SIMBAD references

2021ApJ...911...92L - Astrophys. J., 911, 92-92 (2021/April-3)

Revealing a new black widow binary 4FGL J0336.0+7502.

LI K.-L., YAP Y.X.J., HUI C.Y. and KONG A.K.H.

Abstract (from CDS):

We report on the discovery of a promising candidate for a black widow (BW) 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 Porb = 3.718178(9) hr using the Bohyunsan 1.8 m Telescope, the Lulin One-meter Telescope, the Canada-France-Hawaii Telescope, and Gemini-North. At the optical position, an X-ray source was marginally detected in the Swift/X-Ray Telescope 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 Γx = 1.6 ± 0.7 and F0.3–7keV=3.5–1.0+1.2×10–14 erg cm–2 s–1. The X-ray photon index and the low X-ray-to-γ-ray flux ratio (i.e., <1%) are both consistent with that of many known BW pulsars. There is also a hint of an X-ray orbital modulation in the Chandra data, although the significance is very low (1.3σ). If the pulsar identity and the X-ray modulation are confirmed, it would be the fifth BW millisecond pulsar binary that showed an orbitally modulated emission in X-rays.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): High energy astrophysics - Gamma-ray sources - Compact binary stars - Millisecond pulsars - X-ray sources

VizieR on-line data: <Available at CDS (J/ApJ/911/92): fig3.dat>

Simbad objects: 21

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