2023-11-18T02:16:15Z LIGO Scientific Collaboration, Virgo Collaboration, and KAGRA Collaboration The Notice Type number is assigned/used within GCN, eg type=150 is an LVC_PRELIMINARY notice Indicates whether this event should be distributed to LSC/Virgo/KAGRA members only A number that increments by 1 each time a new revision is issued for this event Identifier in GraceDB VOEvent alert type Indicates that this event is a hardware injection if 1, no if 0 Indicates that this event is an open alert if 1, no if 0 Web page for evolving status of this GW candidate List of instruments used in analysis to identify this event False alarm rate for GW candidates with this strength or greater Indicates that this event is significant if 1, no if 0 Data analysis working group Low-latency data analysis pipeline Specific low-latency search Sky Map FITS Probability that the source is a binary neutron star merger (both objects lighter than 3 solar masses) Probability that the source is a neutron star-black merger (secondary lighter than 3 solar masses) Probability that the source is a binary black hole merger (both objects heavier than 3 solar masses) Probability that the source is terrestrial (i.e., a background noise fluctuation or a glitch) Source classification: binary neutron star (BNS), neutron star-black hole (NSBH), binary black hole (BBH), or terrestrial (noise) Probability that at least one object in the binary has a mass that is less than 3 solar masses Probability that a nonzero mass was ejected outside the central remnant object Probability that the source has at least one object between 3 and 5 solar masses Qualitative properties of the source, conditioned on the assumption that the signal is an astrophysical compact binary merger Report of a candidate gravitational wave event Candidate gravitational wave event identified by low-latency analysis H1: LIGO Hanford 4 km gravitational wave detector L1: LIGO Livingston 4 km gravitational wave detector 2023-11-18T02:20:51Z LIGO Scientific Collaboration, Virgo Collaboration, and KAGRA Collaboration The Notice Type number is assigned/used within GCN, eg type=150 is an LVC_PRELIMINARY notice Indicates whether this event should be distributed to LSC/Virgo/KAGRA members only A number that increments by 1 each time a new revision is issued for this event Identifier in GraceDB VOEvent alert type Indicates that this event is a hardware injection if 1, no if 0 Indicates that this event is an open alert if 1, no if 0 Web page for evolving status of this GW candidate List of instruments used in analysis to identify this event False alarm rate for GW candidates with this strength or greater Indicates that this event is significant if 1, no if 0 Data analysis working group Low-latency data analysis pipeline Specific low-latency search Sky Map FITS Probability that the source is a binary neutron star merger (both objects lighter than 3 solar masses) Probability that the source is a neutron star-black merger (secondary lighter than 3 solar masses) Probability that the source is a binary black hole merger (both objects heavier than 3 solar masses) Probability that the source is terrestrial (i.e., a background noise fluctuation or a glitch) Source classification: binary neutron star (BNS), neutron star-black hole (NSBH), binary black hole (BBH), or terrestrial (noise) Probability that at least one object in the binary has a mass that is less than 3 solar masses Probability that a nonzero mass was ejected outside the central remnant object Probability that the source has at least one object between 3 and 5 solar masses Qualitative properties of the source, conditioned on the assumption that the signal is an astrophysical compact binary merger Report of a candidate gravitational wave event Candidate gravitational wave event identified by low-latency analysis H1: LIGO Hanford 4 km gravitational wave detector L1: LIGO Livingston 4 km gravitational wave detector ivo://gwnet/LVC#S231118i-1-Preliminary Initial localization is now available (preliminary)