A photometricity and extinction monitor at the Apache Point Observatory

Abstract

An unsupervised software ``robot'' that automatically and robustly reduces and analyzes CCD observations of photometric standard stars is described. The robot measures extinction coefficients and other photometric parameters in real time and, more carefully, on the next day. It also reduces and analyzes data from an all-sky $10\mu m$ camera to detect clouds; photometric data taken during cloudy periods are automatically rejected. The robot reports its findings back to observers and data analysts via the World-Wide Web. It can be used to assess photometricity, and to build data on site conditions. The robot's automated and uniform site monitoring represents a minimum standard for any observing site with queue scheduling, a public data archive, or likely participation in any future National Virtual Observatory.

arXiv commentaccepted for publication in AJ

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• The H alpha Luminosity Function of Morphologically Classified Galaxies in the Sloan Digital Sky Survey
• Topology of structure in the Sloan Digital Sky Survey: model testing
• Stellar Population Variations in the Milky Way's Stellar Halo
• New Close Binary Systems from the SDSS-I (Data Release Five) and the Search for Magnetic White Dwarfs in Cataclysmic Variable Progenitor Systems
• Discovery of New Ultracool White Dwarfs in the Sloan Digital Sky Survey
• Galaxy Activity in Merging Binary Galaxy Clusters
• Discovery of Eight z ~ 6 Quasars in the Sloan Digital Sky Survey Overlap Regions
• The Bright End of the Luminosity Function of Red Sequence Galaxies
• The kinematics of late type stars in the solar cylinder studied with SDSS data
• The Sloan Digital Sky Survey: The Cosmic Spectrum and Star-Formation History
• A Simple Likelihood Method for Quasar Target Selection
• Morphological Classification of Galaxies using Photometric Parameters: the Concentration index versus the Coarseness parameter
• SDSS J0903+5028: A New Gravitational Lens
• The SDSS u-band Galaxy Survey: Luminosity functions and evolution
• Panchromatic Properties of 99,000 Galaxies Detected by SDSS, and (some by) ROSAT, GALEX, 2MASS, IRAS, GB6, FIRST, NVSS and WENSS Surveys
• The UNAM-KIAS Catalog of Isolated Galaxies
• Two-Dimensional Topology of the Sloan Digital Sky Survey
• A Detailed Model Atmosphere Analysis of Cool White Dwarfs in the Sloan Digital Sky Survey
• The Structure of the Sagittarius Stellar Stream as Traced by Blue Horizontal Branch Stars
• Correlations of Quasar Optical Spectra with Radio Morphology
• Non-detection of a statistically anisotropic power spectrum in large-scale structure
• Selection of Metal-poor Giant Stars Using the Sloan Digital Sky Survey Photometric System
• Numerical Color-Magnitude Diagram Analysis of SDSS Data and Application to the New Milky Way satellites
• Intrinsic alignments in redMaPPer clusters -- I. Central galaxy alignments and angular segregation of satellites
• X-Ray-Emitting Stars Identified from the ROSAT All-Sky Survey and the Sloan Digital Sky Survey
• Precision cluster mass determination from weak lensing
• Systematic effects in large-scale angular power spectra of photometric quasars and implications for constraining primordial nongaussianity
• A search for the most massive galaxies: Double Trouble?
