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 130606A: P60 Observations
- GRB 080319B: Jet Break, Energetics, Supernova
- GRB 071021: possible high-z burst
- GRB 060928: Swift observations
- Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
- GRB 060323: Tautenburg OT candidate retraction
- GRB050922B: Swift-BAT detection of a weak long burst
- GRB 050904 BAT refined analysis of complete data set
- GRB 050904: Subaru Optical Spectroscopy
- GRB 050904: Keck I-band Imaging
- GRB 050904: BOOTES early R-band observation
- GRB 050904: photometric redshift
- GRB 050904: Swift/UVOT observations
- GRB 050904: NIR object inside the XRT error box
- GRB 050904: SOAR YJ and PROMPT Ic Observations
- GRB 050904: BAT refined analysis of partial data set
- GRB 050904: TAROT optical measurements
- GRB 050904: SOAR/PROMPT Observations
- GRB 050904: TAROT optical limits