X-ray follow-ups of XSSJ12270-4859: a low-mass X-ray binary with gamma ray FERMI-LAT association

Abstract

XSSJ1227.0-4859 is a peculiar, hard X-ray source recently positionally associated to the Fermi-LAT source 1FGLJ1227.9-4852/2FGLJ1227.7-4853. Multi-wavelength observations have added information on this source, indicating a low-luminosity low-mass X-ray binary (LMXB), but its nature is still unclear. To progress in our understanding, we present new X-ray data from a monitoring campaign performed in 2011 with the XMM-Newton, RXTE, and Swift satellites and combine them with new gamma-ray data from the Fermi and AGILE satellites. We complement the study with simultaneous near-UV photometry from XMM-Newton and with previous UV/optical and near-IR data. The X-ray history of XSSJ1227.0-4859 over 7yr shows a persistent and rather stable low-luminosity (~6x10^33 d_{1\,kpc}^2 erg/s) source, with flares and dips being peculiar and permanent characteristics. The associated Fermi-LAT source 2FGLJ1227.7-4853 is also stable over an overlapping period of 4.7\,yr. Searches for X-ray fast pulsations down to msec give upper limits to pulse fractional amplitudes of 15-25% that do not rule out a fast spinning pulsar. The combined UV/optical/near-IR spectrum reveals a hot component at ~13\,kK and a cool one at ~4.6\,kK. The latter would suggest a late-type K2-K5 companion star, a distance range of1.4--3.6kpc and an orbital period of 7--9 h. A near-UV variability (>6\,h) also suggests a longer orbital period than previously estimated. The analysis shows that the X-ray and UV/optical/near-IR emissions are more compatible with an accretion-powered compact object than with a rotational powered pulsar. The X-ray to UV bolometric luminosity ratio could be consistent with a binary hosting a neutron star, but the uncertainties in the radio data may also allow an LMXB black hole with a compact jet. In this case it would be the first associated with a high-energy gamma-ray source.

17 pages, 14 figures, 1 table; Accepted for publication in Astronomy & Astrophysics Main Journal

References in corpus (15)

• The Donor Stars of Cataclysmic Variables
• Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
• Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources
• SuperAGILE: the hard X-ray Imager for the AGILE space mission
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. V. Identification and properties of 21 southern hard X-ray sources
• Chandra X-Ray Observations of Nineteen Millisecond Pulsars in the Globular Cluster 47 Tucanae
• Revisiting the radio/X-ray flux correlation in the black hole V404 Cyg: from outburst to quiescence
• X-ray Variability and Evidence for Pulsations from the Unique Radio Pulsar/X-ray Binary Transition Object FIRST J102347.6+003841
• Periodic Emission from the Gamma-ray Binary 1FGL J1018.6-5856
• Evidence for gamma-ray emission from the low-mass X-ray binary system FIRST J102347.6+003841
• Time-resolved optical observations of five cataclysmic variables detected by INTEGRAL
• RXTE determination of the intermediate polar status of XSS J00564+4548, IGR J17195-4100, and XSS J12270-4859
• Variations in the dip properties of the low-mass X-ray binary XB 1254-69 observed with XMM-Newton and INTEGRAL
• Possible changes of state and relevant timescales for a neutron star in LS I +61°303
• Chandra Observation of the Big Dipper X 1624-490

Cited by in corpus (92)

