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.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"13 results found.
- GRB 150101B/ Swift J123205.1-105602: Second epoch Chandra observations
- GRB 150101B: Confirmation of a fading optical counterpart
- GRB 150101B/Swift J123205.1-105602: TNG NIR follow-up
- GRB 150101B/Swift J123205.1-105602, deep VLT observations
- GRB 150101B/Swift J123205.1-105602: XMM-Newton observation
- GRB 150101B/Swift J123205.1-105602: continued WSRT radio and VLT optical observations
- GRB 150101B/Swift J123205.1-105602: Chandra observations
- GRB 150101B / Swift J123205.1-105602: 9.8 GHz VLA observations
- GRB 150101B/Swift J123205.1-105602: WSRT radio observation
- GRB 150101B / Swift J123205.1-105602: X-ray counterpart is likely an AGN
- GRB 150101B/Swift J123205.1-105602: VLT observations and redshift
- GRB 150101B: potential host galaxy redshift by GTC
- GRB 150101B: Fermi GBM detection