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"9 results found.
- ZTF22aabjpxh/AT2022cva (GRB 220219B): evidence of supernova in LBT spectra
- ZTF22aabjpxh/AT2022cva (GRB 220219B): continued optical observations, possible photometric evidence of SN
- ZTF22aabjpxh/AT2022cva (GRB 220219B): continued optical observations, SN signature search
- Konus-Wind observation of GRB 220219B
- GRB 220219B: Swift-XRT observations
- ZTF22aabjpxh/AT2022cva (GRB 220219B): Mondy optical observations
- GRB 220219B: Swift ToO observations
- ZTF22aabjpxh/AT2022cva: Assy optical observations
- IPN triangulation of GRB 220219B (consistent with ZTF22aabjpxh/AT2022cva)