Improved background subtraction for the Sloan Digital Sky Survey images

Abstract

We describe a procedure for background subtracting Sloan Digital Sky Survey (SDSS) imaging that improves the resulting detection and photometry of large galaxies on the sky. Within each SDSS drift scan run, we mask out detected sources and then fit a smooth function to the variation of the sky background. This procedure has been applied to all SDSS-III Data Release 8 images, and the results are available as part of that data set. We have tested the effect of our background subtraction on the photometry of large galaxies by inserting fake galaxies into the raw pixels, reanalyzing the data, and measuring them after background subtraction. Our technique results in no size-dependent bias in galaxy fluxes up to half-light radii of 100 arcsec; in contrast, for galaxies of that size the standard SDSS photometric catalog underestimates fluxes by about 1.5 mag. Our results represent a substantial improvement over the standard SDSS catalog results and should form the basis of any analysis of nearby galaxies using the SDSS imaging data.

accepted by the Astronomical Journal

References in corpus (6)

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• SDSS-IV MaNGA: Enhanced Star Formation in Galactic-scale Outflows
• The local Universe in the era of large surveys -- II. Multi-wavelength characterisation of activity in nearby S0 galaxies
• 2D Surface Brightness Modelling of Large 2MASS Galaxies I: Photometry and Structural Parameters
• BUDDI-MaNGA I: A statistical sample of cleanly decomposed bulge and disc spectra
• A Galactic Self-Portrait: Density Structure and Integrated Properties of the Milky Way Disk
• Decomposing galaxies with BANG: an automated morpho-kinematical decomposition of the SDSS-DR17 MaNGA survey
• The Most Massive Early-type Galaxies Exhibit Tidal Features More Frequently in Lower-density Environments
• The HI Structure of the Local Volume Dwarf Galaxy Pisces A
• DESIVAST: A Catalog of Low-Redshift Voids using Data from the DESI DR1 Bright Galaxy Survey
• Dust Attenuation Curve for Local Subgalactic Star-forming Regions
• SDSS-IV MaNGA: the physical origin of off-galaxy H$\alpha$ blobs in the local Universe
• Total and dark mass from observations of galaxy centers with Machine Learning
• The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar and APOGEE-2 Data
• SDSS-IV/MaNGA: Can impulsive gaseous inflows explain steep oxygen abundance profiles \& anomalously-low-metallicity regions?
• Solar flare catalog from 3 years of Chandrayaan-2 XSM observations
• Sub-galactic scaling relations with T${}_{\mathrm{e}}$-based metallicity of low metallicity regions in galaxies: metal-poor gas inflow may have important effects?
• Dependence of the ratio of total to visible mass on observable properties of SDSS MaNGA galaxies
• The ISM scaling relations using inner HI and an application of estimating dust mass
• X-ray Properties of Optically Variable Low-mass AGN Candidates
• Quantifying the Active Galactic Nuclei Fraction in Cosmic Voids via Mid-Infrared Variability
• The circular velocity and halo mass functions of galaxies in the nearby Universe
• SDSS IV MaNGA -- Star-Formation Driven Biconical Outflows in Face-On Galaxies
• The Low Redshift survey at Calar Alto (LoRCA)
• UGC 7639: a Dwarf Galaxy in the Canes Venatici I Cloud
• MASCOT: Molecular gas depletion times and metallicity gradients -- evidence for feedback in quenching active galaxies
• Identification and Quenching of Nugget Galaxies in the RESOLVE Survey at z = 0
• The diverse quenching pathways of post-starburst galaxies in SDSS-IV MaNGA
• Identification of galaxy shreds in large photometric catalogs using Convolutional Neural Networks
• A Full Accounting of the Visible Mass in SDSS MaNGA Disk Galaxies
• On the Origin of the Variety of Velocity Dispersion Profiles of Galaxies
• Star formation histories of massive red spiral galaxies in the local universe
