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Peer-reviewedCC BY 4.0The Astrophysical Journal

Hunting for Compact Object Binaries from eRASS1 Optical Counterparts through ZTF Time-domain Photometry and Multiwavelength Surveys

  • Xin-Yu Fang1
  • Hao-Bin Liu1
  • Wei-Min Gu1
  1. 1Xiamen University
Open at sourcePDFDOICite

Abstract

Capitalizing on the eRASS1 optical counterpart catalog, we conduct a systematic search for compact object binary (COB) candidates, with a primary focus on X-ray binaries (XRBs), by integrating Zwicky Transient Facility (ZTF) time-domain photometry with multiwavelength data. This framework establishes two independent pipelines, yielding two samples. The first sample consists of 151 periodically variable sources, from which a highly refined subset of 43 high-priority COB candidates is identified. The second sample comprises 1958 distance-constrained sources selected on the basis of their elevated X-ray luminosities or high log ( F X / F opt ) values. Crucially, cross-matching both samples with radio catalogs reveals seven radio-emitting sources, highlighting four promising XRB candidates. Our results underscore that coupling eROSITA with wide-field time-domain photometric and multiwavelength surveys offers a highly efficient strategy for uncovering the hidden population of COBs.

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Cite

BibTeXRIS
BibTeX
@article{fang2026hunting,
  title = {{Hunting for Compact Object Binaries from eRASS1 Optical Counterparts through ZTF Time-domain Photometry and Multiwavelength Surveys}},
  author = {Xin-Yu Fang and Hao-Bin Liu and Wei-Min Gu},
  journal = {The Astrophysical Journal},
  year = {2026},
  month = nov,
  doi = {10.3847/1538-4357/aeada2},
  url = {https://iopscience.iop.org/article/10.3847/1538-4357/aeada2},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Hunting for Compact Object Binaries from eRASS1 Optical Counterparts through ZTF Time-domain Photometry and Multiwavelength Surveys
AU  - Xin-Yu Fang
AU  - Hao-Bin Liu
AU  - Wei-Min Gu
PY  - 2026
DA  - 2026/11/02
JO  - The Astrophysical Journal
DO  - 10.3847/1538-4357/aeada2
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/aeada2
AB  - Capitalizing on the eRASS1 optical counterpart catalog, we conduct a systematic search for compact object binary (COB) candidates, with a primary focus on X-ray binaries (XRBs), by integrating Zwicky Transient Facility (ZTF) time-domain photometry with multiwavelength data. This framework establishes two independent pipelines, yielding two samples. The first sample consists of 151 periodically variable sources, from which a highly refined subset of 43 high-priority COB candidates is identified. The second sample comprises 1958 distance-constrained sources selected on the basis of their elevated X-ray luminosities or high log ( F X / F opt ) values. Crucially, cross-matching both samples with radio catalogs reveals seven radio-emitting sources, highlighting four promising XRB candidates. Our results underscore that coupling eROSITA with wide-field time-domain photometric and multiwavelength surveys offers a highly efficient strategy for uncovering the hidden population of COBs.
SN  - 1538-4357
SN  - 0004-637X
ER  -