One of Everything: The Breakthrough Listen Exotica Catalog

Abstract

We present Breakthrough Listen's "Exotica" Catalog as the centerpiece of our efforts to expand the diversity of targets surveyed in the Search for Extraterrestrial Intelligence (SETI). As motivation, we introduce the concept of survey breadth, the diversity of objects observed during a program. Several reasons for pursuing a broad program are given, including increasing the chance of a positive result in SETI, commensal astrophysics, and characterizing systematics. The Exotica Catalog is a 963 entry collection of 816 distinct targets intended to include "one of everything" in astronomy. It contains four samples: the Prototype sample, with an archetype of every known major type of non-transient celestial object; the Superlative sample of objects with the most extreme properties; the Anomaly sample of enigmatic targets that are in some way unexplained; and the Control sample with sources not expected to produce positive results. As far as we are aware, this is the first object list in recent times with the purpose of spanning the breadth of astrophysics. We share it with the community in hopes that it can guide treasury surveys and as a general reference work. Accompanying the catalog is extensive discussion of classification of objects and a new classification system for anomalies. Extensive notes on the objects in the catalog are available online. We discuss how we intend to proceed with observations in the catalog, contrast it with our extant Exotica efforts, and suggest similar tactics may be applied to other programs.

arXiv commentCorresponds to version published in ApJS. 122 pages (29 pages + full appendices and references), 13 tables, 6 figures

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• Surrounded by Spiders! New Black Widows and Redbacks in the Galactic Field
• The HARPS search for southern extra-solar planets. XXXVIII. Bayesian re-analysis of three systems. New super-Earths, unconfirmed signals, and magnetic cycles
• Warm Jupiters Need Close "Friends" for High-Eccentricity Migration -- A Stringent Upper Limit on the Perturber's Separation
• A Debris Disk around the Central Star of the Helix Nebula?
• The Kepler Light Curves of AGN: A Detailed Analysis
• A remnant planetary core in the hot-Neptune desert
• No X-rays from the very nearby Type Ia SN2014J: constraints on its environment
• 1E0657-56: A Contender for the Hottest Known Cluster of Galaxies
• Transit observations of the Hot Jupiter HD 189733b at X-ray wavelengths
• Is pulsar B0656+14 a very nearby RRAT source?
• The Natural History of 'Oumuamua
• ARRAKIS: Atlas of Resonance Rings As Known In the S4G
• Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307
• The near-infrared spectral energy distribution of β Pictoris b
• Synthesizing Exoplanet Demographics from Radial Velocity and Microlensing Surveys, II: The Frequency of Planets Orbiting M Dwarfs
• Masses and orbital inclinations of planets in the PSR B1257+12 system
• PPl 15: The First Brown Dwarf Spectroscopic Binary
• The Composition of Comets
• Evidence for 1122 Hz X-Ray Burst Oscillations from the Neutron-Star X-Ray Transient XTE J1739-285
• Resolving Vega and the inclination controversy with CHARA/MIRC
• Suzaku observations of the diffuse x-ray emission across the fermi bubbles' edges
• Observation of the full 12-hour-long transit of the exoplanet HD80606b. Warm-Spitzer photometry and SOPHIE spectroscopy
• Stellar Diameters and Temperatures VI. High angular resolution measurements of the transiting exoplanet host stars HD 189733 and HD 209458 and implications for models of cool dwarfs
• Target Selection for SETI: 1. A Catalog of Nearby Habitable Stellar Systems
• High-resolution spectroscopy of a young, low-metallicity optically-thin L=0.02L* star-forming galaxy at z=3.12
• The nature of giant clumps in distant galaxies probed by the anatomy of the Cosmic Snake
• Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf
• Imaging and Modeling Rapidly Rotating Stars: Alpha Cephei and Alpha Ophiuchi
• The Breakthrough Listen Search for Intelligent Life: Observations of 1327 Nearby Stars over 1.10-3.45 GHz
• A surge of light at the birth of a supernova
• Analysis of the carbon-rich very metal-poor dwarf G77-61
• The Featureless Transmission Spectra of Two Super-Puff Planets
• Recovery of the Candidate Protoplanet HD 100546 b with Gemini/NICI and Detection of Additional (Planet-Induced?) Disk Structure at Small Separations
• Low-Latency Gravitational Wave Alerts for Multi-Messenger Astronomy During the Second Advanced LIGO and Virgo Observing Run
• Revealing the magnetic field in a distant galaxy cluster: discovery of the complex radio emission from MACS J0717.5 +3745
• Evidence for an outer disk in the Prototype `Compact Elliptical' Galaxy M32
• SubmilliJansky Transients in Archival Radio Observations
• The Narrow-Line Regions of LINERs as Resolved with the Hubble Space Telescope
• The Ĝ Infrared Search for Extraterrestrial Civilizations with Large Energy Supplies. III. The Reddest Extended Sources in WISE
• An Earth-sized exoplanet with a Mercury-like composition
• Drifting Asteroid Fragments Around WD 1145+017
• Discovery of a Planetary-Mass Brown Dwarf with a Circumstellar Disk
• J0811+4730: the most metal-poor star-forming dwarf galaxy known
• Hot DQ White Dwarfs: Something Different
• Precision southern hemisphere VLBI pulsar astrometry II: Measurement of seven parallaxes