• Nebular Dust Attenuation with the Balmer and Paschen Lines based on the MaNGA Survey
• The Impact of Bars, Spirals and Bulge-Size on Gas-Phase Metallicity Gradients in MaNGA Galaxies
• Beyond diagnostic-diagrams: A critical exploration on the classification of ionization processes
• A Dual Active Black Hole Candidate with Mass Ratio ~7:1 in a Disk Galaxy
• Observing Correlations Between Dark Matter Accretion and Galaxy Growth: II. Testing the Impact of Galaxy Mass, Star Formation Indicator, and Neighbour Colours
• A Spatially Resolved Evolutionary Sequence of Multi-wavelength AGN Host Galaxies
• The spatial distribution of dwarf and giant galaxies in and around Virgo cluster
• Galaxy Spin Alignment with Tidal Fields in the SDSS-IV MaNGA Survey
• An analytical model to kinematically identify thin discs in MaNGA galaxies
• Stellar CoRGI in MaNGA: Stellar Counterrotating Galaxies Identified in the MaNGA Survey
• Neural Posterior Estimation for Cataloging Astronomical Images with Spatially Varying Backgrounds and Point Spread Functions
• MASCOT -- An ESO-ARO legacy survey of molecular gas in nearby SDSS-MaNGA galaxies: I. first data release, and global and resolved relations between H_2 and stellar content
• Cluster environment quenches the star formation of low-mass satellite galaxies from the inside-out
• SDSS-IV MaNGA: Stellar rotational support in disk galaxies vs. central surface density and stellar population age
• Neutral Hydrogen Mass in Galaxies Estimated via Optical Spectroscopy
• The origin of double-peaked narrow emission-line galaxies in MaNGA Survey
• Dark matter in ALFALFA galaxies: Investigating galaxy-halo connection
• Properties of barred galaxies in the MaNGA galaxy survey
• Correcting the fiber-aperture bias affecting galaxy stellar populations in the Sloan Digital Sky Survey. Aperture corrections to absorption indices based on CALIFA integral field observations
• Analysis of the Effect of Bars on Environmental Dependence of Disc Galaxies with MaNGA Survey Data
• Spatially Resolved Kinematics of Post-starburst Galaxies
• IQ Collaboratory III: The Empirical Dust Attenuation Framework -- Taking Hydrodynamical Simulations with a Grain of Dust
• SDSS-IV MaNGA: How the stellar populations of passive central galaxies depend on stellar and halo mass
• The Exploration of Local VolumE Satellites (ELVES) Survey: A Nearly Volume-Limited Sample of Nearby Dwarf Satellite Systems
• Virgo Filaments VI: H$\alpha$ clumps in the filaments around the Virgo galaxy cluster
• Dwarf Galaxy Number Counts within 25 Mpc: Predictions from Local Group Analogues in TNG50
• Testing subhalo abundance matching with galaxy kinematics
• Extending the SAGA Survey (xSAGA) I: Satellite Radial Profiles as a Function of Host Galaxy Properties
• Morphologies for DECaLS Galaxies through a combination of non-parametric indices and machine learning methods: A comprehensive catalog using the Galaxy Morphology Extractor (galmex) code
• Contrasting evolutionary pathways of fast- and slow-rotating galaxies in the green valley
• Toward Understanding the Evolutionary Role of Star-forming Lenticular Galaxies: New HI Detections and Comparison with Quiescent S0s and Red Spirals
• The peculiar filamentary HI structure of NGC 6145
• A MaNGA about the Legacy I: Connecting the Assembly of Stellar Halo with the Average Star Formation History in Low-Redshift Massive Galaxies
• Stellar Populations of Spectroscopically Decomposed Bulge-Disk for S0 Galaxies from the CALIFA survey
• Mapping Nearby Galaxies with Apache Point Observatory: Group and field galaxies' morphologies in the colour-magnitude plane
• Preliminary census of galaxies in the LISA localisation volume: I. Searching for LISA candidate massive black hole binary merger hosts using Sloan Digital Sky Survey photometry
• Investigating the Impacts of AGN Activities on Dwarf Galaxies with FAST HI Observations