• Variable Faint Optical Sources Discovered by Comparing POSS and SDSS Catalogs
• A Systematic Search for High Surface Brightness Giant Arcs in a Sloan Digital Sky Survey Cluster Sample
• Three-Dimensional Genus Statistics of Galaxies in the SDSS Early Data Release
• A Measurement of the Rate of Type Ia Supernovae in Galaxy Clusters from the SDSS-II Supernova Survey
• Galaxy And Mass Assembly (GAMA): the red fraction and radial distribution of satellite galaxies
• Bivariate Galaxy Luminosity Functions in the Sloan Digital Sky Survey
• The Lopsidedness of Present-Day Galaxies: Results from the Sloan Digital Sky Survey
• Incorporating Photometric Redshift Probability Density Information into Real-Space Clustering Measurements
• Photometric Redshift Probability Distributions for Galaxies in the SDSS DR8
• Galaxy Orbits for Galaxy Clusters in Sloan Digital Sky Survey and 2dF Galaxy Redshift Survey
• Evolution of the Colour--Radius Relation and the Morphology--Radius Relation in the SDSS Galaxy Clusters
• L Dwarfs Found in Sloan Digital Sky Survey Commissioning Data II. Hobby-Eberly Telescope Observations
• Two Rare Magnetic Cataclysmic Variables with Extreme Cyclotron Features Identified in the Sloan Digital Sky Survey
• Acceleration and Substructure Constraints in a Quasar Outflow
• The Mass Function of Void Galaxies in the SDSS Data Release 2
• Morphological Classification of Galaxies by Shapelet Decomposition in the Sloan Digital Sky Survey
• A Mismatch in the Ultraviolet Spectra between Low-Redshift and Intermediate-Redshift Type Ia Supernovae as a Possible Systematic Uncertainty for Supernova Cosmology
• SDSS J0246-0825: A New Gravitationally Lensed Quasar from the Sloan Digital Sky Survey
• Post common envelope binaries from the SDSS. VI. SDSS J120615.73+510047.0: a new low accretion rate magnetic binary
• Precision Measurements of the Cluster Red Sequence using an Error Corrected Gaussian Mixture Model
• The Sloan Digital Sky Survey Quasar Lens Search. IV. Statistical Lens Sample from the Fifth Data Release
• The Small-scale Clustering of Luminous Red Galaxies via Cross-Correlation Techniques
• SDSS J115517.35+634622.0: A Newly Discovered Gravitationally Lensed Quasar
• Improved optical mass tracer for galaxy clusters calibrated using weak lensing measurements
• Detecting Galaxy-Filament Alignments in the Sloan Digital Sky Survey III
• Photometric characterization of a well defined sample of isolated galaxies in the context of the AMIGA project
• SDSS J1335+0118: A New Two-Image Gravitational Lens
• Spatially Resolved Galaxy Star Formation and its Environmental Dependence I
• Evolution of H${}_2$O, CO, and CO${}_2$ Production in Comet C/2009 P1 Garradd During the 2011-2012 Apparition
• Radial and 2D Colour Properties of E+A Galaxies
• The Luminosity, Colour and Morphology dependence of galaxy filaments in the Sloan Digital Sky Survey Data Release Four
• A Balmer-line Broad Absorption Line Quasar
• Candidate Disk Wide Binaries in the Sloan Digital Sky Survey
• Average Properties of a Large Sample of z_abs ~ z_em associated Mg II Absorption Line Systems
• SDSS J0806+2006 and SDSS J1353+1138: Two New Gravitationally Lensed Quasars from the Sloan Digital Sky Survey
• The SDSS Coadd: A Galaxy Photometric Redshift Catalog
• A morphology revaluation of galaxies in common from the Catalog of Isolated Galaxies and the Sloan Digital Sky Survey (DR6)
• Detection of intrinsic cluster alignments to 100 Mpc/h in the SDSS
• HI Selected Galaxies in the Sloan Digital Sky Survey I: Optical Data
• Five New High-Redshift Quasar Lenses from the Sloan Digital Sky Survey
• Luminosity Functions of Type Ia Supernovae and their Host Galaxies from the Sloan Digital Sky Survey
• Galaxy And Mass Assembly (GAMA): The 325 MHz Radio Luminosity Function of AGN and Star Forming Galaxies
• RASS-SDSS Galaxy Cluster Survey. VI. The dependence of the cluster SFR on the cluster global properties
• Quantitative Morphology of Galaxies from the SDSS I: Luminosity in Bulges and Disks
• A Catalog of Very Isolated Galaxies from the SDSS Data Release 1
• The Probability Distribution of the Lya transmitted flux from a sample of SDSS quasars
• VLT+UVES Spectroscopy of the CaII LoBAL Quasar SDSS J030000.56+004828.0
• Eight New Quasar Lenses from the Sloan Digital Sky Survey Quasar Lens Search