• Peering into the dark side: magnesium lines establish a massive neutron star in PSR J2215+5135
• Gamma-ray binaries and related systems
• A state change in the low-mass X-ray binary XSS J12270-4859
• Science with e-ASTROGAM (A space mission for MeV-GeV gamma-ray astrophysics)
• Deep radio imaging of 47 Tuc identifies the peculiar X-ray source X9 as a new black hole candidate
• Optical spectroscopy and demographics of redback millisecond pulsar binaries
• X-ray coherent pulsations during a sub-luminous accretion disk state of the transitional millisecond pulsar XSS J12270-4859
• X-ray states of redback millisecond pulsars
• Radio imaging observations of PSR J1023+0038 in an LMXB state
• The ultracompact nature of the black hole candidate X-ray binary 47 Tuc X9
• Identification of the High-Energy Gamma-Ray Source 3FGL J1544.6-1125 as a Transitional Millisecond Pulsar Binary in an Accreting State
• Transitional millisecond pulsars
• X-ray Observations of XSS J12270-4859 in a New Low State: A Transformation to a Disk-Free Rotation-Powered Pulsar Binary
• Long-term observations of the pulsars in 47 Tucanae. I. A study of four elusive binary systems
• NuSTAR Observations of the State Transition of Millisecond Pulsar Binary PSR J1023+0038
• Pulsating in unison at optical and X-ray energies: simultaneous high-time resolution observations of the transitional millisecond pulsar PSR J1023+0038
• Simultaneous Chandra and VLA Observations of the Transitional Millisecond Pulsar PSR J1023+0038: Anti-correlated X-ray and Radio Variability
• A propeller scenario for the gamma-ray emission of low-mass X-ray binaries: The case of XSS J12270-4859
• Unveiling the nature of INTEGRAL objects through optical spectroscopy. X. A new multi-year, multi-observatory campaign
• A Hard X-Ray Power-Law Spectral Cutoff in Centaurus X-4
• The binary millisecond pulsar PSR J1023+0038 during its accretion state - I. Optical variability
• Unveiling the redback nature of the low-mass X-ray binary XSSJ1227.0-4859 through optical observations
• Hard X-ray Cataclysmic Variables
• The Maveric Survey: a Red Straggler Binary with an Invisible Companion in the Galactic Globular Cluster M10
• A universal relation for the propeller mechanisms in magnetic rotating stars at different scales
• Multi-wavelength observations of the transitional millisecond pulsar binary XSSJ12270-4859
• The Effect of Transient Accretion on the Spin-Up of Millisecond Pulsars
• A new gamma-ray loud, eclipsing low-mass X-ray binary
• NuSTAR observations and broadband spectral energy distribution modeling of the millisecond pulsar binary PSR J1023+0038
• A physical scenario for the high and low X-ray luminosity states in the transitional pulsar PSR J1023+0038
• BL Lacertae identifications in a ROSAT-selected sample of Fermi unidentified objects
• Accreting pulsars: mixing-up accretion phases in transitional systems
• The MAVERIC Survey: Chandra/ACIS Catalog of Faint X-ray sources in 38 Galactic globular clusters
• Search for transitions between states in redbacks and black widows using seven years of Fermi-LAT observations
• Prolonged sub-luminous state of the new transitional pulsar candidate CXOU J110926.4-650224
• Broad-band characteristics of seven new hard X-ray selected cataclysmic variables
• X-ray and Optical Study of the Gamma-ray Source 3FGL J0838.8$-$2829: Identification of a Candidate Millisecond Pulsar Binary and an Asynchronous Polar
• On the nature of the hard X-ray sources SWIFTJ1907.3-2050, IGRJ12123-5802 and IGRJ19552+0044
• Discovery of thermonuclear (Type I) X-ray bursts in the X-ray binary Swift J1858.6-0814 observed with NICER and NuSTAR
• Indications of non-conservative mass-transfer in AMXPs
• The peculiar Galactic center neutron star X-ray binary XMM J174457-2850.3
• Multi-band study of RX J0838-2827 and XMM J083850.4-282759: a new asynchronous magnetic cataclysmic variable and a candidate transitional millisecond pulsar
• The nature of fifty Palermo Swift-BAT hard X-ray objects through optical spectroscopy
• Orbital Dynamics of Candidate Transitional Millisecond Pulsar 3FGL J1544.6-1125: An unusually face-on system
• Millisecond radio pulsars with known masses: parameter values and equation of state models
• A New Candidate Transitional Millisecond Pulsar in the Sub-luminous Disk State: 4FGL J0407.7--5702
• A Deep Chandra X-ray Observatory Study of the Millisecond Pulsar Population in the Globular Cluster Terzan 5
• Evidence for hot clumpy accretion flow in the transitional millisecond pulsar PSR J1023+0038
