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"19 results found.
- GRB 200826A: GMOS-N detected source magnitude (Correction)
- GRB 200826A: TNG and LBT constraints on a supernova bump
- GRB200826A: GMOS-N detection of a supernova bump
- GRB 200826A: uGMRT radio upper limit at 1.25 GHz
- GRB 200826A
- GRB 200826A: Lowell Discovery Telescope observations of ZTF20abwysqy
- GRB 200826A: Kitab optical observations
- GRB 200826A: VLA Detection at 6 GHz
- GRB 200826A: further analysis of the Konus-Wind data and classification
- GRB 200826A: Swift-XRT afterglow detection
- Konus-Wind detection of GRB 200826A
- IPN triangulation of GRB 200826A (short/bright)
- GRB 200826A: Tiled Swift observations
- GRB 200826A: AGILE detection
- GRB 200826A: AstroSat CZTI detection
- GRB 200826A: Fermi GBM observation
- GRB 200826A: BALROG localization (Fermi Trigger 620108997 / GRB 200826187)
- Fermi GRB 200826A: Global MASTER-Net observations report
- GRB 200826A: Fermi GBM Final Real-time Localization