• The WISE Extended Source Catalogue (WXSC) I: The 100 Largest Galaxies
• LOFAR discovery of a 23.5-second radio pulsar
• Is HR 6819 a triple system containing a black hole? -- An alternative explanation
• The GJ 436 System: Directly Determined Astrophysical Parameters of an M-Dwarf and Implications for the Transiting Hot Neptune
• The Earliest Phases of Star formation observed with Herschel (EPoS): The dust temperature and density distributions of B68
• NGC 404, A Rejuvenated Lenticular Galaxy on a Merger-Induced, Blueward Excursion into the Green Valley
• Crab: the standard X-ray candle with all (modern) X-ray satellites
• Measurements of Physical Parameters of White Dwarfs: A Test of the Mass-Radius Relation
• Photometrically derived masses and radii of the planet and star in the TrES-2 system
• Magnetic field topology of the unique chemically peculiar star CU Virginis
• The Accreting Millisecond X-ray Pulsar IGR J00291+5934: Evidence for a Long Timescale Spin Evolution
• Jekyll & Hyde: quiescence and extreme obscuration in a pair of massive galaxies 1.5 Gyr after the Big Bang
• Evryscope science: exploring the potential of all-sky gigapixel-scale telescopes
• Variability in the CoRoT photometry of three hot O-type stars. HD 46223, HD 46150 and HD 46966
• On the Impact of Satellite Constellations on Astronomical Observations with ESO telescopes in the Visible and Infrared Domains
• Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS
• The Breakthrough Listen Search for Intelligent Life: Target Selection of Nearby Stars and Galaxies
• Measuring the Diffuse Optical Light in Abell 1651
• The Magnetic Early B-type Stars III: A main sequence magnetic, rotational, and magnetospheric biography
• The NASA Astrophysics Data System: Overview
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• On the nature of the galactic early-B hypergiants
• High angular resolution ALMA images of dust and molecules in the SN 1987A ejecta
• A Third Exoplanetary System with Misaligned Orbital and Stellar Spin Axes
• Molecular gas content in strongly-lensed z~1.5-3 star-forming galaxies with low IR luminosities
• The History and Environment of a Faded Quasar: Hubble Space Telescope observations of Hanny's Voorwerp and IC 2497
• Life, The Universe, and Nothing: Life and Death in an Ever-Expanding Universe
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• Spectroscopic Evidence for a 5.4-Minute Orbital Period in HM Cancri
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• M Dwarf Flares from Time-Resolved SDSS Spectra
• Discovery of a new kind of explosive X-ray transient near M86
• Magnetar-like activity from the central compact object in the SNR RCW103
• Evolution of the solar activity over time and effects on planetary atmospheres. II. kappa^1 Ceti, an analog of the Sun when life arose on Earth
• Structure and dynamics of giant low surface brightness galaxies
• Deep radio observations of the radio halo of the bullet cluster 1E 0657-55.8
• Magnetic Doppler imaging of alpha^2 Canum Venaticorum in all four Stokes parameters. Unveiling the hidden complexity of stellar magnetic fields
• A 40-billion solar mass black hole in the extreme core of Holm 15A, the central galaxy of Abell 85
• Main-Belt Comet P/2008 R1 (Garradd)
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• The CMB cold spot: texture, cluster or void?
• The distance and radius of the neutron star PSR B0656+14
• Radio Non-Detection of the SGR 1806-20 Giant Flare and Implications for Fast Radio Bursts
• Discovery of a Cosmological, Relativistic Outburst via its Rapidly Fading Optical Emission
• On The Origin of the Local Group's Peculiar Velocity
• Monitoring Supergiant Fast X-ray Transients with Swift. I. Behavior outside outbursts
• Fundamental parameters of B Supergiants from the BCD System
• The Pluto System After New Horizons
• A new class of pulsating white dwarf of extremely low mass: the fourth and fifth members
• A New, Faint Population of X-ray Transients
• The Ubiquity and Dual Nature of Ultra Compact Dwarfs
• γ^2 Velorum: Orbital Solution and Fundamental Parameter Determination with SUSI
• Keck Observations of the Galactic Center Source G2: Gas Cloud or Star?
• Identifying the source of perytons at the Parkes radio telescope
• Detection of a Supervoid Aligned with the Cold Spot of the Cosmic Microwave Background
• The Cluster Velocity Dispersion of the Abell 2199 cD Halo of NGC 6166
• Pulsar emission amplified and resolved by plasma lensing in an eclipsing binary
• CLASH: Complete Lensing Analysis of the Largest Cosmic Lens MACS J0717.5+3745 and Surrounding Structures
• The Ĝ Search for Extraterrestrial Civilizations with Large Energy Supplies. IV. The Signatures and Information Content of Transiting Megastructures
• Star Formation in Luminous HII regions in M33
• The Y-Type Brown Dwarfs: Estimates of Mass and Age from New Astrometry, Homogenized Photometry and Near-Infrared Spectroscopy
• The puzzling dynamical status of the core of the globular cluster NGC 6752
• Chandra X-ray Imaging Spectroscopy of the Young Supernova Remnant Kesteven 75
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• The Extraordinary `Superthin' Spiral Galaxy UGC7321. I. Disk Color Gradients and Global Properties from Multiwavelength Observations
• The physical and chemical structure of Sagittarius B2. II. Continuum millimeter emission of SgrB2(M) and SgrB2(N) with ALMA
• A Luminous, Fast Rising UV-Transient Discovered by ROTSE: a Tidal Disruption Event?
