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View article: Most Rotational Variables Dominated by a Single Bright Feature Are α <sup>2</sup> CVn Stars
Most Rotational Variables Dominated by a Single Bright Feature Are α <sup>2</sup> CVn Stars Open
We previously reported a rare class of variable star light curves isolated from a sample of 4.7 million candidate variables from the ATLAS survey. Dubbed “UCBH” light curves, they have broad minima and narrow, symmetrical maxima, with typi…
View article: Most Rotational Variables Dominated by a Single Bright Feature are $α^2$ CVn Stars
Most Rotational Variables Dominated by a Single Bright Feature are $α^2$ CVn Stars Open
We previously reported a rare class of variable star light curves isolated from a sample of 4.7 million candidate variables from the ATLAS survey. Dubbed `UCBH' light curves, they have broad minima and narrow, symmetrical maxima, with typi…
View article: Wide cool and ultracool companions to nearby stars from pan-STARRS 1
Wide cool and ultracool companions to nearby stars from pan-STARRS 1 Open
We present the discovery of 57 wide (>5″) separation, low-mass (stellar and substellar) companions to stars in the solar neighborhood identified from Pan-STARRS 1 (PS1) data and the spectral classification of 31 previously known companions…
View article: Limits on the Spin-Orbit Angle and Atmospheric Escape for the 22 Myr Old Planet AU Mic b
Limits on the Spin-Orbit Angle and Atmospheric Escape for the 22 Myr Old Planet AU Mic b Open
We obtained spectra of the pre-main-sequence star AU Microscopii during a transit of its Neptune-sized planet to investigate its orbit and atmosphere. We used the high-dispersion near-infrared spectrograph InfraRed Doppler (IRD) on the Sub…
View article: A Pan-STARRS 1 study of the relationship between wide binarity and planet occurrence in the Kepler field
A Pan-STARRS 1 study of the relationship between wide binarity and planet occurrence in the Kepler field Open
The NASA Kepler mission has revolutionized time-domain astronomy and has massively expanded the number of known extrasolar planets. However, the effect of wide multiplicity on exoplanet occurrence has not been tested with this data set. We…
View article: Corrigendum: “Design and operation of the ATLAS Transient Science Server” (2020, PASP, 132, 085002)
Corrigendum: “Design and operation of the ATLAS Transient Science Server” (2020, PASP, 132, 085002) Open
In Smith et al. we published estimates of the volumetric rate of supernovae within 100 Mpc. These were incorrect and we present the correct values in this corrigendum.
View article: NEO Population, Velocity Bias, and Impact Risk from an ATLAS Analysis
NEO Population, Velocity Bias, and Impact Risk from an ATLAS Analysis Open
We estimate the total population of near-Earth objects (NEOs) in the solar system using an extensive, “solar-system-to-pixels” fake-asteroid simulation to debias detections of real NEOs by the ATLAS survey. Down to absolute magnitudes H = …
View article: Comparison of the Physical Properties of the L4 and L5 Trojan Asteroids from ATLAS Data
Comparison of the Physical Properties of the L4 and L5 Trojan Asteroids from ATLAS Data Open
Jupiter has nearly 8000 known co-orbital asteroids orbiting in the L4 and L5 Lagrange points called Jupiter Trojan asteroids. Aside from the greater number density of the L4 cloud, the two clouds are in many ways considered to be identical…
View article: Comparison of the physical properties of the L4 and L5 Trojan asteroids from ATLAS data
Comparison of the physical properties of the L4 and L5 Trojan asteroids from ATLAS data Open
Jupiter has nearly 8000~known co-orbital asteroids orbiting in the L4 and L5 Lagrange points called Jupiter Trojan asteroids. Aside from the greater number density of the L4 cloud the two clouds are in many ways considered to be identical.…
View article: NEO Population, Velocity Bias, and Impact Risk from an ATLAS Analysis
NEO Population, Velocity Bias, and Impact Risk from an ATLAS Analysis Open
We estimate the total population of near-Earth objects (NEOs) in the Solar System, using an extensive, `Solar System to pixels' fake-asteroid simulation to debias detections of real NEOs by the ATLAS survey. Down to absolute magnitudes $H=…
View article: Pan-STARRS Photometric and Astrometric Calibration
Pan-STARRS Photometric and Astrometric Calibration Open
We present the details of the photometric and astrometric calibration of the Pan-STARRS1 3 π Survey. The photometric goals were to reduce the systematic effects introduced by the camera and detectors, and to place all of the observations o…
View article: Pan-STARRS Pixel Processing: Detrending, Warping, Stacking
Pan-STARRS Pixel Processing: Detrending, Warping, Stacking Open
The Pan-STARRS1 (PS1) Science Consortium has carried out a set of imaging surveys using the 1.4 gigapixel GPC1 camera on the PS1 telescope. As this camera is composed of many individual electronic readouts and covers a very large field of …
View article: Pan-STARRS Pixel Analysis: Source Detection and Characterization
Pan-STARRS Pixel Analysis: Source Detection and Characterization Open
Over 3 billion astronomical sources have been detected in the more than 22 million orthogonal transfer CCD images obtained as part of the Pan-STARRS1 3 π survey. Over 85 billion instances of those sources have been automatically detected a…
View article: The Pan-STARRS Data-processing System
The Pan-STARRS Data-processing System Open
The Pan-STARRS data-processing system is responsible for the steps needed to downloaded, archive, and process all images obtained by the Pan-STARRS telescopes, including real-time detection of transient sources such as supernovae and movin…
View article: ASASSN-14ko is a Periodic Nuclear Transient in ESO 253-G003
ASASSN-14ko is a Periodic Nuclear Transient in ESO 253-G003 Open
