GCN Circulars
GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Advanced Search Examples (click to copy):
subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"
21 results found.
- LIGO/Virgo S190521g: AstroSat CZTI upper limits
- LIGO/Virgo S190521g: No optical counterpart from SVOM/GWAC-F30 observations.
- LIGO/Virgo S190521g: No optical counterpart from SVOM/GWAC observations.
- LIGO/Virgo S190521g: Upper limits from Insight-HXMT/HE observations
- LIGO/Virgo S190521g: Upper limits from CALET observations
- LIGO/Virgo S190521g: Swift/BAT Counterpart Search
- LIGO/Virgo S190521g: No Counterparts in DDOTI/OAN Optical Observations
- LIGO/Virgo S190521g : Upper limits from Fermi-GBM observations
- LIGO/Virgo S190521g: Updated sky localization
- LIGO/Virgo S190521g: No candidate counterpart in Fermi-LAT observations
- LIGO/Virgo S190521r: Upper limits from AGILE-GRID observations
- LIGO/Virgo S190521g: No neutrino counterpart candidates in ANTARES search
- LIGO-Virgo S190521g: Upper Limits from AGILE-GRID observations
- IGO/Virgo S190521g: Coverage and upper limits from MAXI/GSC observations
- LIGO/Virgo S190521g: No counterpart candidates in INTEGRAL SPI/ACS & IBIS/PICsIT prompt observations
- LIGO/Virgo S190521g: No counterpart candidates in AGILE-MCAL observations
- LIGO/Virgo S190521g: No counterpart candidates in HAWC observations
- LIGO/Virgo S190521g: Identification of a GW compact binary merger candidate
- LIGO/Virgo S190521g: INTEGRAL SPI/ACS prompt observation
- LIGO/Virgo S190521g Global MASTER-Net observations report
- LIGO/Virgo S190521g: IceCube Neutrino Search