• The Dipole Repeller
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• Empirical photometric calibration of the Gaia Red Clump: colours, effective temperature and absolute magnitude
• The Masses and Accretion Rates of White Dwarfs in Classical and Recurrent Novae
• Gamma-ray Pulsar Revolution
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• Timing of Millisecond Pulsars in NGC 6752: Evidence for a High Mass-to-Light Ratio in the Cluster Core
• High-Resolution Spectroscopy of the Yellow Hypergiant Rho Cassiopeiae from 1993 Through the Outburst of 2000-2001
• Three Ancient Halo Subgiants: Precise Parallaxes, Compositions, Ages, and Implications for Globular Clusters
• V838 Monocerotis: A Geometric Distance from Hubble Space Telescope Polarimetric Imaging of its Light Echo
• Study of the Core of the Shapley Concentration: I.the Sample
• S62 and S4711: Indications of a population of faint fast moving stars inside the S2 orbit -- S4711 on a 7.6 year orbit around Sgr~A*
• A Revised View of the Transient Radio Sky
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• Fundamental properties and atmospheric structure of the red supergiant VY CMa based on VLTI/AMBER spectro-interferometry
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• An extremely peculiar hot subdwarf with a ten-thousand-fold excess of zirconium, yttrium, and strontium
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• Luminosities and mass-loss rates of Local Group AGB stars and Red Supergiants
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• Detection of visible light from the darkest world
• Not so fast: LB-1 is unlikely to contain a 70 $M_{\odot }$ black hole
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• (Almost) Dark HI Sources in the ALFALFA Survey: The Intriguing Case of HI1232+20
• Blue large-amplitude pulsators as a new class of variable stars
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• The Subluminous and Peculiar Type Ia Supernova PTF09dav
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• The Alpha Centauri Binary System: Atmospheric Parameters and Element Abundances
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• Dippers and Dusty Disks Edges: A Unified Model
• Planetary Collisions outside the Solar System: Time Domain Characterization of Extreme Debris Disks
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• The ALMA-PILS survey: Formaldehyde deuteration in warm gas on small scales toward IRAS 16293-2422 B
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• Massive stars on the verge of exploding: the properties of oxygen sequence Wolf-Rayet stars
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• LOFAR MSSS: Detection of a low-frequency radio transient in 400 hrs of monitoring of the North Celestial Pole
• Revised Distances to 21 Supernova Remnants
• New Distances to Four Supernova Remnants
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• Analysis of old very metal rich stars in the solar neighbourhood
• IRAS-based whole-sky upper limit on Dyson Spheres
• On the origin of X-shaped radio galaxies
• Extragalactic SETI: The Tully-Fisher relation as a probe of Dysonian astroengineering in disk galaxies
• Probing the presence of a single or binary black hole in the globular cluster NGC 6752 with pulsar dynamics
• A Submillimeter Survey of Gravitationally Lensed Quasars
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• The light variability of the helium strong star HD 37776 as a result of its inhomogeneous elemental surface distribution
• Fermi-LAT Observations of the LIGO event GW150914
• The Ages of A-Stars I: Interferometric Observations and Age Estimates for Stars in the Ursa Major Moving Group
• A Robust Tip of the Red Giant Branch Distance to the Fireworks Galaxy (NGC 6946)
• Extreme dust disks in Arp 220 as revealed by ALMA
• Confirmation of One of the Coldest Known Brown Dwarfs
• Partly burnt runaway stellar remnants from peculiar thermonuclear supernovae
• On the Origin of Sub-subgiant Stars. I. Demographics
• The Nucleus of Interstellar Comet 2I/Borisov
• HATS-17b: A Transiting Compact Warm Jupiter in a 16.3 Days Circular Orbit
• A New Look at the Old Star Cluster NGC 6791
• The comet 17P/Holmes 2007 outburst: the early motion of the outburst material
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• A search for steep spectrum radio relics and halos with the GMRT
• Signatures of Cloud, Temperature, and Gravity From Spectra of the Closest Brown Dwarfs
• Far-infrared Herschel SPIRE spectroscopy of lensed starbursts reveals physical conditions of ionised gas
• Gone without a bang: An archival HST survey for disappearing massive stars
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• The Exploration of the Unknown
• The ALMA Discovery of the Rotating Disk and Fast Outflow of Cold Molecular Gas in NGC 1275
• Observations of the unidentified gamma-ray source TeV J2032+4130 by VERITAS
• The Star Formation History of the very metal poor BCD IZw18 from HST/ACS data
• NGC 604, the Scaled OB Association (SOBA) Prototype. I: Spatial Distribution of the Different Gas Phases and Attenuation by Dust
• The Atlas3D project - XIX. The hot-gas content of early-type galaxies: fast versus slow rotators
• The Steppenwolf: A proposal for a habitable planet in interstellar space
• SCExAO/CHARIS Near-Infrared Direct Imaging, Spectroscopy, and Forward-Modeling of kappa And b: A Likely Young, Low-Gravity Superjovian Companion
• A spectacular giant arc in the massive cluster lens MACSJ1206.2-0847
• Accurate Fundamental Parameters or A, F, and G-type Supergiants in the Solar Neighbourhood
• X-ray studies of the Black Widow Pulsar PSR B1957+20
• A Search for Infall Evidence in EGOs I: the Northern Sample
• Benchmark stars for Gaia: fundamental properties of the Population II star HD140283 from interferometric, spectroscopic and photometric data
• Unexpected Circular Radio Objects at High Galactic Latitude
• Resolving Quiescent Galaxies at $z\gtrsim 2$: I. Search for Gravitationally Lensed Sources and Characterization of their Structure, Stellar Populations, and Line Emission
• On the definition of superclusters
• The enigmatic spin evolution of PSR J0537-6910: r-modes, gravitational waves and the case for continued timing
• Subarcsecond international LOFAR radio images of Arp 220 at 150 MHz: A kpc-scale star forming disk surrounding nuclei with shocked outflows
• Unveiling the Milky Way: A New Technique for Determining the Optical Color and Luminosity of our Galaxy
• Self-lensing Discovery of a $0.2M_{\odot }$ White Dwarf in an Unusually Wide Orbit Around a Sun-like Star
• The Fermi Paradox is Neither Fermis Nor a Paradox
• Multiple rings in the transitional disk of GM Aurigae revealed by VLA and ALMA
• A resolved analysis of cold dust and gas in the nearby edge-on spiral NGC 891
• Jet emission in NGC1052 at radio, optical, and X-ray frequencies
• The Century Survey Galactic Halo Project III: A Complete 4300 deg^2 Survey of Blue Horizontal Branch Stars in the Metal-Weak Thick Disk and Inner Halo
• Gas Mass Fractions and Star Formation in Blue-Sequence E/S0 Galaxies
• Two white dwarfs with oxygen-rich atmospheres
• Chandra Observations and Models of the Mixed-Morphology Supernova Remnant W44: Global Trends
• The Chemical Compositions of Non-Variable Red and Blue Field Horizontal Branch Stars
• The HARPS search for southern extra-solar planets. III. Three Saturn-mass planets around HD 93083, HD 101930 and HD 102117
• An independent distance estimate to CW Leo
• The unbearable opaqueness of Arp 220
• Spatially Resolved [CII] Emission in SPT0346-52: A Hyper-Starburst Galaxy Merger at z~5.7
• Gaia FGK Benchmark Stars: New Candidates At Low-Metallicities
• The Young L Dwarf 2MASS J11193254-1137466 is a Planetary-Mass Binary
• Families of Plausible Solutions to the Puzzle of Boyajian's Star
• Substellar Companions to Seven Evolved Intermediate-Mass Stars
• Parallax and Luminosity Measurements of an L Subdwarf
• First visual orbit for the prototypical colliding-wind binary WR 140
• Resolving the extended atmosphere and the inner wind of Mira ($o$ Ceti) with long ALMA baselines
• Quasar induced galaxy formation: a new paradigm ?