We present the discovery that ASASSN-14ko is a periodically flaring AGN at the center of the galaxy ESO 253-G003. At the time of its discovery by the All-Sky Automated Survey for Supernovae (ASAS-SN), it was classified as a supernova close…
View article: PS1-STRM: neural network source classification and photometric redshift catalogue for PS1 3π DR1
PS1-STRM: neural network source classification and photometric redshift catalogue for PS1 3π DR1 Open
The Pan-STARRS1 (PS1) 3π survey is a comprehensive optical imaging survey of three quarters of the sky in the grizy broad-band photometric filters. We present the methodology used in assembling the source classification and photometric red…
View article: Beyond Gaia: Asteroseismic Distances of M Giants Using Ground-based Transient Surveys
Beyond Gaia: Asteroseismic Distances of M Giants Using Ground-based Transient Surveys Open
Evolved stars near the tip of the red giant branch show solar-like oscillations with periods spanning hours to months and amplitudes ranging from ∼1 mmag to ∼100 mmag. The systematic detection of the resulting photometric variations with g…
View article: The Foundation Supernova Survey: Measuring Cosmological Parameters with Supernovae from a Single Telescope
The Foundation Supernova Survey: Measuring Cosmological Parameters with Supernovae from a Single Telescope Open
Measurements of the dark energy equation-of-state parameter, w , have been limited by uncertainty in the selection effects and photometric calibration of z < 0.1 Type Ia supernovae (SNe Ia). The Foundation Supernova Survey is designed to l…
View article: Astro2020 APC White Paper: Findings and Recommendations from the AAS Committee on the Status of Women in Astronomy: Towards Eliminating Harassment in Astronomy
Astro2020 APC White Paper: Findings and Recommendations from the AAS Committee on the Status of Women in Astronomy: Towards Eliminating Harassment in Astronomy Open
The Committee on the Status of Women in Astronomy (CSWA) is calling on federal science funding agencies, in their role as the largest sources of funding for astronomy in the United States, to take actions that will end harassment, particul…
View article: PS18kh: A New Tidal Disruption Event with a Non-axisymmetric Accretion Disk
PS18kh: A New Tidal Disruption Event with a Non-axisymmetric Accretion Disk Open
We present the discovery of PS18kh, a tidal disruption event discovered at the center of SDSS J075654.53+341543.6 (d ≃ 322 Mpc) by the Pan-STARRS Survey for Transients. Our data set includes pre-discovery survey data from Pan-STARRS, the A…
View article: Astro2020 APC White Paper: Findings and Recommendations from the AAS Committee on the Status of Women in Astronomy: Advancing the Career Development of Women in Astronomy
Astro2020 APC White Paper: Findings and Recommendations from the AAS Committee on the Status of Women in Astronomy: Advancing the Career Development of Women in Astronomy Open
The Committee on the Status of Women in Astronomy (CSWA) is calling on federal science funding agencies, in their role as the largest sources of funding for astronomy in the United States, to take actions that will advance career developme…
View article: Seeing Double: ASASSN-18bt Exhibits a Two-component Rise in the Early-time K2 Light Curve
Seeing Double: ASASSN-18bt Exhibits a Two-component Rise in the Early-time K2 Light Curve Open
On 2018 February 4.41, the All-Sky Automated Survey for SuperNovae (ASAS-SN) discovered ASASSN-18bt in the K2 Campaign 16 field. With a redshift of z = 0.01098 and a peak apparent magnitude of B max = 14.31, ASASSN-18bt is the nearest and …
View article: Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the Kepler 2 Observations
Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the Kepler 2 Observations Open
Supernova (SN) 2018oh (ASASSN-18bt) is the first spectroscopically confirmed Type Ia supernova (SN Ia) observed in the Kepler field. The Kepler data revealed an excess emission in its early light curve, allowing us to place interesting con…
View article: The ATLAS All-Sky Stellar Reference Catalog
The ATLAS All-Sky Stellar Reference Catalog Open
The Asteroid Terrestrial-impact Last Alert System (ATLAS) observes most of the sky every night in search of dangerous asteroids. Its data are also used to search for photometric variability, where sensitivity to variability is limited by p…
View article: A First Catalog of Variable Stars Measured by the Asteroid Terrestrial-impact Last Alert System (ATLAS)
A First Catalog of Variable Stars Measured by the Asteroid Terrestrial-impact Last Alert System (ATLAS) Open
The Asteroid Terrestrial-impact Last Alert System (ATLAS) carries out its primary planetary defense mission by surveying about 13,000 deg 2 at least four times per night. The resulting data set is useful for the discovery of variable stars…
View article: A Luminous Transient Event in a Sample of WISE-selected Variable AGNs
A Luminous Transient Event in a Sample of WISE-selected Variable AGNs Open
Recently Assef et al. presented two catalogs of active galactic nucleus (AGN) candidates over 30,093 deg 2 selected from the Wide-field Infrared Survey Explorer ( WISE ) observations. From their most reliable sample, Assef et al. identifie…
View article: A nearby super-luminous supernova with a long pre-maximum & “plateau” and strong C II features
A nearby super-luminous supernova with a long pre-maximum & “plateau” and strong C II features Open
Context . Super-luminous supernovae (SLSNe) are rare events defined as being significantly more luminous than normal terminal stellar explosions. The source of the additional power needed to achieve such luminosities is still unclear. Disc…
View article: The Cow: Discovery of a Luminous, Hot, and Rapidly Evolving Transient
The Cow: Discovery of a Luminous, Hot, and Rapidly Evolving Transient Open
We present the ATLAS discovery and initial analysis of the first 18 days of the unusual transient event, ATLAS18qqn/AT2018cow. It is characterized by a high peak luminosity (∼1.7 × 10 44 erg s −1 ), rapidly evolving light curves (>5 mag ri…