September 2014
Seeing double: the frequency and detectability of double-peaked superluminous supernova light curves journal January 2016
The cosmic transparency measured with Type Ia supernovae: implications for intergalactic dust journal April 2018
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Lensing time delays and cosmological complementarity journal December 2011
Choked jets and low-luminosity gamma-ray bursts as hidden neutrino sources journal April 2016
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GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral journal October 2017
Late Time Afterglow Observations Reveal a Collimated Relativistic Jet in the Ejecta of the Binary Neutron Star Merger GW170817 journal June 2018
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TeV Neutrinos from Successful and Choked Gamma-Ray Bursts journal October 2001
ACTS: An Active Learning Method for Time Series Classification conference April 2017
Active Learning for Multivariate Time Series Classification with Positive Unlabeled Data conference November 2015
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The death of massive stars - I. Observational constraints on the progenitors of Type II-P supernovae journal May 2009
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Wave-driven mass loss in the last year of stellar evolution: setting the stage for the most luminous core-collapse supernovae: Wave-Driven Mass loss journal May 2012
The Zwicky Transient Facility Camera conference August 2016
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"Why Should I Trust You?": Explaining the Predictions of Any Classifier
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  • Proceedings of the 22nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining - KDD '16 https://doi.org/10.1145/2939672.2939778
conference January 2016
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Clustering correlated, sparse data streams to estimate a localized housing price index journal June 2017
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FLASH SPECTROSCOPY: EMISSION LINES FROM THE IONIZED CIRCUMSTELLAR MATERIAL AROUND <10-DAY-OLD TYPE II SUPERNOVAE journal February 2016
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Type ii Supernova Energetics and Comparison of Light Curves to Shock-Cooling Models journal March 2016
THE DETECTION RATE OF EARLY UV EMISSION FROM SUPERNOVAE: A DEDICATED GALEX /PTF SURVEY AND CALIBRATED THEORETICAL ESTIMATES journal March 2016
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PTF13efv—AN OUTBURST 500 DAYS PRIOR TO THE SNHUNT 275 EXPLOSION AND ITS RADIATIVE EFFICIENCY journal June 2016
A 2.4% Determination of the Local Value of the Hubble Constant journal July 2016
Type i Superluminous Supernovae as Explosions Inside Non-Hydrogen Circumstellar Envelopes journal September 2016
Host-Galaxy Properties of 32 Low-Redshift Superluminous Supernovae from the Palomar Transient Factory journal October 2016
Proper Image Subtraction—Optimal Transient Detection, Photometry, and Hypothesis Testing journal October 2016
PS1-14bj: A HYDROGEN-POOR SUPERLUMINOUS SUPERNOVA WITH A LONG RISE AND SLOW DECAY journal November 2016
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Photometric Variability of the Be Star Population journal May 2017
A Search of Reactivated Comets journal April 2017
Searching for Be Stars in the Open Clusters with PTF/iPTF. I. Cluster Sample and Be Star Candidates journal January 2018
A First Catalog of Variable Stars Measured by the Asteroid Terrestrial-impact Last Alert System (ATLAS) journal November 2018
iPTF Discovery of the Rapid “Turn-on” of a Luminous Quasar journal January 2017
All-sky Search for Time-integrated Neutrino Emission from Astrophysical Sources with 7 yr of IceCube Data journal January 2017
Two New Calcium-rich Gap Transients in Group and Cluster Environments journal February 2017
Revisiting Optical Tidal Disruption Events with iPTF16axa journal June 2017
Very Low-energy Supernovae: Light Curves and Spectra of Shock Breakout journal August 2017
Exploring the Efficacy and Limitations of Shock-cooling Models: New Analysis of Type II Supernovae Observed by the Kepler Mission journal October 2017
Measuring the Growth Rate of Structure with Type IA Supernovae from LSST journal September 2017
On the Mass and Luminosity Functions of Tidal Disruption Flares: Rate Suppression due to Black Hole Event Horizons journal January 2018
iPTF 16asu: A Luminous, Rapidly Evolving, and High-velocity Supernova journal December 2017
Hydrogen-poor Superluminous Supernovae from the Pan-STARRS1 Medium Deep Survey journal January 2018
Precise Time Delays from Strongly Gravitationally Lensed Type Ia Supernovae with Chromatically Microlensed Images journal March 2018
New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope : Implications for the Hubble Constant journal March 2018
RATIR Follow-up of LIGO/Virgo Gravitational Wave Events journal April 2018
Light Curves of Hydrogen-poor Superluminous Supernovae from the Palomar Transient Factory journal June 2018
The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample journal May 2018
The Volumetric Rate of Calcium-rich Transients in the Local Universe journal May 2018
A GRB and Broad-lined Type Ic Supernova from a Single Central Engine journal June 2018
The Redshift Completeness of Local Galaxy Catalogs journal June 2018
Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant journal July 2018
Blazar Flares as an Origin of High-energy Cosmic Neutrinos? journal September 2018
iPTF 16hgs: A Double-peaked Ca-rich Gap Transient in a Metal-poor, Star-forming Dwarf Galaxy journal October 2018
Supernova PTF 12glz: A Possible Shock Breakout Driven through an Aspherical Wind journal February 2019