• Resolving the FU Ori System with ALMA: Interacting Twin Disks?
• Exploring Whether Super-Puffs Can Be Explained as Ringed Exoplanets
• The First Post-Kepler Brightness Dips of KIC 8462852
• A Normal Stellar Disk in the Galaxy Malin 1
• Spikey: Self-Lensing Flares from Eccentric SMBH Binaries
• "TNOs are Cool": A survey of the trans-Neptunian region -- VII. Size and surface characteristics of (90377) Sedna and 2010 EK139
• The Carnegie-Chicago Hubble Program. VII. The Distance to M101 via the Optical Tip of the Red Giant Branch Method
• KIC 8462852 Faded at an Average Rate of 0.165+-0.013 Magnitudes Per Century From 1890 To 1989
• Mrk 71/NGC 2366: The nearest Green Pea analog
• High resolution infrared spectra of NGC 6342 and NGC 6528: two moderately reddened Bulge Globular Clusters
• The Stellar Populations of Two Ultra-Diffuse Galaxies from Optical and Near-infrared Photometry
• The Spectral Lag of GRB060505: A Likely Member of the Long Duration Class
• The Most Massive Heartbeat: An In-depth Analysis of ι Orionis
• KIC 8462852 Faded Throughout the Kepler Mission
• Discovery of the Luminous, Decades-Long, Extragalactic Radio Transient FIRST J141918.9+394036
• Habitable Zones of Post-Main Sequence Stars
• The spectroscopic evolution of the symbiotic-like recurrent nova V407 Cygni during its 2010 outburst. I. The shock and its evolution
• Spitzer-IRS Study of the Antennae Galaxies NGC 4038/39
• Discovering the Unexpected in Astronomical Survey Data
• On the detection and tracking of space debris using the Murchison Widefield Array. I. Simulations and test observations demonstrate feasibility
• Parallax and masses of alpha Centauri revisited
• The cluster ages experiment (CASE). V. Analysis of three eclipsing binaries in the globular cluster M4
• A Fast Radio Burst with frequency-dependent polarization detected during Breakthrough Listen observations
• GC-IRS13E - A puzzling association of three early-type stars
• Periodic Optical Variability of Radio Detected Ultracool Dwarfs
• Hunting for treasures among the Fermi unassociated sources: a multi-wavelength approach
• Super-Solar Metallicity Stars in the Galactic Center Nuclear Star Cluster: Unusual Sc, V, and Y Abundances
• The Breakthrough Listen Search for Intelligent Life: A 3.95-8.00 GHz Search for Radio Technosignatures in the Restricted Earth Transit Zone
• Hubble Space Telescope non-detection of PSR J2144-3933: the coldest known neutron star
• Multiwavelength follow-up of a rare IceCube neutrino multiplet
• The puzzling case of the radio-loud QSO 3C 186: a gravitational wave recoiling black hole in a young radio source?
• Dynamical Masses of Eps Ind B and C: Two Massive Brown Dwarfs at the Edge of the Stellar-Substellar Boundary
• Systematic Serendipity: A Test of Unsupervised Machine Learning as a Method for Anomaly Detection
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• Bistable Profile Illumination in Pulsars B0919+06 & B1859+07
• Unveiling the Origin of GRB 090709A: Lack of Periodicity in a Reddened Cosmological Long-Duration Gamma-Ray Burst
• Fermi's Paradox - The Last Challenge for Copernicanism?
• The Araucaria Project: High-precision Cepheid astrophysics from the analysis of variables in double-lined eclipsing binaries
• Ages of the Bulge globular clusters NGC 6522 and NGC 6626 (M28) from HST Proper-motion-cleaned Color-Magnitude Diagrams
• The Radio Synchrotron Background: Conference Summary and Report
• A Catalog of Stellar Unified Properties (CATSUP) for 951 FGK-Stars Within 30 pc
• Relative Likelihood for Life as a Function of Cosmic Time
• Luminosity profiles and sizes of massive star clusters in NGC 7252
• Mass, radius, and composition of the transiting planet 55 Cnc e : using interferometry and correlations
• The host of the SN-less GRB 060505 in high resolution
• Light Curve Analysis of Neon Novae
• HAT-P-67b: An Extremely Low Density Saturn Transiting an F-Subgiant Confirmed via Doppler Tomography
• Cloud structure of three Galactic infrared dark star-forming regions from combining ground and space based bolometric observations
• PSR J2322$-$2650 -- A low-luminosity millisecond pulsar with a planetary-mass companion
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• Benchmark ages for the Gaia benchmark stars
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• Refining the associations of the Fermi Large Area Telescope Source Catalogs
• Fast Radio Bursts from Extragalactic Light Sails
• Outliers from the Mass--Metallicity Relation I: A Sample of Metal-Rich Dwarf Galaxies from SDSS
• The puzzle of the polar structure in NGC 4650A
• The EBLM project III. A Saturn-size low-mass star at the hydrogen-burning limit
• A remarkably large depleted core in the Abell 2029 BCG IC 1101
• Recent Star Formation in Sextans A
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• Evidence against a supervoid causing the CMB Cold Spot
• Chemical abundances in the polar disk of NGC4650A: implications for cold accretion scenario
• Kim 3: an Ultra-faint Star Cluster in the Constellation of Centaurus
• The properties of the Malin 1 galaxy giant disk: A panchromatic view from the NGVS and GUViCS surveys
• Anatomy of the hyper-runaway star LP 40-365 with Gaia
• Prediction of a red nova outburst in KIC 9832227
• Phosphorus-rich stars with unusual abundances are challenging theoretical predictions
• The Molecular Disk in the Cloverleaf Quasar
• Extremely Luminous Water Vapor Emission from a Type 2 Quasar at Redshift z = 0.66
• The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and Formation Mechanism
• SDSS1133: An Unusually Persistent Transient in a Nearby Dwarf Galaxy
• The 2011 Outburst of Recurrent Nova T Pyx: Radio Observations Reveal the Ejecta Mass and Hint at Complex Mass Loss
• The Allen Telescope Array Fly's Eye Survey for Fast Radio Transients
• The Distance and Size of the Red Hypergiant NML Cyg from VLBA and VLA Astrometry
• VLBI astrometry of PSR J2222-0137: a pulsar distance measured to 0.4% accuracy
• Weighing Melnick 34: the most massive binary system known
• The First High-Precision Radial Velocity Search for Extra-Solar Planets
• On the Origin of Sub-Subgiant Stars II: Binary Mass Transfer, Envelope Stripping, and Magnetic Activity
• The Spectral Energy Distribution and Mass-loss Rate of the A-Type Supergiant Deneb
• The eclipsing millisecond pulsar PSR J1740-5340 and its red straggler companion
• A Search for Brief Optical Flashes Associated with the SETI Target KIC 8462852
• The yellow hypergiant HR 5171 A: Resolving a massive interacting binary in the common envelope phase
• Optical and infrared flares from a transient Galactic soft gamma-ray repeater
• GRB070610 : A Curious Galactic Transient
• High-resolution ultraviolet spectroscopy of PG1159-035 with HST and FUSE
• Comment on "A non-interacting low-mass black hole -- giant star binary system"
• Can Life develop in the expanded habitable zones around Red Giant Stars?
