COBIPLANE: A Systematic Search for Compact Binary Millisecond Pulsars at Low Galactic Latitudes
Marco Turchetta, Manuel Linares, Karri Koljonen, Paulo A. Miles-P\'aez, Jordan A. Simpson

TL;DR
This paper reports a systematic optical survey targeting gamma-ray sources to discover new binary millisecond pulsars, successfully identifying five candidate systems with properties consistent with 'redback' spider pulsars, extending searches closer to the Galactic plane.
Contribution
It introduces COBIPLANE, a novel survey extending previous searches to lower Galactic latitudes, and reports the discovery of five new candidate spider pulsar systems based on optical and X-ray observations.
Findings
Discovered five optical variables coincident with gamma-ray sources.
Identified systems with orbital periods and temperatures consistent with redback pulsars.
Classified these systems as new spider candidate pulsars based on multi-wavelength properties.
Abstract
We present the main results obtained from the COmpact BInary Pulsar search in the low-LAtitude NEighborhood (COBIPLANE), an optical photometric survey designed to find new `spider' binary millisecond pulsars. We conducted observations targeting 30 unidentified sources from the 4FGL-DR3 Fermi Large Area Telescope (Fermi-LAT) catalog, selected for their pulsar-like -ray properties. Extending to Galactic latitudes as low as , this survey reaches closer to the Galactic plane than its predecessor survey, the COmpact BInary PULsar SEarch (COBIPULSE). We report the discovery of five optical variables coincident with the localizations of 4FGL J0821.5-1436, 4FGL J1517.9-5233, 4FGL J1639.3-5146, 4FGL J1748.8-3915, and 4FGL J2056.4+3142. These systems show optical flux modulation at the presumed orbital periods of , , $0.204(7)…
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Astrophysical Phenomena and Observations · Stellar, planetary, and galactic studies
