The Palomar Transient Factory Sky2Night programme

Abstract

We present results of the Sky2Night project: a systematic, unbiased search for fast optical transients with the Palomar Transient Factory. We have observed 407 deg${}^2$ in $R$-band for 8 nights at a cadence of 2 hours. During the entire duration of the project, the 4.2m William Herschel Telescope on La Palma was dedicated to obtaining identification spectra for the detected transients. During the search, we found 12 supernovae, 10 outbursting cataclysmic variables, 9 flaring M-stars, 3 flaring active Galactic nuclei and no extragalactic fast optical transients. Using this systematic survey for transients, we have calculated robust observed rates for the detected types of transients, and upper limits of the rate of extragalactic fast optical transients of $\mathcal{R}<37\times 10^{-4}$deg${}^{-2}$d${}^{-1}$ and $\mathcal{R}<9.3\times 10^{-4}$deg${}^{-2}$d${}^{-1}$ for timescales of 4h and 1d and a limiting magnitude of $R\approx 19.7$. We use the results of this project to determine what kind of and how many astrophysical false positives we can expect when following up gravitational wave detections in search for kilonovae.

References in corpus (100)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Astropy: A Community Python Package for Astronomy
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• The Seventh Data Release of the Sloan Digital Sky Survey
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Multi-messenger Observations of a Binary Neutron Star Merger
• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• Advanced LIGO
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• Gamma-Ray Bursts and the Fireball Model
• Transient Events from Neutron Star Mergers
• First Results from the Catalina Real-time Transient Survey
• Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event
• Swope Supernova Survey 2017a (SSS17a), the Optical Counterpart to a Gravitational Wave Source
• The Palomar Transient Factory: System Overview, Performance and First Results
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models
• Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
• The X-ray counterpart to the gravitational wave event GW 170817
• A kilonova as the electromagnetic counterpart to a gravitational-wave source
• SALT2: using distant supernovae to improve the use of Type Ia supernovae as distance indicators
• Light Curves of the Neutron Star Merger GW170817/SSS17a: Implications for R-Process Nucleosynthesis
• Nearby Supernova Rates from the Lick Observatory Supernova Search. II. The Observed Luminosity Functions and Fractions of Supernovae in a Complete Sample
• Illuminating Gravitational Waves: A Concordant Picture of Photons from a Neutron Star Merger
• WISeREP - An Interactive Supernova Data Repository
• The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars
• The 2MASS Redshift Survey - Description and Data Release
• Exploring the Optical Transient Sky with the Palomar Transient Factory
• The Pan-STARRS1 Surveys
• Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger
• Effect of a High Opacity on the Light Curves of Radioactively Powered Transients from Compact Object Mergers
• The Combined Ultraviolet, Optical, and Near-Infrared Light Curves of the Kilonova Associated with the Binary Neutron Star Merger GW170817: Unified Data Set, Analytic Models, and Physical Implications
• Swift and NuSTAR observations of GW170817: detection of a blue kilonova
• A Decade of Short-duration Gamma-ray Burst Broad-band Afterglows: Energetics, Circumburst Densities, and Jet Opening Angles
• Determining the Type, Redshift, and Age of a Supernova Spectrum
• Radiative Transfer Simulations for Neutron Star Merger Ejecta
• The discovery of the electromagnetic counterpart of GW170817: kilonova AT 2017gfo/DLT17ck
• Red or blue? A potential kilonova imprint of the delay until black hole formation following a neutron star merger
• Kepler Flares I. Active and Inactive M dwarfs
• K-corrections and spectral templates of Type Ia supernovae
• Early Spectra of the Gravitational Wave Source GW170817: Evolution of a Neutron Star Merger
• Kilonova Light Curves from the Disk Wind Outflows of Compact Object Mergers
• Electromagnetic Transients Powered by Nuclear Decay in the Tidal Tails of Coalescing Compact Binaries
• Short-period AM CVn systems as optical, X-ray and gravitational wave sources
• Proper image subtraction - optimal transient detection, photometry and hypothesis testing
• Follow up of GW170817 and its electromagnetic counterpart by Australian-led observing programs
• J-GEM observations of an electromagnetic counterpart to the neutron star merger GW170817
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae
• Frequent flaring in the TRAPPIST-1 system - unsuited for life?
• Type-Ia Supernova Rates to Redshift 2.4 from CLASH: the Cluster Lensing And Supernova survey with Hubble
