1SXPS: A deep Swift X-ray Telescope point source catalog with light curves and spectra

Abstract

We present the 1SXPS (Swift-XRT Point Source) catalog of 151,524 X-ray point-sources detected by the Swift-XRT in 8 years of operation. The catalog covers 1905 square degrees distributed approximately uniformly on the sky. We analyze the data in two ways. First we consider all observations individually, for which we have a typical sensitivity of ~3e-13 erg/cm2/s (0.3--10 keV). Then we co-add all data covering the same location on the sky: these images have a typical sensitivity of ~9e-14 erg/cm2/s (0.3--10 keV). Our sky coverage is nearly 2.5 times that of 3XMM-DR4, although the catalog is a factor of ~1.5 less sensitive. The median position error is 5.5" (90% confidence), including systematics. Our source detection method improves on that used in previous XRT catalogs and we report >68,000 new X-ray sources. The goals and observing strategy of the Swift satellite allow us to probe source variability on multiple timescales, and we find ~30,000 variable objects in our catalog. For every source we give positions, fluxes, time series (in four energy bands and two hardness ratios), estimates of the spectral properties, spectra and spectral fits for the brightest sources, and variability probabilities in multiple energy bands and timescales.

27 pages, 19 figures; accepted for publication in ApJS. The accompanying website, http://www.swift.ac.uk/1SXPS is live; the Vizier entry should be available shortly

References in corpus (7)

• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• The Sloan Digital Sky Survey Quasar Catalog IV. Fifth Data Release
• The first XMM-Newton slew survey catalogue: XMMSL1
• Accurate early positions for Swift GRBS: enhancing X-ray positions with UVOT astrometry
• High precision X-ray logN-logS distributions: implications for the obscured AGN population
• Refined Astrometry and Positions for 179 Swift X-ray Afterglows
• The Swift X-ray Telescope Cluster Survey: data reduction and cluster catalog for the GRB fields

Cited by in corpus (127)

• Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
• Swift and NuSTAR observations of GW170817: detection of a blue kilonova
• Second ROSAT all-sky survey (2RXS) source catalogue
• The ASAS-SN Catalog of Variable Stars I: The Serendipitous Survey
• The XMM-Newton serendipitous survey. VII. The third XMM-Newton serendipitous source catalogue
• A Multimessenger Picture of the Flaring Blazar TXS 0506+056: implications for High-Energy Neutrino Emission and Cosmic Ray Acceleration
• X-ray Emissions from Accreting White Dwarfs: a Review
• Statistical properties of superflares on solar-type stars based on 1-min cadence data
• 2SXPS: An improved and expanded Swift X-ray telescope point source catalog
• Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies
• A Population of Bona Fide Intermediate Mass Black Holes Identified as Low Luminosity Active Galactic Nuclei
• Investigation of two Fermi-LAT gamma-ray blazars coincident with high-energy neutrinos detected by IceCube
• A New, Faint Population of X-ray Transients
• Science objectives of the Einstein Probe mission
• A deep survey of short GRB host galaxies over $z\sim 0-2$: implications for offsets, redshifts, and environments
• Optical spectroscopic observations of $\gamma$-ray blazar candidates VI. Further observations from TNG, WHT, OAN, SOAR and Magellan telescopes
• The NuSTAR Serendipitous Survey: The 40 month Catalog and the Properties of the Distant High Energy X-ray Source Population
• An INTEGRAL overview of High Mass X-ray Binaries: classes or transitions?
• X-ray eruptions every 22 days from the nucleus of a nearby galaxy
• SPIDERS: Selection of spectroscopic targets using AGN candidates detected in all-sky X-ray surveys
• A real-time transient detector and the Living Swift-XRT Point Source catalogue
• Optical Spectroscopic Observations of Gamma-ray Blazar Candidates. V. TNG, KPNO, and OAN Observations of Blazar Candidates of Uncertain Type in the Northern Hemisphere
• Optical spectroscopic observations of gamma-ray blazar candidates II. The 2013 KPNO campaign in the Northern Hemisphere
• Extragalactic fast X-ray transient candidates discovered by Chandra (2000-2014)
• Optical spectroscopic observations of gamma-ray blazar candidates III. The 2013/2014 campaign in the Southern Hemisphere
• Multiwavelength follow-up of a rare IceCube neutrino multiplet
• Optical spectroscopic observations of gamma-ray blazar candidates IV. Results of the 2014 follow-up campaign
• Swift follow-up of the Gravitational Wave source GW150914
• New hard X-ray sources discovered in the ongoing INTEGRAL Galactic Plane survey after 14 years of observations
• The Reflares and Outburst Evolution in the Accreting Millisecond Pulsar SAX J1808.4-3658: a Disk Truncated Near Co-rotation?
• Swift follow-up of gravitational wave triggers: results from the first aLIGO run and optimisation for the future
• A new gamma-ray loud, eclipsing low-mass X-ray binary
• Detection of a Type IIn Supernova in Optical Follow-up Observations of IceCube Neutrino Events
• Refining the associations of the Fermi Large Area Telescope Source Catalogs
• Optical Spectroscopic Observations of Gamma-Ray Blazar Candidates. VII. Follow-up Campaign in the Southern Hemisphere
• Swift-XRT follow-up of gravitational wave triggers during the third aLIGO/Virgo observing run
• Radio continuum emission in the northern Galactic plane: Sources and spectral indices from the THOR survey
• A Joint Chandra and Swift View of the 2015 X-Ray Dust Scattering Echo of V404 Cygni
• Lens Model and Time Delay Predictions for the Sextuply Lensed Quasar SDSS J2222+2745
• The First Year of S-CUBED: The Swift Small Magellanic Cloud Survey
• The Swift Bulge Survey: Motivation, Strategy, and First X-ray Results
• Probabilistic classification of X-ray sources applied to Swift-XRT and XMM-Newton catalogs
• The Young Substellar Companion ROXs 12 B: Near-Infrared Spectrum, System Architecture, and Spin-Orbit Misalignment
• The XMM-Newton serendipitous survey. VIII: The first XMM-Newton serendipitous source catalogue from overlapping observations
• The Open Universe VOU-Blazars tool
• Open Universe for Blazars: a new generation of astronomical products based on 14 years of Swift-XRT data
• The TeV emission of Ap Librae: a hadronic interpretation and prospects for CTA
• The Million Optical - Radio/X-ray Associations (MORX) Catalogue
• Discovery of a Redback Millisecond Pulsar Candidate: 3FGL J0212.1+5320
• The Einstein@Home Gamma-Ray Pulsar Survey II. Source Selection, Spectral Analysis and Multi-wavelength Follow-up
• J0906+6930: a radio-loud quasar in the early Universe
• The QUEST-La Silla AGN Variability Survey: selection of AGN candidates through optical variability
• Swift follow-up of IceCube triggers, and implications for the Advanced-LIGO era
• The nature of fifty Palermo Swift-BAT hard X-ray objects through optical spectroscopy
• Highly variable AGN from the XMM-Newton Slew Survey
• Multi-wavelength observations of a new redback millisecond pulsar candidate: 3FGL J0954.8-3948
• Looking for blazars in a sample of unidentified high-energy emitting Fermi sources
• Constraints to neutron-star kicks in High-Mass X-ray Binaries with Gaia EDR3
• INTEGRAL/IBIS deep extragalactic survey: M81, LMC and 3C 273/Coma fields
• Optical and X-ray early follow-up of ANTARES neutrino alerts
• X-ray counterpart candidates for six new $\gamma$-ray pulsars
• Serendipitous discovery of radio flaring behaviour from a nearby M dwarf with MeerKAT
• A new study on a type Iax stellar remnant and its probable association with SN 1181