• A Wide-Field View of Leo II -- A Structural Analysis Using the SDSS
• Insight Into the Formation of the Milky Way Through Cold Halo Substructure. III. Statistical Chemical Tagging in the Smooth Halo
• A Photometric Metallicity Estimate of the Virgo Stellar Overdensity
• Discovery of Four Gravitationally Lensed Quasars from the Sloan Digital Sky Survey
• Detection of Intergalactic HeII Absorption at Redshift 3.5
• Astrometric Redshifts for Quasars
• Broadband Optical Properties of Massive Galaxies: the Dispersion Around the Field Galaxy Color-Magnitude Relation Out to z~0.4
• SDSSJ102111.02+491330.4: A Newly Discovered Gravitationally Lensed Quasar
• Candidate Isolated Neutron Stars and Other Optically Blank X-ray Fields Identified from the ROSAT All-Sky and Sloan Digital Sky Surveys
• Spectral Variability of Quasars in the Sloan Digital Sky Survey. II: The C IV Line
• Model Atmosphere Analysis of the Weakly Magnetic DZ White Dwarf G165-7
• Extinction in Star-Forming Disk Galaxies from Inclination-Dependent Composite Spectra
• The Vertical Metallicity Gradient of the Milky Way Disk: Transitions in [a/Fe] Populations
• Modelling narrow-line regions of active galaxies in the Sloan Digital Sky Survey - I.Sample selection and physical conditions
• A High Yield of New Sightlines for the Study of Intergalactic Helium: Far-UV-Bright Quasars from SDSS, GALEX, and HST
• The Close Binary Fraction of Dwarf M Stars
• The age-redshift relation for Luminous Red Galaxies in the Sloan Digital Sky Survey
• Additional Ultracool White Dwarfs Found in the Sloan Digital Sky Survey
• Maximum Likelihood Fitting of Tidal Streams With Application to the Sagittarius Dwarf Tidal Tails
• The effect of FIR emission from SDSS galaxies on the SFD Galactic extinction map
• Merging Galaxies in the SDSS EDR
• Determining the Lensing Fraction of SDSS Quasars: Methods and Results from the EDR
• New UltraCool and Halo White Dwarf Candidates in SDSS Stripe 82
• The UV, Optical, and IR Properties of SDSS Sources Detected by GALEX
• Color Dependence in the Spatial Distribution of Satellite Galaxies
• Insight Into the Formation of the Milky Way Through Cold Halo Substructure. II. The Elemental Abundances of ECHOS
• Two New Gravitationally Lensed Double Quasars from the Sloan Digital Sky Survey
• The Optical and Near-Infrared Properties of 2837 Quasars in the UKIRT Infrared Deep Sky Survey (UKIDSS)
• SEGUE-2 Limits on Metal-Rich Old-Population Hypervelocity Stars In the Galactic Halo
• The V1647 Ori (IRAS 05436-0007) Protostar and its Environment
• A Nearby Old Halo White Dwarf Candidate from the Sloan Digital Sky Survey
• Discovery of a Gravitationally Lensed Quasar from the Sloan Digital Sky Survey: SDSS J133222.62+034739.9
• Properties of Disks and Bulges of Spiral and Lenticular Galaxies in the Sloan Digital Sky Survey
• Characterisation of Sloan Digital Sky Survey Stellar Photometry
• Measuring NIR Atmospheric Extinction Using a Global Positioning System Receiver
• Two More Candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Survey
• Large Scale Clustering of Sloan Digital Sky Survey Quasars: Impact of the Baryon Density and the Cosmological Constant
• Fourier Phase Analysis of SDSS Galaxies
• Mass models and environment of the new quadruply lensed quasar SDSS J1330+1810
• E+A and Companion Galaxies - I : A Catalogue and Statistics
• Cross-Correlation of the Extragalactic Gamma-ray Background with Luminous Red Galaxies
• Halo Occupation Distribution Modeling of Green Valley Galaxies
• A Survey of Open Clusters in the u'g'r'i'z' Filter System: III. Results for the Cluster NGC 188
• The near-IR properties and continuum shapes of high redshift quasars from the Sloan Digital Sky Survey
• SDSS Survey for Resolved Milky Way Satellite Galaxies II: High-Velocity Clouds in the Early Data Release
• Wolf-Rayet Galaxies in the Sloan Digital Sky Survey: the metallicity dependence of the initial mass function
• Spatial Variations of Galaxy Number Counts in the Sloan Digital Sky Survey. II. Test of Galactic Extinction in High Extinction Regions
• Evolution of the u-band luminosity function from redshift 1.2 to 0
• The ChaMP Extended Stellar Survey (ChESS): Photometric and Spectroscopic Properties of Serendipitously Detected Stellar X-ray Sources
• The Milky Way's stellar halo - lumpy or triaxial?
