Gravitational Wave Events
LIGO/Virgo/KAGRA GCN alerts
Free
2.1.6for iPhone, iPod touch
Age Rating
Gravitational Wave Events Screenshots
About Gravitational Wave Events
Receive alerts of Gravitational Wave Events from the LIGO/Virgo/KAGRA Collaboration (LVK) on your iPhone.
This is an app for both the LIGO/Virgo/KAGRA Community and the general public. It provides low latency alerts using the Open Public Alerts currently being deployed by the Gamma-ray Coordinates Network (GCN) through GCN/LVK Notices (https://emfollow.docs.ligo.org/userguide/). To receive alerts using the app just select the category of alerts you wish to receive - it's that simple!
The O3 observing run ended in March 2020. O4 is expected to start in May 2023. The app will download all O4 events and counterparts as they are reported through a GCN Notice in addition to any related GCN Circulars. The app database is pre-populated with selected Notices and Circulars from all previous O1, O2 and O3 events. The app retains Notices for one Mock Event reported through GCN for testing purposes. (For information on LIGO/Virgo/KAGRA Collaboration GCN Notices see: https://gcn.gsfc.nasa.gov/lvc.html .)
Includes an interactive sky map showing the location of each event.
The app also has a public Message exchange bulletin board and some interesting Links. The Links provide information on Gravitational Waves and the LIGO and Virgo observatories.
This is an app for both the LIGO/Virgo/KAGRA Community and the general public. It provides low latency alerts using the Open Public Alerts currently being deployed by the Gamma-ray Coordinates Network (GCN) through GCN/LVK Notices (https://emfollow.docs.ligo.org/userguide/). To receive alerts using the app just select the category of alerts you wish to receive - it's that simple!
The O3 observing run ended in March 2020. O4 is expected to start in May 2023. The app will download all O4 events and counterparts as they are reported through a GCN Notice in addition to any related GCN Circulars. The app database is pre-populated with selected Notices and Circulars from all previous O1, O2 and O3 events. The app retains Notices for one Mock Event reported through GCN for testing purposes. (For information on LIGO/Virgo/KAGRA Collaboration GCN Notices see: https://gcn.gsfc.nasa.gov/lvc.html .)
Includes an interactive sky map showing the location of each event.
The app also has a public Message exchange bulletin board and some interesting Links. The Links provide information on Gravitational Waves and the LIGO and Virgo observatories.
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What's New in the Latest Version 2.1.6
Last updated on Aug 29, 2023
Old Versions
Corrected Bilby maps
Changed classification from Terrestrial to Neutron Star if BNS+NSBH>10%
Changed FAR threshold for High FAR when BNS+NSBH>10% to >1 per month
Changed FAR threshold for High FAR when BBH>90% to >1 per year
Changed classification from Terrestrial to Neutron Star if BNS+NSBH>10%
Changed FAR threshold for High FAR when BNS+NSBH>10% to >1 per month
Changed FAR threshold for High FAR when BBH>90% to >1 per year
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Version History
2.1.6
Aug 29, 2023
Corrected Bilby maps
Changed classification from Terrestrial to Neutron Star if BNS+NSBH>10%
Changed FAR threshold for High FAR when BNS+NSBH>10% to >1 per month
Changed FAR threshold for High FAR when BBH>90% to >1 per year
Changed classification from Terrestrial to Neutron Star if BNS+NSBH>10%
Changed FAR threshold for High FAR when BNS+NSBH>10% to >1 per month
Changed FAR threshold for High FAR when BBH>90% to >1 per year
2.1.5
May 31, 2023
Enabled Bilby sky maps
Added option to hide Mock Events
Added option to hide Mock Events
2.1.4
May 25, 2023
Update for some changes in O4 alerts
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Different and some very loud alert sounds for each type of Event.
More efficient handling of Notifications for an expanded user base.
Dark Mode, New Links.
Bug removed from 2.1.3
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Different and some very loud alert sounds for each type of Event.
More efficient handling of Notifications for an expanded user base.
Dark Mode, New Links.
Bug removed from 2.1.3
2.1.3
Apr 17, 2023
Ready for O4.
Different and some very loud alert sounds for each type of Event.
More efficient handling of Notifications for an expanded user base.
Dark Mode, New Links.
Bug removed from 2.1.2
Different and some very loud alert sounds for each type of Event.
More efficient handling of Notifications for an expanded user base.
Dark Mode, New Links.
Bug removed from 2.1.2
2.1.2
Apr 13, 2023
Ready for O4.
Different and some very loud alert sounds for each type of Event.
More efficient handling of Notifications for an expanded user base.
Dark Mode, New Links.
Different and some very loud alert sounds for each type of Event.
More efficient handling of Notifications for an expanded user base.
Dark Mode, New Links.
1.9.7
Dec 9, 2021
Messages ordered by date.
Improved crash protection.
Improved crash protection.
1.9.6
Dec 1, 2021
Messages ordered by date.
Improved crash protection.
Improved crash protection.