Machine-learning-based Brokers for Real-time Classification of the LSST Alert Stream journal May 2018
Sifting for Sapphires: Systematic Selection of Tidal Disruption Events in iPTF journal September 2018
DES14X3taz: A TYPE I SUPERLUMINOUS SUPERNOVA SHOWING A LUMINOUS, RAPIDLY COOLING INITIAL PRE-PEAK BUMP journal February 2016
An Enhanced rate of Tidal Disruptions in the Centrally Overdense e+a Galaxy ngc 3156 journal June 2016
HOW TO FIND GRAVITATIONALLY LENSED TYPE Ia SUPERNOVAE journal December 2016
Confirmation of Large Super-fast Rotator (144977) 2005 EC 127 journal May 2017
Early Blue Excess from the Type Ia Supernova 2017cbv and Implications for Its Progenitor journal August 2017
An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi -GBM Detection of GRB 170817A journal October 2017
The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. III. Optical and UV Spectra of a Blue Kilonova from Fast Polar Ejecta journal October 2017
Gravitational Waves and Gamma-Rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A journal October 2017
CO-driven Activity in Comet C/2017 K2 (PANSTARRS) journal October 2017
Lessons from the Short GRB 170817A: The First Gravitational-wave Detection of a Binary Neutron Star Merger journal November 2017
iPTF Archival Search for Fast Optical Transients journal February 2018
A Turnover in the Radio Light Curve of GW170817 journal May 2018
A Decline in the X-Ray through Radio Emission from GW170817 Continues to Support an Off-axis Structured Jet journal August 2018

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Stingray : A Modern Python Library for Spectral Timing journal August 2019
A New Class of Changing-look LINERs journal September 2019
The Analogous Structure of Accretion Flows in Supermassive and Stellar Mass Black Holes: New Insights from Faded Changing-look Quasars journal September 2019
Type IIn Supernova Light Curves Powered by Forward and Reverse Shocks journal October 2019
A Rapidly Declining Transient Discovered with the Subaru/Hyper Suprime-Cam journal October 2019
ZTF Early Observations of Type Ia Supernovae. I. Properties of the 2018 Sample journal December 2019
Evidence for Late-stage Eruptive Mass Loss in the Progenitor to SN2018gep, a Broad-lined Ic Supernova: Pre-explosion Emission and a Rapidly Rising Luminous Transient journal December 2019
An Optimized Radio Follow-up Strategy for Stripped-envelope Core-collapse Supernovae journal January 2020
A New Class of Large-amplitude Radial-mode Hot Subdwarf Pulsators journal June 2019
Follow-up of the Neutron Star Bearing Gravitational-wave Candidate Events S190425z and S190426c with MMT and SOAR journal July 2019
Discovery of an Intermediate-luminosity Red Transient in M51 and Its Likely Dust-obscured, Infrared-variable Progenitor journal July 2019
Searches after Gravitational Waves Using ARizona Observatories (SAGUARO): System Overview and First Results from Advanced LIGO/Virgo’s Third Observing Run journal August 2019
GROWTH on S190425z: Searching Thousands of Square Degrees to Identify an Optical or Infrared Counterpart to a Binary Neutron Star Merger with the Zwicky Transient Facility and Palomar Gattini-IR journal October 2019
Comet 240P/NEAT Is Stirring journal November 2019
Hot and Eccentric: The Discovery of 2019 LF6 as a New Step in the Quest for the Vatira Population journal July 2019
Outbursts at Comets 46P/Wirtanen, 64P/Swift-Gehrels, and 78P/Gehrels 2 in 2018 journal September 2019
Simultaneous Observations of the Northern TESS Sectors by the Zwicky Transient Facility journal September 2019
Gravitational Microlensing Events from the First Year of the Northern Galactic Plane Survey by the Zwicky Transient Facility journal January 2020
The Analogous Structure of Accretion Flows in Supermassive and Stellar Mass Black Holes: New Insights from Faded Changing-Look Quasars text January 2019
Discovery of Highly Blueshifted Broad Balmer and Metastable Helium Absorption Lines in a Tidal Disruption Event text January 2019
Transient processing and analysis using $\texttt{AMPEL}$: Alert Management, Photometry and Evaluation of Lightcurves text January 2019
Discovery of an intermediate-luminosity red transient in M51 and its likely dust-obscured, infrared-variable progenitor text January 2019
Evidence for Late-stage Eruptive Mass-loss in the Progenitor to SN2018gep, a Broad-lined Ic Supernova: Pre-explosion Emission and a Rapidly Rising Luminous Transient text January 2019
POSSIS: predicting spectra, light curves and polarization for multi-dimensional models of supernovae and kilonovae text January 2019
Searches After Gravitational-waves Using ARizona Observatories (SAGUARO): System Overview and First Results from Advanced LIGO/Virgo's Third Observing Run text January 2019
Type IIn Supernova Light Curves Powered by Forward and Reverse Shocks text January 2019
General relativistic orbital decay in a seven-minute-orbital-period eclipsing binary system text January 2019
An optimized radio follow-up strategy for stripped-envelope core-collapse supernovae text January 2019
A rapidly declining transient discovered with Subaru/Hyper Suprime-Cam text January 2019
ZTF Early Observations of Type Ia Supernovae I: Properties of the 2018 Sample text January 2019
Implications of the search for optical counterparts during the first six months of the Advanced LIGO's and Advanced Virgo's third observing run: possible limits on the ejecta mass and binary properties text January 2019
Comet 240P/NEAT is Stirring text January 2019
A Twilight Search for Atiras, Vatiras and Co-orbital Asteroids: Preliminary Results text January 2019
Gravitational microlensing events from the first year of the northern Galactic plane survey by the Zwicky Transient Facility text January 2020

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