• A VLA Search for Radio Signals from M31 and M33
• An Optically Obscured AGN in a Low Mass, Irregular Dwarf Galaxy: A Multi-Wavelength Analysis of J1329+3234
• The First Very Long Baseline Interferometric SETI Experiment
• Low Frequency Observations of the Moon with the Murchison Widefield Array
• SWEET-Cat update and FASMA. A new minimization procedure for stellar parameters using high-quality spectra
• New SETI Sky Surveys for Radio Pulses
• A normal supermassive black hole in NGC 1277
• 2006 Whole Earth Telescope Observations of GD358: A New Look at the Prototype DBV
• The Nine Axes of Merit for Technosignature Searches
• Physical parameters of T dwarfs derived from high-resolution near-infrared spectra
• A 1.05 $M_{\odot }$ Companion to PSR J2222-0137: The Coolest Known White Dwarf?
• Superluminous Spiral Galaxies
• The red dwarf pair GJ65AB: inflated, spinning twins of Proxima
• The Sizes of the Nearest Young Stars
• IC 225: a dwarf elliptical galaxy with a peculiar blue core
• Reverberation mapping of narrow-line Seyfert 1 galaxy I Zwicky 1: black hole mass
• Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search
• The Post-Pericenter Evolution of the Galactic Center Source G2
• Taming the Invisible Monster: System Parameter Constraints for Epsilon Aurigae from the Far-Ultraviolet to the Mid-Infrared
• Super-Eddington Accretion in the WISE-Selected Extremely Luminous Infrared Galaxy W2246-0526
• The Astronomer's Telegram: A Web-based Short-Notice Publication System for the Professional Astronomical Community
• The Near-Infrared Tip of the Red Giant Branch. I. A Calibration in the Isolated Dwarf Galaxy IC 1613
• SPT0346-52: Negligible AGN Activity in a Compact, Hyper-starburst Galaxy at z = 5.7
• A galaxy classification grid that better recognises early-type galaxy morphology
• The fate of the Antennae galaxies
• The Search for Extraterrestrial Intelligence in Earth's Solar Transit Zone
• A search for IceCube events in the direction of ANITA neutrino candidates
• On the kinematic separation of field and cluster stars across the Bulge globular NGC 6528
• Pox 186: an ultracompact galaxy with dominant ionized gas emission
• A search for long-timescale, low-frequency radio transients
• BVI photometry of the very old open cluster Berkeley 17
• Properties of the Eclipsing Double-White Dwarf Binary NLTT 11748
• Massive stars dying alone: The extremely remote environment of SN 2009ip
• The K2 M67 Study: An Evolved Blue Straggler in M67 from K2 Mission Asteroseismology
• Dark spot, Spiral waves and the SW Sex behaviour: it is all about UX Ursae Majoris
• Characterization of the K2-38 planetary system. Unraveling one of the densest planets known to date
• Mass and period limits on the ringed companion transiting the young star J1407
• Space and velocity distributions of Galactic isolated old Neutron stars
• Revisiting Stephan's Quintet with deep optical images
• Star formation histories in mergers: The spatially resolved properties of the early-stage merger LIRGs IC 1623 and NGC 6090
• Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER
• Detailed chemical compositions of the wide binary HD 80606/80607: revised stellar properties and constraints on planet formation
• Theoretical fits of the δCephei light, radius and radial velocity curves
• Discovery of an unusual new radio source in the star-forming galaxy M82: Faint supernova, supermassive blackhole, or an extra-galactic microquasar?
• A Light Curve Analysis of Recurrent and Very Fast Novae in our Galaxy, Magellanic Clouds, and M31
• Updated astrometry and masses of the LUH 16 brown dwarf binary
• Accurate parameters for HD 209458 and its planet from HST spectrophotometry
• Why are some galaxy disks extremely thin?
• Orbital Foregrounds for Ultra-Short Duration Transients
• High-resolution Imaging of the OH Megamaser Emission in IRAS12032+1707 and IRAS14070+0525
• LP 400-22, A very low-mass and high-velocity white dwarf
• SuperWASP Observations of the 2007 Outburst of Comet 17P/Holmes
• The Silurian Hypothesis: Would it be possible to detect an industrial civilization in the geological record?
