The Distance of the Gamma-ray Binary 1FGL J1018.6-5856

Abstract

The recently discovered gamma-ray binary 1FGL J1018.6-5856 has a proposed optical/near-infrared (OIR) counterpart 2MASS 10185560-5856459. We present Stromgren photometry of this star to investigate its photometric variability and measure the reddening and distance to the system. We find that the gamma-ray binary has E(B-V) = 1.34 +/- 0.04 and d = 5.4^+4.6_-2.1 kpc. While E(B-V) is consistent with X-ray observations of the neutral hydrogen column density, the distance is somewhat closer than some previous authors have suggested.

Accepted to PASP

Cited by in corpus (13)

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• Stellar Binaries That Survive Supernovae
• Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
• Overview of non-transient gamma-ray binaries and prospects for the Cherenkov Telescope Array
• The missing GeV γ-ray binary: Searching for HESS J0632+057 with Fermi-LAT
• Optical spectroscopy of the high-mass gamma-ray binary 1FGL J1018.6-5856: A probable neutron star primary
• The Distance Measurements of Supernova Remnants in The Fourth Galactic Quadrant
• Refining the origins of the gamma-ray binary 1FGL J1018.6-5856
• Magnesium-rich Ejecta in the SNR G284.3$-$1.8 Around the High-Mass Gamma-Ray Binary 1FGL J1018.6$-$5856
• Improved binary solution for the gamma-ray binary 1FGL J1018.6-5856
• Modeling the High-energy Emission from the Gamma-ray Binary 1FGL J1018.6-5856