A compact X-ray emitting binary in likely association with 4FGL J0935.3+0901

We present an incremental version (4FGL-DR2, for Data Release 2) of the fourth Fermi -LAT catalog of γ-ray sources. Based on the first ten years of science data in the energy range from 50 MeV to 1 TeV, it uses the same analysis methods as the 4FGL catalog did for eight years of data. The spectral parameters, spectral energy distributions and associations are updated for all sources. Light curves are rebuilt for all sources with 1-year intervals (not 2-month intervals).Among the 5064 4FGL sources, 120 are formally below the detection threshold over 10 years (but are kept in the list), while 40 are newly associated. We report 723 new sources, mostly just above the detection threshold, among which two are considered identified and 342 have a plausible counterpart at other wavelengths.

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“…• The association of the MSP binary recently discovered by Wang et al (2020) with 4FGL J0935.3+0901 has been implemented.…”

Section: Associationsmentioning

confidence: 99%

Fermi Large Area Telescope Fourth Source Catalog Data Release 2

Ballet¹,

Burnett²,

Digel³

et al. 2020

Preprint

172

204

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“…• The association of the MSP binary recently discovered by Wang et al (2020) with 4FGL J0935.3+0901 has been implemented. Its class is BIN;…”

Section: Association/classification Changes In 4fgl-dr1 Sourcesmentioning

confidence: 99%

Incremental Fermi Large Area Telescope Fourth Source Catalog

Abdollahi,

Acero,

Baldini

et al. 2022

Preprint

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We present an incremental version (4FGL-DR3, for Data Release 3) of the fourth Fermi -LAT catalog of γ-ray sources. Based on the first twelve years of science data in the energy range from 50 MeV to 1 TeV, it contains 6658 sources. The analysis improves on that used for the 4FGL catalog over eight years of data: more sources are fit with curved spectra, we introduce a more robust spectral parametrization for pulsars, and we extend the spectral points to 1 TeV. The spectral parameters, spectral energy distributions and associations are updated for all sources. Light curves are rebuilt for all sources with 1-year intervals (not 2-month intervals).Among the 5064 original 4FGL sources, 16 were deleted, 112 are formally below the detection threshold over 12 years (but are kept in the list), while 74 are newly associated, 10 have an improved association and seven associations were withdrawn. Pulsars are split explicitly between young and millisecond pulsars. Pulsars and binaries newly detected in LAT sources, as well as more than 100 newly classified blazars, are reported. We add three extended sources and 1607 new point sources, mostly just above the detection threshold, among which eight are considered identified and 699 have a plausible counterpart at other wavelengths.We discuss degree-scale residuals to the global sky model and clusters of soft unassociated point sources close to the Galactic plane, which are possibly related to limitations of the interstellar emission model and missing extended sources.

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“…The recently identified source 4FGL J0935.3+0901 https://fermi.gsfc.nasa.gov/ssc/data/access/lat/10yr_catalog/ has an optical counterpart with double-peaked emission lines, features gamma-ray properties similar to tMSPs, and showed an enhancement by a factor about 8 between Dec. 2010 and Jul. 2013 with significant spectral change [165]. However, its X-rayto-gamma-ray flux ratio (∼ 40) was more typical of spiders in the rotational-powered state rather than of tMSPs in the sub-luminous disc state.…”

Section: Candidate Transitional Millisecond Pulsarsmentioning

confidence: 99%

Transitional millisecond pulsars

Papitto,

de Martino

2020

Preprint

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Millisecond pulsars in tight binaries have recently opened new challenges in our understanding of physical processes governing the evolution of binaries and the interaction between astrophysical plasma and electromagnetic fields. Transitional systems that showed changes from rotation-powered to accretion powered states and vice versa have bridged the populations of radio and accreting millisecond pulsars, eventually demonstrating the tight evolutionary link envisaged by the recycling scenario. A decade of discoveries and theoretical efforts have just grasped the complex phenomenology of transitional millisecond pulsars from the radio to the gamma-ray band. This review summarises the main properties of the three transitional millisecond pulsars discovered so far, as well as of candidates and related systems, discussing the various models proposed to cope with the multifaceted behaviour.

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A compact X-ray emitting binary in likely association with 4FGL J0935.3+0901

Cited by 20 publications

References 50 publications

Fermi Large Area Telescope Fourth Source Catalog Data Release 2

Fermi Large Area Telescope Fourth Source Catalog Data Release 2

Incremental Fermi Large Area Telescope Fourth Source Catalog

Transitional millisecond pulsars

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