A 350-MHz Green Bank Telescope Survey of Unassociated Fermi LAT Sources: Discovery and Timing of Ten Millisecond Pulsars

Abstract

We have searched for radio pulsations towards 49 Fermi Large Area Telescope (LAT) 1FGL Catalog $\gamma$-ray sources using the Green Bank Telescope at 350 MHz. We detected 18 millisecond pulsars (MSPs) in blind searches of the data; 10 of these were discoveries unique to our survey. Sixteen are binaries, with eight having short orbital periods $P_B<1$ day. No radio pulsations from young pulsars were detected, although three targets are coincident with apparently radio-quiet $\gamma$-ray pulsars discovered in LAT data. Here, we give an overview of the survey and present radio and $\gamma$-ray timing results for the 10 MSPs discovered. These include the only isolated MSP discovered in our survey and six short-$P_B$ binary MSPs. Of these, three have very low-mass companions ($M_c$ $\ll$ 0.1M${}_{\odot }$) and hence belong to the class of black widow pulsars. Two have more massive, non-degenerate companions with extensive radio eclipses and orbitally modulated X-ray emission consistent with the redback class. Significant $\gamma$-ray pulsations have been detected from nine of the discoveries. This survey and similar efforts suggest that the majority of Galactic $\gamma$-ray sources at high Galactic latitudes are either MSPs or relatively nearby non-recycled pulsars, with the latter having on average a much smaller radio/$\gamma$-ray beaming ratio as compared to MSPs. It also confirms that past surveys suffered from an observational bias against finding short-$P_B$ MSP systems.

Accepted for publication in ApJ (25 pages, 15 figues, 4 tables)

References in corpus (40)

• Shapiro delay measurement of a two solar mass neutron star
• TEMPO2, a new pulsar timing package. I: Overview
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• A Radio Pulsar/X-ray Binary Link
• Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey
• Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
• Precise Gamma-Ray Timing and Radio Observations of 17 Fermi Gamma-Ray Pulsars
• The Green Bank Northern Celestial Cap Pulsar Survey - I: Survey Description, Data Analysis, and Initial Results
• PINT: A Modern Software Package for Pulsar Timing
• Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources
• The Third Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars
• PSR J1810+1744: Companion Darkening and a Precise High Neutron Star Mass
• Optical spectroscopy and demographics of redback millisecond pulsar binaries
• The NANOGrav 12.5-year Data Set: Wideband Timing of 47 Millisecond Pulsars
• Constraints on the Emission Geometries and Spin Evolution of Gamma-ray Millisecond Pulsars
• Atmospheric Circulation on Black Widow Companions
• A Survey of 56 Mid-latitude EGRET Error Boxes for Radio Pulsars
• Discovery of new gamma-ray pulsars with AGILE
• Einstein@Home Discovery of the Gamma-ray Millisecond Pulsar PSR J2039-5617 Confirms Its Predicted Redback Nature
• Six millisecond pulsars detected by the Fermi Large Area Telescope and the radio/gamma-ray connection of millisecond pulsars
• A Gamma-ray Pulsar Timing Array Constrains the Nanohertz Gravitational Wave Background
• Optical precursors to X-ray binary outbursts
• Discovery of Gamma-ray Pulsations from the Transitional Redback PSR J1227-4853
• Discovery of High-Energy Gamma-Ray Pulsations from PSR J2021+3651 with AGILE
• FAST discovery of an extremely radio-faint millisecond pulsar from the Fermi-LAT unassociated source 3FGL J0318.1+0252
• 1FGL J0523.5-2529: A New Probable Gamma-ray Pulsar Binary
• The TRAPUM L-band survey for pulsars in Fermi-LAT gamma-ray sources
• A New Flaring Black Widow Candidate and Demographics of Black Widow Millisecond Pulsars in the Galactic Field
• Neutron star mass estimates from gamma-ray eclipses in spider millisecond pulsar binaries
• A high frequency search for radio pulsars in EGRET error boxes
• A black widow population dissection through HiPERCAM multi-band light curve modelling
• Timing of Eight Binary Millisecond Pulsars Found with Arecibo in Fermi-LAT Unidentified Sources
• Exploring the intrabinary shock from the redback millisecond pulsar PSR J2129-0429
• A millisecond pulsar discovery in a survey of unidentified Fermi $\gamma$-ray sources with LOFAR
• Formation of redbacks via accretion induced collapse
• Discovery and timing of three millisecond pulsars in radio and gamma-rays with the GMRT and Fermi-LAT
• 4FGL J1120.0-2204: A Unique Gamma-ray Bright Neutron Star Binary with an Extremely Low Mass Proto-White Dwarf
• A Multi-wavelength search for Black Widows and Redbacks counterparts of candidate $\gamma$-ray millisecond pulsars

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