• OH/IR stars and their superwinds as observed by the Herschel Space Observatory
• A non-thermal pulsed X-ray emission of AR~Scorpii
• The most ancient spiral galaxy: a 2.6-Gyr-old disk with a tranquil velocity field
• A Spectroscopically Unique Main Belt Asteroid: 10537 (1991 RY16)
• The Most Massive Ultra-Compact Dwarf Galaxy in the Virgo Cluster
• Long duration radio transients lacking optical counterparts are possibly Galactic Neutron Stars
• The enigmatic He-sdB pulsator LS IV$-$14${}^{\circ }$116: new insights from the VLT
• A multi-wavelength view of the neutron star binary 1FGL J1417.7--4402: A progenitor to canonical millisecond pulsars
• A puzzling millisecond pulsar companion in NGC 6266
• The Araucaria Project: A study of the classical Cepheid in the eclipsing binary system OGLE LMC562.05.9009 in the Large Magellanic Cloud
• "TNOs are Cool": A survey of the trans-Neptunian region XIV. Size/albedo characterization of the Haumea family observed with Herschel and Spitzer
• Very Compact Dense Galaxy Overdensity with δ ~ 130 Identified at z ~ 8: Implications for Early Protocluster and Cluster-Core Formation
• Planetary companions orbiting M giants HD 208527 and HD 220074
• Dust around R Coronae Borealis stars: I. Spitzer/IRS observations
• Enhanced Halpha activity at periastron in the young and massive spectroscopic binary HD200775
• VERITAS Upper Limit on the VHE Emission from the Radio Galaxy NGC 1275
• Luminous X-ray Flares from Low Mass X-ray Binary Candidates in the Early-Type Galaxy NGC 4697
• Hoag's Object: Evidence for Cold Accretion onto an Elliptical Galaxy
• Evidence for at least three planet candidates orbiting HD20794
• NPOI Observations of the Exoplanet Host kappa Coronae Borealis and Their Implications for the Star's and Planet's Masses and Ages
• A Reanalysis of the Fundamental Parameters and Age of TRAPPIST-1
• A "super" star cluster grown old: the most massive star cluster in the Local Group
• A Failure of Serendipity: the Square Kilometre Array will struggle to eavesdrop on Human-like ETI
• Learning About the Magnetar Swift J1834.9-0846 from its Wind Nebula
• Seyfert's Sextet: A Slowly Dissolving Stephan's Quintet?
• The Allen Telescope Array Twenty-centimeter Survey -- A 700-Square-Degree, Multi-Epoch Radio Dataset -- II: Individual Epoch Transient Statistics
• HI and CO in the circumstellar environment of the S-type star RS Cnc
• Shell-Shocked: The Interstellar Medium Near Cygnus X-1
• A Census of the High-Density Molecular Gas in M82
• Discovery of a Meter-Wavelength Radio Transient in the SWIRE Deep Field: 1046+59
• Automated novelty detection in the WISE survey with one-class support vector machines
• X-ray emission from the planet pulsar B1257+12
• Ejector and propeller spin-down: How might a superluminous supernova millisecond magnetar become the 6.67 hr pulsar in RCW103
• NGC 6791: a probable bulge cluster without multiple populations
• Was 49b: An Overmassive AGN in a Merging Dwarf Galaxy?
• An Opportunistic Search for ExtraTerrestrial Intelligence (SETI) with the Murchison Widefield Array
• Constraints on Feedback in the local Universe: The relation between star formation and AGN activity in early type galaxies
• Discovery of peculiar periodic spectral modulations in a small fraction of solar type stars
• Globular Clusters as Cradles of Life and Advanced Civilizations
• A search for technosignatures from TRAPPIST-1, LHS 1140, and 10 planetary systems in the Kepler field with the Green Bank Telescope at 1.15-1.73 GHz
• COSMOS 5921+0638: Characterization and analysis of a new strong gravitationally lensed AGN
• 11-12 Gyr old White Dwarfs 30 parsecs Away
• The Penn State - Toruń Centre for Astronomy Planet Search stars IV. Dwarfs and the complete sample
• Stellar lifetime and ultraviolet properties of the old metal-rich Galactic open cluster NGC6791: a pathway to understand the UV upturn of elliptical galaxies
• The Breakthrough Listen Search for Intelligent Life: Wide-bandwidth Digital Instrumentation for the CSIRO Parkes 64-m Telescope
• HD 65949: Rosetta Stone or Red Herring
• Atmospheric Habitable Zones in Cool Y Dwarf Atmospheres
• Discovery of an isolated compact elliptical galaxy in the field
• SETI with Gaia: The observational signatures of nearly complete Dyson spheres
• The UV-upturn in brightest cluster galaxies
• New clues on the nature of the companion to PSR~J1740-5340 in NGC6397 from XSHOOTER spectroscopy
• Active Galactic Nuclei: Boon or Bane for Biota?
• Hiding in plain sight: record-breaking compact stellar systems in the Sloan Digital Sky Survey
• Quasi-Periodicities in the Anomalous Emission Events in Pulsars B1859+07 and B0919+06
• The He II Fowler lines and the O III and N III Bowen fluorescence lines in the symbiotic nova RR Tel
• The puzzling properties of the Helium White Dwarf orbiting the millisecond pulsar PSR J1911-5958A in NGC 6752
• A Catalog of the Most Optically Luminous Galaxies at z<0.3: Super Spirals, Super Lenticulars, Super Post-Mergers, and Giant Ellipticals
• Analysis of a Very Massive DA White Dwarf via the Trigonometric Parallax and Spectroscopic Methods
• On the search for artificial Dyson-like structures around pulsars
• A multi-wavelength investigation of candidate milli-second pulsars in unassociated $\gamma$-ray sources
• Further spectroscopic observations of the CSL-1 object
• The Random Transiter -- EPIC 249706694/HD 139139
• Resolving the decades-long transient FIRST J141918.9+394036: an orphan long gamma-ray burst or a young magnetar nebula?
• The recoiling black hole candidate 3C 186: spatially-resolved quasar feedback and further evidence of a blue-shifted broad line region
• HE 0430-2457: a post merger extremely low-mass pre-white dwarf in a wide binary posing as an extreme horizontal branch star
• The application of the Mid-IR radio correlation to the $\hat{G}$ sample and the search for advanced extraterrestrial civilisations
• Discovery of the most ultra-luminous QSO using Gaia, SkyMapper and WISE
• Individual, Model-Independent Masses of the Closest Known Brown Dwarf Binary to the Sun
• The Vanishing & Appearing Sources during a Century of Observations project: I. USNO objects missing in modern sky surveys and follow-up observations of a "missing star"
• Possible signature of hypernova nucleosynthesis in a beryllium rich halo dwarf
• AX J1910.7+0917: the slowest X-ray pulsar
• Determining the mass of the planetary candidate HD 114762 b using Gaia
• The `remarkable' M31 globular cluster 037-B327 revisited
• On the Binary Nature of Dust-encircled BD+20 307
• Pulsation period variations in the RRc Lyrae star KIC 5520878
• Multiwavelength analysis of the Lyman alpha emitting galaxy Haro 2: relation between the diffuse Lyman alpha and soft X-ray emissions
• GD358: three decades of observations for the in-depth asteroseismology of a DBV star
• Design for minimum energy in starship and interstellar communication
• Star formation history of CMa R1: I. Wide-field X-ray study of the young stellar population
• What Sets the Radial Locations of Warm Debris Disks?
