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.
Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
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"17 results found.
- LIGO/Virgo S190513bm: Swope follow-up observations
- LIGO/Virgo S190513bm : TAROT-Calern and TAROT-Chile (TCA/TCH)/GRANDMA observation report.
- LIGO/Virgo S190513bm: CALET Observations
- LIGO/Virgo S190513bm: Lick/KAIT Follow-Up Observations
- LIGO/Virgo S190513bm: Swift/BAT Counterpart Search
- LIGO/Virgo S190513bm: Insight-HXMT/HE observation
- LIGO/Virgo S190513bm: ANTARES neutrino search
- LIGO/Virgo S190513bm: Fermi GBM Observations
- LIGO/Virgo S190513bm: Fermi-LAT search for a high-energy gamma-ray counterpart
- LIGO/Virgo S190513bm: MAXI/GSC Observations
- LIGO/Virgo S190513bm: AGILE GRID observations
- LIGO/Virgo S190513bm: INTEGRAL prompt observation
- LIGO/Virgo S190513bm: AGILE MCAL observation
- LIGO/Virgo S190513bm Global MASTER-Net observations report
- LIGO/Virgo S190513bm: IceCube Neutrino Search
- LIGO/Virgo S190513bm: HAWC follow-up
- LIGO/Virgo S190513bm: Identification of a GW compact binary merger candidate