COBIPULSE: A Systematic Search for Compact Binary Millisecond Pulsars
Marco Turchetta, Manuel Linares, Karri Koljonen, Jorge Casares, Paulo, A. Miles-P\'aez, Pablo Rodr\'iguez-Gil, Tariq Shahbaz, Jordan A. Simpson

TL;DR
This paper reports a systematic optical survey that discovered four new candidate compact binary millisecond pulsars, or 'spiders', using multi-band imaging and analysis of their orbital properties, colors, and flux modulation.
Contribution
It introduces COBIPULSE, a new systematic optical search method for identifying candidate spider pulsars associated with Fermi gamma-ray sources, leading to four new potential discoveries.
Findings
Discovered four optical variables coinciding with Fermi sources.
Identified properties consistent with the redback subclass of spider pulsars.
Placed upper limits on X-ray luminosities of the candidates.
Abstract
We report here the results obtained from a systematic optical photometric survey aimed at finding new compact binary millisecond pulsars (also known as "spiders"): the COmpact BInary PULsar SEarch (COBIPULSE). We acquired multi-band optical images over one year around unidentified Fermi-LAT sources, selected as pulsar candidates based on their curved GeV spectra and steady -ray emission. We present the discovery of four optical variables coinciding with the Fermi sources 3FGL J0737.23233, 3FGL J2117.63725 (two systems in this field) and 3FGL J2221.66507, which we propose as new candidate spider systems. Indeed, they all show optical flux modulation consistent with orbital periods of , , , and , respectively, with amplitudes and colors…
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Taxonomy
TopicsParticle accelerators and beam dynamics · Superconducting Materials and Applications · Particle Accelerators and Free-Electron Lasers