• Different twins in the millisecond pulsar recycling scenario: optical polarimetry of PSR J1023+0038 and XSS J12270-4859
• The MAVERIC survey: A transitional millisecond pulsar candidate in Terzan 5
• The transitional millisecond pulsar IGR J18245-2452 during its 2013 outburst at X-rays and soft gamma-rays
• Fermi Observation of the transitional pulsar binary XSS J12270-4859
• Simultaneous broadband observations and high-resolution X-ray spectroscopy of the transitional millisecond pulsar PSR J1023+0038
• The Flare-Dominated Accretion Mode of a Radio-Bright Candidate Transitional Millisecond Pulsar
• Outflows and spectral evolution in the eclipsing AMXP SWIFT J1749.4-2807 with NICER, XMM-Newton and NuSTAR
• Hard X-ray luminosity functions of cataclysmic variables: Joint Swift/BAT and Gaia data
• An accreting white dwarf displaying fast transitional mode switching
• Investigating the origin of optical and X-ray pulsations of the transitional millisecond pulsar PSR J1023+0038
• The MAVERIC Survey: New compact binaries revealed by deep radio continuum observations of the Galactic globular cluster Terzan 5
• The Swift Bulge Survey: optical and near-IR follow-up featuring a likely symbiotic X-ray binary & a focused wind CV
• A NuSTAR Observation of the Gamma-Ray-Emitting X-ray Binary and Transitional Millisecond Pulsar Candidate 1RXS J154439.4-112820
• Two coexisting families of compact stars: observational implications for millisecond pulsars
• Optical photometry of two transitional millisecond pulsars in the radio pulsar state
• Discovery of X-ray Emission from the Galactic Supernova Remnant G32.8-0.1 with Suzaku
• Evolution of post-Accretion Induced Collapse Binaries: the Effect of Evaporation
• The MAVERIC Survey: Simultaneous Chandra and VLA observations of the transitional millisecond pulsar candidate NGC 6652B
• The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars
• 15 years of Galactic surveys and hard X-ray Background measurements
• NuSTAR and Parkes observations of the transitional millisecond pulsar binary XSS J12270-4859 in the rotation-powered state
• Multiwavelength evidence for a new flare-mode transitional millisecond pulsar
• Multiwavelength study of RX J2015.6+3711: a magnetic cataclysmic variable with a 2-hr spin period
• Mid-UV Studies of the Transitional Millisecond Pulsars XSS J12270-4859 and PSR J1023+0038 During Their Radio Pulsar States
• Search for gamma-ray emission from AE Aquarii with seven years of FERMI-LAT observations
• Optical Light Curve of 4FGL J0935.3+0901: A Flaring Black Widow Candidate
• Application of a new method to study the spin equilibrium of Aql X-1: the possibility of gravitational radiation
• Quasi-Simultaneous Radio/X-ray Observations of the Candidate Transitional Millisecond Pulsar 3FGL J1544.6-1125 During its Low-Luminosity Accretion-Disc State
• Constraining the ellipticity of millisecond pulsars with observed spin-down rates
• Luminous Optical and X-ray Flaring of the Putative Redback Millisecond Pulsar 1FGL J0523.5$-$2529
• On the vanishing orbital X-ray variability of the eclipsing binary millisecond pulsar 47 Tuc W
• X-ray variability of transitional millisecond pulsars: a faint, stable and fluctuating disk
• Cross-match between the latest Swift-BAT and Fermi-LAT catalogs
• Optical spectroscopic classification of 35 hard X-ray sources from the Swift-BAT 70-month catalogue
• The counterpart/s of IGR J20159+3713/SWIFT J2015.9+3715: dissecting a complex region with emission from keV to TeV
• Multiwavelength Evidence for Two New Candidate Transitional Millisecond Pulsars in the Sub-luminous Disk State: 4FGL J0639.1--8009 and 4FGL J1824.2+1231
• The puzzling case of the accreting millisecond X-ray pulsar IGR J00291+5934: flaring optical emission during quiescence
• Gamma-ray orbital modulation of the transitioning millisecond pulsar binary XSS J12270-4859
• X-ray study of high-and-low luminosity modes and peculiar low-soft-and-hard activity in the transitional pulsar XSS J12270-4859
• Hydrodynamical simulations of wind interaction in spider systems : A step toward understanding transitional millisecond pulsars
• The Bursting Pulsar GRO J1744-28: the Slowest Transitional Pulsar?
• Millisecond pulsars phenomenology under the light of graph theory
• Exploration of faint X-ray and radio sources in the massive globular cluster M14: A UV-bright counterpart to Nova Ophiuchus 1938
• Probing multi-band variability and mode switching in the candidate transitional millisecond pulsar 3FGL J1544.6-1125