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"18 results found.
- GRB 210410A: AstroSat CZTI detection
- GRB 210410A: A twin of short GRB 090510 with complementary observations
- GRB 210410A: Swift/UVOT Upper Limits (revision)
- GRB 210410A: MITSuME Akeno optical upper limits
- GRB 210410A: AGILE/MCAL analysis
- Konus-Wind detection of GRB 210410A
- GRB 210410A: Swift-BAT refined analysis
- GRB 210410A: Swift-XRT refined Analysis
- GRB 210410A: Fermi GBM detection
- GRB 210410A: Swift/UVOT Upper Limits
- GRB210410A: Joint inspection of RATIR and D50 data
- GRB 210410A: RATIR Optical and NIR Observations
- GRB 210410A: AGILE detection of a burst
- GRB 210410A: Fermi-LAT detection
- GRB210410A: Candidate optical afterglow by Ondrejov D50
- Fermi GRB 210410A: Global MASTER-Net observations report
- GRB 210410A: Swift XRT localization
- GRB 210410A: Fermi GBM Final Real-time Localization