• Atmospheric Extinction Coefficients and Night Sky Brightness At the Xuyi Observational Station
• The Redshift of a Lensing Galaxy in PMN J0134-0931
• Evolution of the Galaxy Luminosity Function at z < 0.3
• Extremely faint high proper motion objects from SDSS stripe 82 - Optical classification spectroscopy of about 40 new objects
• Lensing Probabilities for Spectroscopically Selected Galaxy-Galaxy Strong Lenses
• Candidate spectroscopic binaries in the Sloan Digital Sky Survey
• The Stripe 82 1-2 GHz Very Large Array Snapshot Survey: Multiwavelength Counterparts
• A Sample of Candidate Radio Stars in FIRST and SDSS
• All-sky Relative Opacity Mapping Using Night Time Panoramic Images
• The Sloan Nearby Cluster Weak Lensing Survey
• Variable Point Sources in Sloan Digital Sky Survey Stripe 82. I. Project Description and Initial Catalog (0 h < R.A. < 4 h)
• The Sloan Digital Sky Survey
• A New Quadruply Lensed Quasar: SDSSJ125107.57+293540.5
• The Galaxy Cross-Correlation Function as a Probe of the Spatial Distribution of Galactic Satellites
• Quasar-Galaxy Clustering through Projected Galaxy Counts at z=0.6-1.2
• Lopsided Satellite Distributions around Isolated Host Galaxies
• Ten More New Sightlines for the Study of Intergalactic Helium, and Hundreds of Far-UV-Bright Quasars, from SDSS, GALEX, and HST
• Observational Constraints on Water Sublimation from 24 Themis and 1 Ceres
• Detection of spatial correlations of fundamental plane residuals, and cosmological implications
• Towards a fully consistent Milky Way disc model - II. The local disc model and SDSS data of the NGP region
• HI Selected Galaxies in the Sloan Digital Sky Survey II: The Colors of Gas-Rich Galaxies
• Seeing in the dark -- I. Multi-epoch alchemy
• Tracers of chromospheric structure. I. CaII H$\&$K emission distribution of 13000 F, G and K stars in SDSS DR7 spectroscopic sample
• Probing Spectroscopic Variability of Galaxies & Narrow-Line Active Galactic Nuclei in the Sloan Digital Sky Survey
• Spatial Variations of Galaxy Number Counts in the SDSS I.: Extinction, Large-Scale Structure and Photometric Homogeneity
• The stellar metallicity distribution in intermediate latitude fields with BATC and SDSS data
• A calibration map for Wide Field Imager photometry
• Estimation of Galactic model parameters with the SDSS and metallicity distribution in two fields in the anti-centre direction of the Galaxy
• Fundamental Plane of BOSS galaxies: Correlations with galaxy properties, density field and impact on RSD measurements
• The star formation history and chemical evolution of star forming galaxies in the nearby universe
• Morphological Classification of Galaxies by Shapelet Decomposition in the Sloan Digital Sky Survey II: Multiwavelength Classification
• Nitrogen Production in Starburst Galaxies Detected by GALEX
• Sloan/Johnson-Cousins/2MASS Color Transformations for Cool-Stars
• Morphological classification of galaxies and its relation to physical properties
• Quasars probing quasars X: The quasar pair spectral database
• Discovery of Four Doubly Imaged Quasar Lenses from the Sloan Digital Sky Survey
• The Effect of Variability on the Estimation of Quasar Black Hole Masses
• Are galaxies with AGN a transition population?
