Revealing a New Black Widow Binary 4FGL J0336.0+7502

Abstract

We report on a discovery of a promising candidate as a black widow millisecond pulsar binary, 4FGL J0336.0+7502, which shows many pulsar-like properties in the 4FGL-DR2 catalog. Within the 95% error region of the LAT source, we identified an optical counterpart with a clear periodicity at P(orb) = 3.718178(9) hours using the Bohyunsan 1.8-m Telescope, Lulin One-meter Telescope, Canada-France-Hawaii Telescope, and Gemini-North. At the optical position, an X-ray source was marginally detected in the Swift/XRT archival data, and the detection was confirmed by our Chandra/ACIS DDT observation. The spectrum of the X-ray source can be described by a power-law model of Gamma = 1.6+/-0.7 and F(0.3-7keV) = 3.5e-14 erg/cm^2/s. The X-ray photon index and the low X-ray-to-gamma-ray flux ratio (i.e., < 1%) are both consistent with that of many known black widow pulsars. There is also a hint of an X-ray orbital modulation in the Chandra data, although the significance is very low (1.3 sigma). If the pulsar identity and the X-ray modulation are confirmed, it would be the fifth black widow millisecond pulsar binary that showed an orbitally-modulated emission in X-rays.

arXiv comment7 pages, including 5 figures and 2 table. Accepted for publication in ApJ

References in corpus (33)

• HI4PI: A full-sky HI survey based on EBHIS and GASS
• Fermi Large Area Telescope Fourth Source Catalog
• Fermi Large Area Telescope Second Source Catalog
• Fermi Large Area Telescope First Source Catalog
• Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
• The Pan-STARRS1 Database and Data Products
• Formation of black widows and redbacks -- two distinct populations of eclipsing binary millisecond pulsars
• UCAC5: New Proper Motions using Gaia DR1
• PSR J1311-3430: A Heavyweight Neutron Star with a Flyweight Helium Companion
• Intra-Binary Shock Heating of Black Widow Companions
• Classification and Ranking of Fermi LAT Gamma-ray Sources from the 3FGL Catalog using Machine Learning Techniques
• Multi-wavelength emissions from the millisecond pulsar binary PSR J1023+0038 during an accretion active state
• X-Ray Observations of Black Widow Pulsars
• Discovery of a Gamma-ray Black Widow Pulsar by GPU-accelerated Einstein@Home
• X-ray studies of the Black Widow Pulsar PSR B1957+20
• X-ray Census of Millisecond Pulsars in the Galactic field
• NuSTAR observations and broadband spectral energy distribution modeling of the millisecond pulsar binary PSR J1023+0038
• Kepler K2 observations of the transitional millisecond pulsar PSR J1023+0038
• An investigation on the factors affecting machine learning classifications in $\gamma$-ray astronomy
• Discovery of a Redback Millisecond Pulsar Candidate: 3FGL J0212.1+5320
• Multi-wavelength observations of a new redback millisecond pulsar candidate: 3FGL J0954.8-3948
• The first continuous optical monitoring of the transitional millisecond pulsar PSR J1023+0038 with Kepler
• High-Energy Variability of PSR J1311-3430
• Discovery of an ultracompact gamma-ray millisecond pulsar binary candidate
• Face changing companion of the redback millisecond pulsar PSR J1048+2339
• A New Candidate Transitional Millisecond Pulsar in the Sub-luminous Disk State: 4FGL J0407.7--5702
• Discovery of a New Redback Millisecond Pulsar Candidate: 4FGL J0940.3-7610
• A New Likely Redback Millisecond Pulsar Binary with a Massive Neutron Star: 4FGL J2333.1--5527
• The Flare-Dominated Accretion Mode of a Radio-Bright Candidate Transitional Millisecond Pulsar
• Searches for millisecond pulsar candidates among the unidentified Fermi objects
• A Compact X-Ray Emitting Binary in Likely Association with 4FGL J0935.3+0901
• Searches for Pulsar-like Candidates from Unidentified Objects in the Third Catalog of Hard Fermi-LAT (3FHL) sources with Machine Learning Techniques
• A Multi-wavelength search for Black Widows and Redbacks counterparts of candidate $\gamma$-ray millisecond pulsars

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• Neutron star mass estimates from gamma-ray eclipses in spider millisecond pulsar binaries
• A 62-minute orbital period black widow binary in a wide hierarchical triple
• 4FGL J1544.2$-$2554: a new spider pulsar candidate
• Nature of 4FGL J2249.4+6229: Evidence for a redback system with a cool companion and low X-ray and $\gamma$-ray luminosities