Gravitational Wave Localization and Pointings: S230831cn [GraceDB]



GRB Coverage



XRT Sources


Pointing Status

Group CBC
Detectors H1,L1
Time of Signal 2023-08-31 20:48:47.267365 UTC
Time Sent 2023-08-31 20:49:06 UTC
False Alarm Rate once per 1.38 days
50% Area 256.771 deg2
90% Area 868.879 deg2
Distance 2152.071 +/- 679.577 Mpc
Classification (CBC Only)
BNS 0.0
NSBH 0.01654
Mass Gap 0.1768
BBH 0.05535
Terrestrial 0.92811
Has NS 7e-05
Has Remnant 0.0

Coverage Calculator

Calculate the coverage of the GW localization over time, with choices to limit the coverage calculation to particular sets of instruments, wavelengths, or depth. All fields are optional, but cuts on depths must have an associated unit. If an empty form is submitted, the total reported coverage regardless of depth or band is computed. Once a HEALPIX pixel has been first covered, it is marked as done, to avoid double counting probability when the same field is covered multiple times. After clicking, be patient, it may take up to 2 minutes to fully compute the coverage profile.
Instrument Depth Depth Unit Approximate For footprints with multiple ccd's this will approximate the calculator's input by using a simplified instrument footprint without chip-gaps. It is substantially faster, but does introduce a level of uncertainty in the resulting area and probability.
Band Spectral Range Filter pointings based on their wavelength, energy, or frequency range Type: Range: - Unit