1.9.4
Jul 21, 2020
Option to hide all retracted and terrestrial Events.
Option to show Bayestar or LALInference sky map.
Option to show Bayestar or LALInference sky map.
1.9.3
Jun 20, 2020
Handles Test GCN Circulars for Early Warning Alert System
1.9.2
Nov 24, 2019
1.9.1 and 1.9.2 - minor bug fixes.
1.9 -Color coded events
Interactive Sky Maps for each event
Detector Status Link
Clear all "•" unread indicators
Improved accessibility large text in the tables
1.9.1
Nov 15, 2019
1.9.1 - minor bug fixes.
1.9 -Color coded events
Interactive Sky Maps for each event
Detector Status Link
Clear all "•" unread indicators
Improved accessibility large text in the tables
1.9 -Color coded events
Interactive Sky Maps for each event
Detector Status Link
Clear all "•" unread indicators
Improved accessibility large text in the tables
1.9
Nov 11, 2019
Color coded events
Interactive Sky Maps for each event
Detector Status Link
Clear all "•" unread indicators
Improved accessibility large text in the tables
Interactive Sky Maps for each event
Detector Status Link
Clear all "•" unread indicators
Improved accessibility large text in the tables
1.8.2
Jun 1, 2019
Version 1.8.2:
Fixed bugs in file initialization in Version 1.8 and 1.8.1
Version 1.8:
Added delete function for Message, Notice and Circular.
Added change-Event function for Notices and Circulars.
Automatically corrects faulty Event trigger numbers for Counterpart Notices.
Event Messages table only shows Events with messages.
Fixed bugs in file initialization in Version 1.8 and 1.8.1
Version 1.8:
Added delete function for Message, Notice and Circular.
Added change-Event function for Notices and Circulars.
Automatically corrects faulty Event trigger numbers for Counterpart Notices.
Event Messages table only shows Events with messages.
1.8.1
May 25, 2019
Version 1.8.1:
Fixed bugs in file initialization in Version 1.8
Version 1.8:
Added delete function for Message, Notice and Circular.
Added change-Event function for Notices and Circulars.
Automatically corrects faulty Event trigger numbers for Counterpart Notices.
Event Messages table only shows Events with messages.
Fixed bugs in file initialization in Version 1.8
Version 1.8:
Added delete function for Message, Notice and Circular.
Added change-Event function for Notices and Circulars.
Automatically corrects faulty Event trigger numbers for Counterpart Notices.
Event Messages table only shows Events with messages.
1.8
May 23, 2019
Added delete function for Message, Notice and Circular.
Added change-Event function for Notices and Circulars.
Automatically corrects faulty Event trigger numbers for Counterpart Notices.
Event Messages table only shows Events with messages.
Added change-Event function for Notices and Circulars.
Automatically corrects faulty Event trigger numbers for Counterpart Notices.
Event Messages table only shows Events with messages.
1.7
May 6, 2019
Counterpart Notices are grouped together (like Circulars).
Counterparts are ordered by Rank.
Event titles include most probable source (e.g. BBH or BNS)
Button to go to GraceDB Events Page added.
Certain entries that were submitted under incorrect Event Numbers are refiled.
Message bug fixed.
Counterparts are ordered by Rank.
Event titles include most probable source (e.g. BBH or BNS)
Button to go to GraceDB Events Page added.
Certain entries that were submitted under incorrect Event Numbers are refiled.
Message bug fixed.
1.6
Apr 23, 2019
Bug fix for increasing number of Circulars.
FAR expressed in years.
Alerts show explicit 'on-off'
Improved GCN Circular titles including Circular number
FAR expressed in years.
Alerts show explicit 'on-off'
Improved GCN Circular titles including Circular number
1.5
Mar 22, 2019
Version 1.5 resets all subscriptions and asks to allow notifications more correctly.
Version 1.4 handles notification contents more efficiently. The full Event text is included in the notification. Database fetches are minimized following a notification. This will allow the full community to access Event information immediately upon receipt of a notification.
Version 1.4 handles notification contents more efficiently. The full Event text is included in the notification. Database fetches are minimized following a notification. This will allow the full community to access Event information immediately upon receipt of a notification.
1.4
Mar 16, 2019
Version 1.4 handles notification contents more efficiently. The full Event text is included in the notification. Database fetches are minimized following a notification. This will allow the full community to access Event information immediately upon receipt of a notification.
1.3
Feb 6, 2019
Added: GCN/LVC Counterpart Notices and Circulars
GW Chirp alert sound option
Info and Report Abusive Posts buttons
Bugs removed that incorrectly ordered and labeled events
GW Chirp alert sound option
Info and Report Abusive Posts buttons
Bugs removed that incorrectly ordered and labeled events
1.2
Dec 27, 2018
Gravitational Wave Events FAQ
Click here to learn how to download Gravitational Wave Events in restricted country or region.
Check the following list to see the minimum requirements of Gravitational Wave Events.
iPhone
Requires iOS 11.0 or later.
iPod touch
Requires iOS 11.0 or later.
Gravitational Wave Events supports English
