High-energy Variability of PSR J1311-3430

An, Hongjun; Romani, Roger W.; Johnson, Tyrel; Kerr, Matthew; Clark, Colin J.

doi:10.3847/1538-4357/aa947f

High-energy Variability of PSR J1311-3430

Journal Article · Tue Nov 21 00:00:00 EST 2017 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/1538-4357/aa947f· OSTI ID:1419643

^[1]; ^[2]; Johnson, Tyrel ^[3]; ^[3]; ^[4]

Chungbuk National Univ., Cheongju (Korea); Stanford Univ., Stanford, CA (United States)
Stanford Univ., Stanford, CA (United States)
George Mason Univ., Fairfax, VA (United States)
Max-Planck-Institut fur Gravitationsphysik, Hannover (Germany); Leibniz Univ. Hannover, Hannover (Germany)

Here, we have studied the variability of the black-widow-type binary millisecond pulsar PSR J1311–3430 from optical to gamma-ray energies. We confirm evidence for orbital modulation in the weak off-pulse ≳200 MeV emission, with a peak at $${\phi }_{B}\approx 0.8$$, following pulsar inferior conjunction. The peak has a relatively hard spectrum, extending above ~1 GeV. XMM-Newton and Swift UV observations also show that this source's strong X-ray flaring activity is associated with optical/UV flares. With a duty cycle of ~7%–19%, this flaring is quite prominent with an apparent power-law intensity distribution. Flares are present at all orbital phases, with a slight preference for $${\phi }_{B}=0.5\mbox{--}0.7$$. We explore possible connections of these variabilities with the intrabinary shock and magnetic activity on the low-mass secondary.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1419643

Journal Information:: The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 1 Vol. 850; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Signatures of Intra-binary Shock Emission in the Black Widow Pulsar Binary PSR J2241−5236 An, Hongjun; Romani, Roger W.; Kerr, Matthew The Astrophysical Journal, Vol. 868, Issue 1 https://doi.org/10.3847/2041-8213/aaedaf	journal	November 2018

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