Limits on the electromagnetic counterpart to S190814bv

A. M. Watson, N. R. Butler, W. H. Lee, R. L. Becerra, M. Pereyra, F. Angeles, A. Farah, L. Figueroa, D. Gónzalez-Buitrago, F. Quirós, J. Ruíz-Díaz-Soto, C. Tejada De Vargas, S. J. Tinoco, T. Wolfram

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We derive limits on any electromagnetic counterpart to the compact binary merger S190814bv, whose parameters are consistent with the merger of a black hole and a neutron star. We present observations with the new wide-field optical imager DDOTI and also consider Swift/BAT observations reported by Palmer et al. We show that Swift/BAT would have detected a counterpart with similar properties to a typical on-axis short GRB at the 98 per cent confidence level, whereas our DDOTI observations only rule out such a counterpart at the 27 per cent confidence level. Neither has sufficient sensitivity to rule out an off-axis counterpart like GW 170817. We compare the efficiency of Swift/BAT and DDOTI for future observations, and show that DDOTI is likely to be about twice as efficient as Swift/BAT for off-axis events up to about 100 Mpc.

Original languageEnglish (US)
Pages (from-to)5916-5921
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Volume492
Issue number4
DOIs
StatePublished - 2020

Keywords

  • Binaries: close
  • Gamma-ray burst: general
  • Gravitational waves
  • Stars: black holes
  • Stars: neutron

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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