• Quasi-periodic oscillations in precursor flares via seismic aftershocks from resonant shattering
• Resolving the circumstellar environment of the Galactic B[e] supergiant star MWC 137 from large to small scales
• New blazars from the cross-match of recent multi-frequency catalogs
• Swift-XRT Follow-up of Gravitational Wave Triggers in the Second Advanced LIGO/Virgo Observing Run
• Hunting extreme BL Lacertae blazars with Fermi-LAT
• A search for hyperluminous X-ray sources in the XMM-Newton source catalog
• Identifying the 3FHL catalog: I. Archival Swift Observations and Source Classification
• Spectral Energy Distributions for TeV Blazars
• Spectroscopic observations of active solar-analog stars having high X-ray luminosity, as a proxy of superflare stars
• A compilation of known QSOs for the Gaia mission
• Sub-arcsec mid-IR observations of NGC 1614: Nuclear star-formation or an intrinsically X-ray weak AGN?
• Two 100 TeV neutrinos coincident with the Seyfert galaxy NGC 7469
• Could a plasma in quasi-thermal equilibrium be associated to the "orphan" TeV flares ?
• Swift J1734.5-3027: a new long type-I X-ray bursting source
• The $\gamma$-ray sky seen at X-ray energies I. Searching for the connection between X-rays and $\gamma$-rays in Fermi BL Lac objects
• Machine Learning applied to Multifrequency Data in Astrophysics: Blazar Classification
• The SWIFT AGN and Cluster Survey I: Number Counts of AGN and Galaxy Clusters
• Swift X-ray and UV Observations of SDSS J141118.31+481257.6 During its First Ever Recorded Superoutburst
• The $\gamma$-ray sky seen at X-ray energies II: the Swift hunt of Fermi BL Lac objects among unidentified gamma-ray sources
• The Intrinsic $\gamma$-ray Emissions of $Fermi$ Blazars
• Galactic Sources Detected in the NuSTAR Serendipitous Survey
• Radio-to-gamma-ray synchrotron and neutrino emission from proton-proton interactions in active galactic nuclei
• The nature of the symbiotic candidate 2MASS J07363415+6538548 in the field of NGC 2403
• Multiwavelength study of the gravitationally lensed blazar QSO B0218+357 between 2016 and 2020
• Search for Continuous and Transient Neutrino Emission Associated with IceCube's Highest-Energy Tracks: An 11-Year Analysis
• A Multi-wavelength search for Black Widows and Redbacks counterparts of candidate $\gamma$-ray millisecond pulsars
• NuSTAR observations of the unidentified INTEGRAL sources: constraints on the Galactic population of HMXBs
• Observations of the $\gamma$-ray pulsar J1932+1916 in X-rays
• The Hubble Catalog of Variables (HCV)
• A Cautionary Tale of Attenuation in Star Forming Regions
• XMMSL1J063045.9-603110: a tidal disruption event fallen into the back burner
• Swift/UVOT+MaNGA (SwiM) Value-added Catalog
• Application of the MST clustering to the high energy gamma-ray sky. IV - Blazar candidates found as possible counterparts of photon clusters
• X-ray properties of two transient ULX candidates in galaxy NGC 7090
• Optical spectroscopic classification of 35 hard X-ray sources from the Swift-BAT 70-month catalogue
• Swift X-Ray and UV Observations of six Gaia Binaries supposedly containing a Neutron Star
• An Optical Study of Two VY Sculptoris-Type Cataclysmic Binary Stars: V704 And and RX J2338+431
• X-ray evolution of the nova V959 Mon suggests a delayed ejection and a non-radiative shock
• AGN feedback in action: a new powerful wind in 1SXPSJ050819.8+172149?
• The Open Universe survey of Swift-XRT GRB fields: a complete sample of HBL blazars
• Discovery of a ~30-Year-Duration Post-Nova Pulsating Supersoft Source in the Large Magellanic Cloud
• GG Carinae: orbital parameters and accretion indicators from phase-resolved spectroscopy and photometry
• The Be/neutron star system Swift J004929.5-733107 in the Small Magellanic Cloud -- X-ray characteristics and optical counterpart candidates
• Powerful Radio Sources in the Southern Sky. II. A SWIFT X-Ray Perspective
• An observational study of rotation and binarity of Galactic O-type runaway stars
• 3xmm j181923.7$-$170616: an x-ray binary with a 408s pulsar
• Identifying the 3FHL Catalog. IV. Swift Observations of Unassociated Fermi-LAT 3FHL Sources
• Monitoring the Extragalactic High Energy Sky
• Extragalactic transient candidates in the Second Swift-XRT Point Source catalogue
• Constraints on VHE gamma-ray emission of Flat Spectrum Radio Quasars with the MAGIC telescopes
• Determining the Nature of Faint X-Ray Sources from the ASCA Galactic Center Survey
• Spectral and timing characterization of the X-ray source 1RXS J194211.9+255552
• XMM-Newton observations of PSR J0554+3107: pulsing thermal emission from a cooling high-mass neutron star
• A multifrequency characterization of the extragalactic hard X-ray sky
• Searching for supermassive black holes binaries within SRG/eROSITA-De I: Properties of the X-ray selected candidates
• Characterisation of AGN from the XMM-Newton Slew Survey
• Kepler data on KIC 7341653, a nearby M dwarf with monster flares and a phase-coherent variability
• Fermi-LAT Discovery of a Gamma-ray Outburst from the Peculiar Compact Steep Spectrum Radiogalaxy 3C 216
• UGPS J194310+183851: an Unusual Optical and X-ray Faint Cataclysmic Variable?
• The Solar Neighborhood. LV. M Dwarf Twin Binaries -- One in Five Twin Sibling Pairs Are Mismatched in Activity and/or Rotation
• Classification of a New X-ray Catalog of Likely Counterparts to 4FGL-DR4 Unassociated Gamma-ray Sources Using a Neural Network
• Swift-XRT follow-up analysis of unidentified hard X-ray sources
• The Swift AGN and Cluster Survey. II. Cluster Confirmation with SDSS Data
• Aspects of astrophysical particle production and beyond the Standard Model phenomenology