• Detectability of compact binary merger macronovae
• The Extremes of Thermonuclear Supernovae
• A White Light Megaflare on the dM4.5e Star YZ CMi
• Automating Discovery and Classification of Transients and Variable Stars in the Synoptic Survey Era
• Galaxy Strategy for LIGO-Virgo Gravitational Wave Counterpart Searches
• iPTF Discovery of the Rapid "Turn On" of a Luminous Quasar
• Observations of the first electromagnetic counterpart to a gravitational wave source by the TOROS collaboration
• M Dwarfs in SDSS Stripe 82: Photometric Light Curves and Flare Rate Analysis
• Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3$\pi$ Survey
• The Host Galaxies of Type Ia Supernovae Discovered by the Palomar Transient Factory
• The WISE Blazar-Like Radio-Loud Sources: An All-Sky Catalog Of Candidate Gamma-Ray Blazars
• GRB170817A associated with GW170817: multifrequency observations and modeling of prompt gamma-ray emission
• Using Machine Learning for Discovery in Synoptic Survey Imaging
• High Redshift Supernovae in the Hubble Deep Field
• Hubble Space Telescope studies of low-redshift Type Ia supernovae: Evolution with redshift and ultraviolet spectral trends
• Cataclysmic Variables from the Catalina Real-time Transient Survey
• The Deep Lens Survey
• Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations
• M Dwarf Flares from Time-Resolved SDSS Spectra
• Optical Observations of LIGO Source GW 170817 by the Antarctic Survey Telescopes at Dome A, Antarctica
• The Deep Lens Survey Transient Search I : Short Timescale and Astrometric Variability
• Discovery of a Cosmological, Relativistic Outburst via its Rapidly Fading Optical Emission
• The effects of r-process heating on fall-back accretion in compact object mergers
• Multi-wavelength characterization of stellar flares on low-mass stars using SDSS and 2MASS time domain surveys
• The Cause of the Superoutburst in SU UMa Stars is Finally Revealed by Kepler Light Curve of V1504 Cygni
• The Type Ia Supernova Color-Magnitude Relation and Host Galaxy Dust: A Simple Hierarchical Bayesian Model
• The space density and X-ray luminosity function of non-magnetic cataclysmic variables
• iPTF14yb: The First Discovery of a GRB Afterglow Independent of a High-Energy Trigger
• Characterizing a Dramatic $\Delta V\sim -9$ Flare on an Ultracool Dwarf Found by the ASAS-SN Survey
• The Needle in the 100 deg2 Haystack: Uncovering Afterglows of Fermi GRBs with the Palomar Transient Factory
• Intermediate Palomar Transient Factory: Realtime Image Subtraction Pipeline
• A Search for Fast Optical Transients in the Pan-STARRS1 Medium-Deep Survey: M Dwarf Flares, Asteroids, Limits on Extragalactic Rates, and Implications for LSST
• A Search for Untriggered GRB Afterglows with ROTSE-III
• The nature of the DLS fast transients
• Kepler Flares IV: A Comprehensive Analysis of the Activity of the dM4e Star GJ 1243
• Convolutional Neural Networks for Transient Candidate Vetting in Large-Scale Surveys
• Galaxy Zoo Supernovae
• Search for Early Gamma-ray Production in Supernovae Located in a Dense Circumstellar Medium with the Fermi LAT
• Real-Time Recovery Efficiencies and Performance of the Palomar Transient Factory's Transient Discovery Pipeline
• iPTF Archival Search for Fast Optical Transients
• Optical Observations of Gamma-Ray Bursts, the Discovery of Supernovae 2005bv, 2005ee, and 2006ak, and Searches for Transients Using the "MASTER" Robotic Telescope
• Followup Observations of SDSS and CRTS Candidate Cataclysmic Variables
• A Survey for Fast Transients in the Fornax Cluster of Galaxies
• Exploratory Spectroscopy of Magnetic Cataclysmic Variables Candidates and Other Variable Objects
• High-speed photometry of faint cataclysmic variables - VIII. Targets from the Catalina Real-time Transient Survey
• Preparing for advanced LIGO: A Star-Galaxy Separation Catalog for the Palomar Transient Factory
• The Redshift Completeness of Local Galaxy Catalogs
• Discovery of the neutron stars merger GW170817/GRB170817A and Binary Stellar Evolution
• iPTF Survey for Cool Transients
• A Challenge to Identify an Optical Counterpart of the Gravitational Wave Event GW151226 with Hyper Suprime-Cam
• An Empirical Study of Contamination in Deep, Rapid, and Wide-Field Optical Follow-Up of Gravitational Wave Events

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• ZTF20aajnksq (AT2020blt): A Fast Optical Transient at $z\approx 2.9$ With No Detected Gamma-Ray Burst Counterpart
• Probing the extragalactic fast transient sky at minute timescales with DECam
• The BlackGEM telescope array I: Overview
• Photometric Flaring Fraction of M dwarf Stars from the SkyMapper Southern Survey
• The Evryscope Fast Transient Engine: Real-Time Detection for Rapidly Evolving Transients
• Electromagnetic counterparts to gravitational wave events from Gaia
• Detecting the early optical flashes of gamma-ray bursts with small telescope arrays
• SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year