• Astrobiological Effects of Gamma-Ray Bursts in the Milky Way Galaxy
• Propulsion of Spacecrafts to Relativistic Speeds Using Natural Astrophysical Sources
• Distinguishing Circumstellar from Stellar Photometric Variability in Eta Carinae
• The Enigmatic (Almost) Dark Galaxy Coma P: Distance Measurement and Stellar Populations from HST Imaging
• Precise Doppler Monitoring of Barnard's Star
• The most metal-poor Galactic globular cluster: the first spectroscopic observations of ESO280-SC06
• Kinematics of the SN Refsdal host revealed by MUSE: a regularly rotating spiral galaxy at z~1.5
• End-to-end interstellar communication system design for power efficiency
• Distances to Galactic OB-stars: Photometry vs. Parallax
• The Energetics and Mass-loss of Mrk33
• PTF 14jg: The Remarkable Outburst and Post-Burst Evolution of a Previously Anonymous Galactic Star
• A Catalog of Calibrator Stars for Next-Generation Optical Interferometers
• T Pyxidis: Death by a Thousand Novae
• Flux density variations of radio sources in M82 over the last 3 decades
• Hubble Imaging Excludes Cosmic String Lens
• Asteroseismic modelling of the subgiant μ Herculis using SONG data: lifting the degeneracy between age and model input parameters
• Molecular Gas and Star Formation in NGC 3077
• A Search for the Near-Infrared Counterpart to GCRT J1745-3009
• The Enigmatic (Almost) Dark Galaxy Coma P: The Atomic Interstellar Medium
• Colliding Winds in and around the Stellar Group IRS 13E at the Galactic Center
• The fifth main sequence magnetic B-type star showing coherent radio emission: is this really a rare phenomenon?
• Circularly polarized emission from the transient bursting radio source GCRT J1745-3009
• The spectral energy distribution of the hyperluminous, hot dust-obscured galaxy W2246$-$0526
• Prior Indigenous Technological Species
• VERITAS Observations of the Microquasar Cygnus X-3
• A Serendipitous MWA Search for Narrow-band and Broad-band Low Frequency Radio Transmissions from 1I/2017 U1 'Oumuamua
• New bright optical spectrophotometric standards: A-type stars from the STIS Next Generation Spectral Library
• Our Sky now and then $-$ searches for lost stars and impossible effects as probes of advanced extra-terrestrial civilisations
• Swift observations of two supergiant fast X-ray transient prototypes in outburst
• Imaging galactic diffuse clouds: CO emission, reddening and turbulent flow in the gas around Zeta Oph
• Systematic investigation of chemical abundances derived using IR spectra obtained with GIANO
• VLTI/AMBER spectro-interferometry of the late-type supergiants V766 Cen (=HR 5171 A), sigma Oph, BM Sco, and HD 206859
• XMM-Newton and Swift observations prove GRB 090709A to be a distant, standard, long GRB
• KIC 9832227: Using Vulcan Data to Negate The 2022 Red Nova Merger Prediction
• A Five-year Spectroscopic and Photometric Campaign on the Prototypical alpha Cygni Variable and A-type Supergiant Star Deneb
• Discovery of a transient ultraluminous X-ray source in the elliptical galaxy M86
• A search for Extraterrestrial Intelligence (SETI) toward the Galactic Anticenter with the Murchison Widefield Array
• Maser Properties of the Enigmatic IRAS Source 19312+1950
• Triggering the formation of the supergiant H II region NGC 604 in M33
• Spectroscopic Orbital Elements for the Helium-Rich Subdwarf Binary PG1544+488
• UBVJHKLM photometry and modeling of R Coronae Borealis
• Tiny Electromagnetic Explosions
• The continued optical to mid-IR evolution of V838 Monocerotis
• SOFIA/HAWC+ View of an Extremely Luminous Infrared Galaxy, WISE1013+6112
• Optical Spectra of Candidate Southern Hemisphere International Celestial Reference Frame (ICRF) radio sources
• Searching for Cool Dust: II. Infrared Imaging of the OH/IR Supergiants, NML Cyg, VX Sgr, S Per and the Normal Red Supergiants RS Per and T Per
• Detection of a Low-frequency Cosmic Radio Transient Using Two LWA Stations
• The Secret Lives of Cepheids: Evolution, Mass Loss, and Ultraviolet Emission of the Long-Period Classical Cepheid $l$ Carinae
• A Quasar microlensing event towards J1249+3449?
• The Stellar Content of the Polar Rings in the Galaxies NGC 2685 and NGC 4650A
• An Updated Ultraviolet Catalog of GALEX Nearby Galaxies
• The HAWC real-time flare monitor for rapid detection of transient events
• A comprehensive near and far ultraviolet spectroscopic study of the hot DA white dwarf G191-B2B
• The Application of Autocorrelation SETI Search Techniques in an ATA Survey
• KIC 2856960: the impossible triple star
• Testing the relativistic Doppler boost hypothesis for supermassive binary black holes candidates via broad emission line profiles
• Red Supergiants, Yellow Hypergiants, and Post-RSG Evolution
• GHRS Observations of Cool, Low-Gravity Stars. VI Mass-Loss Rates and Wind Parameters for M Giants
• Orbital Dynamics of 2020 AV2: the First Vatira Asteroid
• Mid-infrared evolution of eta Car from 1968 to 2018
• Orbital Motion, Variability, and Masses in the T Tauri Triple System
• Disintegration of the Aged Open Cluster Berkeley 17
• Swift observations of unidentified radio sources in the revised Third Cambridge Catalogue
• The Not So Extraordinary Globular Cluster M31 037 - B327
• SGAS 143845.1+145407: A Big, Cool Starburst at Redshift 0.816
• The Enigmatic and Ephemeral M Dwarf System KOI 6705: Cheshire Cat or Wild Goose?