• Spectroscopic Determination of the Low Redshift Type Ia Supernova Rate from the Sloan Digital Sky Survey
• Evolution of the Most Massive Galaxies to z ~ 0.6: II. The link between radio AGN activity and star formation
• The statistical properties of galaxy morphological types in compact groups of Main galaxies from the SDSS Data Release 4
• Photometric calibration for the Beijing-Arizona Sky Survey and Mayall z-band Legacy Survey
• Binary Contamination in the SEGUE sample: Effects on SSPP Determinations of Stellar Atmospheric Parameters
• Tile or Stare? Cadence and Sky Monitoring Observing Strategies that Maximize the Number of Discovered Transients
• The Color Selection of Quasars from Redshifts 5 to 10: Cloning and Discovery
• A Lyman-alpha-only AGN from the Sloan Digital Sky Survey
• Topology of Luminous Red Galaxies from the Sloan Digital Sky Survey
• The Age-Redshift Relation For Luminous Red Galaxies Obtained From the Full Spectrum Fitting and Its Cosmological Implications
• The formation of bulges and black holes: lessons from a census of active galaxies in the SDSS
• Measuring the luminosity and virial black hole mass dependence of quasar-galaxy clustering at z ~ 0.8
• Evolution of H${}_2$O Production in Comet C/2012 S1 (ISON) as Inferred from Forbidden Oxygen and OH Emission
• Gravitational Nanolensing from Subsolar Mass Dark Matter Halos
• Transformations between WISE, 2MASS, SDSS and BVRI photometric systems: I. Transformation equations for dwarfs
• The ensemble optical variability of type-1 AGN in the Sloan Digital Sky Survey Data Release 7
• Improved Photometric Calibrations for Red Stars Observed with the SDSS Photometric Telescope
• The Galaxy Stellar Mass Function and Low Surface Brightness Galaxies from Core-Collapse Supernovae
• The local environmental dependence of galaxy properties in the volume-limited sample of Main Galaxies from the SDSS Data Release 5
• XMM-Newton and optical follow-up observations of three new polars from the Sloan Digital Sky Survey
• SDSS J210014.12+004446.0: A New Dwarf Nova with Quiescent Superhumps?
• A Precision Photometric Comparison between SDSS-II and CSP Type Ia Supernova Data
• A Search for Planetary Nebulae With the SDSS: the outer regions of M31
• Color-Induced Displacement double stars in SDSS
• Source Matching in the SDSS and RASS: Which Galaxies are Really X-ray Sources?
• SDSS J133401.39+331534.3: A New Subarcsecond Gravitationally Lensed Quasar
• Lopsided Satellite Distributions around Isolated Host Galaxies in a LCDM Universe
• The Extragalactic Distance Scale without Cepheids IV
• A Quasar Without Broad Lyman-alpha Emission
• Detection of Far Infrared Emission from Galaxies and Quasars in the Galactic Extinction Map by Stacking Analysis
• Identifying High Metallicity M Giants at Intragroup Distances with SDSS
• VLT + UVES Spectroscopy of the Low-Ionization Intrinsic Absorber in SDSS J001130.56+005550.7
• SDSS Catalog of Stars in the Draco Dwarf Spheroidal Galaxy
• The quasar-galaxy cross SDSS J1320+1644: A probable large-separation lensed quasar
• Current star formation in early-type galaxies and the K+A phenomenon
• The Southern Flanking Fields of the 25 Orionis Group
• The Differences of Star Formation History Between Merging Galaxies and Field Galaxies in the EDR of the SDSS
• Completeness - I. Revised, reviewed and revived
• A Search for Period Changes in Delta Scuti Stars with the Super-LOTIS Sky Patrol System
• Photometric Accretion Signatures Near the Substellar Boundary
• Satellite galaxies in the Illustris-1 simulation: anisotropic locations around relatively isolated hosts
• Transformations between 2MASS, SDSS and BVI photometric systems for late-type giants
• The Infrared Cloud Monitor for the MAGNUM Robotic Telescope at Haleakala
• SDSS Pre-Burst Observations of Recent Gamma-Ray Burst Fields
• Fragile Binary Candidates in the SDSS DR8 spectroscopic archive
• Software design for panoramic astronomical pipeline processing
• SDSSJ103913.70+533029.7: A Super Star Cluster in the Outskirts of a Galaxy Merger
• The host galaxies of radio-loud AGN: colour structure
• Colour Transformations between BVRc and g'r'i' Photometric Systems for Giant Stars
• An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data
• Modeling the anomaly of surface number densities of galaxies on the Galactic extinction map due to their FIR emission contamination
• Keck/Deimos Spectroscopy of a GALEX UV Selecte Sample from the Medium Imaging Survey
• Image Stacking Analysis of SDSS Galaxies with AKARI Far-Infrared Surveyor Maps at 65μm, 90μm, and 140μm
• Particle Physics in the Sky and Astrophysics Underground: Connecting the Universe's Largest and Smallest Scales
• Statistical Properties of Blue Horizontal Branch Stars in the Spheroid: Detection of a Moving Group approximately 50 kpc from the Sun
• Exploring the Variable Sky with the Sloan Digital Sky Survey
• Extreme variability quasars from the Sloan Digital Sky Survey and the Dark Energy Survey
• Robust detection of CID double stars in SDSS