A dataset provided by the European Space Agency

Obs ID 1862531
Target/Line-of-sight Precise Mass Measurement for the Compact Object in LS 5039: The Heaviest Neutron Star or the Lightest Stellar-mass Black Hole?
Gaia DR2 ID GAIA DR2 4104196427943626624
URL https://cheops.unige.ch/archive_browser/?visit-id=1862531
DOI https://doi.org/10.57780/esa-lrwatqg
Author European Space Agency, Jianfeng wu
Description of observation
  • Target RA (J2000): 276.562744140625 °
  • Target Dec (J2000): -14.8484001159668 °
  • Gaia GMag: 10.799

  • Programme ID: CH_PR230038
  • PI of observing programme: Jianfeng wu
  • Title of programme: Precise Mass Measurement for the Compact Object in LS 5039: The Heaviest Neutron Star or the Lightest Stellar-mass Black Hole?
  • Abstract: LS 5039 is a gamma-ray binary containing a compact object within the mass gap (2-5 solar masses). It could potentially be the heaviest neutron star or the lightest stellar-mass black hole. However, to precisely constrain its mass, high-precision optical photometry at the level of 0.1 mmag (100 ppm) is required. Therefore, we propose a CHEOPS monitoring campaign to obtain the needed light curve.
Temporal Coverage 2022-07-18T01:44:00Z / 2022-07-18T08:20:00Z
Version 3.0
Mission Description CHEOPS (Benz et al., https://doi.org/10.1007/s10686-020-09679-4) is a European Space Agency (ESA) mission in partnership with Switzerland with important contributions to the payload and the ground segment from Austria, Belgium, France, Germany, Hungary, Italy, Portugal, Spain, Sweden and the United Kingdom.

The satellite has a single payload comprising an ultra-high precision photometer covering the 330 - 1100 nm wavelength range in a single photometric band. Observations are made as part of the Guaranteed Time Observing Programme that is formulated by the CHEOPS Science Team, and the Guest Observers Programme through which the Community at large can apply for CHEOPS time.
Creator Contact https://www.cosmos.esa.int/web/cheops/contact
Date Published 2025-01-27T20:35:33Z
Last Update 2025-01-27
Keywords CHEOPS, EXOPLANETS, wide-band photometer
Acknowledgements https://www.cosmos.esa.int/web/cheops-guest-observers-programme/publication-guidelines
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Jianfeng wu et al., 2025, 'Precise Mass Measurement for the Compact Object in LS 5039: The Heaviest Neutron Star or the Lightest Stellar-mass Black Hole?', 3.0, European Space Agency, https://doi.org/10.57780/esa-lrwatqg