{
  "id": "1808.08247",
  "version": "v1",
  "published": "2018-08-24T18:08:50.000Z",
  "updated": "2018-08-24T18:08:50.000Z",
  "title": "Expanding the LISA Horizon from the Ground",
  "authors": [
    "Kaze W. K. Wong",
    "Ely D. Kovetz",
    "Curt Cutler",
    "Emanuele Berti"
  ],
  "comment": "5 pages, 2 figures",
  "categories": [
    "astro-ph.HE",
    "gr-qc"
  ],
  "abstract": "The Laser Interferometer Space Antenna (LISA) gravitational-wave (GW) observatory will be limited in its ability to detect mergers of binary black holes (BBHs) in the stellar-mass range. A future ground-based detector network, meanwhile, will achieve by the LISA launch date a sensitivity that ensures complete detection of all mergers within a volume $>\\!\\mathcal{O}(10)\\,{\\rm Gpc}^{3}$. We propose a method to use the information from the ground to revisit the LISA data in search for sub-threshold events. By discarding spurious triggers that do not overlap with the ground-based catalogue, we show that the signal-to-noise threshold $\\rho_{\\rm LISA}$ employed in LISA can be significantly lowered, greatly boosting the detection rate. The efficiency of this method depends predominantly on the rate of false-alarm increase when the threshold is lowered and on the uncertainty in the parameter estimation for the LISA events. As an example, we demonstrate that while all current LIGO BBH-merger detections would have evaded detection by LISA when employing a standard $\\rho_{\\rm LISA}=8$ threshold, this method will allow us to easily (possibly) detect an event similar to GW150914 (GW170814) in LISA. Overall, we estimate that the total rate of stellar-mass BBH mergers detected by LISA can be boosted by a factor $\\sim\\!4$ ($\\gtrsim\\!8$) under conservative (optimistic) assumptions. This will enable new tests using multi-band GW observations, significantly aided by the greatly increased lever arm in frequency.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-08-24T18:08:50.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "lisa horizon",
      "laser interferometer space antenna",
      "current ligo bbh-merger detections",
      "lisa launch date",
      "ensures complete detection"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}