• On the fallback disk around the slowest isolated pulsar, 1E 161348$-$5055
• The unusual radio transient in M82: an SS 433 analogue?
• Pulsations, eruptions, and evolution of four yellow hypergiants
• Molecular and Atomic Gas toward HESS J1745-303 in the Galactic Center: Further Support for the Hadronic Scenario
• Detection of brown dwarf-like objects in the core of NGC3603
• Infrared interferometric three-dimensional diagnosis of the atmospheric dynamics of the AGB star R Dor with VLTI/AMBER
• Geometric Corroboration of the Earliest Lensed Galaxy at z~10.8 from Robust Free-Form Modelling
• The Breakthrough Listen Search for Intelligent Life: Searching Boyajian's Star for Laser Line Emission
• On the nature of the enigmatic object IRAS 19312+1950: A rare phase of massive star formation?
• On the orbital evolution of 2020 AV2, the first asteroid ever observed to go around the Sun inside the orbit of Venus
• Constraining the period of the ringed secondary companion to the young star J1407 with photographic plates
• The Long-Term Future of Space Travel
• Angular Sizes and Effective Temperatures of O-type Stars from Optical Interferometry with the CHARA Array
• Physics of a clumpy lensed galaxy at z=1.6
• The `Cosmic Seagull': a highly magnified disk-like galaxy at z~2.8 behind the Bullet Cluster
• Observing two dark accelerators around the Galactic Centre with Fermi Large Area Telescope
• Explaining the Praesepe blue straggler HD 73666
• The Absolute Flux Distribution of LDS749B
• The Strong Gravitationally Lensed Herschel Galaxy HLock01: Optical Spectroscopy Reveals a Close Galaxy Merger with Evidence of Inflowing Gas
• On the Hubble Space Telescope Trigonometric Parallax of the Dwarf Nova SS Cygni
• Jumping the energetics queue: Modulation of pulsar signals by extraterrestrial civilizations
• On the detectability of a predicted mesolensing event associated with the high proper motion star VB 10
• On the nature of the black-body stars
• Searches for neutrinos from cosmic-ray interactions in the Sun using seven years of IceCube data
• The first Doppler imaging of the active binary prototype RS Canum Venaticorum
• Discovery of periodic modulations in the optical spectra of galaxies, possibly due to ultra-rapid light bursts from their massive central black hole
• The Extraplanar Type II Supernova ASASSN-14jb in the Nearby Edge-on Galaxy ESO 467-G051
• J06587-5558 -- A Very Unusual Polarised Radio Source
• Resolving the Discrepancy of Distance to M60, a Giant Elliptical Galaxy in Virgo
• OT 060420: A Seemingly Optical Transient Recorded by All-Sky Cameras
• Panoramic optical and near-infrared SETI instrument: prototype design and testing
• A deep X-ray view of the Class I YSO Elias 29 with XMM-Newton and NuSTAR
• Astrophysics in 2006
• Constraints on the Surface Magnetic Fields and Age of a Cool Hypergiant: XMM-Newton X-ray Observations of VY CMa
• Exploring masses and CNO surface abundances of red giant stars
• The Distance to the Galaxy Coma P
• Radio sources with ultra-high polarization
• An X-ray Detection of Star Formation In a Highly Magnified Giant Arc
• The Void in the Sculptor Group Spiral Galaxy NGC 247
• Chromatic transit light curves of disintegrating rocky planets
• VVV-WIT-07: another Boyajian's star or a Mamajek's object?
• The Unified Astronomy Thesaurus: Semantic Metadata for Astronomy and Astrophysics
• Detection of thermal radio emission from a single coronal giant
• Kathryns Wheel: A spectacular galaxy collision discovered in the Galactic neighbourhood
• Swift UVOT observations of the 2015 outburst of V404 Cygni
• HI observations of three compact high-velocity clouds around the Milky Way
• On the hierarchical triple nature of the former red nova precursor candidate KIC 9832227
• The Breakthrough Listen Search for Intelligent Life: No Evidence of Claimed Periodic Spectral Modulations in High Resolution Optical Spectra of Nearby Stars
• The hidden HI-massive LIRG HIZOA J0836-43: Inside-out galaxy formation
• A Single-chord Stellar Occultation by the Extreme Trans-Neptunian Object (541132) Leleākūhonua
• Massive star formation in galaxies with excess UV emission
• Today a Duo, But Once a Trio? The Double White Dwarf HS 2220$+$2146 May Be A Post-Blue Straggler Binary
• Lens Flare: Magnified X-Ray Binaries as Passive Beacons in SETI
• Something borrowed, something blue: The nature of blue metal-poor stars inferred from their colours and chemical abundances
• Candidates for non-pulsating stars located in the Cepheid instability strip in the Large Magellanic Cloud based on Strömgren photometry
• X-ray and optical observations of the closest isolated radio pulsar
• Understanding ULX Nebulae in the Framework of Supercritical Accretion
• Discovery of a Possible Cool White Dwarf Companion from the AllWISE Motion Survey
• The Habitable Zone of Kepler-16: Impact of Binarity and Climate Models
• Infrared identification of 2XMM J191043.4+091629.4
• Differential interferometry of the rapid rotator Regulus
• SSSPM J1549$-$3544 Is Not a White Dwarf
• The Angular Diameter of $\lambda$ Boötis}
• Lens Model and Source Reconstruction Reveal the Morphology and Star Formation Distribution in the Cool Spiral LIRG SGAS J143845.1$+$145407
• An Unusual Transient in the Extremely Metal-Poor Galaxy SDSS J094332.35+332657.6 (Leoncino Dwarf)
• The year-long flux variations in Boyajian's star are asymmetric or aperiodic
• The SETI Episode in the 1967 Discovery of Pulsars
• The SERENDIP III 70 cm Search for Extraterrestrial Intelligence
• A Reassessment of Families of Solutions to the Puzzle of Boyajian's Star
• Follow-up observations of X-ray emitting hot subdwarf stars: the compact He-poor sdO star Feige 34

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